"""API v2 routes for parser source exports."""

from apps.parsers.models import ParserLoadLog
from apps.parsers.source_registry import PARSER_SOURCES, ParserSourceDescriptor
from apps.parsers.views import SourceResultCsvDownloadView
from django.urls import path

app_name = "parser_sources"


def _download_source_descriptors():
    """Return unique source result routes that support CSV download."""
    seen_routes = set()
    for descriptor in PARSER_SOURCES.values():
        if not descriptor.api_route or descriptor.api_route in seen_routes:
            continue
        seen_routes.add(descriptor.api_route)
        if descriptor.source == ParserLoadLog.Source.FNS_REPORTS:
            continue
        yield descriptor


def _download_view(descriptor: ParserSourceDescriptor):
    class SourceDownloadView(SourceResultCsvDownloadView):
        source_key = descriptor.key

    return SourceDownloadView.as_view()


urlpatterns = []
for source_descriptor in _download_source_descriptors():
    route_name = source_descriptor.api_route.replace("/", "-")
    urlpatterns.append(
        path(
            f"{source_descriptor.api_route}/download/",
            _download_view(source_descriptor),
            name=f"{route_name}-download",
        )
    )