using System;
using System.Threading.Tasks;
using BTCPayServer.Payments;
using BTCPayServer.Tests.Logging;
using BTCPayServer.Views.Stores;
using NBitcoin;
using OpenQA.Selenium;
using Xunit;
using Xunit.Abstractions;

namespace BTCPayServer.Tests
{
    [Trait("Selenium", "Selenium")]
    [Collection(nameof(NonParallelizableCollectionDefinition))]
    public class CheckoutUITests : UnitTestBase
    {
        public const int TestTimeout = TestUtils.TestTimeout;
        public CheckoutUITests(ITestOutputHelper helper) : base(helper)
        {
        }

        [Fact(Timeout = TestTimeout)]
        public async Task CanHandleRefundEmailForm()
        {

            using var s = CreateSeleniumTester();
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser();
            s.CreateNewStore();
            s.AddDerivationScheme("BTC");
            s.GoToStore(StoreNavPages.CheckoutAppearance);
            s.Driver.FindElement(By.Id("RequiresRefundEmail")).Click();
            s.Driver.FindElement(By.Name("command")).Click();

            var emailAlreadyThereInvoiceId = s.CreateInvoice(100, "USD", "a@g.com");
            s.GoToInvoiceCheckout(emailAlreadyThereInvoiceId);
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
            s.GoToHome();
            s.CreateInvoice();
            s.Driver.FindElement(By.ClassName("invoice-details-link")).Click();
            s.Driver.AssertNoError();
            s.Driver.Navigate().Back();
            s.Driver.FindElement(By.ClassName("invoice-checkout-link")).Click();
            Assert.NotEmpty(s.Driver.FindElements(By.Id("checkoutCtrl")));

            Assert.True(s.Driver.FindElement(By.Id("emailAddressFormInput")).Displayed);
            s.Driver.FindElement(By.Id("emailAddressFormInput")).SendKeys("xxx");
            s.Driver.FindElement(By.Id("emailAddressForm")).FindElement(By.CssSelector("button.action-button"))
                .Click();
            var formInput = s.Driver.FindElement(By.Id("emailAddressFormInput"));

            Assert.True(formInput.Displayed);
            Assert.Contains("form-input-invalid", formInput.GetAttribute("class"));
            formInput = s.Driver.FindElement(By.Id("emailAddressFormInput"));
            formInput.SendKeys("@g.com");
            var actionButton = s.Driver.FindElement(By.Id("emailAddressForm")).FindElement(By.CssSelector("button.action-button"));
            actionButton.Click();
            try // Sometimes the click only take the focus, without actually really clicking on it...
            {
                actionButton.Click();
            }
            catch { }

            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
            s.Driver.Navigate().Refresh();
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
        }

        [Fact(Timeout = TestTimeout)]
        public async Task CanHandleRefundEmailForm2()
        {

            using var s = CreateSeleniumTester();
            // Prepare user account and store
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser();
            s.CreateNewStore();
            s.AddDerivationScheme("BTC");

            // Now create an invoice that requires a refund email
            var invoice = s.CreateInvoice(100, "USD", "", null, true);
            s.GoToInvoiceCheckout(invoice);

            var emailInput = s.Driver.FindElement(By.Id("emailAddressFormInput"));
            Assert.True(emailInput.Displayed);

            emailInput.SendKeys("a@g.com");

            var actionButton = s.Driver.FindElement(By.Id("emailAddressForm")).FindElement(By.CssSelector("button.action-button"));
            actionButton.Click();
            try // Sometimes the click only take the focus, without actually really clicking on it...
            {
                actionButton.Click();
            }
            catch { }

            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
            s.Driver.Navigate().Refresh();
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));

            s.GoToHome();

            // Now create an invoice that doesn't require a refund email
            s.CreateInvoice(100, "USD", "", null, false);
            s.Driver.FindElement(By.ClassName("invoice-details-link")).Click();
            s.Driver.AssertNoError();
            s.Driver.Navigate().Back();
            s.Driver.FindElement(By.ClassName("invoice-checkout-link")).Click();
            Assert.NotEmpty(s.Driver.FindElements(By.Id("checkoutCtrl")));
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
            s.Driver.Navigate().Refresh();
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));

            s.GoToHome();

            // Now create an invoice that requires refund email but already has one set, email input shouldn't show up
            s.CreateInvoice(100, "USD", "a@g.com", null, true);
            s.Driver.FindElement(By.ClassName("invoice-details-link")).Click();
            s.Driver.AssertNoError();
            s.Driver.Navigate().Back();
            s.Driver.FindElement(By.ClassName("invoice-checkout-link")).Click();
            Assert.NotEmpty(s.Driver.FindElements(By.Id("checkoutCtrl")));
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
            s.Driver.Navigate().Refresh();
            s.Driver.AssertElementNotFound(By.Id("emailAddressFormInput"));
        }

        [Fact(Timeout = TestTimeout)]
        public async Task CanUseLanguageDropdown()
        {
            using var s = CreateSeleniumTester();
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser();
            s.CreateNewStore();
            s.AddDerivationScheme("BTC");

            var invoiceId = s.CreateInvoice();
            s.GoToInvoiceCheckout(invoiceId);
            Assert.True(s.Driver.FindElement(By.Id("DefaultLang")).FindElements(By.TagName("option")).Count > 1);
            var payWithTextEnglish = s.Driver.FindElement(By.Id("pay-with-text")).Text;

            var prettyDropdown = s.Driver.FindElement(By.Id("prettydropdown-DefaultLang"));
            prettyDropdown.Click();
            await Task.Delay(200);
            prettyDropdown.FindElement(By.CssSelector("[data-value=\"da-DK\"]")).Click();
            await Task.Delay(1000);
            Assert.NotEqual(payWithTextEnglish, s.Driver.FindElement(By.Id("pay-with-text")).Text);
            s.Driver.Navigate().GoToUrl(s.Driver.Url + "?lang=da-DK");

            Assert.NotEqual(payWithTextEnglish, s.Driver.FindElement(By.Id("pay-with-text")).Text);

            s.Driver.Quit();
        }

        [Fact(Timeout = TestTimeout)]
        [Trait("Lightning", "Lightning")]
        public async Task CanSetDefaultPaymentMethod()
        {
            using var s = CreateSeleniumTester();
            s.Server.ActivateLightning();
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser(true);
            s.CreateNewStore();
            s.AddLightningNode();
            s.AddDerivationScheme("BTC");

            var invoiceId = s.CreateInvoice(defaultPaymentMethod: "BTC_LightningLike");
            s.GoToInvoiceCheckout(invoiceId);

            Assert.Equal("Bitcoin (Lightning) (BTC)", s.Driver.FindElement(By.ClassName("payment__currencies")).Text);
            s.Driver.Quit();
        }

        [Fact(Timeout = TestTimeout)]
        [Trait("Lightning", "Lightning")]
        public async Task CanUseLightningSatsFeature()
        {
            using var s = CreateSeleniumTester();
            s.Server.ActivateLightning();
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser(true);
            s.CreateNewStore();
            s.AddLightningNode();
            s.GoToStore();
            s.Driver.FindElement(By.Id("Modify-LightningBTC")).Click();
            s.Driver.SetCheckbox(By.Id("LightningAmountInSatoshi"), true);
            s.Driver.FindElement(By.Id("save")).Click();
            Assert.Contains("BTC Lightning settings successfully updated", s.FindAlertMessage().Text);

            var invoiceId = s.CreateInvoice(10, "USD", "a@g.com");
            s.GoToInvoiceCheckout(invoiceId);
            Assert.Contains("Sats", s.Driver.FindElement(By.ClassName("payment__currencies_noborder")).Text);
        }

        [Fact(Timeout = TestTimeout)]
        public async Task CanUseJSModal()
        {
            using var s = CreateSeleniumTester();
            await s.StartAsync();
            s.GoToRegister();
            s.RegisterNewUser();
            s.CreateNewStore();
            s.GoToStore();
            s.AddDerivationScheme();
            var invoiceId = s.CreateInvoice(0.001m, "BTC", "a@x.com");
            var invoice = await s.Server.PayTester.InvoiceRepository.GetInvoice(invoiceId);
            s.Driver.Navigate()
                .GoToUrl(new Uri(s.ServerUri, $"tests/index.html?invoice={invoiceId}"));
            TestUtils.Eventually(() =>
            {
                Assert.True(s.Driver.FindElement(By.Name("btcpay")).Displayed);
            });
            await s.Server.ExplorerNode.SendToAddressAsync(BitcoinAddress.Create(invoice
                    .GetPaymentMethod(new PaymentMethodId("BTC", PaymentTypes.BTCLike))
                    .GetPaymentMethodDetails().GetPaymentDestination(), Network.RegTest),
                new Money(0.001m, MoneyUnit.BTC));

            IWebElement closebutton = null;
            TestUtils.Eventually(() =>
            {
                var frameElement = s.Driver.FindElement(By.Name("btcpay"));
                var iframe = s.Driver.SwitchTo().Frame(frameElement);
                closebutton = iframe.FindElement(By.ClassName("close-action"));
                Assert.True(closebutton.Displayed);
            });
            closebutton.Click();
            s.Driver.AssertElementNotFound(By.Name("btcpay"));
            Assert.Equal(s.Driver.Url,
                new Uri(s.ServerUri, $"tests/index.html?invoice={invoiceId}").ToString());
        }
    }
}