from flask import Flask, jsonify, request, send_from_directory
from flask_cors import CORS
import os
import json
import threading
import urllib.parse
from hf_scrapper import download_film, download_episode, get_system_proxies, get_download_progress
from indexer import indexer
from tvdb import fetch_and_cache_json
import re

app = Flask(__name__)
CORS(app)

# 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")
TV_STORE_JSON_PATH = os.path.join(CACHE_DIR, "tv_store.json")
REPO = os.getenv("REPO")
download_threads = {}

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

for path in [FILM_STORE_JSON_PATH, TV_STORE_JSON_PATH]:
    if not os.path.exists(path):
        with open(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 find_tv_path(json_data, title):
    """Find the path of the TV show in the JSON data based on the title."""
    for directory in json_data:
        if directory['type'] == 'directory' and directory['path'] == 'tv':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory' and title.lower() in sub_directory['path'].lower():
                    return sub_directory['path']
    return None

def get_tv_structure(json_data,title):
    """Find the path of the TV show in the JSON data based on the title."""
    for directory in json_data:
        if directory['type'] == 'directory' and directory['path'] == 'tv':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory' and title.lower() in sub_directory['path'].lower():
                    return sub_directory
    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 bytes_to_human_readable(num, suffix="B"):
    for unit in ["", "K", "M", "G", "T", "P", "E", "Z"]:
        if abs(num) < 1024.0:
            return f"{num:3.1f} {unit}{suffix}"
        num /= 1024.0
    return f"{num:.1f} Y{suffix}"

def encode_episodeid(title,season,episode):
    return f"{title}_{season}_{episode}"

def get_all_tv_shows(indexed_cache):
    """Get all TV shows from the indexed cache structure JSON file."""
    tv_shows = {}
    for directory in indexed_cache:
        if directory['type'] == 'directory' and directory['path'] == 'tv':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory':
                    show_title = sub_directory['path'].split('/')[-1]
                    tv_shows[show_title] = []
                    for season_directory in sub_directory['contents']:
                        if season_directory['type'] == 'directory':
                            season = season_directory['path'].split('/')[-1]
                            for episode in season_directory['contents']:
                                if episode['type'] == 'file':
                                    tv_shows[show_title].append({
                                        "season": season,
                                        "episode": episode['path'].split('/')[-1],
                                        "path": episode['path']
                                    })
    return tv_shows

def get_all_films(indexed_cache):
    """Get all films from the indexed cache structure JSON file."""
    films = []
    for directory in indexed_cache:
        if directory['type'] == 'directory' and directory['path'] == 'films':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory':
                    films.append(sub_directory['path'])
    return films

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/film', methods=['GET'])
def get_movie_api():
    """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))
    
    movie_path = find_movie_path(file_structure, 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/{REPO}/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_film, 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/tv', methods=['GET'])
def get_tv_show_api():
    """Endpoint to get the TV show by title, season, and episode."""
    title = request.args.get('title')
    season = request.args.get('season')
    episode = request.args.get('episode')
    
    if not title or not season or not episode:
        return jsonify({"error": "Title, season, and episode parameters are required"}), 400

    # Load the TV store JSON
    with open(TV_STORE_JSON_PATH, 'r') as json_file:
        tv_store_data = json.load(json_file)

    # Check if the episode is already cached
    if title in tv_store_data and season in tv_store_data[title]:
        for ep in tv_store_data[title][season]:
            if episode in ep:
                cache_path = tv_store_data[title][season][ep]
                if os.path.exists(cache_path):
                    return send_from_directory(os.path.dirname(cache_path), os.path.basename(cache_path))

    tv_path = find_tv_path(file_structure, title)
    
    if not tv_path:
        return jsonify({"error": "TV show not found"}), 404

    episode_path = None
    for directory in file_structure:
        if directory['type'] == 'directory' and directory['path'] == 'tv':
            for sub_directory in directory['contents']:
                if sub_directory['type'] == 'directory' and title.lower() in sub_directory['path'].lower():
                    for season_dir in sub_directory['contents']:
                        if season_dir['type'] == 'directory' and season in season_dir['path']:
                            for episode_file in season_dir['contents']:
                                if episode_file['type'] == 'file' and episode in episode_file['path']:
                                    episode_path = episode_file['path']
                                    break

    if not episode_path:
        return jsonify({"error": "Episode not found"}), 404
    
    cache_path = os.path.join(CACHE_DIR, episode_path)
    file_url = f"https://huggingface.co/{REPO}/resolve/main/{episode_path}"
    proxies = get_system_proxies()
    episode_id = encode_episodeid(title,season,episode)
    
    # Start the download in a separate thread if not already downloading
    if episode_id not in download_threads or not download_threads[episode_id].is_alive():
        thread = threading.Thread(target=download_episode, args=(file_url, TOKEN, cache_path, proxies, episode_id, title))
        download_threads[episode_id] = thread
        thread.start()
    
    return jsonify({"status": "Download started", "episode_id": episode_id})


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

@app.route('/api/filmid', methods=['GET'])
def get_film_id_by_title_api():
    """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/episodeid', methods=['GET'])
def get_episode_id_api():
    """Endpoint to get the episode ID by providing the TV show title, season, and episode."""
    title = request.args.get('title')
    season = request.args.get('season')
    episode = request.args.get('episode')
    if not title or not season or not episode:
        return jsonify({"error": "Title, season, and episode parameters are required"}), 400
    episode_id = encode_episodeid(title,season,episode)
    return jsonify({"episode_id": episode_id})

@app.route('/api/cache/size', methods=['GET'])
def get_cache_size_api():
    total_size = 0
    for dirpath, dirnames, filenames in os.walk(CACHE_DIR):
        for f in filenames:
            fp = os.path.join(dirpath, f)
            total_size += os.path.getsize(fp)
    readable_size = bytes_to_human_readable(total_size)
    return jsonify({"cache_size": readable_size})

@app.route('/api/cache/clear', methods=['POST'])
def clear_cache_api():
    for dirpath, dirnames, filenames in os.walk(CACHE_DIR):
        for f in filenames:
            fp = os.path.join(dirpath, f)
            os.remove(fp)
    return jsonify({"status": "Cache cleared"})

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

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

@app.route('/api/film/metadata', methods=['GET'])
def get_film_metadata_api():
    """Endpoint to get the film metadata by title."""
    title = request.args.get('title')
    if not title:
        return jsonify({'error': 'No title provided'}), 400
    
    json_cache_path = os.path.join(CACHE_DIR, f"{urllib.parse.quote(title)}.json")
    
    if os.path.exists(json_cache_path):
        with open(json_cache_path, 'r') as f:
            data = json.load(f)
        return jsonify(data)
    
    return jsonify({'error': 'Metadata not found'}), 404

@app.route('/api/tv/metadata', methods=['GET'])
def get_tv_metadata_api():
    """Endpoint to get the TV show metadata by title."""
    title = request.args.get('title')
    if not title:
        return jsonify({'error': 'No title provided'}), 400
    
    json_cache_path = os.path.join(CACHE_DIR, f"{urllib.parse.quote(title)}.json")
    
    if os.path.exists(json_cache_path):
        with open(json_cache_path, 'r') as f:
            data = json.load(f)
        
        # Add the file structure to the metadata
        tv_structure_data = get_tv_structure(file_structure, title)
        if tv_structure_data:
            data['file_structure'] = tv_structure_data
        
        return jsonify(data)
    
    return jsonify({'error': 'Metadata not found'}), 404


@app.route("/api/film/all")
def get_all_films_api():
    return get_all_films(file_structure)

@app.route("/api/tv/all")
def get_all_tvshows_api():
    return get_all_tv_shows(file_structure)


# Routes
@app.route('/')
def index():
    return "Server Running"

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