"""Retro-fix studio_id dla istniejących pornapp scen z aggregator-WordPress source'ów.

Cel: skleić orphan factories (porndish, xmoviesforyou, watchporn, hdporn92) z canonical
scenami w TPDB/StashDB. Te tube'y mają w tytule `[Studio]` lub `Studio – Perf – Title`
ale `studios.name` jest ustawione na nazwę source'a (`PornDish`, `Watch.Porn`).

Pipeline per scena:
1. Parse `[Studio]` lub `Studio – ...` z `scene.title`
2. Lookup canonical studio w `studios` table (po slugify name match — czas też
   prosty substring fallback)
3. Jeśli match → update scene.studio_id (commit per-batch)
4. Po update, scena MAY auto-merge przy następnym ingest run gdy resolver path 4
   blocking po studio+date znajdzie kandydatów

**Usage:**
    docker compose exec -T worker python scripts/studio_retrofix.py --dry-run
    docker compose exec -T worker python scripts/studio_retrofix.py --commit

**ETA:** ~10 min dla ~67k scen (porndish 4.5k + xmoviesforyou 1.8k + watchporn 4k +
hdporn92 31k = ~41k; reszta to słabo parsujące się). Read-only DB do dry-run.
"""
from __future__ import annotations

import argparse
import logging
import re
import sys

from sqlalchemy import text

from app.db import session_scope
from app.normalize.text import slugify
from app.resolve.studio_title_parser import parse_title

log = logging.getLogger("studio_retrofix")
logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s: %(message)s")

# Sitetagi z parseable title formats. Reszta pornapp scen (xhamster/xvideos/etc.)
# nie ma `[Studio]` w tytule.
TARGET_SITETAGS = ["porndishcom", "xmoviesforyoucom", "watchporn", "hdporn92com"]


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--commit", action="store_true", help="Zapisz zmiany (default: dry-run)")
    ap.add_argument("--limit", type=int, default=None, help="Limit scen (debug)")
    ap.add_argument("--sitetags", nargs="+", default=TARGET_SITETAGS)
    args = ap.parse_args()

    # Load studios index (slug → studio_id, name) once
    log.info("loading studios index...")
    with session_scope() as session:
        rows = session.execute(text("SELECT id, name FROM studios")).all()
        studio_by_slug: dict[str, tuple[str, str]] = {}
        for r in rows:
            sl = slugify(r.name)
            studio_by_slug[sl] = (str(r.id), r.name)
    log.info("  %d studios loaded", len(studio_by_slug))

    # Find candidate scenes per sitetag
    stats = {
        "scanned": 0,
        "no_parse": 0,
        "studio_no_canonical": 0,
        "already_correct": 0,
        "would_fix_studio": 0,
        "would_fix_date": 0,
        "fixed_studio": 0,
        "fixed_date": 0,
    }
    no_match_studios: dict[str, int] = {}  # parsed studio name → count

    for sitetag in args.sitetags:
        log.info("--- %s ---", sitetag)
        with session_scope() as session:
            rows = session.execute(
                text("""
                    SELECT sc.id, sc.title, sc.studio_id, sc.release_date, st.name AS curr_studio
                    FROM scene_external_refs ser
                    JOIN scenes sc ON sc.id = ser.scene_id
                    JOIN sources s ON s.id = ser.source_id
                    LEFT JOIN studios st ON st.id = sc.studio_id
                    WHERE s.name = 'tube-scraper'
                      AND ser.external_id LIKE :prefix
                    ORDER BY sc.id
                    LIMIT :lim
                """),
                {"prefix": f"{sitetag}:%", "lim": args.limit or 10_000_000},
            ).all()
        log.info("  candidates: %d scenes", len(rows))

        # Process in batches of 500
        BATCH = 500
        for i in range(0, len(rows), BATCH):
            batch = rows[i : i + BATCH]
            # (scene_id, studio_id_or_None, release_date_or_None)
            updates: list[tuple[str, str | None, str | None]] = []
            for row in batch:
                stats["scanned"] += 1
                parsed = parse_title(row.title)
                if parsed.studio is None:
                    stats["no_parse"] += 1
                    continue
                parsed_slug = slugify(parsed.studio)
                target = studio_by_slug.get(parsed_slug)
                if not target:
                    fallback = re.sub(r'(?:ll?|hd|xxx|com|tv|tube|video|videos)$', '',
                                       parsed_slug)
                    target = studio_by_slug.get(fallback) if fallback != parsed_slug else None
                if not target:
                    stats["studio_no_canonical"] += 1
                    no_match_studios[parsed.studio] = no_match_studios.get(parsed.studio, 0) + 1
                    continue
                target_id, target_name = target

                new_studio_id = None if str(row.studio_id) == target_id else target_id
                new_date = (
                    parsed.release_date.isoformat()
                    if parsed.release_date is not None and row.release_date is None
                    else None
                )

                if new_studio_id is None and new_date is None:
                    stats["already_correct"] += 1
                    continue
                if new_studio_id:
                    stats["would_fix_studio"] += 1
                if new_date:
                    stats["would_fix_date"] += 1
                updates.append((str(row.id), new_studio_id, new_date))

            if args.commit and updates:
                with session_scope() as session:
                    for scene_id, studio_id, rel_date in updates:
                        sets = []
                        params: dict = {"id": scene_id}
                        if studio_id:
                            sets.append("studio_id = :sid")
                            params["sid"] = studio_id
                            stats["fixed_studio"] += 1
                        if rel_date:
                            sets.append("release_date = :rd")
                            params["rd"] = rel_date
                            stats["fixed_date"] += 1
                        sets.append("updated_at = NOW()")
                        session.execute(
                            text(f"UPDATE scenes SET {', '.join(sets)} WHERE id = :id"),
                            params,
                        )
                log.info("  batch %d/%d: committed %d updates",
                         i // BATCH + 1, (len(rows) + BATCH - 1) // BATCH, len(updates))

    log.info("===== STATS =====")
    for k, v in stats.items():
        log.info("  %s: %d", k, v)

    # Top 30 unparsed studios (na case'y do dodania do studios table jak TPDB nie dostarczy)
    log.info("===== Top 30 parsed studios NOT in canonical (parse OK, lookup miss) =====")
    for studio, n in sorted(no_match_studios.items(), key=lambda x: -x[1])[:30]:
        log.info("  %s: %d scenes", studio, n)

    log.info("dry_run=%s. Use --commit to apply.", not args.commit)
    return 0


if __name__ == "__main__":
    sys.exit(main())