package bookings

import (
	"context"
	"testing"
	"time"

	"bookra/apps/backend/internal/db"
	"bookra/apps/backend/internal/domain"
)

func newBookingFixture(t *testing.T, repo *db.MemoryRepository) db.BookingRecord {
	t.Helper()
	created, err := repo.CreateBooking(context.Background(), db.CreateBookingParams{
		TenantID:      "5d6b3551-0a3e-4b86-bdf0-e9df20a47148",
		CustomerName:  "Test Customer",
		CustomerEmail: "customer@example.com",
		StartsAt:      time.Now().Add(24 * time.Hour),
		EndsAt:        time.Now().Add(25 * time.Hour),
		Status:        "confirmed",
		Reference:     "BOK-TEST-1",
		ManageToken:   "secret-manage-token",
	})
	if err != nil {
		t.Fatalf("create booking: %v", err)
	}
	booking, err := repo.GetBookingByReference(context.Background(), created.Reference)
	if err != nil {
		t.Fatalf("get booking: %v", err)
	}
	return booking
}

func TestGetBookingRequiresManageToken(t *testing.T) {
	repo := db.NewMemoryRepository()
	booking := newBookingFixture(t, repo)
	svc := NewCustomerService(repo, nil, "http://localhost:3000")

	if _, err := svc.GetBookingByReference(context.Background(), booking.Reference, ""); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized for missing token, got %v", err)
	}
	if _, err := svc.GetBookingByReference(context.Background(), booking.Reference, "wrong"); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized for wrong token, got %v", err)
	}
	view, err := svc.GetBookingByReference(context.Background(), booking.Reference, "secret-manage-token")
	if err != nil {
		t.Fatalf("expected authorized view, got %v", err)
	}
	if view.Reference != booking.Reference {
		t.Fatalf("expected reference %s, got %s", booking.Reference, view.Reference)
	}
}

func TestRescheduleRequiresManageToken(t *testing.T) {
	repo := db.NewMemoryRepository()
	booking := newBookingFixture(t, repo)
	svc := NewCustomerService(repo, nil, "http://localhost:3000")

	req := domain.RescheduleBookingRequest{
		NewStartsAt: time.Now().Add(48 * time.Hour).Format(time.RFC3339),
		NewEndsAt:   time.Now().Add(49 * time.Hour).Format(time.RFC3339),
	}
	if err := svc.RescheduleBooking(context.Background(), booking.Reference, req, ""); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized, got %v", err)
	}
	if err := svc.RescheduleBooking(context.Background(), booking.Reference, req, "wrong"); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized, got %v", err)
	}
}

func TestCancelRequiresManageToken(t *testing.T) {
	repo := db.NewMemoryRepository()
	booking := newBookingFixture(t, repo)
	svc := NewCustomerService(repo, nil, "http://localhost:3000")

	if err := svc.CancelBooking(context.Background(), booking.Reference, ""); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized, got %v", err)
	}
	if err := svc.CancelBooking(context.Background(), booking.Reference, "wrong"); err != ErrUnauthorized {
		t.Fatalf("expected ErrUnauthorized, got %v", err)
	}
	if err := svc.CancelBooking(context.Background(), booking.Reference, "secret-manage-token"); err != nil {
		t.Fatalf("expected successful cancel, got %v", err)
	}
}

func TestRescheduleRejectsConflictingSlot(t *testing.T) {
	repo := db.NewMemoryRepository()
	svc := NewCustomerService(repo, nil, "http://localhost:3000")
	base := time.Now().Add(48 * time.Hour)

	// Existing booking in the same tenant occupying the target slot.
	_, err := repo.CreateBooking(context.Background(), db.CreateBookingParams{
		TenantID:    "5d6b3551-0a3e-4b86-bdf0-e9df20a47148",
		StartsAt:    base,
		EndsAt:      base.Add(time.Hour),
		Status:      "confirmed",
		Reference:   "BOK-OCCUPIED",
		ManageToken: "token-a",
	})
	if err != nil {
		t.Fatalf("create occupying booking: %v", err)
	}

	booking := newBookingFixture(t, repo)
	err = svc.RescheduleBooking(context.Background(), booking.Reference, domain.RescheduleBookingRequest{
		NewStartsAt: base.Add(30 * time.Minute).Format(time.RFC3339), // overlaps BOK-OCCUPIED
		NewEndsAt:   base.Add(90 * time.Minute).Format(time.RFC3339),
	}, "secret-manage-token")
	if err != ErrBookingConflict {
		t.Fatalf("expected ErrBookingConflict, got %v", err)
	}
}