"""StandardIngester (Parser 4): ingests technical standards / control frameworks
(NIST / OWASP / BSI Grundschutz / CSA CCM) as best-practice CONTROLS — never a
primary obligation.

Tagged source_class=technical_standard / authority_weight=80 /
bindingness=best_practice / use_for_primary=false, so a standard ranks below
binding law AND supervisory guidance for an obligation/interpretation question,
but surfaces for "which controls / measures fit?" questions (control-intent in
the retriever). Reuses the PDF/HTML extraction helpers from guidance_ingester.

LICENSE per source matters: NIST = US public domain (free), OWASP = CC-BY-SA
(free, share-alike), BSI Grundschutz = check terms. CSA CCM is CC-BY-NC (NON
commercial) → NOT usable in a commercial product; carry the license on each unit
so the gate can refuse it.
"""

from __future__ import annotations

from dataclasses import dataclass
from typing import Any

from services.legal_act_ingester import UploadUnit

# Extraction (extract_pdf / extract_html / normalize_text) + the self_test gate are
# shared with guidance_ingester — the operational runner imports them from there.

STANDARD_WEIGHT = 80


@dataclass
class StandardSpec:
    """One technical standard / control framework document."""

    source_id: str  # stable handle, e.g. "nist_csf_2_0"
    short: str  # display handle / regulation_short, e.g. "NIST CSF 2.0"
    title: str
    publisher: str  # NIST / OWASP / BSI / CSA
    url: str
    license: str  # e.g. "public_domain" | "CC-BY-SA-4.0" | "CC-BY-NC" (→ commercial-blocked)
    collection: str = "bp_compliance_ce"
    version_date: str = ""
    jurisdiction: str = "international"


def standard_meta(spec: StandardSpec) -> dict[str, Any]:
    return {
        "regulation_code": spec.short,
        "regulation_short": spec.short,
        "regulation_name_de": spec.title,
        "citation_style": "standard",
        "document_type": "standard",
        "source_class": "technical_standard",
        "bindingness": "best_practice",
        "authority_level": STANDARD_WEIGHT,
        "authority_weight": STANDARD_WEIGHT,
        "source_type": "standard",
        "issuer": spec.publisher,
        "jurisdiction": spec.jurisdiction,
        "version_date": spec.version_date,
        "source": spec.url,
        "license": spec.license,
        "category": "standard",
        "use_for_primary": False,  # best-practice control — never a primary obligation
        "is_citable": True,
        "citation_unit": spec.title,
        "article_label": spec.short,
        "chunk_scope": "standard",
        "norm_id": f"STANDARD-{spec.source_id}",
    }


def build_upload_unit(spec: StandardSpec, text: str, run_tag: str) -> UploadUnit:
    """One UploadUnit for the whole standard; the RAG service chunks it and each
    chunk inherits the technical_standard metadata."""
    return UploadUnit(
        filename=f"{spec.source_id}.txt",
        text=text,
        meta=standard_meta(spec),
        document_version=f"{run_tag}-{spec.source_id}",
        collection=spec.collection,
    )