from django.http import HttpResponse
from rest_framework import status
from rest_framework.views import APIView

from apps.reports.serializers import ReportGenerateSerializer
from apps.reports.services.excel import build_report_workbook
from apps.reports.services.orchestrator import ReportOrchestrator


class GenerateReportView(APIView):
    authentication_classes = []
    permission_classes = []

    def post(self, request):
        serializer = ReportGenerateSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

        orchestrator = ReportOrchestrator()
        report_data = orchestrator.generate(serializer.validated_data)
        workbook = build_report_workbook(
            title=report_data["title"],
            columns=report_data["columns"],
            rows=report_data["rows"],
        )

        response = HttpResponse(
            workbook,
            content_type=(
                "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
            ),
            status=status.HTTP_200_OK,
        )
        response["Content-Disposition"] = (
            f'attachment; filename="{report_data["filename"]}"'
        )
        return response