//go:build test && dev

package payments

import (
	"net/http"
	"testing"

	"crussell/internal/square"
	"crussell/testutils"
	"crussell/testutils/jwt"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// =============================================================================
// M5: Fully-paid bookings auto-complete
// =============================================================================

// TestBookingPayment_FullyPaid_CompletesBooking verifies that an online
// payment covering 100% of the booking total transitions an active booking to
// 'completed' so it leaves the admin's Current Appointment view.
func TestBookingPayment_FullyPaid_CompletesBooking(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	// setupTestData creates a £50 (5000 pence) booking with status in_progress.
	userID, bookingID, _ := setupTestData(t, ctx, tx)
	userToken := jwt.GenerateUserToken(userID)

	cardToken := "cnon:fully-paid-complete"
	req := CreateBookingPaymentRequest{
		Amount:         5000,
		PaymentType:    "full",
		NewCardToken:   &cardToken,
		IdempotencyKey: "fully-paid-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var status string
	err := tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "completed", status, "a fully-paid booking must auto-complete")
}

// TestBookingPayment_PartialPayment_DoesNotComplete verifies that a partial
// payment (below 100%) leaves the booking in its active status.
func TestBookingPayment_PartialPayment_DoesNotComplete(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, bookingID, _ := setupTestData(t, ctx, tx)
	userToken := jwt.GenerateUserToken(userID)

	// £25 = 50% of the £50 booking total.
	cardToken := "cnon:partial-no-complete"
	req := CreateBookingPaymentRequest{
		Amount:         2500,
		PaymentType:    "partial",
		NewCardToken:   &cardToken,
		IdempotencyKey: "partial-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var status string
	err := tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "in_progress", status, "a partial payment must not complete the booking")
}

// TestBookingPayment_FullPaymentPlusTip_Completes verifies that a full payment
// plus a later tip both succeed — the booking completes on the full payment
// and the tip is still accepted on the completed booking.
func TestBookingPayment_FullPaymentPlusTip_Completes(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	// setupTestDataPast: booking started 1 hour ago, status in_progress.
	userID, bookingID, _ := setupTestDataPast(t, ctx, tx)
	userToken := jwt.GenerateUserToken(userID)

	cardToken := "cnon:full-plus-tip"
	req := CreateBookingPaymentRequest{
		Amount:         5000,
		PaymentType:    "full",
		NewCardToken:   &cardToken,
		IdempotencyKey: "full-plus-tip-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var status string
	err := tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "completed", status)

	// The tip is gratuity for a service already rendered — still accepted on a
	// completed booking (bookingStatusAllowsCompletedPayment includes it).
	tipToken := "cnon:tip-on-completed"
	tipReq := CreateTipPaymentRequest{
		Amount:       500,
		NewCardToken: &tipToken,
	}
	handler = CreateTipPayment
	w = makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/tip", tipReq, userToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var tipCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM payments WHERE booking_id = $1 AND payment_type = 'tip'`, bookingID).Scan(&tipCount)
	require.NoError(t, err)
	assert.Equal(t, 1, tipCount, "the tip must be recorded on the completed booking")

	err = tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "completed", status, "a tip must not revert the completed status")
}

// TestTerminalPayment_FullyPaid_CompletesBooking verifies that a Square
// Terminal (card-machine) charge covering 100% of the booking total also
// auto-completes the booking.
func TestTerminalPayment_FullyPaid_CompletesBooking(t *testing.T) {
	origClient := SquareClient
	SquareClient = &testCheckoutClient{
		SquareClient: square.NewDevClient(),
		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",
		TipEnabled:  false,
	}
	w := makePaymentRequest(handler, "POST", "/api/admin/bookings/"+bookingID+"/payment", req, adminToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var createResp CheckoutResponse
	if err := parsePaymentResponseBody(w, &createResp); err != nil {
		t.Fatalf("failed to parse create response: %v", err)
	}
	require.NotEmpty(t, createResp.CheckoutID)

	resp := pollCheckoutStatus(t, ctx, createResp.CheckoutID, bookingID, adminToken)
	require.Equal(t, "COMPLETED", resp.Status)
	require.NotEmpty(t, resp.PaymentID)

	var status string
	err := tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "completed", status, "a fully-paid terminal charge must auto-complete the booking")
}

// TestFullyPaid_CancelledBooking_StaysCancelled verifies that a cancelled
// booking can never be auto-completed by a payment: the payment is rejected
// and the status is unchanged.
func TestFullyPaid_CancelledBooking_StaysCancelled(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, bookingID, _ := setupTestData(t, ctx, tx)
	_, err := tx.Exec(ctx, `UPDATE bookings SET status = 'client_cancelled' WHERE id = $1`, bookingID)
	require.NoError(t, err)

	userToken := jwt.GenerateUserToken(userID)
	cardToken := "cnon:cancelled-booking"
	req := CreateBookingPaymentRequest{
		Amount:         5000,
		PaymentType:    "full",
		NewCardToken:   &cardToken,
		IdempotencyKey: "cancelled-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)
	require.Equal(t, http.StatusConflict, w.Code, "body: %s", w.Body.String())

	var status string
	err = tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	assert.Equal(t, "client_cancelled", status, "a cancelled booking must never be completed by a payment")

	var payCount int
	err = tx.QueryRow(ctx, `SELECT COUNT(*) FROM payments WHERE booking_id = $1`, bookingID).Scan(&payCount)
	require.NoError(t, err)
	assert.Equal(t, 0, payCount, "no payment may be recorded on a cancelled booking")
}

// TestBookingPayment_FullyPaid_AwardsLoyaltyStamp verifies that the loyalty
// stamp is awarded by the payment-driven completion, mirroring the admin
// progress endpoint.
func TestBookingPayment_FullyPaid_AwardsLoyaltyStamp(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, bookingID, _ := setupTestData(t, ctx, tx)
	userToken := jwt.GenerateUserToken(userID)

	cardToken := "cnon:loyalty-stamp"
	req := CreateBookingPaymentRequest{
		Amount:         5000,
		PaymentType:    "full",
		NewCardToken:   &cardToken,
		IdempotencyKey: "loyalty-stamp-" + bookingID,
	}

	handler := CreateBookingPayment
	w := makePaymentRequest(handler, "POST", "/api/bookings/"+bookingID+"/payment", req, userToken, ctx)
	require.Equal(t, http.StatusOK, w.Code, "body: %s", w.Body.String())

	var status string
	err := tx.QueryRow(ctx, `SELECT status FROM bookings WHERE id = $1`, bookingID).Scan(&status)
	require.NoError(t, err)
	require.Equal(t, "completed", status)

	var stamps int
	err = tx.QueryRow(ctx, `SELECT loyalty_stamps FROM users WHERE id = $1`, userID).Scan(&stamps)
	require.NoError(t, err)
	assert.Equal(t, 1, stamps, "a payment-completed booking must award one loyalty stamp")
}