# app.py
import os
from datetime import datetime
from typing import Optional
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from data_cleanup_script import VectorDataCleaner  # 假设你的类放在vector_data_cleaner.py里
import logging

# 日志
logger = logging.getLogger("uvicorn.error")

# FastAPI实例
app = FastAPI(title="Milvus 数据清理")

# 请求体模型
class CleanupRequest(BaseModel):
    knowledge_id: str
    document_id: Optional[str] = None
    dry_run: Optional[bool] = True  # 默认试运行

# 响应体模型（可选，可更详细）
class CleanupResponse(BaseModel):
    knowledge_id: str
    document_id: Optional[str]
    mysql_slice_count: int
    milvus_slice_count: int
    dirty_slice_count: int
    missing_slice_count: int
    dirty_slice_ids: list
    missing_slice_ids: list
    dry_run: bool
    delete_success: Optional[bool] = None
    delete_message: Optional[str] = None
    dirty_slice_samples: Optional[list] = None
    report: str

# 初始化数据清理工具（单例，避免每次请求重新连接数据库）
cleanup_tool = VectorDataCleaner()

@app.post("/cleanup", response_model=CleanupResponse)
def cleanup_data_endpoint(request: CleanupRequest):
    """
    清理Milvus向量数据库中的脏数据
    """
    try:
        # # 执行清理
        # result = cleanup_tool.cleanup_data(
        #     knowledge_id=request.knowledge_id,
        #     document_id=request.document_id,
        #     dry_run=request.dry_run
        # )

        knowledge_ids_list = request.knowledge_ids

        for knowledge_id in knowledge_ids_list:

            result = cleanup_tool.cleanup_data(
                knowledge_id=knowledge_id,
                document_id=None,
                dry_run=False
            )

            # 检查是否有错误
            if "error" in result:
                raise HTTPException(status_code=500, detail=result["error"])

            # 生成报告
            report = cleanup_tool.generate_report(result)
            result["report"] = report

            timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')

            # 保存脏数据ID
            if result.get("dirty_slice_ids"):
                dirty_id_file = f"./data_clean/dirty_ids_{request.knowledge_id}_{timestamp}.txt"
                with open(dirty_id_file, 'w', encoding='utf-8') as f:
                    f.write("\n".join(result["dirty_slice_ids"]))
                logger.info(f"脏数据ID已保存到: {dirty_id_file}")

            # 保存缺失数据ID
            if result.get("missing_slice_ids"):
                missing_id_file = f"./data_clean/missing_ids_{request.knowledge_id}_{timestamp}.txt"
                with open(missing_id_file, 'w', encoding='utf-8') as f:
                    f.write("\n".join(result["missing_slice_ids"]))
                logger.info(f"缺失数据ID已保存到: {missing_id_file}")


            # 保存报告到文件
            os.makedirs("./data_clean", exist_ok=True)
            report_filename = f"./data_clean/data_cleanup_report_{request.knowledge_id}_{timestamp}.txt"
            try:
                with open(report_filename, 'w', encoding='utf-8') as f:
                    f.write(report)
                logger.info(f"清理报告已保存到: {report_filename}")
            except Exception as e:
                logger.error(f"保存报告失败: {e}")

        # return result
        return {"code": 200}

    except Exception as e:
        logger.error(f"清理请求失败: {e}")
        raise HTTPException(status_code=500, detail=str(e))


@app.on_event("shutdown")
def shutdown_event():
    """关闭数据库连接"""
    cleanup_tool.close_connections()


if __name__ == "__main__":
    import uvicorn

    # 自动创建报告目录
    os.makedirs("./data_clean", exist_ok=True)

    # 启动 uvicorn
    uvicorn.run(
        "data_cleanup_script_api:app",           
        host="0.0.0.0",      
        port=9090,
        log_level="info",
    )