//go:build test && dev

package payments

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"sync"
	"testing"
	"time"

	"crussell/db"
	"crussell/internal/square"
	"crussell/mw"
	"crussell/testutils"
	"crussell/testutils/fixtures"
	"crussell/testutils/jwt"

	"github.com/go-chi/chi/v5"
	"github.com/stretchr/testify/assert"
)

// =============================================================================
// Unit tests — IsValidBookingStatusForPayment (pure function, no DB)
// =============================================================================

func TestIsValidBookingStatusForPayment_Confirmed(t *testing.T) {
	t.Parallel()
	if !IsValidBookingStatusForPayment("confirmed") {
		t.Error("expected 'confirmed' to be valid for payment")
	}
}

func TestIsValidBookingStatusForPayment_Pending(t *testing.T) {
	t.Parallel()
	if !IsValidBookingStatusForPayment("pending") {
		t.Error("expected 'pending' to be valid for payment")
	}
}

func TestIsValidBookingStatusForPayment_PendingRelease(t *testing.T) {
	t.Parallel()
	if !IsValidBookingStatusForPayment("pending_release") {
		t.Error("expected 'pending_release' to be valid for payment")
	}
}

func TestIsValidBookingStatusForPayment_InProgress(t *testing.T) {
	t.Parallel()
	if !IsValidBookingStatusForPayment("in_progress") {
		t.Error("expected 'in_progress' to be valid for payment")
	}
}

func TestIsValidBookingStatusForPayment_RejectsDepositLapsed(t *testing.T) {
	t.Parallel()
	if IsValidBookingStatusForPayment("deposit_lapsed") {
		t.Error("expected 'deposit_lapsed' to be rejected for payment")
	}
}

func TestIsValidBookingStatusForPayment_RejectsClientCancelled(t *testing.T) {
	t.Parallel()
	if IsValidBookingStatusForPayment("client_cancelled") {
		t.Error("expected 'client_cancelled' to be rejected for payment")
	}
}

func TestIsValidBookingStatusForPayment_RejectsWeCancelled(t *testing.T) {
	t.Parallel()
	if IsValidBookingStatusForPayment("we_cancelled") {
		t.Error("expected 'we_cancelled' to be rejected for payment")
	}
}

func TestIsValidBookingStatusForPayment_RejectsCompleted(t *testing.T) {
	t.Parallel()
	if IsValidBookingStatusForPayment("completed") {
		t.Error("expected 'completed' to be rejected for payment")
	}
}

func TestIsValidBookingStatusForPayment_RejectsNoShow(t *testing.T) {
	t.Parallel()
	if IsValidBookingStatusForPayment("no_show") {
		t.Error("expected 'no_show' to be rejected for payment")
	}
}

// =============================================================================
// Integration tests — CreateBookingPayment status guard
// =============================================================================

// setupPaymentStatusTest creates a user, service, and booking with the given
// status, returning the userID, bookingID, and user token.
func setupPaymentStatusTest(t *testing.T, ctx context.Context, q db.Querier, status string) (string, string, string) {
	t.Helper()

	userID, err := fixtures.CreateTestUser(q)
	if err != nil {
		t.Fatalf("failed to create test user: %v", err)
	}

	serviceID, err := fixtures.CreateTestService(q)
	if err != nil {
		t.Fatalf("failed to create test service: %v", err)
	}

	// Use a far-future date so the booking is never in the cleanup window.
	bookingID, err := fixtures.CreateTestBookingAtTime(q, userID, serviceID, time.Date(2099, 12, 31, 10, 0, 0, 0, time.UTC))
	if err != nil {
		t.Fatalf("failed to create test booking: %v", err)
	}

	_, err = q.Exec(ctx, "UPDATE bookings SET status = $1 WHERE id = $2", status, bookingID)
	if err != nil {
		t.Fatalf("failed to set booking status to %q: %v", status, err)
	}

	userToken := jwt.GenerateUserToken(userID)
	return userID, bookingID, userToken
}

func TestCreateBookingPayment_AcceptsPendingRelease(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending_release")

	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "deposit",
		NewCardToken:   &cardToken,
		SaveCard:       true,
		IdempotencyKey: "deposit-pending-release-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusOK {
		t.Errorf("expected status 200 for pending_release booking, got %d. body: %s", w.Code, w.Body.String())
	}

	// Verify the booking was promoted back to confirmed.
	var status string
	err := tx.QueryRow(ctx,
		"SELECT status FROM bookings WHERE id = $1", bookingID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query booking status: %v", err)
	}
	if status != "confirmed" {
		t.Errorf("expected booking promoted from pending_release to 'confirmed', got %q", status)
	}
}

func TestCreateBookingPayment_ThresholdMet_SmallPaymentPromotes(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending_release")

	// Pay 15% (£7.50 on a £50 booking) — below 20% threshold.
	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         750, // £7.50 = 15% of £50
		PaymentType:    "partial",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "below-threshold-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
	}

	// Payment below 20% threshold — booking should remain pending_release.
	var status string
	err := tx.QueryRow(ctx,
		"SELECT status FROM bookings WHERE id = $1", bookingID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query booking: %v", err)
	}
	if status != "pending_release" {
		t.Errorf("expected booking to remain pending_release, got %q", status)
	}
}

func TestCreateBookingPayment_ThresholdMet_BalancePaymentPromotes(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending_release")

	// Pay £25 via "balance" type — still should meet the 20% threshold.
	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500, // £25.00 = 50% of £50
		PaymentType:    "balance",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "balance-promotes-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
	}

	var status string
	err := tx.QueryRow(ctx,
		"SELECT status FROM bookings WHERE id = $1", bookingID).Scan(&status)
	if err != nil {
		t.Fatalf("failed to query booking: %v", err)
	}
	if status != "confirmed" {
		t.Errorf("expected booking promoted to 'confirmed', got %q", status)
	}
}

func TestCreateBookingPayment_AcceptsConfirmed(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "confirmed")

	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "deposit",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "deposit-confirmed-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusOK {
		t.Errorf("expected status 200 for confirmed booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestCreateBookingPayment_RejectsPending(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending")

	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "deposit",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "deposit-pending-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusConflict {
		t.Errorf("expected status 409 for pending booking (not yet confirmed), got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestCreateBookingPayment_RejectsDepositLapsed(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "deposit_lapsed")

	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "deposit",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "reject-lapsed-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusConflict {
		t.Errorf("expected status 409 for deposit_lapsed booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestCreateBookingPayment_RejectsClientCancelled(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "client_cancelled")

	cardToken := "cnon:test-card-nonce"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "deposit",
		NewCardToken:   &cardToken,
		SaveCard:       false,
		IdempotencyKey: "reject-cancelled-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)

	if w.Code != http.StatusConflict {
		t.Errorf("expected status 409 for client_cancelled booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// Payment Lock Tests
// =============================================================================

func paymentLockRequest(method, path string, token string, baseCtx ...context.Context) *httptest.ResponseRecorder {
	w := httptest.NewRecorder()
	req := httptest.NewRequest(method, path, nil)
	req.Header.Set("Authorization", "Bearer "+token)

	rctx := chi.NewRouteContext()
	bookingID, _ := extractPaymentIDFromPath(path)
	rctx.URLParams.Add("id", bookingID)

	ctx := context.Background()
	if len(baseCtx) > 0 {
		ctx = baseCtx[0]
	}
	ctx = context.WithValue(ctx, chi.RouteCtxKey, rctx)

	if token != "" {
		if info := extractUserFromTestJWT(token); info != nil {
			ctx = context.WithValue(ctx, mw.UserIDKey, info.userID)
			ctx = context.WithValue(ctx, mw.UserRoleKey, info.role)
		}
	}

	AcquirePaymentLock(w, req.WithContext(ctx))
	return w
}

func TestAcquirePaymentLock_Confirmed(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "confirmed")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusOK {
		t.Errorf("expected 200 for confirmed booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_InProgress(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "in_progress")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusOK {
		t.Errorf("expected 200 for in_progress booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_PendingRelease(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending_release")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusOK {
		t.Errorf("expected 200 for pending_release booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsDepositLapsed(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "deposit_lapsed")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for deposit_lapsed booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsClientCancelled(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "client_cancelled")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for client_cancelled booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsWeCancelled(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "we_cancelled")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for we_cancelled booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsNoShow(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "no_show")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for no_show booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsPending(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "pending")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for pending booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestAcquirePaymentLock_RejectsCompleted(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "completed")
	w := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusConflict {
		t.Errorf("expected 409 for completed booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// ReleasePaymentLock — DELETE /api/bookings/{id}/payment-lock
// =============================================================================

func releasePaymentLockRequest(path string, token string, baseCtx ...context.Context) *httptest.ResponseRecorder {
	w := httptest.NewRecorder()
	req := httptest.NewRequest("DELETE", path, nil)
	req.Header.Set("Authorization", "Bearer "+token)

	rctx := chi.NewRouteContext()
	bookingID, _ := extractPaymentIDFromPath(path)
	rctx.URLParams.Add("id", bookingID)

	ctx := context.Background()
	if len(baseCtx) > 0 {
		ctx = baseCtx[0]
	}
	ctx = context.WithValue(ctx, chi.RouteCtxKey, rctx)

	if token != "" {
		if info := extractUserFromTestJWT(token); info != nil {
			ctx = context.WithValue(ctx, mw.UserIDKey, info.userID)
			ctx = context.WithValue(ctx, mw.UserRoleKey, info.role)
		}
	}

	ReleasePaymentLock(w, req.WithContext(ctx))
	return w
}

func TestReleasePaymentLock_HappyPath(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "confirmed")

	// First, acquire the lock to create a PAYMENT_IN_FLIGHT time_blocker
	lockW := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if lockW.Code != http.StatusOK {
		t.Fatalf("expected 200 when acquiring lock, got %d", lockW.Code)
	}

	// Verify the lock exists in the DB
	var lockCount int
	err := tx.QueryRow(ctx,
		"SELECT COUNT(*) FROM time_blockers WHERE description = 'PAYMENT_IN_FLIGHT:' || $1", bookingID).Scan(&lockCount)
	if err != nil {
		t.Fatalf("failed to query time_blockers: %v", err)
	}
	if lockCount != 1 {
		t.Fatalf("expected 1 time_blocker before release, got %d", lockCount)
	}

	// Now release the lock
	w := releasePaymentLockRequest("/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusNoContent {
		t.Errorf("expected 204 No Content, got %d. body: %s", w.Code, w.Body.String())
	}

	// Verify the lock was removed from the DB
	err = tx.QueryRow(ctx,
		"SELECT COUNT(*) FROM time_blockers WHERE description = 'PAYMENT_IN_FLIGHT:' || $1", bookingID).Scan(&lockCount)
	if err != nil {
		t.Fatalf("failed to query time_blockers after release: %v", err)
	}
	if lockCount != 0 {
		t.Errorf("expected 0 time_blockers after release, got %d", lockCount)
	}
}

func TestReleasePaymentLock_NoExistingLock(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "confirmed")

	// Release without acquiring first — should be idempotent (204)
	w := releasePaymentLockRequest("/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusNoContent {
		t.Errorf("expected 204 No Content for idempotent release, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestReleasePaymentLock_InvalidBookingID(t *testing.T) {
	w := releasePaymentLockRequest("/api/bookings/invalid/payment-lock", "")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid booking ID, got %d. body: %s", w.Code, w.Body.String())
	}
}

func TestReleasePaymentLock_EmptyBookingID(t *testing.T) {
	w := releasePaymentLockRequest("/api/bookings//payment-lock", "")
	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for empty booking ID, got %d. body: %s", w.Code, w.Body.String())
	}
}
func TestReleasePaymentLock_AfterMultipleAcquires(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	_, bookingID, userToken := setupPaymentStatusTest(t, ctx, tx, "confirmed")

	// Acquire the lock twice — AcquirePaymentLock should be idempotent
	lockW := paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if lockW.Code != http.StatusOK {
		t.Fatalf("expected 200 on first acquire, got %d", lockW.Code)
	}
	lockW = paymentLockRequest("POST", "/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if lockW.Code != http.StatusOK {
		t.Fatalf("expected 200 on second acquire, got %d", lockW.Code)
	}

	// Release should still succeed
	w := releasePaymentLockRequest("/api/bookings/"+bookingID+"/payment-lock", userToken, ctx)
	if w.Code != http.StatusNoContent {
		t.Errorf("expected 204 No Content after multiple acquires, got %d. body: %s", w.Code, w.Body.String())
	}

	// Verify all locks are gone
	var lockCount int
	err := tx.QueryRow(ctx,
		"SELECT COUNT(*) FROM time_blockers WHERE description = 'PAYMENT_IN_FLIGHT:' || $1", bookingID).Scan(&lockCount)
	if err != nil {
		t.Fatalf("failed to query time_blockers: %v", err)
	}
	if lockCount != 0 {
		t.Errorf("expected 0 time_blockers after release, got %d", lockCount)
	}
}

// =============================================================================
// GetCheckoutStatus — COMPLETED/Pending paths (via wrapper client)
// =============================================================================

// testCheckoutClient wraps square.SquareClient to generate checkout IDs that
// pass validators.IsValidID (12-char hex). The mock generates IDs like
// "chk_mock_..." which fail that check, so we map valid hex IDs to mock IDs.
type testCheckoutClient struct {
	square.SquareClient
	mu     sync.Mutex
	hexIDs map[string]string
	idSeq  int
}

func (c *testCheckoutClient) CreateCheckout(ctx context.Context, req square.CreateCheckoutReq) (*square.CheckoutResult, error) {
	result, err := c.SquareClient.CreateCheckout(ctx, req)
	if err != nil {
		return nil, err
	}
	c.mu.Lock()
	c.idSeq++
	hexID := fmt.Sprintf("%012x", c.idSeq)
	c.hexIDs[hexID] = result.ID
	c.mu.Unlock()
	result.ID = hexID
	return result, nil
}

func (c *testCheckoutClient) GetCheckout(ctx context.Context, checkoutID string) (*square.PaymentResult, error) {
	c.mu.Lock()
	mockID, ok := c.hexIDs[checkoutID]
	c.mu.Unlock()
	if ok {
		checkoutID = mockID
	}
	return c.SquareClient.GetCheckout(ctx, checkoutID)
}

func TestGetCheckoutStatus_Pending(t *testing.T) {
	// NOTE: This test is skipped because the mock's goroutine completes instantly
	// when GO_TESTING=1 (mockSleep is a no-op). By the time we call
	// GetCheckoutStatus, the checkout is already COMPLETED. The PENDING state is
	// only observable with real Square (3s delay) or when mockSleep actually sleeps.
	// The underlying paths are exercised by TestGetCheckoutStatus_Completed and
	// the existing TestGetTillCheckoutStatus_Pending test.
	t.Skip("mock goroutine completes instantly in test mode; PENDING state not observable")
}

func TestGetCheckoutStatus_Completed(t *testing.T) {
	origClient := SquareClient
	SquareClient = &testCheckoutClient{
		SquareClient: origClient,
		hexIDs:       make(map[string]string),
	}
	defer func() { SquareClient = origClient }()

	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, _ := setupTestData(t, ctx, tx)
	adminToken := jwt.GenerateAdminToken()

	handler := CreateTerminalPayment
	req := CreateTerminalPaymentRequest{
		Amount:      5000,
		PaymentType: "full",
	}
	w := makePaymentRequest(handler, "POST", "/api/admin/bookings/"+bookingID+"/payment", req, adminToken, ctx)
	if w.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d. body: %s", w.Code, w.Body.String())
	}

	var createResp CheckoutResponse
	if err := json.NewDecoder(w.Body).Decode(&createResp); err != nil {
		t.Fatalf("failed to decode create response: %v", err)
	}
	if createResp.CheckoutID == "" {
		t.Fatal("expected checkout_id to be set")
	}

	// Poll for the mock goroutine to complete using assert.Eventually
	var resp PaymentStatusResponse
	assert.Eventually(t, func() bool {
		statusReq := httptest.NewRequest("GET", "/api/admin/payments/"+createResp.CheckoutID+"/status?booking_id="+bookingID, nil)
		statusRCtx := chi.NewRouteContext()
		statusRCtx.URLParams.Add("checkout_id", createResp.CheckoutID)
		statusCtx := context.WithValue(ctx, chi.RouteCtxKey, statusRCtx)
		if info := extractUserFromTestJWT(adminToken); info != nil {
			statusCtx = context.WithValue(statusCtx, mw.UserIDKey, info.userID)
			statusCtx = context.WithValue(statusCtx, mw.UserRoleKey, info.role)
		}
		statusReq = statusReq.WithContext(statusCtx)

		w2 := httptest.NewRecorder()
		GetCheckoutStatus(w2, statusReq)
		if w2.Code != http.StatusOK {
			return false
		}
		if err := json.NewDecoder(w2.Body).Decode(&resp); err != nil {
			return false
		}
		return resp.Status == "COMPLETED"
	}, 10*time.Second, 200*time.Millisecond, "expected checkout to complete")
	if resp.PaymentID == "" {
		t.Error("expected payment_id to be set")
	}
	if resp.CardBrand == "" {
		t.Error("expected card_brand to be set")
	}
	if resp.CardLast4 == "" {
		t.Error("expected card_last4 to be set")
	}
}

// pollCheckoutStatus polls GetCheckoutStatus until the checkout reports
// COMPLETED, returning the decoded response.
func pollCheckoutStatus(t *testing.T, ctx context.Context, checkoutID, bookingID, adminToken string) PaymentStatusResponse {
	t.Helper()
	var resp PaymentStatusResponse
	assert.Eventually(t, func() bool {
		statusReq := httptest.NewRequest("GET", "/api/admin/payments/"+checkoutID+"/status?booking_id="+bookingID, nil)
		statusRCtx := chi.NewRouteContext()
		statusRCtx.URLParams.Add("checkout_id", checkoutID)
		statusCtx := context.WithValue(ctx, chi.RouteCtxKey, statusRCtx)
		if info := extractUserFromTestJWT(adminToken); info != nil {
			statusCtx = context.WithValue(statusCtx, mw.UserIDKey, info.userID)
			statusCtx = context.WithValue(statusCtx, mw.UserRoleKey, info.role)
		}
		statusReq = statusReq.WithContext(statusCtx)

		w2 := httptest.NewRecorder()
		GetCheckoutStatus(w2, statusReq)
		if w2.Code != http.StatusOK {
			return false
		}
		if err := json.NewDecoder(w2.Body).Decode(&resp); err != nil {
			return false
		}
		return resp.Status == "COMPLETED"
	}, 10*time.Second, 200*time.Millisecond, "expected checkout to complete")
	return resp
}

// createTerminalCheckout creates a terminal checkout via CreateTerminalPayment
// and returns the checkout ID from the response.
func createTerminalCheckout(t *testing.T, ctx context.Context, bookingID, adminToken string, amount int64) string {
	t.Helper()
	handler := CreateTerminalPayment
	req := CreateTerminalPaymentRequest{
		Amount:      amount,
		PaymentType: "full",
	}
	w := makePaymentRequest(handler, "POST", "/api/admin/bookings/"+bookingID+"/payment", req, adminToken, ctx)
	if w.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d. body: %s", w.Code, w.Body.String())
	}
	var createResp CheckoutResponse
	if err := json.NewDecoder(w.Body).Decode(&createResp); err != nil {
		t.Fatalf("failed to decode create response: %v", err)
	}
	if createResp.CheckoutID == "" {
		t.Fatal("expected checkout_id to be set")
	}
	return createResp.CheckoutID
}

func TestGetCheckoutStatus_DoublePoll_SinglePaymentRow(t *testing.T) {
	// A double poll of the same terminal checkout must return the existing
	// payment row instead of inserting a duplicate (which previously 500'd on
	// the idempotency-key UNIQUE violation after the customer had paid).
	origClient := SquareClient
	SquareClient = &testCheckoutClient{
		SquareClient: origClient,
		hexIDs:       make(map[string]string),
	}
	defer func() { SquareClient = origClient }()

	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, _ := setupTestData(t, ctx, tx)
	adminToken := jwt.GenerateAdminToken()

	checkoutID := createTerminalCheckout(t, ctx, bookingID, adminToken, 5000)

	first := pollCheckoutStatus(t, ctx, checkoutID, bookingID, adminToken)
	if first.PaymentID == "" {
		t.Fatal("expected payment_id from first poll")
	}

	// Second poll of the same checkout — deduped against the existing row.
	second := pollCheckoutStatus(t, ctx, checkoutID, bookingID, adminToken)
	if second.PaymentID == "" {
		t.Fatal("expected payment_id from second poll")
	}
	if second.PaymentID != first.PaymentID {
		t.Errorf("expected same payment_id on re-poll, got %q then %q", first.PaymentID, second.PaymentID)
	}

	var rowCount int
	err := tx.QueryRow(ctx, "SELECT COUNT(*) FROM payments WHERE booking_id = $1", bookingID).Scan(&rowCount)
	if err != nil {
		t.Fatalf("failed to count payment rows: %v", err)
	}
	if rowCount != 1 {
		t.Errorf("expected exactly 1 payment row after double poll, got %d", rowCount)
	}
}

func TestGetCheckoutStatus_TwoEqualAmountCharges_NoCollision(t *testing.T) {
	// Two distinct terminal charges on the same booking with the same final
	// amount must each create their own payment row (the deposit + equal-amount
	// balance case) — no 500 on the idempotency-key UNIQUE collision.
	origClient := SquareClient
	SquareClient = &testCheckoutClient{
		SquareClient: origClient,
		hexIDs:       make(map[string]string),
	}
	defer func() { SquareClient = origClient }()

	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, _ := setupTestData(t, ctx, tx)
	adminToken := jwt.GenerateAdminToken()

	checkoutA := createTerminalCheckout(t, ctx, bookingID, adminToken, 5000)
	checkoutB := createTerminalCheckout(t, ctx, bookingID, adminToken, 5000)

	respA := pollCheckoutStatus(t, ctx, checkoutA, bookingID, adminToken)
	respB := pollCheckoutStatus(t, ctx, checkoutB, bookingID, adminToken)

	if respA.PaymentID == "" || respB.PaymentID == "" {
		t.Fatal("expected payment_ids for both checkouts")
	}
	if respA.PaymentID == respB.PaymentID {
		t.Error("expected two distinct payment rows for two distinct Square charges")
	}

	var rowCount int
	err := tx.QueryRow(ctx, "SELECT COUNT(*) FROM payments WHERE booking_id = $1", bookingID).Scan(&rowCount)
	if err != nil {
		t.Fatalf("failed to count payment rows: %v", err)
	}
	if rowCount != 2 {
		t.Errorf("expected exactly 2 payment rows for two equal-amount charges, got %d", rowCount)
	}
}

// mismatchedRefCheckoutClient forces GetCheckout to return a fixed COMPLETED
// payment whose reference_id points at a DIFFERENT booking, deterministically
// exercising GetCheckoutStatus's ownership check.
type mismatchedRefCheckoutClient struct {
	square.SquareClient
	result *square.PaymentResult
}

func (c *mismatchedRefCheckoutClient) GetCheckout(ctx context.Context, checkoutID string) (*square.PaymentResult, error) {
	return c.result, nil
}

func TestGetCheckoutStatus_EmptyReferenceID_Returns400(t *testing.T) {
	// A checkout with an EMPTY reference_id was created outside this app (no
	// booking was attached at creation time) — it must NOT be attachable to a
	// booking via polling. Fail closed with 400, exactly like a mismatched
	// reference, so a mis-scoped charge is never recorded.
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, _ := setupTestData(t, ctx, tx)

	origClient := SquareClient
	SquareClient = &mismatchedRefCheckoutClient{
		SquareClient: square.NewDevClient(),
		result: &square.PaymentResult{
			ID:          "pay_empty_ref",
			Status:      "COMPLETED",
			Amount:      5000,
			SquarePayID: "pay_empty_ref",
			ReferenceID: "", // created outside this app — no booking reference
			CreatedAt:   "2026-07-31T00:00:00Z",
			UpdatedAt:   "2026-07-31T00:00:00Z",
		},
	}
	defer func() { SquareClient = origClient }()

	checkoutID := "abcd1234ef56" // 12 hex chars, passes the checkout-id validation
	req := httptest.NewRequest("GET", "/api/admin/payments/"+checkoutID+"/status?booking_id="+bookingID, nil)
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("checkout_id", checkoutID)
	reqCtx := context.WithValue(req.Context(), chi.RouteCtxKey, rctx)
	reqCtx = context.WithValue(reqCtx, mw.UserIDKey, "000000000001")
	reqCtx = context.WithValue(reqCtx, mw.UserRoleKey, "admin")
	req = req.WithContext(reqCtx)

	w := httptest.NewRecorder()
	GetCheckoutStatus(w, req)
	if w.Code != http.StatusBadRequest {
		t.Fatalf("expected 400 for empty reference_id, got %d: %s", w.Code, w.Body.String())
	}

	// No payment may be recorded for the unreferenced checkout.
	var rowCount int
	if err := tx.QueryRow(ctx, "SELECT COUNT(*) FROM payments WHERE booking_id = $1", bookingID).Scan(&rowCount); err != nil {
		t.Fatalf("failed to count payment rows: %v", err)
	}
	if rowCount != 0 {
		t.Errorf("expected no payment rows after empty reference, got %d", rowCount)
	}
}

func TestGetCheckoutStatus_ReferenceIDMismatch_Returns400(t *testing.T) {
	// The terminal checkout's reference_id must match the booking being
	// polled; a checkout that references a different booking is refused with
	// 400 so its payment can never be recorded against the wrong booking.
	ctx, tx := testutils.SetupTestTx(t)
	_, bookingID, _ := setupTestData(t, ctx, tx)

	origClient := SquareClient
	SquareClient = &mismatchedRefCheckoutClient{
		SquareClient: square.NewDevClient(),
		result: &square.PaymentResult{
			ID:          "pay_mismatch",
			Status:      "COMPLETED",
			Amount:      5000,
			SquarePayID: "pay_mismatch",
			ReferenceID: "00000000dead", // a DIFFERENT booking
			CreatedAt:   "2026-07-31T00:00:00Z",
			UpdatedAt:   "2026-07-31T00:00:00Z",
		},
	}
	defer func() { SquareClient = origClient }()

	checkoutID := "abcd1234ef56" // 12 hex chars, passes the checkout-id validation
	req := httptest.NewRequest("GET", "/api/admin/payments/"+checkoutID+"/status?booking_id="+bookingID, nil)
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("checkout_id", checkoutID)
	reqCtx := context.WithValue(req.Context(), chi.RouteCtxKey, rctx)
	reqCtx = context.WithValue(reqCtx, mw.UserIDKey, "000000000001")
	reqCtx = context.WithValue(reqCtx, mw.UserRoleKey, "admin")
	req = req.WithContext(reqCtx)

	w := httptest.NewRecorder()
	GetCheckoutStatus(w, req)
	if w.Code != http.StatusBadRequest {
		t.Fatalf("expected 400 for reference_id mismatch, got %d: %s", w.Code, w.Body.String())
	}

	// No payment may be recorded for the mismatched checkout.
	var rowCount int
	if err := tx.QueryRow(ctx, "SELECT COUNT(*) FROM payments WHERE booking_id = $1", bookingID).Scan(&rowCount); err != nil {
		t.Fatalf("failed to count payment rows: %v", err)
	}
	if rowCount != 0 {
		t.Errorf("expected no payment rows after reference mismatch, got %d", rowCount)
	}
}