from rest_framework import status
from rest_framework.permissions import IsAuthenticated
from rest_framework.parsers import JSONParser
from adrf.views import APIView
from rest_framework.pagination import PageNumberPagination
from rest_framework.response import Response
from asgiref.sync import sync_to_async
from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi
from chunyu_project.common_schemas import success_response, error_response, unauthorized_response, not_found_response

from adrf import generics
from adrf.generics import aget_object_or_404

from utils.response_codes import ResponseCode, create_standardized_response, create_standardized_error_response
from .models import BrowsingHistory
from .serializers import BrowsingHistorySerializer, BrowsingHistoryCreateSerializer


class HistoryPagination(PageNumberPagination):
    page_size = 50
    page_size_query_param = 'page_size'
    max_page_size = 200

    def get_paginated_response(self, data):
        return Response({
            'code': 10000,
            'message': 'Success',
            'data': {
                'count': self.page.paginator.count,
                'next': self.get_next_link(),
                'previous': self.get_previous_link(),
                'results': data,
            }
        })


class BrowsingHistoryListCreateView(generics.ListCreateAPIView):
    permission_classes = [IsAuthenticated]
    parser_classes = [JSONParser]
    pagination_class = HistoryPagination

    def get_serializer_class(self):
        if self.request.method == 'POST':
            return BrowsingHistoryCreateSerializer
        return BrowsingHistorySerializer

    def get_queryset(self):
        qs = BrowsingHistory.objects.filter(user=self.request.user)
        # 隐藏实用工具、编程学习和文章资源
        qs = qs.exclude(type__in=['utility', 'learn', 'article'])
        record_type = self.request.query_params.get('type')
        if record_type:
            qs = qs.filter(type=record_type)
        return qs

    @swagger_auto_schema(
        tags=['历史'],
        operation_summary='获取浏览历史列表',
        operation_description='获取当前用户的浏览历史记录，支持按类型筛选和分页',
        manual_parameters=[
            openapi.Parameter('type', openapi.IN_QUERY, description='记录类型筛选: tool/api', type=openapi.TYPE_STRING),
            openapi.Parameter('page', openapi.IN_QUERY, description='页码', type=openapi.TYPE_INTEGER),
            openapi.Parameter('page_size', openapi.IN_QUERY, description='每页数量', type=openapi.TYPE_INTEGER),
        ],
        responses={200: success_response, 401: unauthorized_response}
    )
    async def list(self, request, *args, **kwargs):
        queryset = self.filter_queryset(self.get_queryset())
        # 兜底：DRF 分页器内部同步评估 queryset（count + 切片取值）
        page = await sync_to_async(self.paginate_queryset)(queryset)
        if page is not None:
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(await serializer.adata)
        results = [x async for x in queryset]
        serializer = self.get_serializer(results, many=True)
        return Response({'code': 10000, 'message': 'Success', 'data': await serializer.adata})

    @swagger_auto_schema(
        tags=['历史'],
        operation_summary='创建浏览记录',
        operation_description='记录用户的浏览历史，同一链接一小时内重复访问会更新时间',
        request_body=BrowsingHistoryCreateSerializer,
        responses={201: success_response, 400: error_response, 401: unauthorized_response}
    )
    async def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        is_valid = serializer.is_valid()
        if is_valid:
            # 兜底：serializer.create 内部有同步 ORM（filter/first/save/create）
            instance = await serializer.asave()
            return create_standardized_response(
                data=BrowsingHistorySerializer(instance).data,
                code=ResponseCode.SUCCESS,
                message='记录成功',
                status_code=status.HTTP_201_CREATED
            )
        return create_standardized_error_response(
            data=serializer.errors,
            code=ResponseCode.VALIDATION_ERROR,
            status_code=status.HTTP_400_BAD_REQUEST
        )


class BrowsingHistoryDeleteView(APIView):
    permission_classes = [IsAuthenticated]

    @swagger_auto_schema(
        tags=['历史'],
        operation_summary='删除浏览记录',
        operation_description='删除指定的浏览历史记录',
        manual_parameters=[
            openapi.Parameter('pk', openapi.IN_PATH, description='记录ID', type=openapi.TYPE_INTEGER, required=True),
        ],
        responses={204: '删除成功', 401: unauthorized_response, 404: not_found_response}
    )
    async def delete(self, request, pk):
        record = await aget_object_or_404(BrowsingHistory, pk=pk, user=request.user)
        await record.adelete()
        return create_standardized_response(
            code=ResponseCode.SUCCESS,
            message='删除成功',
            status_code=status.HTTP_204_NO_CONTENT
        )


class BrowsingHistoryClearView(APIView):
    permission_classes = [IsAuthenticated]

    @swagger_auto_schema(
        tags=['历史'],
        operation_summary='清空浏览记录',
        operation_description='清空当前用户的所有浏览历史记录',
        responses={200: success_response, 401: unauthorized_response}
    )
    async def delete(self, request):
        count = (await BrowsingHistory.objects.filter(user=request.user).adelete())[0]
        return create_standardized_response(
            data={'deleted': count},
            code=ResponseCode.SUCCESS,
            message='清空成功'
        )