"""Mail-V2 compose — single entrypoint that returns the full HTML.

Call `compose_v2(state)` from the email-dispatch phase when
`MAIL_RENDER_V2=true`. Default remains the legacy compose so we can
A/B in Mailpit.
"""

from __future__ import annotations

import os

from ._blocks import (
    render_attachments,
    render_caveats,
    render_header,
    render_per_doc,
    render_per_theme,
    render_sofortmassnahmen,
    render_toc,
)
from ._blocks_findings import (
    render_critical,
    render_internal_reminders,
    render_manual_review,
)
from ._legacy_wrappers import render_all_legacy
from ._style import page_close, page_open


def compose_v2(state: dict) -> str:
    """Build the full audit-mail HTML in the V2 layout."""
    site = state.get("site_name") or "—"
    parts = [
        page_open(site),
        render_header(state),
        render_toc(state),
        render_critical(state),
        render_manual_review(state),
        render_internal_reminders(state),
        render_sofortmassnahmen(state),
        render_per_doc(state),
        render_per_theme(state),
        # B4 — Cross-Doc Vendor-Consistency (Elli Vertex↔Iadvize pattern)
        state.get("vendor_consistency_html", ""),
        # B5 — AI-Act Art. 50 Transparenzpflicht
        state.get("ai_act_html", ""),
        # B6/B7/B8/B9/B10 — DPO + Staleness + CMP + MultiEntity + Transfer
        state.get("extra_findings_html", ""),
        # B12 Chatbot-Cookie-Klassifikation
        state.get("chatbot_cookie_html", ""),
        # B13 Widerrufsbelehrung-Reachability (B2C-Pflicht)
        state.get("widerruf_reach_html", ""),
        # B14 Widersprüchliche Speicherdauer im selben Doc
        state.get("retention_conflict_html", ""),
        # B15 AI-Act Rechtsgrundlage (LLM-Vendor auf lit. f)
        state.get("ai_legal_basis_html", ""),
        # B16 Footer-Label-vs-URL-Slug-Drift (SEO / Bookmarks)
        state.get("url_slug_drift_html", ""),
        # Browser-Matrix (Stage 1.c)
        state.get("browser_matrix_html", ""),
        # All legacy build_*_html() wrapped in V2 sections — preserves
        # every information block from the old renderer (Exec Summary,
        # Banner-Screenshot, VVT, Redundancy, Solutions, Diff, etc.)
        render_all_legacy(state),
        render_caveats(state),
        render_attachments(state),
        page_close(state.get("check_id", ""),
                   os.environ.get("BUILD_SHA", "unknown")),
    ]
    return "".join(p for p in parts if p)


def is_v2_enabled() -> bool:
    return os.environ.get("MAIL_RENDER_V2", "false").lower() in (
        "true", "1", "yes", "on",
    )