from flask import Flask, request, jsonify, session
from gensim.models import KeyedVectors
import numpy as np
import random
import os
from flask import send_from_directory

app = Flask(__name__)
app.secret_key = os.urandom(24)

# Utilitaires globaux (en mémoire pour chaque session)
game_state = {}

TOLERANCE = 1e-4

# Calculer la similarité cosinus entre deux vecteurs
def cos(a, b):
    return float(np.dot(a, b) / (np.linalg.norm(a) * np.linalg.norm(b)))

def is_valid_word(word, lang, valid_words):
    if lang == "fr":
        return word.islower() and all(c.isalpha() for c in word) and word in valid_words and 3 <= len(word) <= 15
    else:
        return word.islower() and word.isalpha() and word in valid_words and 3 <= len(word) <= 15

@app.route('/init', methods=['POST'])
def init_game():
    data = request.json
    first_word = data['first_word'].lower()
    first_score = float(data['first_score']) / 100
    lang = data.get('lang', 'en')
    if lang == "fr":
        tol = 1e-2
        with open("french_words.txt") as f:
            valid_words = set(w.strip() for w in f)
        model_path = "frWac_non_lem_no_postag_no_phrase_200_cbow_cut0.bin"
        model = KeyedVectors.load_word2vec_format(model_path, binary=True)
    else:
        tol = TOLERANCE
        with open("english_words.txt") as f:
            valid_words = set(w.strip() for w in f)
        model_path = "google_news_reduced.kv"
        model = KeyedVectors.load(model_path)
    if first_word not in model:
        return jsonify({'error': 'Mot inconnu du modèle'}), 400
    vec1 = model[first_word]
    all_words = [w for w in model.index_to_key if w != first_word and is_valid_word(w, lang, valid_words)]
    words = [w for w in all_words if abs(cos(vec1, model[w]) - first_score) < tol]
    word_indexes = [all_words.index(w) for w in words]
    session['lang'] = lang
    session['first_word'] = first_word
    session['tol'] = tol
    session['model_path'] = model_path
    session['word_indexes'] = word_indexes
    session['history'] = []  # Liste des {word, score/pass, remaining}
    return jsonify({'count': len(words), 'history': session['history']})

@app.route('/next', methods=['POST'])
def next_word():
    word_indexes = session.get('word_indexes', [])
    if not word_indexes:
        return jsonify({'error': 'Plus de mots'}), 400
    # Recalculer all_words à partir du modèle et du mot de départ
    lang = session.get('lang', 'en')
    model_path = session.get('model_path')
    first_word = session.get('first_word')
    if model_path.endswith('.kv'):
        model = KeyedVectors.load(model_path)
    else:
        model = KeyedVectors.load_word2vec_format(model_path, binary=True)
    if lang == 'fr':
        with open("french_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    else:
        with open("english_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    all_words = [w for w in model.index_to_key if w != first_word and is_valid_word(w, lang, valid_words)]
    idx = random.choice(word_indexes)
    guess = all_words[idx]
    session['current_guess_idx'] = idx
    return jsonify({'guess': guess, 'remaining': len(word_indexes), 'history': session.get('history', [])})

@app.route('/score', methods=['POST'])
def submit_score():
    data = request.json
    score = data.get('score')
    if score is None:
        return jsonify({'error': 'Score manquant'}), 400
    try:
        score = float(score) / 100
    except ValueError:
        return jsonify({'error': 'Score invalide'}), 400
    lang = session.get('lang', 'en')
    tol = session.get('tol', TOLERANCE)
    model_path = session.get('model_path')
    word_indexes = session.get('word_indexes', [])
    current_guess_idx = session.get('current_guess_idx')
    if current_guess_idx is None:
        return jsonify({'error': 'Aucun mot courant'}), 400
    if model_path.endswith('.kv'):
        model = KeyedVectors.load(model_path)
    else:
        model = KeyedVectors.load_word2vec_format(model_path, binary=True)
    first_word = session.get('first_word')
    if lang == 'fr':
        with open("french_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    else:
        with open("english_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    all_words = [w for w in model.index_to_key if w != first_word and is_valid_word(w, lang, valid_words)]
    guess_word = all_words[current_guess_idx]
    vec_guess = model[guess_word]
    new_word_indexes = [i for i in word_indexes if abs(cos(vec_guess, model[all_words[i]]) - score) < tol]
    session['word_indexes'] = new_word_indexes
    history = session.get('history', [])
    history.append({'word': guess_word, 'score': score, 'remaining': len(new_word_indexes)})
    session['history'] = history
    if not new_word_indexes:
        return jsonify({'result': 'Plus aucun mot possible. Terminé.', 'history': history})
    if len(new_word_indexes) == 1:
        return jsonify({'result': f"Plus qu'un seul mot possible: {all_words[new_word_indexes[0]]}", 'history': history})
    return jsonify({'remaining': len(new_word_indexes), 'history': history})

@app.route('/skip', methods=['POST'])
def skip_word():
    word_indexes = session.get('word_indexes', [])
    current_guess_idx = session.get('current_guess_idx')
    if current_guess_idx is None or not word_indexes:
        return jsonify({'error': 'Aucun mot à passer'}), 400
    # Recalculer all_words à partir du modèle et du mot de départ
    lang = session.get('lang', 'en')
    model_path = session.get('model_path')
    first_word = session.get('first_word')
    if model_path.endswith('.kv'):
        model = KeyedVectors.load(model_path)
    else:
        model = KeyedVectors.load_word2vec_format(model_path, binary=True)
    if lang == 'fr':
        with open("french_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    else:
        with open("english_words.txt") as f:
            valid_words = set(w.strip() for w in f)
    all_words = [w for w in model.index_to_key if w != first_word and is_valid_word(w, lang, valid_words)]
    try:
        word_indexes.remove(current_guess_idx)
    except ValueError:
        pass
    session['word_indexes'] = word_indexes
    history = session.get('history', [])
    history.append({'word': all_words[current_guess_idx], 'score': 'pass', 'remaining': len(word_indexes)})
    session['history'] = history
    if not word_indexes:
        return jsonify({'result': 'Plus aucun mot possible. Terminé.', 'history': history})
    return jsonify({'remaining': len(word_indexes), 'history': history})


# Servir index.html à la racine
@app.route('/')
def root():
    return send_from_directory('.', 'index.html')

# Servir les fichiers statiques (ex: .txt, .js, .css)
@app.route('/<path:filename>')
def static_files(filename):
    return send_from_directory('.', filename)

if __name__ == '__main__':
    app.run(debug=True)