//go:build test

package square

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestPaymentFromSquare_ElseBranch_SurfacesBrandWithoutCardID(t *testing.T) {
	p := &sqPayment{
		ID:     "pay_1",
		Status: "COMPLETED",
		TotalMoney: sqMoney{Amount: 5000, Currency: "GBP"},
		CardDetails: &sqCardDetails{
			Card: sqCard{
				ID:        "",
				CardBrand: "VISA",
				Last4:     "4242",
			},
		},
	}

	result := paymentFromSquare(p)
	if result.CardBrand != "VISA" {
		t.Errorf("expected CardBrand VISA, got %s", result.CardBrand)
	}
	if result.CardLast4 != "4242" {
		t.Errorf("expected CardLast4 4242, got %s", result.CardLast4)
	}
}

func TestPaymentFromSquare_NilCardDetails(t *testing.T) {
	p := &sqPayment{
		ID:          "pay_2",
		Status:      "COMPLETED",
		TotalMoney:  sqMoney{Amount: 2500, Currency: "GBP"},
		CardDetails: nil,
	}

	result := paymentFromSquare(p)
	if result.CardBrand != "" {
		t.Errorf("expected empty CardBrand when no card details, got %s", result.CardBrand)
	}
	if result.Amount != 2500 {
		t.Errorf("expected amount 2500, got %d", result.Amount)
	}
}

// TestCreateCheckoutHTTP_DeviceOptionsWireShape verifies the terminal checkout
// request puts device_id inside checkout.device_options (Square's required
// shape), not at the top level. A top-level device_id is rejected with 400 by
// Square's real API.
func TestCreateCheckoutHTTP_DeviceOptionsWireShape(t *testing.T) {
	var captured map[string]any
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			t.Errorf("expected POST, got %s", r.Method)
		}
		if r.URL.Path != "/v2/terminals/checkouts" {
			t.Errorf("expected /v2/terminals/checkouts, got %s", r.URL.Path)
		}
		if err := json.NewDecoder(r.Body).Decode(&captured); err != nil {
			t.Errorf("failed to decode request body: %v", err)
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"checkout":{"id":"chk_test","status":"PENDING","amount_money":{"amount":5000,"currency":"GBP"},"created_at":"2026-07-31T00:00:00Z","updated_at":"2026-07-31T00:00:00Z"}}`))
	}))
	defer srv.Close()

	hc := &httpClient{baseURL: srv.URL, token: "test-token", http: srv.Client()}

	_, err := createCheckoutHTTPWithClient(context.Background(), CreateCheckoutReq{
		Amount:         5000,
		Currency:       "GBP",
		IdempotencyKey: "ik-1",
		DeviceID:       "dvc_test",
	}, hc)
	if err != nil {
		t.Fatalf("createCheckoutHTTP failed: %v", err)
	}

	checkout, ok := captured["checkout"].(map[string]any)
	if !ok {
		t.Fatalf("expected checkout object in body, got %v", captured)
	}
	// device_id must NOT be at the top level
	if _, hasTopLevel := captured["device_id"]; hasTopLevel {
		t.Errorf("device_id must not be top-level in terminal checkout request: %v", captured)
	}
	// device_id must live under checkout.device_options
	devOpts, ok := checkout["device_options"].(map[string]any)
	if !ok {
		t.Fatalf("expected checkout.device_options in body, got %v", checkout)
	}
	if devOpts["device_id"] != "dvc_test" {
		t.Errorf("expected checkout.device_options.device_id = dvc_test, got %v", devOpts)
	}
}