from fastapi import FastAPI
from .service import crawler_service
from .schemas import RegisterRequest, PendingRequest, SaveResultsRequest, AddUrlsRequest, SearchRequest
from .utils import make_response

app = FastAPI(title="Wiki Crawler API")

@app.post("/register")
async def register(req: RegisterRequest):
    try:
        data = crawler_service.register_task(req.url)
        return make_response(1, "Success", data)
    except Exception as e:
        return make_response(0, str(e))

@app.post("/add_urls")
async def add_urls(req: AddUrlsRequest):
    try:
        data = crawler_service.add_urls(req.task_id, req.urls)
        return make_response(1, "Success", data)
    except Exception as e:
        return make_response(0, str(e))

@app.post("/pending_urls")
async def pending_urls(req: PendingRequest):
    try:
        data = crawler_service.get_pending_urls(req.task_id, req.limit)
        msg = "Success" if data["urls"] else "Queue Empty"
        return make_response(1, msg, data)
    except Exception as e:
        return make_response(0, str(e))

@app.post("/save_results")
async def save_results(req: SaveResultsRequest):
    try:
        data = crawler_service.save_results(req.task_id, req.results)
        return make_response(1, "Success", data)
    except Exception as e:
        return make_response(0, str(e))

@app.post("/search")
async def search(req: SearchRequest):
    """
    通用搜索接口：
    支持基于 task_id 的局部搜索，也支持不传 task_id 的全库搜索。
    """
    try:
        # 1. 基础校验：确保向量不为空且维度正确（阿里 v4 模型通常为 1536）
        if not req.query_embedding or len(req.query_embedding) != 1536:
            return make_response(
                code=2, 
                msg=f"向量维度错误。期望 1536, 实际收到 {len(req.query_embedding) if req.query_embedding else 0}",
                data=None
            )

        # 2. 调用业务类执行搜索
        data = crawler_service.search_knowledge(
            query_embedding=req.query_embedding,
            task_id=req.task_id,
            limit=req.limit
        )

        # 3. 统一返回
        return make_response(
            code=1, 
            msg="搜索完成", 
            data=data
        )

    except Exception as e:
        # 记录日志并返回失败信息
        print(f"搜索接口异常: {str(e)}")
        return make_response(code=0, msg=f"搜索失败: {str(e)}")

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000, reload=True)