//go:build integration

package integration_test

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/google/uuid"

	"github.com/alchemistkay/guestguard/internal/api"
	"github.com/alchemistkay/guestguard/internal/notification"
	"github.com/alchemistkay/guestguard/internal/storage"
)

// mustInsertEventAndGuest seeds the bare minimum rows the notifications
// webhook tests need to attach a notification to a real guest.
func mustInsertEventAndGuest(t *testing.T, ctx context.Context, db *storage.DB, hostID uuid.UUID) (uuid.UUID, uuid.UUID) {
	t.Helper()
	var eventID uuid.UUID
	must(t, db.Pool.QueryRow(ctx, `
        INSERT INTO events (host_id, name, slug, event_date)
        VALUES ($1, 'Notif Test', $2, now() + interval '30 day')
        RETURNING id
    `, hostID, fmt.Sprintf("notif-%d", time.Now().UnixNano())).Scan(&eventID),
		"insert event")
	var guestID uuid.UUID
	must(t, db.Pool.QueryRow(ctx, `
        INSERT INTO guests (event_id, name, email)
        VALUES ($1, 'Notif Guest', $2)
        RETURNING id
    `, eventID, fmt.Sprintf("notif-%d@example.test", time.Now().UnixNano())).Scan(&guestID),
		"insert guest")
	return eventID, guestID
}

func setupNotificationsAPI(t *testing.T, ctx context.Context) (*httptest.Server, *storage.DB, *notification.UnsubscribeSigner) {
	t.Helper()
	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
	dsn := startPostgres(t, ctx)

	db, err := storage.NewDB(ctx, dsn)
	must(t, err, "connect db")
	t.Cleanup(db.Close)
	must(t, db.Migrate(ctx), "migrate")

	suppressions := notification.NewSuppressionRepo(db)
	notifRepo := notification.NewRepo(db)
	const secret = "test-unsubscribe-secret-at-least-32-bytes-long"
	signer := notification.NewUnsubscribeSigner(secret)

	apiSrv, err := api.NewServer(api.ServerDeps{
		Logger:               logger,
		DB:                   db,
		TokenTTL:             24 * time.Hour,
		JWTSecret:            testJWTSecret,
		JWTIssuer:            testJWTIssuer,
		AccessTokenTTL:       5 * time.Minute,
		RefreshTokenTTL:      24 * time.Hour,
		EmailVerificationTTL: 1 * time.Hour,
		PasswordResetTTL:     1 * time.Hour,
		PublicBaseURL:        "http://localhost",
		NotificationRepo:     notifRepo,
		SuppressionRepo:      suppressions,
		UnsubscribeSigner:    signer,
	})
	must(t, err, "build api server")
	srv := httptest.NewServer(apiSrv.Handler())
	t.Cleanup(srv.Close)
	return srv, db, signer
}

// TestUnsubscribeFlow exercises the signed-link end-to-end: preview surfaces
// the email, confirm writes the suppression row, and a tampered token is
// rejected.
func TestUnsubscribeFlow(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in -short mode")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
	t.Cleanup(cancel)

	srv, db, signer := setupNotificationsAPI(t, ctx)

	email := "mira@example.test"
	token := signer.Sign(email)

	// Preview returns the bound email.
	var preview struct{ Email string }
	getJSONAuthed(t, srv.URL+"/unsubscribe/"+token, "", http.StatusOK, &preview)
	if preview.Email != email {
		t.Fatalf("preview email: got %q want %q", preview.Email, email)
	}

	// Confirm writes the row.
	assertStatus(t, http.MethodPost, srv.URL+"/unsubscribe/"+token, "", nil, http.StatusOK)

	yep, err := notification.NewSuppressionRepo(db).IsSuppressed(ctx, email)
	must(t, err, "check suppression")
	if !yep {
		t.Fatalf("expected email %s suppressed", email)
	}

	// Tampered token is rejected.
	tampered := token[:len(token)-2] + "xx"
	assertStatus(t, http.MethodGet, srv.URL+"/unsubscribe/"+tampered, "", nil, http.StatusBadRequest)
}

// TestSESBounceWebhook walks the inbound bounce → suppression chain. We
// build a notification row first (so MarkBounce has something to update),
// then post a Bounce envelope, then verify both the status flip and the
// suppression entry.
func TestSESBounceWebhook(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in -short mode")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
	t.Cleanup(cancel)
	srv, db, _ := setupNotificationsAPI(t, ctx)

	// Insert a fake guest + notification with a known provider_message_id.
	hostID := insertHost(t, ctx, db.Pool)
	var eventID, guestID = mustInsertEventAndGuest(t, ctx, db, hostID)
	const msgID = "ses-fake-message-id-1234"
	notifRepo := notification.NewRepo(db)
	_, err := notifRepo.Record(ctx, notification.RecordParams{
		GuestID:           guestID,
		Channel:           notification.ChannelEmail,
		Type:              notification.TypeInvitation,
		Status:            notification.StatusSent,
		ProviderMessageID: msgID,
	})
	must(t, err, "seed notification")
	_ = eventID

	// SES → SNS envelope: outer "Notification" carries inner JSON as a string.
	innerJSON, _ := json.Marshal(map[string]any{
		"notificationType": "Bounce",
		"mail":             map[string]any{"messageId": msgID},
		"bounce": map[string]any{
			"bounceType": "Permanent",
			"bouncedRecipients": []map[string]any{
				{"emailAddress": "bouncer@example.test"},
			},
		},
	})
	envelope, _ := json.Marshal(map[string]any{
		"Type":    "Notification",
		"Message": string(innerJSON),
	})

	req, _ := http.NewRequest(http.MethodPost, srv.URL+"/webhooks/ses/notifications",
		strings.NewReader(string(envelope)))
	req.Header.Set("Content-Type", "application/json")
	resp, err := http.DefaultClient.Do(req)
	must(t, err, "post ses webhook")
	resp.Body.Close()
	if resp.StatusCode != http.StatusNoContent {
		t.Fatalf("expected 204, got %d", resp.StatusCode)
	}

	// Notification row marked as bounced/permanent.
	var status, bounceType string
	must(t, db.Pool.QueryRow(ctx,
		"SELECT status, bounce_type FROM notifications WHERE provider_message_id = $1",
		msgID,
	).Scan(&status, &bounceType), "fetch notification")
	if status != "bounced" || bounceType != "permanent" {
		t.Fatalf("bad row: status=%s bounce_type=%s", status, bounceType)
	}

	// Suppression row populated.
	yep, err := notification.NewSuppressionRepo(db).IsSuppressed(ctx, "bouncer@example.test")
	must(t, err, "check suppression")
	if !yep {
		t.Fatal("expected bouncer email suppressed")
	}
}

// TestTwilioStatusWebhook flips a row's status to delivered.
func TestTwilioStatusWebhook(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in -short mode")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
	t.Cleanup(cancel)
	srv, db, _ := setupNotificationsAPI(t, ctx)

	hostID := insertHost(t, ctx, db.Pool)
	_, guestID := mustInsertEventAndGuest(t, ctx, db, hostID)
	const sid = "SMfake0123456789"
	_, err := notification.NewRepo(db).Record(ctx, notification.RecordParams{
		GuestID:           guestID,
		Channel:           notification.ChannelSMS,
		Type:              notification.TypeInvitation,
		Status:            notification.StatusSent,
		ProviderMessageID: sid,
	})
	must(t, err, "seed notification")

	form := url.Values{}
	form.Set("MessageSid", sid)
	form.Set("MessageStatus", "delivered")
	req, _ := http.NewRequest(http.MethodPost, srv.URL+"/webhooks/twilio/status",
		strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	resp, err := http.DefaultClient.Do(req)
	must(t, err, "post twilio webhook")
	resp.Body.Close()
	if resp.StatusCode != http.StatusNoContent {
		t.Fatalf("expected 204, got %d", resp.StatusCode)
	}

	var status string
	must(t, db.Pool.QueryRow(ctx,
		"SELECT status FROM notifications WHERE provider_message_id = $1", sid,
	).Scan(&status), "fetch status")
	if status != "delivered" {
		t.Fatalf("expected delivered, got %s", status)
	}
}