from flask import Flask, jsonify, request, send_from_directory
import os
import json
import threading
from hf_scrapper import download_file, get_system_proxies, get_download_progress
from indexer import indexer
from tvdb import fetch_and_cache_json
import re

app = Flask(__name__)

# Constants and Configuration
CACHE_DIR = os.getenv("CACHE_DIR")
INDEX_FILE = os.getenv("INDEX_FILE")
TOKEN = os.getenv("TOKEN")
FILM_STORE_JSON_PATH = os.path.join(CACHE_DIR, "film_store.json")
download_threads = {}

# Ensure CACHE_DIR exists
if not os.path.exists(CACHE_DIR):
    os.makedirs(CACHE_DIR)

if not os.path.exists(FILM_STORE_JSON_PATH):
    with open(FILM_STORE_JSON_PATH, 'w') as json_file:
        json.dump({}, json_file)

# Index the file structure
indexer()

# Load the file structure JSON
if not os.path.exists(INDEX_FILE):
    raise FileNotFoundError(f"{INDEX_FILE} not found. Please make sure the file exists.")

with open(INDEX_FILE, 'r') as f:
    file_structure = json.load(f)

# Function Definitions

def load_json(file_path):
    """Load JSON data from a file."""
    with open(file_path, 'r') as file:
        return json.load(file)

def find_movie_path(json_data, title):
    """Find the path of the movie in the JSON data based on the title."""
    for directory in json_data:
        if directory['type'] == 'directory' and directory['path'] == 'films':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory':
                    for item in sub_directory['contents']:
                        if item['type'] == 'file' and title.lower() in item['path'].lower():
                            return item['path']
    return None

def get_film_id(title):
    """Generate a film ID based on the title."""
    return title.replace(" ", "_").lower()

def prefetch_metadata():
    """Prefetch metadata for all items in the file structure."""
    for item in file_structure:
        if 'contents' in item:
            for sub_item in item['contents']:
                original_title = sub_item['path'].split('/')[-1]
                media_type = 'series' if item['path'].startswith('tv') else 'movie'
                title = original_title
                year = None
                
                # Extract year from the title if available
                match = re.search(r'\((\d{4})\)', original_title)
                if match:
                    year_str = match.group(1)
                    if year_str.isdigit() and len(year_str) == 4:
                        title = original_title[:match.start()].strip()
                        year = int(year_str)
                else:
                    parts = original_title.rsplit(' ', 1)
                    if len(parts) > 1 and parts[-1].isdigit() and len(parts[-1]) == 4:
                        title = parts[0].strip()
                        year = int(parts[-1])
                
                fetch_and_cache_json(original_title, title, media_type, year)

def start_prefetching():
    """Start the metadata prefetching in a separate thread."""
    prefetch_metadata()

# Start prefetching metadata
thread = threading.Thread(target=start_prefetching)
thread.daemon = True
thread.start()

# API Endpoints

@app.route('/api/movie', methods=['GET'])
def get_movie():
    """Endpoint to get the movie by title."""
    title = request.args.get('title')
    if not title:
        return jsonify({"error": "Title parameter is required"}), 400
    
    # Load the film store JSON
    with open(FILM_STORE_JSON_PATH, 'r') as json_file:
        film_store_data = json.load(json_file)

    # Check if the film is already cached
    if title in film_store_data:
        cache_path = film_store_data[title]
        if os.path.exists(cache_path):
            return send_from_directory(os.path.dirname(cache_path), os.path.basename(cache_path))
    
    # If not cached, find the movie path in the index file
    json_data = load_json(INDEX_FILE)
    movie_path = find_movie_path(json_data, title)
    
    if not movie_path:
        return jsonify({"error": "Movie not found"}), 404
    
    cache_path = os.path.join(CACHE_DIR, movie_path)
    file_url = f"https://huggingface.co/Unicone-Studio/jellyfin_media/resolve/main/{movie_path}"
    proxies = get_system_proxies()
    film_id = get_film_id(title)
    
    # Start the download in a separate thread if not already downloading
    if film_id not in download_threads or not download_threads[film_id].is_alive():
        thread = threading.Thread(target=download_file, args=(file_url, TOKEN, cache_path, proxies, film_id, title))
        download_threads[film_id] = thread
        thread.start()
    
    return jsonify({"status": "Download started", "film_id": film_id})

@app.route('/api/progress/<film_id>', methods=['GET'])
def get_progress(film_id):
    """Endpoint to get the download progress of a movie."""
    progress = get_download_progress(film_id)
    return jsonify({"film_id": film_id, "progress": progress})

@app.route('/api/filmid', methods=['GET'])
def get_film_id_by_title():
    """Endpoint to get the film ID by providing the movie title."""
    title = request.args.get('title')
    if not title:
        return jsonify({"error": "Title parameter is required"}), 400
    film_id = get_film_id(title)
    return jsonify({"film_id": film_id})

@app.route('/api/film_store', methods=['GET'])
def get_film_store():
    """Endpoint to get the film store JSON."""
    if os.path.exists(FILM_STORE_JSON_PATH):
        with open(FILM_STORE_JSON_PATH, 'r') as json_file:
            film_store_data = json.load(json_file)
        return jsonify(film_store_data)
    return jsonify({}), 404


# Main entry point
if __name__ == "__main__":
    app.run(debug=True, host="0.0.0.0", port=7860)