"""Publish sequence (PUBLISH-5/10/15/20/25/30/31/36/37/38/45/55/60).

Sequence (PUBLISH-5): validate ready set -> look up SKU (stop if exists) ->
refresh taxonomy if last sync >1h -> resolve cats/tags/attrs -> upload
processed PNGs -> POST /products -> finalize. SLAB-UAT-* always draft
(PUBLISH-10). Failure: mark failed, retain photos, write sync_log, plain
message (PUBLISH-30). Partial (media ok, product POST failed): orphan media
left, logged (PUBLISH-31).
"""
from __future__ import annotations

import os
import re
from datetime import datetime, timedelta, timezone
from typing import Any

from fastapi import APIRouter
from fastapi.responses import JSONResponse

from .db import get_connection
from .woo import (
    WooAuthError,
    WooClient,
    WooConnectionError,
    WooCredentialsMissing,
    WooError,
    WooForbiddenError,
)
from .review import _slab_dict, compute_ready

router = APIRouter(prefix="/api/v1/slabs")


def _error(code: str, message: str, detail: Any = None) -> dict:
    return {"error": {"code": code, "message": message, "detail": detail}}


def _now() -> str:
    return datetime.now(timezone.utc).replace(microsecond=0, tzinfo=None).isoformat()


def _is_uat(sku: str) -> bool:
    return sku.startswith("SLAB-UAT-")


def _slugify(name: str, sku: str) -> str:
    base = re.sub(r"[^a-z0-9]+", "-", name.lower()).strip("-")
    return f"{base}-{sku.lower()}"


def _taxonomy_stale(conn) -> bool:
    row = conn.execute("SELECT value FROM settings WHERE key='taxonomy_last_sync_at'").fetchone()
    if not row or not row[0]:
        return True
    try:
        last = datetime.fromisoformat(row[0])
    except ValueError:
        return True
    if last.tzinfo is None:
        last = last.replace(tzinfo=timezone.utc)
    return datetime.now(timezone.utc) - last > timedelta(hours=1)


def _attr_id_from_synced(attrs: dict, slug: str, name: str) -> int | None:
    """Match a locked attribute against the synced Woo set by slug, then name.

    METADATA-5 / QUALITY-105 — never hardcode live Woo attribute ids. Accepts
    both 'figure' and 'pa_figure' style slugs from Woo.
    """
    slug_l = slug.lower().lstrip()
    slug_alts = {slug_l, slug_l.removeprefix("pa_"), f"pa_{slug_l.removeprefix('pa_')}"}
    for a in attrs.values():
        if (a.get("slug") or "").lower() in slug_alts:
            return a["id"]
    name_l = name.lower()
    for a in attrs.values():
        if (a.get("name") or "").lower() == name_l:
            return a["id"]
    return None


def _build_payload(slab: dict, conn, status: str) -> dict:
    payload: dict[str, Any] = {
        "type": "simple",
        "status": status,
        "sku": slab["sku"],
        "name": slab["title"],
        "slug": _slugify(slab["title"], slab["sku"]),
        "regular_price": f"{slab['price']:.2f}",
        "description": slab["description"],
        "short_description": slab["short_description"],
        "virtual": False,
        "downloadable": False,
        "catalog_visibility": "visible",
        "sold_individually": True,
    }
    wood_cats = slab.get("wood_category_ids") or []
    payload["categories"] = [{"id": slab["species_id"]}] + [{"id": c} for c in wood_cats]
    tags = [t for t in (slab.get("fig_tag_ids") or [])] + [t for t in (slab.get("feat_tag_ids") or [])]
    if tags:
        payload["tags"] = [{"id": t} for t in tags]
    # Five locked attributes: resolve each attribute from the synced cache by
    # slug first, then case-insensitive name. Term *options* are always the
    # names of the selected synced terms.
    terms = {r["id"]: dict(r) for r in conn.execute("SELECT * FROM woo_attribute_terms").fetchall()}
    attrs = {r["id"]: dict(r) for r in conn.execute("SELECT * FROM woo_attributes").fetchall()}
    built_attrs = []
    for field, attr_slug, attr_name, pos in (
        ("edge_type_term_id", "edge-type", "Edge Type", 0),
        ("figure_term_ids", "pa_figure", "Figure", 1),
        ("grade_term_id", "pa_grade", "Grade", 2),
        ("thickness_term_id", "pa_thickness", "Thickness", 3),
        ("moisture_term_id", "pa_moisture", "Moisture", 4),
    ):
        raw = slab.get(field)
        term_ids = raw if isinstance(raw, list) else ([raw] if raw else [])
        options = [terms[t]["name"] for t in term_ids if t in terms]
        attr_id = _attr_id_from_synced(attrs, attr_slug, attr_name)
        if attr_id and options:
            built_attrs.append({"id": attr_id, "position": pos, "visible": True, "variation": False, "options": options})
    if built_attrs:
        payload["attributes"] = built_attrs
    return payload


def _classify(e: Exception) -> tuple[str, str, bool]:
    """Return (code, plain message, recoverable). PUBLISH-36/37/38."""
    if isinstance(e, WooCredentialsMissing):
        return "woo_unconfigured", "Woo is not configured. Set the store credentials in Settings.", False
    if isinstance(e, WooAuthError):
        return "woo_auth", "The store rejected the credentials. Check the app password.", False
    if isinstance(e, WooForbiddenError):
        # WAF / security plugin block — retrying the same request will not help.
        return (
            "woo_forbidden",
            "The store blocked this request (security filter). Check the store firewall or User-Agent allowlist — retrying will not help.",
            False,
        )
    if isinstance(e, WooConnectionError):
        return "woo_unreachable", "The store is unreachable right now. You can retry.", True
    return "woo_failed", "The store create failed. You can retry.", True


def _woo_creds(conn) -> tuple[str, str | None, str | None]:
    base = os.environ.get("WOO_BASE_URL", "")
    u = conn.execute("SELECT value FROM settings WHERE key='woo_wp_username'").fetchone()
    p = conn.execute("SELECT value_enc FROM settings WHERE key='woo_app_password'").fetchone()
    return base, (u[0] if u else None), (p[0] if p else None)


def _create_status(conn) -> str:
    row = conn.execute("SELECT value FROM settings WHERE key='woo_create_status'").fetchone()
    return row[0] if row and row[0] else "draft"


def _log(conn, slab_id: str, woo_product_id: int | None, status: str, message: str) -> None:
    conn.execute(
        "INSERT INTO sync_log(slab_id, woo_product_id, status, payload_hash, message, created_at) VALUES (?,?,?,?,?,?)",
        (slab_id, woo_product_id, status, None, message, _now()),
    )


@router.post("/{slab_id}/publish")
async def publish(slab_id: str) -> dict:
    conn = get_connection()
    row = conn.execute("SELECT * FROM slabs WHERE id=? AND deleted_at IS NULL", (slab_id,)).fetchone()
    if row is None:
        return JSONResponse(status_code=404, content=_error("not_found", "Slab not found"))
    slab = _slab_dict(row)
    # 1. Ready set (PUBLISH-5)
    ready, missing = compute_ready(slab)
    if not ready:
        return JSONResponse(status_code=422, content=_error("unpublishable", "Slab is not ready", {"missing": missing}))
    # 2. SKU lookup (PUBLISH-15) — stop if it exists in the store.
    base, user, enc = _woo_creds(conn)
    try:
        client = WooClient.from_settings(base, user, enc)
    except WooCredentialsMissing as e:
        return JSONResponse(status_code=422, content=_error("woo_unconfigured", str(e)))
    try:
        existing = len(client.get_products_by_sku(slab["sku"])) > 0
    except WooError as e:
        code, msg, rec = _classify(e)
        _log(conn, slab_id, None, "failed", msg)
        conn.execute("UPDATE slabs SET status='failed', updated_at=? WHERE id=?", (_now(), slab_id))
        conn.commit()
        return JSONResponse(status_code=502, content=_error(code, msg, {"recoverable": rec}))
    if existing:
        _log(conn, slab_id, None, "failed", "SKU already exists in the store")
        return JSONResponse(status_code=409, content=_error("duplicate_sku", "SKU already exists", {"sku": slab["sku"]}))
    # 3. Refresh taxonomy if stale (SETTINGS-60).
    if _taxonomy_stale(conn):
        from . import taxonomy as taxonomy_mod

        try:
            taxonomy_mod.sync(client, conn)
        except WooError as e:
            code, msg, rec = _classify(e)
            return JSONResponse(status_code=502, content=_error(code, msg, {"recoverable": rec}))
    # 4/5. Upload processed PNGs, then POST product.
    # PUBLISH-45: Woo image order is the photos-ready lineup — clean calibration,
    # its dimension-overlay copy, then the remaining batch photos. The Review
    # photo strip stores the owner's keep order (leftmost = primary), so the
    # overlay (which can sit after a moved batch photo) is re-ordered here by
    # role rather than stored seq. Ties fall back to stored seq.
    status = "draft" if _is_uat(slab["sku"]) else _create_status(conn)
    photos = conn.execute(
        "SELECT id, processed_blob, role FROM slab_photos "
        "WHERE slab_id=? AND processed_blob IS NOT NULL "
        "ORDER BY CASE role WHEN 'calibration' THEN 0 WHEN 'overlay' THEN 1 ELSE 2 END, seq",
        (slab_id,),
    ).fetchall()
    uploaded_ids: list[int] = []
    try:
        for p in photos:
            uploaded_ids.append(client.upload_media(p["processed_blob"], f"{slab['sku']}-{p['id']}.png"))
        payload = _build_payload(slab, conn, status)
        if uploaded_ids:
            payload["images"] = [{"id": i} for i in uploaded_ids]
        woo_product_id = client.create_product(payload)
    except WooError as e:
        code, msg, rec = _classify(e)
        partial = bool(uploaded_ids)
        if partial:
            msg = f"{msg} The uploaded images were left in the store — remove them manually."
        _log(conn, slab_id, None, "failed", msg)
        conn.execute("UPDATE slabs SET status='failed', updated_at=? WHERE id=?", (_now(), slab_id))
        conn.commit()
        return JSONResponse(status_code=502, content=_error(code, msg, {"recoverable": rec, "partial_media": partial}))
    # 6. Finalize (PUBLISH-25): set woo_product_id, purge photos, discard local row.
    now = _now()
    conn.execute(
        "UPDATE slabs SET status='published', woo_product_id=?, published_at=?, updated_at=? WHERE id=?",
        (woo_product_id, now, now, slab_id),
    )
    conn.execute("UPDATE slab_photos SET original_blob=NULL, processed_blob=NULL WHERE slab_id=?", (slab_id,))
    _log(conn, slab_id, woo_product_id, "success", "published")
    conn.commit()
    return {
        "ok": True,
        "status": "published",
        "woo_product_id": woo_product_id,
        "draft": _is_uat(slab["sku"]),
    }