import logging
from typing import List, Optional

import httpx
from fastapi import APIRouter, HTTPException, Query

from .serializers import (
    AmitTemuScrapeRequest,
    SavedProduct,
    TemuScrapeRequest,
    TemuScrapeResponse,
    TemuSearchResponse,
    TemuProduct,
)
from .service import TemuScraperService
from .storage import get_storage

app_router = APIRouter()

logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
log = logging.getLogger(__name__)


def _products_from_items(items: list) -> List[TemuProduct]:
    return [TemuProduct.model_validate(item) for item in items]


def _sovereigntaylor_response(
    request: TemuScrapeRequest,
    items: list,
    meta: dict,
    saved_run_id: int,
    saved_at: str,
) -> TemuScrapeResponse:
    products = _products_from_items(items)
    return TemuScrapeResponse(
        scraper=meta.get("scraper", "sovereigntaylor"),
        actor_id=meta.get("actor_id"),
        saved_run_id=saved_run_id,
        saved_at=saved_at,
        search_terms=request.search_terms,
        product_urls=request.product_urls,
        category=request.category,
        max_results=request.max_results,
        product_count=len(products),
        products=products,
    )


def _amit123_response(
    request: AmitTemuScrapeRequest,
    items: list,
    meta: dict,
    saved_run_id: int,
    saved_at: str,
) -> TemuScrapeResponse:
    products = _products_from_items(items)
    return TemuScrapeResponse(
        scraper=meta.get("scraper", "amit123"),
        actor_id=meta.get("actor_id"),
        saved_run_id=saved_run_id,
        saved_at=saved_at,
        search_queries=request.search_queries,
        currency=request.currency,
        max_results=request.max_results,
        product_count=len(products),
        products=products,
    )


def _search_saved(
    scraper: str,
    q: str,
    limit: int,
    run_id: Optional[int],
    since: Optional[str],
) -> TemuSearchResponse:
    storage = get_storage()
    results, total = storage.search_products(
        scraper=scraper,
        query=q,
        limit=limit,
        run_id=run_id,
        since=since,
    )
    return TemuSearchResponse(
        query=q,
        scraper=scraper,
        match_count=len(results),
        total_saved_for_scraper=total,
        run_id=run_id,
        since=since,
        results=[SavedProduct.model_validate(r) for r in results],
    )


async def _handle_scrape(coro):
    try:
        return await coro
    except ValueError as e:
        log.error(f"Validation or config error: {e}")
        raise HTTPException(status_code=400, detail=str(e))
    except httpx.HTTPStatusError as e:
        log.error(f"Apify returned {e.response.status_code}: {e.response.text}")
        raise HTTPException(status_code=e.response.status_code, detail=e.response.text)
    except httpx.RequestError as e:
        log.error(f"Network error calling Apify: {e}")
        raise HTTPException(status_code=502, detail=f"Upstream request failed: {e}")
    except Exception as e:
        log.error(f"Unexpected error: {e}")
        raise HTTPException(status_code=500, detail=str(e))


@app_router.post("/scrape", response_model=TemuScrapeResponse)
async def scrape_and_save_sovereigntaylor(body: TemuScrapeRequest):
    """
    Run Apify sovereignigtaylor scraper, save results with timestamp, and index them.

    Expensive — use GET /scrape to search saved results instead of re-scraping.
    """
    async def run():
        service = TemuScraperService()
        items, meta = await service.scrape_sovereigntaylor(body)
        storage = get_storage()
        run_id, saved_at, _ = storage.save_scrape(
            scraper="sovereigntaylor",
            actor_id=meta.get("actor_id"),
            request_payload=body.model_dump(),
            items=items,
        )
        log.info(f"Saved {len(items)} products as run_id={run_id} at {saved_at}")
        return _sovereigntaylor_response(body, items, meta, run_id, saved_at)

    return await _handle_scrape(run())


@app_router.get("/scrape", response_model=TemuSearchResponse)
async def search_saved_sovereigntaylor(
    q: str = Query(..., description="Search saved sovereignigtaylor results (FTS index)"),
    limit: int = Query(50, ge=1, le=500),
    run_id: Optional[int] = Query(None, description="Filter to a specific saved scrape run"),
    since: Optional[str] = Query(None, description="Only results saved at or after this ISO timestamp"),
):
    """Search locally saved scrape results. Does not call Apify."""
    if not q.strip():
        raise HTTPException(status_code=400, detail="Query parameter q is required")
    return _search_saved("sovereigntaylor", q, limit, run_id, since)


@app_router.post("/scrape/amit123", response_model=TemuScrapeResponse)
async def scrape_and_save_amit123(body: AmitTemuScrapeRequest):
    """
    Run Apify amit123 scraper, save results with timestamp, and index them.

    Expensive — use GET /scrape/amit123 to search saved results.
    """
    async def run():
        service = TemuScraperService()
        items, meta = await service.scrape_amit123(body)
        storage = get_storage()
        run_id, saved_at, _ = storage.save_scrape(
            scraper="amit123",
            actor_id=meta.get("actor_id"),
            request_payload=body.model_dump(),
            items=items,
        )
        log.info(f"Saved {len(items)} products as run_id={run_id} at {saved_at}")
        return _amit123_response(body, items, meta, run_id, saved_at)

    return await _handle_scrape(run())


@app_router.get("/scrape/amit123", response_model=TemuSearchResponse)
async def search_saved_amit123(
    q: str = Query(..., description="Search saved amit123 results (FTS index)"),
    limit: int = Query(50, ge=1, le=500),
    run_id: Optional[int] = Query(None, description="Filter to a specific saved scrape run"),
    since: Optional[str] = Query(None, description="Only results saved at or after this ISO timestamp"),
):
    """Search locally saved scrape results. Does not call Apify."""
    if not q.strip():
        raise HTTPException(status_code=400, detail="Query parameter q is required")
    return _search_saved("amit123", q, limit, run_id, since)