// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Aspire.Cli.Tests.Utils;
using Aspire.Deployment.EndToEnd.Tests.Helpers;
using Hex1b.Automation;
using Xunit;
 
namespace Aspire.Deployment.EndToEnd.Tests;
 
/// <summary>
/// End-to-end tests for deploying TypeScript Express/React Aspire applications to Azure Container Apps.
/// </summary>
public sealed class TypeScriptExpressDeploymentTests(ITestOutputHelper output)
{
    // Timeout set to 40 minutes to allow for Azure provisioning and npm install.
    private static readonly TimeSpan s_testTimeout = TimeSpan.FromMinutes(40);
 
    [Fact]
    public async Task DeployTypeScriptExpressTemplateToAzureContainerApps()
    {
        using var cts = new CancellationTokenSource(s_testTimeout);
        using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(
            cts.Token, TestContext.Current.CancellationToken);
        var cancellationToken = linkedCts.Token;
 
        await DeployTypeScriptExpressTemplateToAzureContainerAppsCore(cancellationToken);
    }
 
    private async Task DeployTypeScriptExpressTemplateToAzureContainerAppsCore(CancellationToken cancellationToken)
    {
        // Validate prerequisites
        var subscriptionId = AzureAuthenticationHelpers.TryGetSubscriptionId();
        if (string.IsNullOrEmpty(subscriptionId))
        {
            Assert.Skip("Azure subscription not configured. Set ASPIRE_DEPLOYMENT_TEST_SUBSCRIPTION.");
        }
 
        if (!AzureAuthenticationHelpers.IsAzureAuthAvailable())
        {
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                Assert.Fail("Azure authentication not available in CI. Check OIDC configuration.");
            }
            else
            {
                Assert.Skip("Azure authentication not available. Run 'az login' to authenticate.");
            }
        }
 
        var workspace = TemporaryWorkspace.Create(output);
        var startTime = DateTime.UtcNow;
        var deploymentUrls = new Dictionary<string, string>();
        var resourceGroupName = DeploymentE2ETestHelpers.GenerateResourceGroupName("ts-express");
        var projectName = "TsExpressApp";
 
        output.WriteLine($"Test: {nameof(DeployTypeScriptExpressTemplateToAzureContainerApps)}");
        output.WriteLine($"Project Name: {projectName}");
        output.WriteLine($"Resource Group: {resourceGroupName}");
        output.WriteLine($"Subscription: {subscriptionId[..8]}...");
        output.WriteLine($"Workspace: {workspace.WorkspaceRoot.FullName}");
 
        try
        {
            using var terminal = DeploymentE2ETestHelpers.CreateTestTerminal();
            var pendingRun = terminal.RunAsync(cancellationToken);
 
            var counter = new SequenceCounter();
            var auto = new Hex1bTerminalAutomator(terminal, defaultTimeout: TimeSpan.FromSeconds(500));
 
            // Step 1: Prepare environment
            output.WriteLine("Step 1: Preparing environment...");
            await auto.PrepareEnvironmentAsync(workspace, counter);
 
            // Step 2: Set up CLI environment (in CI)
            // TypeScript apphosts need the full bundle (not just the CLI binary) because
            // the prebuilt AppHost server is required for aspire add to regenerate SDK code.
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                var prNumber = DeploymentE2ETestHelpers.GetPrNumber();
                if (prNumber > 0)
                {
                    output.WriteLine($"Step 2: Installing Aspire bundle from PR #{prNumber}...");
                    await auto.InstallAspireBundleFromPullRequestAsync(prNumber, counter);
                }
                await auto.SourceAspireBundleEnvironmentAsync(counter);
            }
 
            // Step 3: Create TypeScript Express/React project using aspire new
            output.WriteLine("Step 3: Creating TypeScript Express/React project...");
            await auto.AspireNewAsync(projectName, counter, template: AspireTemplate.ExpressReact);
 
            // Step 4: Navigate to project directory
            output.WriteLine("Step 4: Navigating to project directory...");
            await auto.TypeAsync($"cd {projectName}");
            await auto.EnterAsync();
            await auto.WaitForSuccessPromptAsync(counter);
 
            // Step 5: Add Aspire.Hosting.Azure.AppContainers package
            output.WriteLine("Step 5: Adding Azure Container Apps hosting package...");
            await auto.TypeAsync("aspire add Aspire.Hosting.Azure.AppContainers");
            await auto.EnterAsync();
 
            // In CI, aspire add shows a version selection prompt
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                await auto.WaitUntilTextAsync("(based on NuGet.config)", timeout: TimeSpan.FromSeconds(60));
                await auto.EnterAsync(); // select first version (PR build)
            }
 
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromSeconds(180));
 
            // Step 6: Modify apphost.ts to add Azure Container App Environment for deployment
            {
                var projectDir = Path.Combine(workspace.WorkspaceRoot.FullName, projectName);
                var appHostFilePath = Path.Combine(projectDir, "apphost.ts");
 
                output.WriteLine($"Looking for apphost.ts at: {appHostFilePath}");
 
                var content = File.ReadAllText(appHostFilePath);
 
                // Add Azure Container App Environment before build().run()
                // The template already has publishWithContainerFiles for bundling the frontend
                content = content.Replace(
                    "await builder.build().run();",
                    """
// Add Azure Container App Environment for deployment
await builder.addAzureContainerAppEnvironment("infra");
 
await builder.build().run();
""");
 
                File.WriteAllText(appHostFilePath, content);
 
                output.WriteLine($"Modified apphost.ts at: {appHostFilePath}");
            }
 
            // Step 7: Set environment for deployment
            await auto.TypeAsync($"unset ASPIRE_PLAYGROUND && export AZURE__LOCATION=westus3 && export AZURE__RESOURCEGROUP={resourceGroupName}");
            await auto.EnterAsync();
            await auto.WaitForSuccessPromptAsync(counter);
 
            // Step 8: Deploy to Azure Container Apps using aspire deploy
            output.WriteLine("Step 8: Starting Azure Container Apps deployment...");
            await auto.TypeAsync("aspire deploy --clear-cache");
            await auto.EnterAsync();
            await auto.WaitUntilTextAsync("PIPELINE SUCCEEDED", timeout: TimeSpan.FromMinutes(30));
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromMinutes(2));
 
            // Step 9: Extract deployment URLs and verify endpoints with retry
            output.WriteLine("Step 9: Verifying deployed endpoints...");
            await auto.TypeAsync($"RG_NAME=\"{resourceGroupName}\" && " +
                      "echo \"Resource group: $RG_NAME\" && " +
                      "if ! az group show -n \"$RG_NAME\" &>/dev/null; then echo \"❌ Resource group not found\"; exit 1; fi && " +
                      "urls=$(az containerapp list -g \"$RG_NAME\" --query \"[].properties.configuration.ingress.fqdn\" -o tsv 2>/dev/null | grep -v '\\.internal\\.') && " +
                      "if [ -z \"$urls\" ]; then echo \"❌ No external container app endpoints found\"; exit 1; fi && " +
                      "failed=0 && " +
                      "for url in $urls; do " +
                      "echo \"Checking https://$url...\"; " +
                      "success=0; " +
                      "for i in $(seq 1 18); do " +
                      "STATUS=$(curl -s -o /dev/null -w \"%{http_code}\" \"https://$url\" --max-time 10 2>/dev/null); " +
                      "if [ \"$STATUS\" = \"200\" ] || [ \"$STATUS\" = \"302\" ]; then echo \"  ✅ $STATUS (attempt $i)\"; success=1; break; fi; " +
                      "echo \"  Attempt $i: $STATUS, retrying in 10s...\"; sleep 10; " +
                      "done; " +
                      "if [ \"$success\" -eq 0 ]; then echo \"  ❌ Failed after 18 attempts\"; failed=1; fi; " +
                      "done && " +
                      "if [ \"$failed\" -ne 0 ]; then echo \"❌ One or more endpoint checks failed\"; exit 1; fi");
            await auto.EnterAsync();
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromMinutes(5));
 
            // Step 10: Exit terminal
            await auto.TypeAsync("exit");
            await auto.EnterAsync();
 
            await pendingRun;
 
            var duration = DateTime.UtcNow - startTime;
            output.WriteLine($"Deployment completed in {duration}");
 
            DeploymentReporter.ReportDeploymentSuccess(
                nameof(DeployTypeScriptExpressTemplateToAzureContainerApps),
                resourceGroupName,
                deploymentUrls,
                duration);
 
            output.WriteLine("✅ Test passed!");
        }
        catch (Exception ex)
        {
            var duration = DateTime.UtcNow - startTime;
            output.WriteLine($"❌ Test failed after {duration}: {ex.Message}");
 
            DeploymentReporter.ReportDeploymentFailure(
                nameof(DeployTypeScriptExpressTemplateToAzureContainerApps),
                resourceGroupName,
                ex.Message,
                ex.StackTrace);
 
            throw;
        }
        finally
        {
            output.WriteLine($"Triggering cleanup of resource group: {resourceGroupName}");
            TriggerCleanupResourceGroup(resourceGroupName, output);
            DeploymentReporter.ReportCleanupStatus(resourceGroupName, success: true, "Cleanup triggered (fire-and-forget)");
        }
    }
 
    private static void TriggerCleanupResourceGroup(string resourceGroupName, ITestOutputHelper output)
    {
        var process = new System.Diagnostics.Process
        {
            StartInfo = new System.Diagnostics.ProcessStartInfo
            {
                FileName = "az",
                Arguments = $"group delete --name {resourceGroupName} --yes --no-wait",
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                UseShellExecute = false,
                CreateNoWindow = true
            }
        };
 
        try
        {
            process.Start();
            output.WriteLine($"Cleanup triggered for resource group: {resourceGroupName}");
        }
        catch (Exception ex)
        {
            output.WriteLine($"Failed to trigger cleanup: {ex.Message}");
        }
    }
}