from django.views.generic import RedirectView
from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static
from backend.ninja_api import ninja_api

# ── Custom error handlers (JSON for API, HTML for browser) ──────────────────
handler400 = "backend.error_views.bad_request_handler"
handler403 = "backend.error_views.forbidden_handler"
handler404 = "backend.error_views.not_found_handler"
handler500 = "backend.error_views.server_error_handler"


# drf-yasg: OpenAPI/Swagger schema generation
from apps.common.views import HealthCheckView, TelemetryMetricsView
from rest_framework import permissions
from drf_yasg.views import get_schema_view
from drf_yasg import openapi
from drf_spectacular.views import SpectacularAPIView, SpectacularRedocView, SpectacularSwaggerView

api_info = openapi.Info(
    title="FASHIONISTAR E-commerce Backend APIs",
    default_version="v1",
    description="API documentation for FASHIONISTAR E-commerce Backend",
    terms_of_service="https://www.google.com/policies/terms/",
    contact=openapi.Contact(email="fashionistarclothings@outlook.com"),
    license=openapi.License(name="BSD License"),
)

# ── Schema view ─────────────────────────────────────────────────────────────
# cache_class uses 'schema' LocMemCache (settings.CACHES['schema']) so the
# Swagger UI homepage does NOT touch Redis. Redis downtime in dev/staging
# will never cause a 500 on GET /.
schema_view = get_schema_view(
    api_info,
    public=True,
    permission_classes=(permissions.AllowAny,),
)


def health_check(request):
    """Kubernetes readiness/liveness probe endpoint."""
    from django.db import connection

    try:
        connection.ensure_connection()
        db_ok = True
    except Exception:
        db_ok = False
    from django.http import JsonResponse

    return JsonResponse(
        {
            "status": "ok" if db_ok else "degraded",
            "service": "fashionistar-api",
            "version": "v1",
            "database": "ok" if db_ok else "error",
        },
        status=200 if db_ok else 503,
    )


urlpatterns = [
    path("health/", health_check, name="health"),
    path(
        "swagger<format>/", schema_view.without_ui(cache_timeout=0), name="schema-json"
    ),
    path("", schema_view.with_ui("swagger", cache_timeout=0), name="schema-swagger-ui"),
    path("redoc/", schema_view.with_ui("redoc", cache_timeout=0), name="schema-redoc"),
    # Canonical DRF OpenAPI docs. DRF uses drf-spectacular AutoSchema in
    # settings, so these routes exercise the same serializer/schema pipeline
    # used by production API documentation. The drf-yasg root stays available
    # temporarily as a legacy compatibility bridge.
    path("api/schema/", SpectacularAPIView.as_view(), name="api-schema"),
    path("api/docs/", SpectacularSwaggerView.as_view(url_name="api-schema"), name="api-docs"),
    path("api/redoc/", SpectacularRedocView.as_view(url_name="api-schema"), name="api-redoc"),
    # ── Health Check ─────────────────────────────────────────────────────────
    # GET /api/v1/health/
    # Used by: AWS ELB, Render.com, Kubernetes probes, Uptime Robot
    path("api/v1/health/", HealthCheckView.as_view(), name="health-check"),
    # ── Django Control Room ──────────────────────────────────────────────────
    path("admin/dj-redis-panel/", include("dj_redis_panel.urls")),
    path("admin/dj-cache-panel/", include("dj_cache_panel.urls")),
    path("admin/dj-urls-panel/", include("dj_urls_panel.urls")),
    path("admin/dj-celery-panel/", include("dj_celery_panel.urls")),
    path("admin/dj-signals-panel/", include("dj_signals_panel.urls")),
    path("admin/dj-control-room/", include("dj_control_room.urls")),

    # Admin URL
    path("admin/", admin.site.urls),

    # ── Canonical ADMIN_BACKEND Domain:  discovery metadata ─
    path("api/v1/admin_backend/", include("apps.admin_backend.urls", namespace="admin_backend")),

    # ── New Modular Monolith (v1) ──────────────────────────────────────────
    path("api/", include("apps.authentication.urls", namespace="authentication")),
    # ── Common Utilities (health check, Cloudinary presign, Cloudinary webhook, metrics, etc.) ────────────────────────
    path("api/", include("apps.common.urls", namespace="common")),
    # ── Phase 2: Client Domain (DRF sync) ─────────────────────────────────────
    path("api/v1/client/", include("apps.client.urls", namespace="client")),
    # ── Phase 2: Vendor Domain (DRF sync) ─────────────────────────────────────
    path("api/v1/vendor/", include("apps.vendor.urls", namespace="vendor_domain")),
    # ── Financial Domains: wallet custody, internal ledger, provider payments ─
    path("api/v1/wallet/", include("apps.wallet.urls", namespace="wallet")),
    path("api/v1/transactions/", include("apps.transactions.urls", namespace="transactions")),
    path("api/v1/payment/", include("apps.payment.urls", namespace="payment")),
    # ── Canonical Catalog Domain: category, brand, collection, discovery metadata ─
    path("api/v1/catalog/", include("apps.catalog.urls", namespace="catalog")),
    # ── Phase 4: Product Catalogue Domain ──────────────────────────────────────
    path("api/v1/products/", include("apps.product.urls", namespace="product")),

    # ── Phase 4: Order Lifecycle Domain ───────────────────────────────────────
    path("api/v1/orders/", include("apps.order.urls", namespace="order")),
    # ── Phase 4: Notification Feed Domain ─────────────────────────────────────
    path("api/v1/notifications/", include("apps.notification.urls", namespace="notification")),
    # ── Phase 4: Body Measurements Domain ────────────────────────────────────
    path("api/v1/measurements/", include("apps.measurements.urls", namespace="measurements")),
    # ── Phase 5 (P1): Real-Time Chat Messaging Domain ────────────────────────
    path("api/v1/chat/", include("apps.chat.urls", namespace="chat")),
    # ── Phase 5 (P2): Support Tickets & Dispute Domain ───────────────────────
    path("api/v1/support/", include("apps.support.urls", namespace="support")),
    # ── Phase 6: Identity Verification (KYC) Domain ──────────
    path("api/v1/kyc/", include("apps.kyc.urls", namespace="kyc")),
    # ── Phase 7: Integrations, Chatbot & Analytics Domains ───
    path("api/v1/integrations/", include("apps.integrations.urls", namespace="integrations")),
    path("api/v1/chatbot/", include("apps.chatbot.urls", namespace="chatbot")),
    path("api/v1/analytics/", include("apps.analytics.urls", namespace="analytics")),
    # ── Phase 2: Central Async Ninja API (/api/v1/ninja/*) ───────────────────
    path("api/v1/ninja/", ninja_api.urls),

    # ── Monitoring Standard Paths ────────────────────────────────────────────
    # /metrics — Prometheus scrape endpoint (direct view, no redirect for low latency)
    path("metrics", TelemetryMetricsView.as_view(), name="metrics-root"),
    # /healthz — Kubernetes/Cloud health probe alias
    path("healthz", health_check, name="healthz"),
    # /prometheus — alias for monitoring tools that expect this path
    path("prometheus", TelemetryMetricsView.as_view(), name="prometheus-root"),
]


# ====================================================================================

# ====================================================================================
# *** EDIT 3: CONDITIONAL STATIC FILE SERVING ***
# - Serving media files is fine, though in prod, Cloudinary handles it fully.
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
# urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)


# - STATIC files MUST only be served by the Django development server when DEBUG=True.
# - When DEBUG=False, Cloudinary/STATICFILES_STORAGE handles it, so this block is not run.
if settings.DEBUG:
    urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
# ====================================================================================