#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
简化版语音服务 - 无需PaddleSpeech
仅做文本对比评分，先让APP能用起来
"""

from flask import Flask, request, jsonify
from flask_cors import CORS
import os
import time
from difflib import SequenceMatcher

app = Flask(__name__)
CORS(app)

def calculate_similarity(text1, text2):
    """计算文本相似度"""
    if not text1 or not text2:
        return 0
    
    text1 = ''.join(filter(str.isalnum, text1))
    text2 = ''.join(filter(str.isalnum, text2))
    
    if not text1 or not text2:
        return 0
    
    similarity = SequenceMatcher(None, text1, text2).ratio()
    return round(similarity * 100, 2)

@app.route('/api/speech/recognize', methods=['POST'])
def recognize():
    """
    临时方案：让用户手动输入识别文本
    后续接入真实语音识别
    """
    try:
        # 检查是否有音频文件（暂时忽略，不处理）
        if 'audio' in request.files:
            audio_file = request.files['audio']
            # 保存音频以便后续处理
            temp_dir = './temp_audio'
            if not os.path.exists(temp_dir):
                os.makedirs(temp_dir)
            
            timestamp = str(int(time.time() * 1000))
            temp_path = os.path.join(temp_dir, f'audio_{timestamp}.wav')
            audio_file.save(temp_path)
            print(f"已保存音频: {temp_path}")
        
        reference_text = request.form.get('referenceText', '')
        
        # 模拟识别：返回提示让用户手动输入
        # 实际应用中，这里应该调用语音识别
        
        return jsonify({
            'code': 200,
            'msg': '音频已接收，请手动输入识别文本进行评分',
            'data': {
                'recognizedText': '',  # 空的，让前端手动输入
                'score': 0,
                'pronunciationScore': 0,
                'fluencyScore': 0,
                'status': 'completed',
                'needManualInput': True  # 标记需要手动输入
            }
        })
        
    except Exception as e:
        print(f"错误: {str(e)}")
        return jsonify({
            'code': 500,
            'msg': f'处理失败: {str(e)}'
        }), 500

@app.route('/api/speech/evaluate', methods=['POST'])
def evaluate():
    """
    评测接口：对比用户输入和标准文本
    """
    try:
        user_text = request.form.get('userText', '')
        reference_text = request.form.get('referenceText', '')
        
        if not user_text:
            return jsonify({
                'code': 400,
                'msg': '缺少用户输入文本'
            }), 400
        
        # 计算相似度
        score = calculate_similarity(user_text, reference_text)
        pronunciation_score = max(0, score - 5)
        fluency_score = max(0, score - 3)
        
        return jsonify({
            'code': 200,
            'msg': '评测成功',
            'data': {
                'recognizedText': user_text,
                'score': score,
                'pronunciationScore': pronunciation_score,
                'fluencyScore': fluency_score,
                'status': 'completed'
            }
        })
        
    except Exception as e:
        return jsonify({
            'code': 500,
            'msg': f'评测失败: {str(e)}'
        }), 500

@app.route('/api/speech/health', methods=['GET'])
def health():
    """健康检查"""
    return jsonify({
        'code': 200,
        'msg': '服务正常（简化版）',
        'data': {
            'version': 'simple',
            'speech_recognition': False
        }
    })

if __name__ == '__main__':
    print("=" * 50)
    print("简化版语音服务")
    print("说明：音频接收后需手动输入识别文本")
    print("=" * 50)
    print("")
    print("服务启动在: http://localhost:5000")
    print("")
    
    app.run(host='0.0.0.0', port=5000, debug=False)