__version__ = "pre-dev"
__all__ = ["quizify"]
__author__ = "SimolZimol"

from flask import Flask, redirect, request, session, url_for, render_template
import os
import spotipy
from spotipy.oauth2 import SpotifyOAuth
import random
from difflib import SequenceMatcher

app = Flask(__name__)
app.secret_key = os.getenv("SECRET_KEY")

# Erweiterte Berechtigungen für Web Playback SDK
SCOPE = "user-library-read playlist-read-private streaming user-read-email user-read-private"

def get_spotify_client():
    return spotipy.Spotify(auth_manager=SpotifyOAuth(
        client_id=os.getenv("SPOTIPY_CLIENT_ID"),
        client_secret=os.getenv("SPOTIPY_CLIENT_SECRET"),
        redirect_uri=os.getenv("SPOTIPY_REDIRECT_URI"),
        scope=SCOPE,
        cache_path=".cache"
    ))

def similarity(a, b):
    return SequenceMatcher(None, a.lower(), b.lower()).ratio()

@app.route("/")
def home():
    return render_template("login.html")

@app.route("/login")
def login():
    sp_oauth = SpotifyOAuth(
        client_id=os.getenv("SPOTIPY_CLIENT_ID"),
        client_secret=os.getenv("SPOTIPY_CLIENT_SECRET"),
        redirect_uri=os.getenv("SPOTIPY_REDIRECT_URI"),
        scope=SCOPE
    )
    auth_url = sp_oauth.get_authorize_url()
    return redirect(auth_url)

@app.route("/callback")
def callback():
    sp_oauth = SpotifyOAuth(
        client_id=os.getenv("SPOTIPY_CLIENT_ID"),
        client_secret=os.getenv("SPOTIPY_CLIENT_SECRET"),
        redirect_uri=os.getenv("SPOTIPY_REDIRECT_URI"),
        scope=SCOPE
    )
    session.clear()
    code = request.args.get('code')
    token_info = sp_oauth.get_access_token(code)
    session["token_info"] = token_info
    return redirect("/playlists")

@app.route("/playlists")
def playlists():
    sp = get_spotify_client()
    playlists = sp.current_user_playlists()["items"]
    return render_template("playlists.html", playlists=playlists)

@app.route("/quiz/<playlist_id>")
def quiz(playlist_id):
    game_mode = request.args.get('mode', 'artist')
    
    sp = get_spotify_client()
    items = sp.playlist_items(playlist_id, additional_types=["track"])["items"]
    
    tracks = [item["track"] for item in items]
    if not tracks:
        return "Keine Tracks verfügbar!"

    track = random.choice(tracks)
    
    # Token aus der Sitzung holen für das Web Playback SDK
    token_info = session.get('token_info', None)
    if not token_info:
        return redirect('/login')
    
    # Zugriff auf access_token
    access_token = token_info['access_token']
    
    # Alle Tracks für die Suchfunktion (für title und artist mode)
    all_tracks = []
    for item in tracks:
        track_info = {
            "id": item["id"],
            "name": item["name"],
            "artist": item["artists"][0]["name"],
            "uri": item["uri"],
            "release_date": item.get("album", {}).get("release_date", "Unbekannt")[:4]  # Nur das Jahr
        }
        all_tracks.append(track_info)
    
    return render_template(
        "quiz.html", 
        track=track, 
        access_token=access_token, 
        playlist_id=playlist_id,
        game_mode=game_mode,
        all_tracks=all_tracks
    )

@app.route("/search_track", methods=["POST"])
def search_track():
    data = request.json
    query = data.get('query', '').lower()
    all_tracks = data.get('all_tracks', [])
    
    if not query or not all_tracks:
        return {"results": []}
    
    # Tracks nach Ähnlichkeit filtern (80% Übereinstimmung)
    results = []
    for track in all_tracks:
        name_similarity = similarity(query, track["name"])
        artist_similarity = similarity(query, track["artist"])
        
        # Wenn Name oder Künstler zu 80% übereinstimmt
        if name_similarity >= 0.8 or artist_similarity >= 0.8:
            results.append({
                "id": track["id"],
                "name": track["name"],
                "artist": track["artist"],
                "uri": track["uri"],
                "similarity": max(name_similarity, artist_similarity)
            })
    
    # Nach Ähnlichkeit sortieren
    results.sort(key=lambda x: x["similarity"], reverse=True)
    
    return {"results": results}

@app.route("/check_answer", methods=["POST"])
def check_answer():
    data = request.json
    guess = data.get('guess', '').lower()
    correct_answer = data.get('correct_answer', '').lower()
    game_mode = data.get('game_mode', 'artist')
    
    # Bei Jahr-Modus: Exakte Übereinstimmung prüfen
    if game_mode == 'year':
        is_correct = guess == correct_answer
    else:
        # Bei anderen Modi: Ähnlichkeitsprüfung (90% Übereinstimmung gilt als korrekt)
        is_correct = similarity(guess, correct_answer) >= 0.9
    
    return {
        "correct": is_correct,
        "correct_answer": correct_answer
    }

@app.route("/play_track", methods=["POST"])
def play_track():
    device_id = request.args.get('device_id')
    track_uri = request.args.get('track_uri')
    
    if not device_id or not track_uri:
        return {"error": "Missing device_id or track_uri"}, 400
    
    sp = get_spotify_client()
    sp.start_playback(device_id=device_id, uris=[track_uri])
    
    return {"success": True}

@app.route("/toggle_playback", methods=["POST"])
def toggle_playback():
    data = request.json
    device_id = data.get('device_id')
    
    if not device_id:
        return {"error": "Missing device_id"}, 400
    
    sp = get_spotify_client()
    # Aktuellen Playback-Status abrufen
    current_playback = sp.current_playback()
    
    if current_playback and current_playback.get('is_playing'):
        sp.pause_playback(device_id=device_id)
    else:
        sp.start_playback(device_id=device_id)
    
    return {"success": True}

@app.route('/logout')
def logout():
    session.pop('user', None)
    return redirect(url_for('index'))

@app.route('/')
def index():
    user = session.get('user')  # Benutzerinfos aus der Session holen, falls vorhanden
    return render_template('index.html', user=user)

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5000, debug=True)