package webpush_test

import (
	"fmt"
	"net/netip"
	"testing"
	"time"

	"github.com/stretchr/testify/require"
	"heckel.io/ntfy/v2/webpush"
)

const testWebPushEndpoint = "https://updates.push.services.mozilla.com/wpush/v1/AAABBCCCDDEEEFFF"

func testStoreUpsertSubscriptionSubscriptionsForTopic(t *testing.T, store webpush.Store) {
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"test-topic", "mytopic"}))

	subs, err := store.SubscriptionsForTopic("test-topic")
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, subs[0].Endpoint, testWebPushEndpoint)
	require.Equal(t, subs[0].P256dh, "p256dh-key")
	require.Equal(t, subs[0].Auth, "auth-key")
	require.Equal(t, subs[0].UserID, "u_1234")

	subs2, err := store.SubscriptionsForTopic("mytopic")
	require.Nil(t, err)
	require.Len(t, subs2, 1)
	require.Equal(t, subs[0].Endpoint, subs2[0].Endpoint)
}

func testStoreUpsertSubscriptionSubscriberIPLimitReached(t *testing.T, store webpush.Store) {
	// Insert 10 subscriptions with the same IP address
	for i := 0; i < 10; i++ {
		endpoint := fmt.Sprintf(testWebPushEndpoint+"%d", i)
		require.Nil(t, store.UpsertSubscription(endpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"test-topic", "mytopic"}))
	}

	// Another one for the same endpoint should be fine
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"0", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"test-topic", "mytopic"}))

	// But with a different endpoint it should fail
	require.Equal(t, webpush.ErrWebPushTooManySubscriptions, store.UpsertSubscription(testWebPushEndpoint+"11", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"test-topic", "mytopic"}))

	// But with a different IP address it should be fine again
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"99", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("9.9.9.9"), []string{"test-topic", "mytopic"}))
}

func testStoreUpsertSubscriptionUpdateTopics(t *testing.T, store webpush.Store) {
	// Insert subscription with two topics, and another with one topic
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"0", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"1", "auth-key", "p256dh-key", "", netip.MustParseAddr("9.9.9.9"), []string{"topic1"}))

	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 2)
	require.Equal(t, testWebPushEndpoint+"0", subs[0].Endpoint)
	require.Equal(t, testWebPushEndpoint+"1", subs[1].Endpoint)

	subs, err = store.SubscriptionsForTopic("topic2")
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, testWebPushEndpoint+"0", subs[0].Endpoint)

	// Update the first subscription to have only one topic
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"0", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1"}))

	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 2)
	require.Equal(t, testWebPushEndpoint+"0", subs[0].Endpoint)

	subs, err = store.SubscriptionsForTopic("topic2")
	require.Nil(t, err)
	require.Len(t, subs, 0)
}

func testStoreUpsertSubscriptionUpdateFields(t *testing.T, store webpush.Store) {
	// Insert a subscription
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1"}))

	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, "auth-key", subs[0].Auth)
	require.Equal(t, "p256dh-key", subs[0].P256dh)
	require.Equal(t, "u_1234", subs[0].UserID)

	// Re-upsert the same endpoint with different auth, p256dh, and userID
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "new-auth", "new-p256dh", "u_5678", netip.MustParseAddr("1.2.3.4"), []string{"topic1"}))

	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, testWebPushEndpoint, subs[0].Endpoint)
	require.Equal(t, "new-auth", subs[0].Auth)
	require.Equal(t, "new-p256dh", subs[0].P256dh)
	require.Equal(t, "u_5678", subs[0].UserID)
}

func testStoreRemoveByUserIDMultiple(t *testing.T, store webpush.Store) {
	// Insert two subscriptions for u_1234 and one for u_5678
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"0", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1"}))
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"1", "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1"}))
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint+"2", "auth-key", "p256dh-key", "u_5678", netip.MustParseAddr("9.9.9.9"), []string{"topic1"}))

	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 3)

	// Remove all subscriptions for u_1234
	require.Nil(t, store.RemoveSubscriptionsByUserID("u_1234"))

	// Only u_5678's subscription should remain
	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, testWebPushEndpoint+"2", subs[0].Endpoint)
	require.Equal(t, "u_5678", subs[0].UserID)
}

func testStoreRemoveByEndpoint(t *testing.T, store webpush.Store) {
	// Insert subscription with two topics
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))
	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)

	// And remove it again
	require.Nil(t, store.RemoveSubscriptionsByEndpoint(testWebPushEndpoint))
	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 0)
}

func testStoreRemoveByUserID(t *testing.T, store webpush.Store) {
	// Insert subscription with two topics
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))
	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)

	// And remove it again
	require.Nil(t, store.RemoveSubscriptionsByUserID("u_1234"))
	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 0)
}

func testStoreRemoveByUserIDEmpty(t *testing.T, store webpush.Store) {
	require.Equal(t, webpush.ErrWebPushUserIDCannotBeEmpty, store.RemoveSubscriptionsByUserID(""))
}

func testStoreExpiryWarningSent(t *testing.T, store webpush.Store, setUpdatedAt func(endpoint string, updatedAt int64) error) {
	// Insert subscription with two topics
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))

	// Set updated_at to the past so it shows up as expiring
	require.Nil(t, setUpdatedAt(testWebPushEndpoint, time.Now().Add(-8*24*time.Hour).Unix()))

	// Verify subscription appears in expiring list (warned_at == 0)
	subs, err := store.SubscriptionsExpiring(7 * 24 * time.Hour)
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, testWebPushEndpoint, subs[0].Endpoint)

	// Mark them as warning sent
	require.Nil(t, store.MarkExpiryWarningSent(subs))

	// Verify subscription no longer appears in expiring list (warned_at > 0)
	subs, err = store.SubscriptionsExpiring(7 * 24 * time.Hour)
	require.Nil(t, err)
	require.Len(t, subs, 0)
}

func testStoreExpiring(t *testing.T, store webpush.Store, setUpdatedAt func(endpoint string, updatedAt int64) error) {
	// Insert subscription with two topics
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))
	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)

	// Fake-mark them as soon-to-expire
	require.Nil(t, setUpdatedAt(testWebPushEndpoint, time.Now().Add(-8*24*time.Hour).Unix()))

	// Should not be cleaned up yet
	require.Nil(t, store.RemoveExpiredSubscriptions(9*24*time.Hour))

	// Run expiration
	subs, err = store.SubscriptionsExpiring(7 * 24 * time.Hour)
	require.Nil(t, err)
	require.Len(t, subs, 1)
	require.Equal(t, testWebPushEndpoint, subs[0].Endpoint)
}

func testStoreRemoveExpired(t *testing.T, store webpush.Store, setUpdatedAt func(endpoint string, updatedAt int64) error) {
	// Insert subscription with two topics
	require.Nil(t, store.UpsertSubscription(testWebPushEndpoint, "auth-key", "p256dh-key", "u_1234", netip.MustParseAddr("1.2.3.4"), []string{"topic1", "topic2"}))
	subs, err := store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 1)

	// Fake-mark them as expired
	require.Nil(t, setUpdatedAt(testWebPushEndpoint, time.Now().Add(-10*24*time.Hour).Unix()))

	// Run expiration
	require.Nil(t, store.RemoveExpiredSubscriptions(9*24*time.Hour))

	// List again, should be 0
	subs, err = store.SubscriptionsForTopic("topic1")
	require.Nil(t, err)
	require.Len(t, subs, 0)
}