package hyperswitch

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

func TestClient_CreatePayment(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost || r.URL.Path != "/payments" {
			t.Errorf("unexpected request: %s %s", r.Method, r.URL.Path)
		}
		if r.Header.Get("api-key") == "" {
			t.Error("missing api-key header")
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(map[string]string{
			"payment_id":    "pay_test_123",
			"client_secret": "pi_test_secret_xxx",
			"status":        "requires_payment_method",
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "test_api_key")
	paymentID, clientSecret, err := client.CreatePaymentSimple(
		context.Background(),
		6540,
		"EUR",
		"order-123",
		"https://example.com/success",
		map[string]string{"key": "value"},
	)
	if err != nil {
		t.Fatalf("CreatePaymentSimple: %v", err)
	}
	if paymentID != "pay_test_123" {
		t.Errorf("payment_id = %q, want pay_test_123", paymentID)
	}
	if clientSecret != "pi_test_secret_xxx" {
		t.Errorf("client_secret = %q, want pi_test_secret_xxx", clientSecret)
	}
}

func TestClient_CreatePayment_HTTPError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusBadRequest)
	}))
	defer server.Close()

	client := NewClient(server.URL, "test_api_key")
	_, _, err := client.CreatePaymentSimple(context.Background(), 100, "EUR", "", "", nil)
	if err == nil {
		t.Fatal("expected error for 400 response")
	}
}

func TestClient_GetPaymentStatus(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/payments/pay_123" {
			t.Errorf("unexpected path: %s", r.URL.Path)
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(map[string]string{
			"payment_id": "pay_123",
			"status":     "succeeded",
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "test_api_key")
	status, err := client.GetPaymentStatus(context.Background(), "pay_123")
	if err != nil {
		t.Fatalf("GetPaymentStatus: %v", err)
	}
	if status != "succeeded" {
		t.Errorf("status = %q, want succeeded", status)
	}
}