import os
import json
import random
import uuid
from flask import Flask, request, jsonify, session, render_template
from flask_cors import CORS
from datetime import datetime
from elo_rank import EloRank

app = Flask(__name__)
CORS(app)
app.secret_key = 'supersecretkey'

DATA_DIR = './data'
RESULTS_DIR = './results'

# 实例化 EloRank 系统
elo_rank_system = EloRank()

# 初始化 Elo 排名的模型
models = ['output_path_4o', 'output_path_miniomni', 'output_path_speechgpt', 'output_path_funaudio', 'output_path_4o_cascade', 'output_path_4o_llama_omni']
for model in models:
    elo_rank_system.add_model(model)


def load_test_data(task):
    """Load the JSON file corresponding to the selected task"""
    with open(os.path.join(DATA_DIR, f"{task}.json"), "r", encoding='utf-8') as f:
        test_data = json.load(f)
    
    # 更新音频路径，将它们指向 Flask 静态文件夹
    for item in test_data:
        item['input_path'] = f"/static/audio{item['input_path']}"
        item['output_path_4o'] = f"/static/audio{item['output_path_4o']}"
        item['output_path_miniomni'] = f"/static/audio{item['output_path_miniomni']}"
        item['output_path_speechgpt'] = f"/static/audio{item['output_path_speechgpt']}"
        item['output_path_funaudio'] = f"/static/audio{item['output_path_funaudio']}"
        item['output_path_4o_cascade'] = f"/static/audio{item['output_path_4o_cascade']}"
        item['output_path_4o_llama_omni'] = f"/static/audio{item['output_path_4o_llama_omni']}"
    
    return test_data


def save_result(task, username, result_data, session_id):
    """Save user's result in a separate file"""
    file_path = os.path.join(RESULTS_DIR, f"{task}_{username}_{session_id}.jsonl")
    # 获取所有模型的 Elo 分数
    elo_scores = {model: elo_rank_system.get_rating(model) for model in models}
    
    # 添加 Elo 分数和时间戳到结果数据
    result_data['elo_scores'] = elo_scores
    result_data['timestamp'] = datetime.now().isoformat()
    with open(file_path, "a", encoding='utf-8') as f:
        f.write(json.dumps(result_data) + "\n")

@app.route('/start_test', methods=['POST'])
def start_test():
    """Initiate the test for a user with the selected task"""
    data = request.json
    task = data['task']
    username = data['username']

    # Load the test data
    test_data = load_test_data(task)
    
    # Shuffle test data for the user
    random.shuffle(test_data)

    # Generate a unique session ID (for example using uuid)
    session_id = str(uuid.uuid4())

    # Store in session
    session['task'] = task
    session['username'] = username
    session['test_data'] = test_data
    session['current_index'] = 0
    session['session_id'] = session_id  # Store the session ID in the session

    task_description = test_data[0].get('task_description', '')

    return jsonify({"message": "Test started", "total_tests": len(test_data), "task_description": task_description})



@app.route('/next_test', methods=['GET'])
def next_test():
    """Serve the next test item"""
    if 'current_index' not in session or 'test_data' not in session:
        return jsonify({"message": "No active test found"}), 400

    current_index = session['current_index']
    test_data = session['test_data']

    if current_index >= len(test_data):
        # Return the "Test completed" message when all tests are done
        return jsonify({"message": "Test completed"}), 200

    # 使用 EloRank 的 sample_next_match 来选择两款模型
    selected_models = elo_rank_system.sample_next_match()

    # Serve test data with the two selected models
    current_test = test_data[current_index]
    session['selected_models'] = selected_models
    session['current_index'] += 1

    return jsonify({
        "text": current_test["text"],
        "input_path": current_test["input_path"],
        "model_a": selected_models[0],
        "model_b": selected_models[1],
        "audio_a": current_test[selected_models[0]],
        "audio_b": current_test[selected_models[1]]
    })

@app.route('/submit_result', methods=['POST'])
def submit_result():
    """Submit the user's result and save it"""
    data = request.json
    chosen_model = data['chosen_model']

    username = session.get('username')
    task = session.get('task')
    current_index = session.get('current_index') - 1  # Subtract since we increment after serving
    session_id = session.get('session_id')  # Get the session ID

    if not username or not task or current_index < 0:
        return jsonify({"message": "No active test found"}), 400

    # Retrieve the selected models
    selected_models = session['selected_models']
    model_a = selected_models[0]
    model_b = selected_models[1]

    result = {
        "name": username,
        "chosen_model": chosen_model,
        "model_a": model_a,
        "model_b": model_b,
        "result": {
            model_a: 1 if chosen_model == 'A' else 0,
            model_b: 1 if chosen_model == 'B' else 0
        }
    }

    # Save the result for the current test using session_id to avoid filename conflict
    test_data = session['test_data'][current_index]
    result_data = {**test_data, **result}
    save_result(task, username, result_data, session_id)

    # 更新 Elo 排名系统
    if chosen_model == 'A':
        elo_rank_system.record_match(model_a, model_b)
    else:
        elo_rank_system.record_match(model_b, model_a)

    return jsonify({"message": "Result submitted", "model_a": model_a, "model_b": model_b, "chosen_model": chosen_model})

@app.route('/end_test', methods=['GET'])
def end_test():
    """End the test session"""
    session.clear()
    return jsonify({"message": "Test completed"})

# 渲染index.html页面
@app.route('/')
def index():
    return render_template('index.html')

if __name__ == '__main__':
    if not os.path.exists(RESULTS_DIR):
        os.makedirs(RESULTS_DIR)
    # 允许局域网访问
    app.run(debug=True, host="0.0.0.0", port=8080)