import os
from io import StringIO
from unittest.mock import patch

from django.core.management import call_command
from django.test import Client, TestCase, override_settings
from django.urls import reverse


class HealthzTests(TestCase):
    def test_healthz_ok(self):
        response = Client().get("/healthz/")
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["status"], "ok")


class UnderConstructionTests(TestCase):
    @override_settings(SITE_UNDER_CONSTRUCTION=True)
    def test_home_redirects_when_gated(self):
        response = Client().get("/")
        self.assertEqual(response.status_code, 302)
        self.assertIn("/under-construction", response["Location"])

    @override_settings(SITE_UNDER_CONSTRUCTION=False)
    def test_home_ok_when_open(self):
        response = Client().get("/")
        self.assertEqual(response.status_code, 200)


class PublicSmokeTests(TestCase):
    def test_about_and_contact_get(self):
        client = Client()
        self.assertEqual(client.get(reverse("public:about")).status_code, 200)
        self.assertEqual(client.get(reverse("public:contact")).status_code, 200)
        contact = client.get(reverse("public:contact"))
        self.assertContains(contact, "contact-email")
        self.assertNotContains(contact, "contact-first-name")
        self.assertNotContains(contact, "contact-phone")
        self.assertNotContains(contact, "contact-address-line1")


class DispatchDueTests(TestCase):
    def test_quiet_when_nothing_due(self):
        out = StringIO()
        call_command("dispatch_due", stdout=out)
        self.assertEqual(out.getvalue(), "")


class SeedDemoTests(TestCase):
    def test_refuses_prod(self):
        from django.core.management.base import CommandError

        with patch.dict(os.environ, {"DJANGO_ENV": "prod"}):
            with self.assertRaises(CommandError) as ctx:
                call_command("seed_demo", stdout=StringIO())
        self.assertIn("prod", str(ctx.exception).lower())

    def test_seeds_shop_and_portal_rows(self):
        out = StringIO()
        call_command("seed_demo", stdout=out)
        self.assertIn("Demo seed ready", out.getvalue())
        from contacts.models import Contact
        from leads.models import Lead
        from shop.models import Order, Product

        self.assertTrue(Product.objects.filter(sku="DEMO-NOTEBOOK").exists())
        self.assertTrue(Product.objects.filter(sku="DEMO-PROTO", is_published=False).exists())
        self.assertGreaterEqual(Contact.objects.filter(email__startswith="demo+").count(), 8)
        self.assertTrue(Lead.objects.filter(message__startswith="[demo-seed]").exists())
        self.assertTrue(Order.objects.filter(number="DEMO-ORD-001", status="paid").exists())
        listing = Client().get(reverse("shop:list"))
        self.assertContains(listing, "Notebook")

        from django.contrib.auth import get_user_model
        from shop.models import ProductReview
        from shipping.models import Shipment

        User = get_user_model()
        jordan = User.objects.get(username="demo+jordan@example.com")
        self.assertFalse(jordan.is_staff)
        self.assertTrue(jordan.check_password("Demo-buyer-pass-123"))
        self.assertEqual(
            Order.objects.get(number="DEMO-ORD-001").user_id, jordan.pk
        )
        self.assertIsNone(Order.objects.get(number="DEMO-ORD-004").user_id)
        self.assertTrue(
            ProductReview.objects.filter(
                user=jordan, product__sku="DEMO-NOTEBOOK", rating=5
            ).exists()
        )
        delivered = Shipment.objects.get(order__number="DEMO-ORD-002")
        self.assertEqual(delivered.tracking_status, "delivered")
        self.assertGreaterEqual(len(delivered.tracking_events), 2)
        transit = Shipment.objects.get(order__number="DEMO-ORD-001")
        self.assertEqual(transit.tracking_status, "in_transit")

        client = Client()
        self.assertTrue(
            client.login(
                username="demo+jordan@example.com", password="Demo-buyer-pass-123"
            )
        )
        history = client.get(reverse("account:orders"))
        self.assertContains(history, "DEMO-ORD-001")
        self.assertNotContains(history, "DEMO-ORD-004")
        detail = client.get(reverse("shop:detail", kwargs={"slug": "demo-notebook"}))
        self.assertContains(detail, "Solid notebook")

    def test_second_run_is_idempotent(self):
        call_command("seed_demo", stdout=StringIO())
        from shop.models import Product

        count = Product.objects.filter(sku__startswith="DEMO-").count()
        call_command("seed_demo", stdout=StringIO())
        self.assertEqual(Product.objects.filter(sku__startswith="DEMO-").count(), count)

    def test_reset_rebuilds_tagged_rows(self):
        call_command("seed_demo", stdout=StringIO())
        from shop.models import Product

        Product.objects.filter(sku="DEMO-NOTEBOOK").delete()
        call_command("seed_demo", reset=True, stdout=StringIO())
        self.assertTrue(Product.objects.filter(sku="DEMO-NOTEBOOK").exists())
        from django.contrib.auth import get_user_model

        self.assertTrue(
            get_user_model().objects.filter(username="demo+jordan@example.com").exists()
        )

    @patch.dict(os.environ, {"DJANGO_ENV": "beta"})
    def test_allows_beta(self):
        call_command("seed_demo", stdout=StringIO())
        from shop.models import Product

        self.assertTrue(Product.objects.filter(sku__startswith="DEMO-").exists())

    def test_succeeds_when_shop_not_installed(self):
        from django.apps import apps
        from contacts.models import Contact

        real = apps.is_installed

        def fake(name):
            if name in {"shop", "shipping"}:
                return False
            return real(name)

        with patch("django.apps.apps.is_installed", side_effect=fake):
            call_command("seed_demo", stdout=StringIO())
        self.assertTrue(Contact.objects.filter(email__startswith="demo+").exists())