package payment

import "testing"

func TestParsePlatform(t *testing.T) {
	testCases := []struct {
		name     string
		input    string
		expected Platform
	}{
		{name: "exact AppleIAP", input: "AppleIAP", expected: AppleIAP},
		{name: "snake apple_iap", input: "apple_iap", expected: AppleIAP},
		{name: "kebab apple-iap", input: "apple-iap", expected: AppleIAP},
		{name: "compact appleiap", input: "appleiap", expected: AppleIAP},
		{name: "trimmed value", input: "  apple_iap  ", expected: AppleIAP},
		{name: "legacy exact CryptoSaaS", input: "CryptoSaaS", expected: CryptoSaaS},
		{name: "snake crypto_saas", input: "crypto_saas", expected: CryptoSaaS},
		{name: "unsupported", input: "unknown_gateway", expected: UNSUPPORTED},
	}

	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			got := ParsePlatform(testCase.input)
			if got != testCase.expected {
				t.Fatalf("ParsePlatform(%q) = %v, expected %v", testCase.input, got, testCase.expected)
			}
		})
	}
}

func TestPlatformStringIsCanonical(t *testing.T) {
	testCases := []struct {
		name     string
		input    Platform
		expected string
	}{
		{name: "stripe", input: Stripe, expected: "Stripe"},
		{name: "alipay", input: AlipayF2F, expected: "AlipayF2F"},
		{name: "epay", input: EPay, expected: "EPay"},
		{name: "balance", input: Balance, expected: "balance"},
		{name: "crypto", input: CryptoSaaS, expected: "CryptoSaaS"},
		{name: "apple", input: AppleIAP, expected: "AppleIAP"},
		{name: "unsupported", input: UNSUPPORTED, expected: "unsupported"},
	}

	for _, testCase := range testCases {
		t.Run(testCase.name, func(t *testing.T) {
			got := testCase.input.String()
			if got != testCase.expected {
				t.Fatalf("Platform.String() = %q, expected %q", got, testCase.expected)
			}
		})
	}
}

func TestCanonicalPlatformName(t *testing.T) {
	canonical, ok := CanonicalPlatformName("apple_iap")
	if !ok {
		t.Fatalf("expected apple_iap to be supported")
	}
	if canonical != "AppleIAP" {
		t.Fatalf("canonical name mismatch: got %q", canonical)
	}

	_, ok = CanonicalPlatformName("not_exists")
	if ok {
		t.Fatalf("expected unsupported platform to return ok=false")
	}
}