#!/usr/bin/env python3
"""Regenerate all thumbnails for Fansly attachments."""

import os
import sys
import subprocess
import io
from pathlib import Path
from PIL import Image

# Bootstrap PostgreSQL adapter before any sqlite3 imports
sys.path.insert(0, '/opt/media-downloader')
from modules.db_bootstrap import bootstrap_database
bootstrap_database()
import sqlite3

# Database path (routed to PostgreSQL via pgadapter)
DB_PATH = '/opt/media-downloader/database/media_downloader.db'
THUMB_CACHE = Path('/opt/media-downloader/cache/thumbnails/large')
MAX_SIZE = (800, 800)


def generate_thumbnail(file_path, file_type):
    """Generate thumbnail for image or video."""
    try:
        if file_type == 'image':
            with Image.open(file_path) as img:
                img.thumbnail(MAX_SIZE, Image.LANCZOS)
                if img.mode in ('RGBA', 'P'):
                    img = img.convert('RGB')
                buffer = io.BytesIO()
                img.save(buffer, format='JPEG', quality=85)
                return buffer.getvalue()

        elif file_type == 'video':
            cmd = [
                'ffmpeg', '-y', '-ss', '1', '-i', str(file_path),
                '-vframes', '1', '-f', 'image2pipe', '-vcodec', 'mjpeg', '-'
            ]
            result = subprocess.run(cmd, capture_output=True, timeout=30)
            if result.returncode == 0 and result.stdout:
                with Image.open(io.BytesIO(result.stdout)) as img:
                    img.thumbnail(MAX_SIZE, Image.LANCZOS)
                    if img.mode in ('RGBA', 'P'):
                        img = img.convert('RGB')
                    buffer = io.BytesIO()
                    img.save(buffer, format='JPEG', quality=85)
                    return buffer.getvalue()
    except Exception as e:
        print(f"    Error: {e}")
    return None


def main():
    THUMB_CACHE.mkdir(parents=True, exist_ok=True)

    conn = sqlite3.connect(DB_PATH)
    cursor = conn.execute("""
        SELECT a.id, a.local_path, a.file_type
        FROM paid_content_attachments a
        JOIN paid_content_posts p ON a.post_id = p.id
        JOIN paid_content_creators c ON p.creator_id = c.id
        WHERE c.service_id = 'fansly_direct'
          AND a.status = 'completed'
          AND a.local_path IS NOT NULL
        ORDER BY a.id
    """)
    attachments = cursor.fetchall()
    conn.close()

    print(f"Regenerating thumbnails for {len(attachments)} files...")

    generated = 0
    failed = 0
    missing = 0

    for i, (att_id, local_path, file_type) in enumerate(attachments):
        if i % 100 == 0:
            print(f"Progress: {i}/{len(attachments)} (generated: {generated}, failed: {failed})")

        file_path = Path(local_path)
        if not file_path.exists():
            missing += 1
            continue

        thumb_data = generate_thumbnail(file_path, file_type)
        if thumb_data:
            thumb_file = THUMB_CACHE / f"{att_id}.jpg"
            thumb_file.write_bytes(thumb_data)
            generated += 1
        else:
            failed += 1
            print(f"  Failed: {att_id} - {local_path}")

    print(f"\nDone!")
    print(f"  Generated: {generated}")
    print(f"  Failed: {failed}")
    print(f"  Missing files: {missing}")


if __name__ == '__main__':
    main()