// 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>
/// L1 infrastructure verification test for Azure Storage Blob with VNet and Private Endpoint.
/// Deploys VNet + subnets + ACA delegation + Storage with PE, then verifies infrastructure via az CLI.
/// </summary>
public sealed class VnetStorageBlobInfraDeploymentTests(ITestOutputHelper output)
{
    private static readonly TimeSpan s_testTimeout = TimeSpan.FromMinutes(40);
 
    [Fact]
    public async Task DeployVnetStorageBlobInfrastructure()
    {
        using var cts = new CancellationTokenSource(s_testTimeout);
        using var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(
            cts.Token, TestContext.Current.CancellationToken);
        var cancellationToken = linkedCts.Token;
 
        await DeployVnetStorageBlobInfrastructureCore(cancellationToken);
    }
 
    private async Task DeployVnetStorageBlobInfrastructureCore(CancellationToken cancellationToken)
    {
        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 resourceGroupName = DeploymentE2ETestHelpers.GenerateResourceGroupName("vnet-blob-l1");
 
        output.WriteLine($"Test: {nameof(DeployVnetStorageBlobInfrastructure)}");
        output.WriteLine($"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)
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                output.WriteLine("Step 2: Using pre-installed Aspire CLI from local build...");
                await auto.SourceAspireCliEnvironmentAsync(counter);
            }
 
            // Step 3: Create single-file AppHost using aspire init
            output.WriteLine("Step 3: Creating single-file AppHost with aspire init...");
            await auto.AspireInitAsync(counter);
 
            // Step 4a: Add Aspire.Hosting.Azure.AppContainers
            output.WriteLine("Step 4a: Adding Azure Container Apps hosting package...");
            await auto.TypeAsync("aspire add Aspire.Hosting.Azure.AppContainers");
            await auto.EnterAsync();
 
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                await auto.WaitUntilTextAsync("(based on NuGet.config)", timeout: TimeSpan.FromSeconds(60));
                await auto.EnterAsync();
            }
 
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromSeconds(180));
 
            // Step 4b: Add Aspire.Hosting.Azure.Network
            output.WriteLine("Step 4b: Adding Azure Network hosting package...");
            await auto.TypeAsync("aspire add Aspire.Hosting.Azure.Network");
            await auto.EnterAsync();
 
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                await auto.WaitUntilTextAsync("(based on NuGet.config)", timeout: TimeSpan.FromSeconds(60));
                await auto.EnterAsync();
            }
 
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromSeconds(180));
 
            // Step 4c: Add Aspire.Hosting.Azure.Storage
            output.WriteLine("Step 4c: Adding Azure Storage hosting package...");
            await auto.TypeAsync("aspire add Aspire.Hosting.Azure.Storage");
            await auto.EnterAsync();
 
            if (DeploymentE2ETestHelpers.IsRunningInCI)
            {
                await auto.WaitUntilTextAsync("(based on NuGet.config)", timeout: TimeSpan.FromSeconds(60));
                await auto.EnterAsync();
            }
 
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromSeconds(180));
 
            // Step 5: Modify apphost.cs to add VNet + PE infrastructure
            {
                var appHostFilePath = Path.Combine(workspace.WorkspaceRoot.FullName, "apphost.cs");
                output.WriteLine($"Looking for apphost.cs at: {appHostFilePath}");
 
                var content = File.ReadAllText(appHostFilePath);
 
                var buildRunPattern = "builder.Build().Run();";
                var replacement = """
#pragma warning disable ASPIREAZURE003
 
// VNet with delegated subnet for ACA and PE subnet for storage
var vnet = builder.AddAzureVirtualNetwork("vnet");
var acaSubnet = vnet.AddSubnet("aca-subnet", "10.0.0.0/23");
var peSubnet = vnet.AddSubnet("pe-subnet", "10.0.2.0/24");
 
_ = builder.AddAzureContainerAppEnvironment("env")
    .WithDelegatedSubnet(acaSubnet);
 
// Storage with Private Endpoint
var storage = builder.AddAzureStorage("storage");
var blobs = storage.AddBlobs("blobs");
peSubnet.AddPrivateEndpoint(blobs);
 
#pragma warning restore ASPIREAZURE003
 
builder.Build().Run();
""";
 
                content = content.Replace(buildRunPattern, replacement);
                File.WriteAllText(appHostFilePath, content);
 
                output.WriteLine($"Modified apphost.cs with VNet + Storage PE infrastructure");
                output.WriteLine($"New content:\n{content}");
            }
 
            // Step 6: Set environment variables for deployment
            await auto.TypeAsync($"unset ASPIRE_PLAYGROUND && export AZURE__LOCATION=westus3 && export AZURE__RESOURCEGROUP={resourceGroupName}");
            await auto.EnterAsync();
            await auto.WaitForSuccessPromptAsync(counter);
 
            // Step 7: Deploy to Azure
            output.WriteLine("Step 7: Starting Azure deployment...");
            await auto.TypeAsync("aspire deploy --clear-cache");
            await auto.EnterAsync();
            await auto.WaitUntilTextAsync("PIPELINE SUCCEEDED", timeout: TimeSpan.FromMinutes(25));
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromMinutes(2));
 
            // Step 8: Verify VNet infrastructure
            output.WriteLine("Step 8: Verifying VNet infrastructure...");
            await auto.TypeAsync($"az network vnet list -g \"{resourceGroupName}\" --query \"[].name\" -o tsv | head -5 && " +
                      $"echo \"---PE---\" && az network private-endpoint list -g \"{resourceGroupName}\" --query \"[].{{name:name,state:provisioningState}}\" -o table && " +
                      $"echo \"---DNS---\" && az network private-dns zone list -g \"{resourceGroupName}\" --query \"[].name\" -o tsv");
            await auto.EnterAsync();
            await auto.WaitForSuccessPromptAsync(counter, TimeSpan.FromSeconds(60));
 
            // Step 9: 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(DeployVnetStorageBlobInfrastructure),
                resourceGroupName,
                new Dictionary<string, string>(),
                duration);
        }
        catch (Exception ex)
        {
            output.WriteLine($"Test failed: {ex.Message}");
 
            DeploymentReporter.ReportDeploymentFailure(
                nameof(DeployVnetStorageBlobInfrastructure),
                resourceGroupName,
                ex.Message);
 
            throw;
        }
        finally
        {
            output.WriteLine($"Cleaning up resource group: {resourceGroupName}");
            await CleanupResourceGroupAsync(resourceGroupName);
        }
    }
 
    private async Task CleanupResourceGroupAsync(string resourceGroupName)
    {
        try
        {
            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
                }
            };
 
            process.Start();
            await process.WaitForExitAsync();
 
            if (process.ExitCode == 0)
            {
                output.WriteLine($"Resource group deletion initiated: {resourceGroupName}");
            }
            else
            {
                var error = await process.StandardError.ReadToEndAsync();
                output.WriteLine($"Resource group deletion may have failed (exit code {process.ExitCode}): {error}");
            }
        }
        catch (Exception ex)
        {
            output.WriteLine($"Failed to cleanup resource group: {ex.Message}");
        }
    }
}