from rest_framework import viewsets, permissions
from rest_framework.pagination import PageNumberPagination
from rest_framework.response import Response
from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi
from chunyu_project.common_schemas import success_response

from .models import Changelog
from .serializers import ChangelogSerializer


class ChangelogPagination(PageNumberPagination):
    page_size = 10
    page_size_query_param = 'page_size'
    max_page_size = 100

    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 ChangelogViewSet(viewsets.ModelViewSet):
    """更新日志 ViewSet"""
    queryset = Changelog.objects.filter(is_published=True)
    serializer_class = ChangelogSerializer
    permission_classes = [permissions.AllowAny]
    pagination_class = ChangelogPagination
    http_method_names = ['get']

    def get_queryset(self):
        queryset = Changelog.objects.filter(is_published=True)
        update_type = self.request.query_params.get('update_type')
        if update_type:
            queryset = queryset.filter(update_type=update_type)
        return queryset.order_by('-published_at')

    @swagger_auto_schema(
        tags=['更新日志'],
        operation_summary='获取更新日志列表',
        operation_description='获取已发布的更新日志列表，支持分页和按类型筛选',
        manual_parameters=[
            openapi.Parameter('update_type', openapi.IN_QUERY, description='更新类型筛选: new_feature/improvement/bug_fix/other', 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}
    )
    def list(self, request, *args, **kwargs):
        return super().list(request, *args, **kwargs)

    @swagger_auto_schema(
        tags=['更新日志'],
        operation_summary='获取更新日志详情',
        operation_description='获取指定更新日志的详细信息',
        manual_parameters=[
            openapi.Parameter('pk', openapi.IN_PATH, description='更新日志ID', type=openapi.TYPE_INTEGER, required=True),
        ],
        responses={200: success_response}
    )
    def retrieve(self, request, *args, **kwargs):
        return super().retrieve(request, *args, **kwargs)