"""POST /api/evaluate.dspy — 歌曲评估"""
import json
import os
import tempfile
from songrate.evaluator import evaluate_song

# 获取参数
scene = params_kw.get('scene', 'pop')
filepath = params_kw.get('filepath', '')

# 如果没有 filepath，检查是否有上传文件
if not filepath:
    # 支持 multipart/form-data 上传
    file_content = params_kw.get('file_content', '')
    filename = params_kw.get('filename', '')
    if file_content and filename:
        ext = os.path.splitext(filename)[1] or '.mp3'
        filepath = os.path.join(tempfile.gettempdir(), f'songrate_{os.getpid()}{ext}')
        with open(filepath, 'wb') as f:
            f.write(file_content if isinstance(file_content, bytes) else file_content.encode())
        cleanup = True
    else:
        return json.dumps({"error": "缺少 filepath 或 file_content+filename 参数"}, ensure_ascii=False)
else:
    cleanup = False

try:
    result = evaluate_song(filepath, scene)
    return json.dumps(result, ensure_ascii=False)
finally:
    if cleanup and os.path.exists(filepath):
        os.remove(filepath)