"""
Unified Compliance Check Routes — check all documents in one request.

POST /compliance/agent/extract-text — extract text from a URL
POST /compliance/agent/compliance-check — unified check for all documents
GET  /compliance/agent/compliance-check/{check_id} — poll status
"""

import asyncio
import logging
import os
import re
import uuid as _uuid
from dataclasses import asdict
from datetime import datetime, timezone

import httpx
from fastapi import APIRouter
from pydantic import BaseModel

from compliance.services.smtp_sender import send_email

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/compliance/agent", tags=["agent"])

CONSENT_TESTER_URL = "http://bp-compliance-consent-tester:8094"

# In-memory job store (same pattern as doc-check)
_compliance_check_jobs: dict[str, dict] = {}


# ── Models ───────────────────────────────────────────────────────────

class ExtractTextRequest(BaseModel):
    url: str


class DocumentInput(BaseModel):
    doc_type: str  # dse, agb, impressum, cookie, widerruf, avv, loeschkonzept, etc.
    url: str = ""
    text: str = ""  # text has priority over URL


class ComplianceCheckRequest(BaseModel):
    documents: list[DocumentInput]
    use_agent: bool = False
    recipient: str = "dsb@breakpilot.local"


class ComplianceCheckStartResponse(BaseModel):
    check_id: str
    status: str = "running"


class ComplianceCheckStatusResponse(BaseModel):
    check_id: str
    status: str
    progress: str = ""
    progress_pct: int = 0
    result: dict | None = None
    error: str = ""


# ── Extract text endpoint ────────────────────────────────────────────

@router.post("/extract-text")
async def extract_text(req: ExtractTextRequest):
    """Extract text from a URL via consent-tester DSI discovery.

    Merges all documents found on the page (sub-pages, accordions, etc.)
    """
    try:
        async with httpx.AsyncClient(timeout=300.0) as client:
            resp = await client.post(
                f"{CONSENT_TESTER_URL}/dsi-discovery",
                json={"url": req.url, "max_documents": 5},
                timeout=300.0,
            )
            if resp.status_code != 200:
                return {
                    "text": "", "word_count": 0, "title": "",
                    "error": f"HTTP {resp.status_code} von Consent-Tester",
                }

            data = resp.json()
            docs = data.get("documents", [])

            if not docs:
                return {
                    "text": "", "word_count": 0, "title": "",
                    "error": "Kein Text extrahierbar",
                }

            # Merge all documents (handles multi-page DSIs like BMW)
            texts = []
            for doc in docs:
                t = doc.get("full_text", "") or doc.get("text_preview", "") or ""
                if t and len(t) > 50:
                    texts.append(t)
            text = "\n\n".join(texts) if texts else ""
            title = docs[0].get("title", "") or docs[0].get("doc_type", "")
            word_count = len(text.split())

            return {
                "text": text,
                "word_count": word_count,
                "title": title,
                "error": "",
            }

    except Exception as e:
        logger.warning("extract-text failed for %s: %s", req.url, e)
        return {
            "text": "", "word_count": 0, "title": "",
            "error": str(e)[:200],
        }


# ── Unified compliance check ────────────────────────────────────────

@router.post("/compliance-check")
async def start_compliance_check(req: ComplianceCheckRequest):
    """Start async compliance check for all documents."""
    check_id = str(_uuid.uuid4())[:8]
    _compliance_check_jobs[check_id] = {
        "status": "running",
        "progress": "Pruefung gestartet...",
        "progress_pct": 0,
        "result": None,
        "error": "",
    }
    asyncio.create_task(_run_compliance_check(check_id, req))
    return ComplianceCheckStartResponse(check_id=check_id, status="running")


@router.get("/compliance-check/{check_id}")
async def get_compliance_check_status(check_id: str):
    """Poll compliance check status."""
    job = _compliance_check_jobs.get(check_id)
    if not job:
        return {"check_id": check_id, "status": "not_found"}
    return ComplianceCheckStatusResponse(
        check_id=check_id,
        status=job["status"],
        progress=job.get("progress", ""),
        progress_pct=job.get("progress_pct", 0),
        result=job.get("result"),
        error=job.get("error", ""),
    )


async def _run_compliance_check(check_id: str, req: ComplianceCheckRequest):
    """Background task: check all documents with business-profile context."""
    try:
        from compliance.services.business_profiler import detect_business_profile
        from compliance.services.doc_checks.runner import check_document_completeness
        from compliance.services.rag_document_checker import check_document_with_controls
        from .agent_doc_check_routes import CheckItem, DocCheckResult
        from .agent_doc_check_report import build_html_report

        # Step 1: Resolve texts (fetch from URL if needed) — 0-30%
        _update(check_id, "Texte werden geladen...", 1)
        doc_texts: dict[str, str] = {}
        doc_entries: list[dict] = []

        # Cache fetched URLs to detect duplicates
        url_text_cache: dict[str, str] = {}

        n_docs = max(1, len(req.documents))
        for i, doc in enumerate(req.documents):
            pct = int(1 + (i / n_docs) * 29)
            _update(check_id, f"Texte laden {i+1}/{n_docs}: {doc.doc_type}...", pct)
            text = doc.text
            cmp_payloads: list[dict] = []
            if not text and doc.url:
                url_key = doc.url.strip().rstrip("/").lower()
                if url_key in url_text_cache:
                    text = url_text_cache[url_key]
                else:
                    text, cmp_payloads = await _fetch_text(doc.url, doc_type=doc.doc_type)
                    if text:
                        url_text_cache[url_key] = text
            if text:
                doc_texts[doc.doc_type] = text
            doc_entries.append({
                "doc_type": doc.doc_type,
                "url": doc.url,
                "text": text,
                "word_count": len(text.split()) if text else 0,
                "auto_discovered": False,
                "discovery_attempted": False,
                "cmp_payloads": cmp_payloads,
            })

        # Step 1a-bis: AUTO-DISCOVERY. For each canonical doc_type the user
        # did NOT submit a URL/text for, try to find it on the homepage of
        # the submitted URLs. This bridges the gap between "user knows the
        # exact URL" (rare) and "user pasted the homepage" (common).
        await _autodiscover_missing(
            check_id, doc_entries, doc_texts, url_text_cache,
        )

        # Step 1b: Section splitting — two cases:
        # 1. Same URL used for multiple doc_types → split by heading
        # 2. DSI text contains Cookie/Social-Media sections → auto-fill empty rows
        from compliance.services.section_splitter import (
            split_shared_texts, auto_fill_from_dsi, cross_search_documents,
        )
        split_shared_texts(doc_entries, url_text_cache)
        auto_fill_from_dsi(doc_entries)

        # Step 1c: Cross-document search — find doc_types in wrong documents (30-35%)
        _update(check_id, "Dokumente werden uebergreifend durchsucht...", 32)
        placement_findings = cross_search_documents(doc_entries)

        # Refresh doc_texts after all splitting/searching
        for entry in doc_entries:
            if entry.get("text"):
                doc_texts[entry["doc_type"]] = entry["text"]

        # Step 2: Detect business profile (35-40%)
        _update(check_id, "Geschaeftsmodell wird erkannt...", 37)
        profile = await detect_business_profile(doc_texts)
        profile_dict = asdict(profile)

        # Step 3: Check each document
        results: list[DocCheckResult] = []
        total_findings = 0
        use_agent_flag = req.use_agent or os.getenv(
            "COMPLIANCE_USE_AGENT", "false"
        ).lower() == "true"

        # Filter out doc_types that don't apply to this business profile
        skip_types = _get_skip_types(profile)

        # Document checks: 40-80%
        n_entries = max(1, len(doc_entries))
        for i, entry in enumerate(doc_entries):
            text = entry["text"]
            doc_type = entry["doc_type"]
            label = _doc_type_label(doc_type)
            url = entry["url"]

            if doc_type in skip_types:
                results.append(DocCheckResult(
                    label=label, url=url, doc_type=doc_type,
                    error=skip_types[doc_type],
                ))
                continue

            pct = int(40 + (i / n_entries) * 40)
            _update(check_id, f"Pruefen {i+1}/{n_entries}: {label}...", pct)

            if not text or len(text) < 50:
                # Empty entry — either from auto-discovery padding (no URL
                # to fetch) or from a fetch that returned nothing. If there
                # was a URL we keep the error so the user knows the fetch
                # failed; otherwise let the padding step label it
                # 'Nicht eingereicht' / 'Auf der Website nicht gefunden'.
                if (entry.get("url") or "").strip():
                    results.append(DocCheckResult(
                        label=label, url=url, doc_type=doc_type,
                        error="Kein Text vorhanden oder zu kurz",
                    ))
                continue

            result = await _check_single(
                text, doc_type, label, url,
                entry["word_count"], use_agent_flag,
            )

            # Apply profile context filter
            result = _apply_profile_filter(result, profile, doc_type)

            # Add placement findings — but only if the regex checks confirm
            # the text doesn't match. If completeness >= 50%, the text IS the
            # right doc_type despite missing cross-search keywords.
            if result.completeness_pct < 50:
                for pf in placement_findings:
                    if pf.get("doc_type") == doc_type:
                        result.checks.insert(0, CheckItem(**{
                            k: v for k, v in pf.items() if k != "doc_type"
                        }))

            results.append(result)
            total_findings += result.findings_count

        # Step 3b: Banner-Check (automatic, uses first URL or homepage)
        banner_result = None
        banner_url = req.documents[0].url if req.documents and req.documents[0].url else ""
        # Use the homepage (strip path) for banner check
        if banner_url:
            from urllib.parse import urlparse
            parsed = urlparse(banner_url)
            banner_url = f"{parsed.scheme}://{parsed.netloc}"
        if banner_url:
            _update(check_id, "Cookie-Banner wird geprueft...", 82)
            try:
                async with httpx.AsyncClient(timeout=120.0) as client:
                    resp = await client.post(
                        f"{CONSENT_TESTER_URL}/scan",
                        json={"url": banner_url, "timeout_per_phase": 10},
                    )
                    if resp.status_code == 200:
                        banner_result = resp.json()
            except Exception as e:
                logger.warning("Banner check failed: %s", e)

        # Step 3c: Cross-check Banner vs Cookie-Richtlinie (88-90%)
        if banner_result and "cookie" in doc_texts:
            _update(check_id, "Banner vs. Cookie-Richtlinie abgleichen...", 89)
            cross_findings = _cross_check_banner_vs_cookie(
                banner_result, doc_texts["cookie"],
            )
            if cross_findings:
                for r in results:
                    if r.doc_type == "cookie":
                        for cf in cross_findings:
                            r.checks.append(CheckItem(**cf))
                        l2 = [c for c in r.checks if c.level == 2 and not c.skipped]
                        l2p = sum(1 for c in l2 if c.passed)
                        r.correctness_pct = round(l2p / len(l2) * 100) if l2 else 0

        # Step 3d: TCF Vendor cross-check against DSI
        tcf_vendors = banner_result.get("tcf_vendors", []) if banner_result else []
        vvt_entries: list[dict] = []
        if tcf_vendors and "dse" in doc_texts:
            _update(check_id, f"{len(tcf_vendors)} TCF-Verarbeiter vs. DSI abgleichen...", 91)
            from compliance.services.banner_cookie_cross_check import cross_check_vendors_vs_dsi
            from compliance.services.vendor_vvt_mapper import map_vendors_to_vvt
            vendor_findings = cross_check_vendors_vs_dsi(tcf_vendors, doc_texts["dse"])
            if vendor_findings:
                for r in results:
                    if r.doc_type == "dse":
                        for vf in vendor_findings:
                            r.checks.append(CheckItem(**vf))
            vvt_entries = map_vendors_to_vvt(tcf_vendors)

        # Step 4: Extract profile hints from documents (92-95%)
        _update(check_id, "Profil wird aus Dokumenten extrahiert...", 93)
        from compliance.services.profile_extractor import extract_profile_from_documents
        extracted_profile = extract_profile_from_documents(doc_texts, profile_dict)

        # Step 4b: Determine scenario per document
        for r in results:
            if r.error:
                r.scenario = "skip"
            elif r.completeness_pct < 30:
                r.scenario = "regenerate"
            elif r.completeness_pct < 95:
                r.scenario = "fix"
            else:
                r.scenario = "import"

        # Step 4c: Always render all 8 canonical doc types. Missing types
        # are differentiated:
        #   - Discovery was tried but found nothing -> 'Auf der Website
        #     nicht gefunden' (suggest user provides URL manually)
        #   - No submitted URLs at all -> 'Nicht eingereicht'
        attempted = {
            e["doc_type"] for e in doc_entries if e.get("discovery_attempted")
        }
        results = _pad_results_with_missing(results, discovery_attempted=attempted)

        # Step 5: Build report with management summary (95-98%)
        _update(check_id, "Report wird erstellt...", 96)
        from .agent_doc_check_report import (
            build_management_summary,
            build_scanned_urls_html,
            build_provider_list_html,
        )
        from .agent_doc_check_extras import build_vvt_table_html

        # Extract structured vendor records from any CMP payloads captured
        # for the cookie doc (BMW ePaaS, OneTrust, etc.), validate their
        # opt-out + privacy URLs concurrently, score each entry.
        cmp_vendors: list[dict] = []
        try:
            from compliance.services.vendor_extractor import (
                extract_vendors_from_payloads,
            )
            from compliance.services.cookie_link_validator import (
                validate_vendor_urls, score_vendors,
            )
            cookie_payloads = []
            cookie_text = ""
            for e in doc_entries:
                if e.get("doc_type") == "cookie":
                    if e.get("cmp_payloads"):
                        cookie_payloads.extend(e["cmp_payloads"])
                    if e.get("text"):
                        cookie_text = e["text"]
            # Site-owner derived from the submitted URLs — drives the
            # INTERNAL/GROUP_COMPANY classification of vendor records.
            owner_name = _company_name_from_url(doc_entries) or ""
            if cookie_payloads:
                cmp_vendors = extract_vendors_from_payloads(
                    cookie_payloads, owner_name=owner_name,
                )
            # V3 fallback: no named CMP captured but we have substantive
            # cookie text → ask Qwen/OVH to extract vendor list from the text.
            # Skip on very short text (likely navigation) to save LLM cost.
            if not cmp_vendors and cookie_text and len(cookie_text.split()) >= 500:
                from compliance.services.vendor_llm_extractor import (
                    extract_vendors_via_llm,
                )
                from compliance.services.vendor_classifier import classify
                _update(check_id, "Vendor-Liste per LLM extrahieren...", 94)
                cmp_vendors = await extract_vendors_via_llm(cookie_text)
                # LLM path doesn't run through extract_vendors_from_payloads,
                # so classify here.
                for v in cmp_vendors:
                    v["recipient_type"] = classify(
                        vendor_name=v.get("name", ""),
                        category=v.get("category", ""),
                        owner_name=owner_name,
                    )
            if cmp_vendors:
                logger.info("VVT: %d vendors extracted, validating links",
                            len(cmp_vendors))
                cmp_vendors = await validate_vendor_urls(cmp_vendors)
                cmp_vendors = score_vendors(cmp_vendors)
        except Exception as e:
            logger.warning("VVT vendor extraction skipped: %s", e)

        summary_html = build_management_summary(results)
        scanned_html = build_scanned_urls_html(doc_entries)
        providers_html = build_provider_list_html(banner_result, vvt_entries)
        vvt_html = build_vvt_table_html(cmp_vendors)

        # MC scorecard aggregated across ALL docs in this run (DSGVO/TDDDG/
        # BGB/...). Sits at the top so the GF sees the regulation-by-
        # regulation view before drilling into per-doc details.
        from compliance.services.mc_scorecard import build_scorecard
        from .agent_doc_check_scorecard import build_scorecard_html
        all_mc_checks: list[dict] = []
        for r in results:
            for c in r.checks:
                if c.id.startswith("mc-"):
                    all_mc_checks.append({
                        "id": c.id, "label": c.label, "passed": c.passed,
                        "severity": c.severity, "skipped": c.skipped,
                        "regulation": c.regulation,
                    })
        scorecard = build_scorecard(all_mc_checks) if all_mc_checks else {}
        # Trend: load previous scorecard for the same tenant + domain so the
        # email can show delta indicators (A6).
        prev_scorecard: dict | None = None
        if scorecard:
            try:
                from compliance.services.compliance_audit_log import (
                    list_runs_for_tenant,
                )
                tenant_id_for_trend = req.recipient or ""
                base_domain_for_trend = _extract_domain(doc_entries) or ""
                prev_runs = list_runs_for_tenant(
                    tenant_id_for_trend,
                    base_domain=base_domain_for_trend,
                    limit=1,
                )
                if prev_runs:
                    prev_scorecard = prev_runs[0].get("scorecard")
            except Exception as e:
                logger.debug("trend lookup skipped: %s", e)
        scorecard_html = (
            build_scorecard_html(scorecard, previous_scorecard=prev_scorecard)
            if scorecard else ""
        )

        report_html = build_html_report(results, None)
        profile_html = _build_profile_html(profile)
        full_html = (
            summary_html + scanned_html + profile_html + scorecard_html
            + providers_html + vvt_html + report_html
        )

        # Step 6: Send email — derive site name primarily from entered URL.
        # The extracted_profile.companyName is often noisy (e.g. picks up
        # juris.de from legal references). Domain-derived name is more
        # predictable for the GF email subject.
        doc_count = len([r for r in results if not r.error])
        url_company = _company_name_from_url(doc_entries)
        domain = _extract_domain(doc_entries)
        site_name = url_company or domain or "Unbekannt"
        _update(check_id, "E-Mail wird versendet...", 98)
        email_result = send_email(
            recipient=req.recipient,
            subject=f"[COMPLIANCE-CHECK] {site_name} — {doc_count} Dokumente geprueft",
            body_html=full_html,
        )

        # Step 7: Store result
        response = {
            "check_id": check_id,
            "results": [_result_to_dict(r) for r in results],
            "business_profile": profile_dict,
            "extracted_profile": extracted_profile,
            "banner_result": {
                "detected": banner_result.get("banner_detected", False) if banner_result else False,
                "provider": banner_result.get("banner_provider", "") if banner_result else "",
                "violations": len(banner_result.get("banner_checks", {}).get("violations", [])) if banner_result else 0,
                "tcf_vendor_count": len(tcf_vendors),
            } if banner_result else None,
            "tcf_vendors": vvt_entries if tcf_vendors else [],
            "cmp_vendors": cmp_vendors,
            "total_documents": len(results),
            "total_findings": total_findings,
            "email_status": email_result.get("status", "failed"),
            "checked_at": datetime.now(timezone.utc).isoformat(),
        }

        _compliance_check_jobs[check_id]["status"] = "completed"
        _compliance_check_jobs[check_id]["result"] = response
        _compliance_check_jobs[check_id]["progress"] = "Fertig"
        _compliance_check_jobs[check_id]["progress_pct"] = 100

        # Persist to sidecar SQLite audit log — enables /audit endpoints
        # (A5 admin tab) and trend view (A6). Best-effort; failures here
        # do not affect the user-facing response.
        try:
            from compliance.services.compliance_audit_log import record_check_run
            from compliance.services.mc_scorecard import full_audit_records
            audit_rows: list[dict] = []
            for r in results:
                doc_mc = [c for c in r.checks if c.id.startswith("mc-")]
                audit_rows.extend(full_audit_records(
                    [{"id": c.id, "label": c.label, "passed": c.passed,
                      "severity": c.severity, "skipped": c.skipped,
                      "regulation": c.regulation, "matched_text": c.matched_text,
                      "hint": c.hint, "level": c.level}
                     for c in doc_mc],
                    check_id=check_id,
                    doc_type=r.doc_type,
                ))
            record_check_run(
                check_id=check_id,
                tenant_id=req.recipient or "",
                site_name=site_name,
                base_domain=domain or "",
                doc_count=doc_count,
                scorecard=scorecard,
                vvt_summary={
                    "total": len(cmp_vendors),
                    "internal": sum(1 for v in cmp_vendors
                                    if (v.get("recipient_type") or "").upper()
                                    in ("INTERNAL", "GROUP_COMPANY")),
                    "external": sum(1 for v in cmp_vendors
                                    if (v.get("recipient_type") or "").upper()
                                    in ("PROCESSOR", "CONTROLLER")),
                },
                mc_records=audit_rows,
            )
            from compliance.services.compliance_audit_log import record_check_payload
            record_check_payload(
                check_id=check_id,
                vendors=cmp_vendors,
                profile=extracted_profile,
            )
        except Exception as e:
            logger.warning("Audit persistence skipped: %s", e)

    except Exception as e:
        logger.error("Compliance check %s failed: %s", check_id, e, exc_info=True)
        _compliance_check_jobs[check_id]["status"] = "failed"
        _compliance_check_jobs[check_id]["error"] = str(e)[:500]


def _update(check_id: str, msg: str, pct: int | None = None):
    job = _compliance_check_jobs[check_id]
    job["progress"] = msg
    if pct is not None:
        job["progress_pct"] = max(0, min(100, int(pct)))


async def _fetch_text(url: str, doc_type: str = "") -> tuple[str, list[dict]]:
    """Fetch text from URL via consent-tester, with HTTP fallback.

    Returns (text, cmp_payloads). cmp_payloads is the raw CMP JSON captured
    during navigation (ePaaS, OneTrust, …) — empty when no CMP fired or
    HTTP fallback was used. Backend turns payloads into structured vendor
    records for the VVT table in the email.
    """
    # 1. Consent-tester (Playwright-based, full JS rendering).
    # max_documents depends on doc_type:
    #   - cookie/dse/social_media: self-extract (often + CMP capture) is
    #     authoritative, sub-pages dilute the policy text. max=1.
    #   - impressum/agb/widerruf/nutzungsbedingungen/dsb: BMW & similar
    #     enterprise sites split this across 3-4 short sub-pages
    #     (Versicherungsvermittler, Aufsicht, Berufsrecht). max=3 follows
    #     them. The 15s networkidle bail (dsi_helpers) keeps timing safe.
    short_extract_types = {"cookie", "dse", "datenschutz", "privacy", "social_media"}
    max_docs = 1 if (doc_type or "") in short_extract_types else 3
    try:
        async with httpx.AsyncClient(timeout=120.0) as client:
            resp = await client.post(
                f"{CONSENT_TESTER_URL}/dsi-discovery",
                json={"url": url, "max_documents": max_docs},
                timeout=120.0,
            )
            if resp.status_code == 200:
                payload = resp.json()
                docs = payload.get("documents", [])
                cmp_payloads = payload.get("cmp_payloads") or []
                if docs:
                    texts = []
                    for doc in docs:
                        t = doc.get("full_text", "") or doc.get("text_preview", "") or ""
                        if t and len(t) > 50:
                            texts.append(t)
                    merged = "\n\n".join(texts)
                    if merged and len(merged.split()) > 100:
                        if len(texts) > 1:
                            logger.info("Merged %d docs from %s (%d words)",
                                        len(texts), url, len(merged.split()))
                        return merged, cmp_payloads
    except Exception as e:
        logger.warning("Consent-tester fetch failed for %s: %s", url, e)

    # 2. Fallback: direct HTTP fetch (works for SSR pages like BMW)
    try:
        import re as _re
        async with httpx.AsyncClient(timeout=30.0, follow_redirects=True) as client:
            resp = await client.get(url)
            if resp.status_code == 200 and "text/html" in resp.headers.get("content-type", ""):
                html = resp.text
                # Strip HTML tags, decode entities
                text = _re.sub(r"<script[^>]*>.*?</script>", " ", html, flags=_re.DOTALL | _re.IGNORECASE)
                text = _re.sub(r"<style[^>]*>.*?</style>", " ", text, flags=_re.DOTALL | _re.IGNORECASE)
                text = _re.sub(r"<[^>]+>", " ", text)
                text = _re.sub(r"\s+", " ", text).strip()
                if len(text.split()) > 100:
                    logger.info("HTTP fallback for %s: %d words", url, len(text.split()))
                    return text, []
    except Exception as e:
        logger.warning("HTTP fallback failed for %s: %s", url, e)

    return "", []


async def _autodiscover_missing(
    check_id: str,
    doc_entries: list[dict],
    doc_texts: dict[str, str],
    url_text_cache: dict[str, str],
) -> None:
    """For each canonical doc_type the user did not submit, try to find
    the corresponding document on the homepage of the site they DID submit.

    Modifies doc_entries in place: fills text/url/word_count and sets
    `auto_discovered=True`. Marks `discovery_attempted=True` on every
    missing entry (even when nothing was found) so the report can
    distinguish 'Nicht eingereicht' from 'Auf der Website nicht gefunden'.
    """
    from urllib.parse import urlparse

    # Submitted doc_types (those the user actually entered URL or text for).
    submitted_types = {
        e["doc_type"] for e in doc_entries
        if e.get("text") or (e.get("url") or "").strip()
    }
    # Map alias types to canonical
    submitted_canon = {
        "dse" if t in ("datenschutz", "privacy") else t for t in submitted_types
    }
    # Missing = canonical types the user did NOT submit
    missing = set(_ALL_DOC_TYPES) - submitted_canon
    if not missing:
        return

    # Pick the most common base (scheme://netloc) from submitted URLs.
    bases: dict[str, int] = {}
    for e in doc_entries:
        u = (e.get("url") or "").strip()
        if u and "://" in u:
            p = urlparse(u)
            base = f"{p.scheme}://{p.netloc}"
            bases[base] = bases.get(base, 0) + 1
    if not bases:
        # No submitted URL at all — nothing to crawl from. Add empty
        # placeholders (with discovery_attempted=False) so the padding
        # step renders them as 'Nicht eingereicht' (not 'Nicht gefunden').
        for dt in missing:
            doc_entries.append({
                "doc_type": dt, "url": "", "text": "", "word_count": 0,
                "auto_discovered": False, "discovery_attempted": False,
            })
        return

    # Build crawl plan: primary base + any related domains mentioned in
    # the submitted texts that share the owner's SLD. Example: BMW Group
    # text mentions bmwgroup.com and bmwgroup.jobs in addition to bmw.de.
    primary_base = max(bases, key=bases.get) + "/"
    crawl_bases: list[str] = [primary_base]
    primary_netloc = urlparse(primary_base).netloc.lower().lstrip("www.")
    owner_token = primary_netloc.split(".")[0]  # 'bmw'

    if owner_token and len(owner_token) >= 3:
        domain_re = re.compile(
            r"https?://([a-z0-9][a-z0-9\-]*\.)*" + re.escape(owner_token)
            + r"[a-z0-9\-]*\.[a-z]{2,}",
            re.IGNORECASE,
        )
        seen_bases = {primary_base}
        for entry in doc_entries:
            text = entry.get("text") or ""
            for m in domain_re.finditer(text):
                p = urlparse(m.group(0))
                base = f"{p.scheme}://{p.netloc}/"
                base_netloc = p.netloc.lower().lstrip("www.")
                if base_netloc == primary_netloc:
                    continue
                if base in seen_bases:
                    continue
                seen_bases.add(base)
                crawl_bases.append(base)
                if len(crawl_bases) >= 3:
                    break
            if len(crawl_bases) >= 3:
                break

    _update(
        check_id,
        f"Suche fehlende Dokumente auf {', '.join(urlparse(b).netloc for b in crawl_bases)}...",
        18,
    )

    discovered: list[dict] = []
    disc_payloads: list[dict] = []
    for base in crawl_bases:
        try:
            async with httpx.AsyncClient(timeout=180.0) as client:
                resp = await client.post(
                    f"{CONSENT_TESTER_URL}/dsi-discovery",
                    json={"url": base, "max_documents": 15},
                    timeout=180.0,
                )
                if resp.status_code != 200:
                    logger.warning("auto-discovery: HTTP %d for %s",
                                   resp.status_code, base)
                    continue
                body = resp.json()
                discovered.extend(body.get("documents", []) or [])
                disc_payloads.extend(body.get("cmp_payloads") or [])
                logger.info("auto-discovery on %s: %d docs",
                            base, len(body.get("documents", []) or []))
        except Exception as e:
            logger.warning("auto-discovery failed for %s: %s", base, e)

    # Classify each discovered doc into a canonical doc_type
    by_type: dict[str, dict] = {}
    for d in discovered:
        title = (d.get("title") or "").lower()
        url = (d.get("url") or "").lower()
        wc = d.get("word_count") or 0
        if wc < 100:
            continue
        canon = _classify_discovered_doc(title, url)
        if canon and canon in missing and canon not in by_type:
            by_type[canon] = d

    # Append a new entry for every missing canonical type. Auto-discovered
    # ones get the text/URL filled; ungratched ones stay empty so the
    # padding step renders them as 'Auf der Website nicht gefunden'.
    filled = 0
    for dt in missing:
        new_entry: dict = {
            "doc_type": dt, "url": "", "text": "", "word_count": 0,
            "auto_discovered": False, "discovery_attempted": True,
            "cmp_payloads": [],
        }
        d = by_type.get(dt)
        if d:
            full = d.get("full_text") or d.get("text_preview") or ""
            if len(full.split()) >= 100:
                new_entry["text"] = full
                new_entry["url"] = d.get("url", "")
                new_entry["word_count"] = len(full.split())
                new_entry["auto_discovered"] = True
                # Auto-discovery happens on the HOMEPAGE — any CMP payload
                # captured at that level likely belongs to the cookie page
                # (CMP widget loaded site-wide). Attach to 'cookie' entry.
                if dt == "cookie" and disc_payloads:
                    new_entry["cmp_payloads"] = disc_payloads
                doc_texts[dt] = full
                filled += 1
                logger.info(
                    "auto-discovered %s on %s: %s (%d words)",
                    dt, base, d.get("url", "")[:80], new_entry["word_count"],
                )
        doc_entries.append(new_entry)

    logger.info(
        "auto-discovery: filled %d/%d missing types from %s",
        filled, len(missing), base,
    )


# Title/URL keywords → canonical doc_type. Order matters: most-specific first.
_DISCOVERY_RULES: list[tuple[str, tuple[str, ...]]] = [
    ("cookie",            ("cookie", "kuche", "biscuit", "cookies-")),
    ("widerruf",          ("widerruf", "rueckgabe", "rückgabe", "cancellation",
                           "right-of-withdrawal", "ruecktritts", "rücktritts")),
    ("social_media",      ("social-media", "soziale-medien", "social_media",
                           "social-media-policy")),
    ("agb",               ("/agb", "geschaeftsbedingungen", "geschäftsbedingungen",
                           "terms-and-conditions", "general-terms")),
    ("nutzungsbedingungen", ("nutzungsbedingung", "terms-of-use",
                              "nutzungsordnung", "terms-of-service")),
    ("dsb",               ("datenschutzbeauftragt", "data-protection-officer",
                           "dpo-contact", "/dsb")),
    ("impressum",         ("impressum", "imprint", "legal-notice", "site-notice",
                           "anbieterkennzeichnung", "legal-disclaimer-pool")),
    ("dse",               ("data-privacy", "datenschutz", "data-protection",
                           "privacy-policy", "privacy-notice", "dsgvo",
                           "data_privacy", "datenschutzinformation")),
]


def _classify_discovered_doc(title: str, url: str) -> str | None:
    """Map a discovered doc (by its title + URL) to one of our 8 canonical types."""
    haystack = f"{title} {url}"
    for canon, keywords in _DISCOVERY_RULES:
        if any(kw in haystack for kw in keywords):
            return canon
    return None


async def _check_single(
    text: str, doc_type: str, label: str, url: str,
    word_count: int, use_agent: bool,
):
    """Run regex + MC checks on a single document."""
    from compliance.services.doc_checks.runner import check_document_completeness
    from compliance.services.rag_document_checker import check_document_with_controls
    from .agent_doc_check_routes import CheckItem, DocCheckResult

    # Regex checklist
    findings = check_document_completeness(text, doc_type, label, url)

    all_checks: list[CheckItem] = []
    completeness = 0
    correctness = 0

    for f in findings:
        if "SCORE" in f.get("code", ""):
            for c in f.get("all_checks", []):
                all_checks.append(CheckItem(
                    id=c["id"], label=c["label"], passed=c["passed"],
                    severity=c["severity"], matched_text=c.get("matched_text", ""),
                    level=c.get("level", 1), parent=c.get("parent"),
                    skipped=c.get("skipped", False), hint=c.get("hint", ""),
                ))
            completeness = f.get("completeness_pct", 0)
            correctness = f.get("correctness_pct", 0)

    # Master Control checks (top 20 by severity to avoid noise)
    try:
        # max_controls=0 -> evaluate ALL MCs for this doc_type (DB has
        # 1874 across 8 types; regex matching is cheap and dominates
        # well under 1s per doc). Caps remain on the LLM-enrich step
        # (top-10 FAILs) so cost stays bounded.
        mc_results = await check_document_with_controls(
            text, doc_type, label, max_controls=0, use_agent=use_agent,
        )
        if mc_results:
            for mc in mc_results:
                all_checks.append(CheckItem(**mc))
            l2 = [c for c in all_checks if c.level == 2 and not c.skipped]
            l2_passed = sum(1 for c in l2 if c.passed)
            correctness = round(l2_passed / len(l2) * 100) if l2 else 0
    except Exception as e:
        logger.warning("MC check skipped for %s: %s", label, e)

    # LLM verification of regex fails
    failed = [c for c in all_checks if not c.passed and not c.skipped and c.hint]
    if failed:
        try:
            from compliance.services.doc_checks.llm_verify import verify_failed_checks
            overturns = await verify_failed_checks(
                text,
                [{"id": c.id, "label": c.label, "hint": c.hint} for c in failed],
                label,
            )
            for c in all_checks:
                if c.id in overturns and overturns[c.id]["overturned"]:
                    c.passed = True
                    c.matched_text = f"[LLM] {overturns[c.id]['evidence']}"
            l2_active = [c for c in all_checks if c.level == 2 and not c.skipped]
            l2_passed = sum(1 for c in l2_active if c.passed)
            if l2_active:
                correctness = round(l2_passed / len(l2_active) * 100)
        except Exception as e:
            logger.warning("LLM verification skipped: %s", e)

    # Cookie-policy only: actively HTTP-probe the Opt-Out + Privacy-Policy
    # URLs the document advertises. Broken links make individual provider
    # entries non-compliant under Art. 7(3) DSGVO.
    if doc_type == "cookie":
        try:
            from compliance.services.cookie_link_validator import (
                extract_links, validate_links, build_check_items,
            )
            links = extract_links(text)
            if links:
                logger.info("Cookie-link validator: %d urls extracted from %s",
                            len(links), label)
                validated = await validate_links(links)
                for item in build_check_items(validated):
                    all_checks.append(CheckItem(**item))
                # Re-compute correctness with the new L2 items
                l2_active = [c for c in all_checks if c.level == 2 and not c.skipped]
                l2_passed = sum(1 for c in l2_active if c.passed)
                if l2_active:
                    correctness = round(l2_passed / len(l2_active) * 100)
        except Exception as e:
            logger.warning("Cookie-link validation skipped for %s: %s", label, e)

    non_score = [f for f in findings if "SCORE" not in f.get("code", "")]
    return DocCheckResult(
        label=label, url=url, doc_type=doc_type,
        word_count=word_count or len(text.split()),
        completeness_pct=completeness, correctness_pct=correctness,
        checks=all_checks, findings_count=len(non_score),
    )


def _pad_results_with_missing(
    results: list,
    discovery_attempted: set[str] | None = None,
) -> list:
    """Ensure every canonical doc_type has an entry in the results list.

    Doc_types the user did not submit AND auto-discovery did not find get
    a placeholder DocCheckResult. The error message distinguishes:
      - 'Auf der Website nicht gefunden' (discovery was attempted)
      - 'Nicht eingereicht' (no submitted URLs to crawl from)

    Preserves the canonical ordering from _ALL_DOC_TYPES so the report
    layout is stable.
    """
    from .agent_doc_check_routes import DocCheckResult
    attempted = discovery_attempted or set()

    by_type: dict[str, object] = {}
    for r in results:
        canon = "dse" if r.doc_type in ("datenschutz", "privacy") else r.doc_type
        by_type[canon] = r

    ordered: list = []
    for dt in _ALL_DOC_TYPES:
        if dt in by_type:
            ordered.append(by_type[dt])
            continue
        if dt in attempted:
            msg = ("Auf der Website nicht gefunden — bitte URL des "
                   "Dokuments manuell eintragen, falls vorhanden")
        else:
            msg = "Nicht eingereicht — Quelle nicht angegeben"
        ordered.append(DocCheckResult(
            label=_doc_type_label(dt),
            url="",
            doc_type=dt,
            word_count=0,
            completeness_pct=0,
            correctness_pct=0,
            checks=[],
            findings_count=0,
            error=msg,
            scenario="missing",
        ))

    extras = [r for r in results
              if (r.doc_type if r.doc_type not in ("datenschutz", "privacy") else "dse")
              not in _ALL_DOC_TYPES]
    ordered.extend(extras)
    return ordered


_COMPOUND_TLDS = {
    "co.uk", "co.jp", "co.nz", "co.kr", "co.za", "co.in",
    "com.au", "com.br", "com.mx", "com.tr", "com.sg",
}


def _extract_domain(doc_entries: list[dict]) -> str | None:
    """Extract base domain (without www) from first URL."""
    for entry in doc_entries:
        url = entry.get("url", "")
        if url and "://" in url:
            from urllib.parse import urlparse
            host = urlparse(url).netloc.lower()
            if host.startswith("www."):
                host = host[4:]
            return host or None
    return None


def _company_name_from_url(doc_entries: list[dict]) -> str | None:
    """Derive a display company name from the entered URLs.

    Heuristic: take the second-level domain (e.g. "bmw" from "www.bmw.de"),
    uppercase short acronyms (<=4 chars, no hyphens), title-case the rest.

    Examples:
      www.bmw.de              -> BMW
      mercedes-benz.de        -> Mercedes-Benz
      shop.example.co.uk      -> Example
      juris.de                -> Juris
    """
    from urllib.parse import urlparse

    for entry in doc_entries:
        url = entry.get("url", "")
        if not url or "://" not in url:
            continue
        host = urlparse(url).netloc.lower()
        if host.startswith("www."):
            host = host[4:]
        parts = host.split(".")
        if len(parts) < 2:
            continue
        # Handle compound TLDs (.co.uk etc.)
        if len(parts) >= 3 and ".".join(parts[-2:]) in _COMPOUND_TLDS:
            sld = parts[-3]
        else:
            sld = parts[-2]
        if not sld:
            continue
        if len(sld) <= 4 and "-" not in sld:
            return sld.upper()
        return "-".join(p.capitalize() for p in sld.split("-"))
    return None


def _get_skip_types(profile) -> dict[str, str]:
    """Doc_types to skip entirely. Currently empty — we check everything
    and flag irrelevant items as INFO instead of skipping."""
    return {}


def _apply_profile_filter(result, profile, doc_type: str):
    """Adjust INFO-level checks based on business profile context.

    For example: ODR check only relevant for B2C online shops.
    """
    from .agent_doc_check_routes import CheckItem

    for check in result.checks:
        cid = check.id.lower()

        # ODR/OS-Link: relevant ONLY for B2C online shops. The check's
        # default hint is written for B2B (it explains why it's not
        # relevant) — for B2C we must replace it with action-oriented
        # guidance, otherwise the report contradicts itself.
        if "odr" in cid or "os-link" in cid or "streitbeilegung" in check.label.lower():
            if profile.needs_odr:
                if not check.passed:
                    check.hint = (
                        "Als B2C-Anbieter muessen Sie nach Art. 14 EU-VO 524/2013 "
                        "auf die OS-Plattform (https://ec.europa.eu/consumers/odr) "
                        "verlinken — klickbarer Link, nicht nur Text. Zusaetzlich "
                        "§36 VSBG: angeben, ob Sie an Verbraucher-"
                        "Streitbeilegungsverfahren teilnehmen (oder nicht)."
                    )
            else:
                check.skipped = True
                check.hint = "Nicht relevant (kein B2C Online-Shop)"

        # Widerruf: Flag entire document as unnecessary for B2B
        if doc_type == "widerruf" and profile.business_type not in ("b2c", "unknown"):
            check.severity = "INFO"
            if not check.passed:
                check.hint = (
                    "Als B2B-Unternehmen benoetigen Sie keine Widerrufsbelehrung "
                    "(§355 BGB gilt nur fuer Verbrauchervertraege). "
                    "Empfehlung: Entfernen Sie die Widerrufsbelehrung von "
                    "Ihrer Website, da sie Verwirrung stiften kann."
                )

        # Regulated profession: check for Kammer info
        if "kammer" in cid or "berufsordnung" in check.label.lower():
            if not profile.is_regulated_profession:
                check.skipped = True
                check.hint = "Nicht relevant (kein regulierter Beruf)"

    return result


# ── Helpers ──────────────────────────────────────────────────────────

_DOC_TYPE_LABELS = {
    "dse": "Datenschutzerklaerung",
    "datenschutz": "Datenschutzerklaerung",
    "privacy": "Datenschutzerklaerung",
    "impressum": "Impressum",
    "agb": "AGB",
    "widerruf": "Widerrufsbelehrung",
    "cookie": "Cookie-Richtlinie",
    "avv": "Auftragsverarbeitung",
    "loeschkonzept": "Loeschkonzept",
    "dsfa": "Datenschutz-Folgenabschaetzung",
    "social_media": "Social Media Datenschutz",
    "nutzungsbedingungen": "Nutzungsbedingungen",
    "dsb": "DSB-Kontakt",
}

# Canonical doc types in the same order as the frontend ComplianceCheckTab.
# The route pads `results` to always contain an entry for each — even if
# the user did not submit a URL — so the email + frontend always show
# the complete checklist (missing rows marked as 'Nicht eingereicht').
#
# DSB-Kontakt is intentionally NOT canonical: per GDPR practice the DSB is
# named *inside* the DSI/datenschutz document (email or contact block), not
# as a separate page. We check 'DSB benannt' as a sub-check of the DSE
# instead. If a tenant insists on a separate DSB document, they can still
# submit one — it just won't appear as a missing checklist row.
_ALL_DOC_TYPES = [
    "dse", "impressum", "social_media", "cookie",
    "agb", "nutzungsbedingungen", "widerruf",
]


def _doc_type_label(doc_type: str) -> str:
    return _DOC_TYPE_LABELS.get(doc_type, doc_type.upper())


def _result_to_dict(r) -> dict:
    """Convert DocCheckResult to JSON-serializable dict."""
    fields = ("id", "label", "passed", "severity", "matched_text",
              "level", "parent", "skipped", "hint")
    return {
        "label": r.label, "url": r.url, "doc_type": r.doc_type,
        "word_count": r.word_count, "completeness_pct": r.completeness_pct,
        "correctness_pct": r.correctness_pct,
        "checks": [{f: getattr(c, f) for f in fields} for c in r.checks],
        "findings_count": r.findings_count, "error": r.error,
        "scenario": getattr(r, "scenario", ""),
    }


def _build_profile_html(profile) -> str:
    from .agent_doc_check_report import build_profile_html
    return build_profile_html(profile)


# Cross-check extracted to compliance.services.banner_cookie_cross_check
from compliance.services.banner_cookie_cross_check import cross_check_banner_vs_cookie as _cross_check_banner_vs_cookie


# ── Admin: audit drill-down (A5) + trend view (A6) ──────────────────

@router.get("/audit/{check_id}")
async def audit_drill_down(
    check_id: str,
    doc_type: str = "",
    regulation: str = "",
    only_failed: bool = False,
):
    """Return scorecard + filterable MC results for a single check run.

    Frontend uses this to render the /sdk/agent/audit/<check_id> view.
    """
    from compliance.services.compliance_audit_log import (
        get_check_run, list_mc_results,
    )
    run = get_check_run(check_id)
    if not run:
        return {"check_id": check_id, "found": False}
    rows = list_mc_results(
        check_id,
        doc_type=doc_type or None,
        regulation=regulation or None,
        only_failed=only_failed,
    )
    return {
        "check_id": check_id,
        "found": True,
        "run": run,
        "mc_count": len(rows),
        "results": rows,
    }


@router.get("/audit/tenant/{tenant_id}")
async def audit_tenant_history(
    tenant_id: str,
    base_domain: str = "",
    limit: int = 30,
):
    """Tenant-level history for the trend view (A6)."""
    from compliance.services.compliance_audit_log import list_runs_for_tenant
    runs = list_runs_for_tenant(
        tenant_id, base_domain=base_domain or None, limit=limit,
    )
    return {"tenant_id": tenant_id, "count": len(runs), "runs": runs}