// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Aspire.Azure.Common;
using Aspire.Azure.Storage.Queues;
using Azure.Core;
using Azure.Core.Extensions;
using Azure.Storage.Queues;
using HealthChecks.Azure.Storage.Queues;
using Microsoft.Extensions.Azure;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Diagnostics.HealthChecks;
 
namespace Microsoft.Extensions.Hosting;
 
/// <summary>
/// Provides extension methods for registering <see cref="QueueServiceClient"/> as a singleton in the services provided by the <see cref="IHostApplicationBuilder"/>.
/// Enables retries, corresponding health check, logging and telemetry.
/// </summary>
public static class AspireQueueStorageExtensions
{
    private const string DefaultConfigSectionName = "Aspire:Azure:Storage:Queues";
 
    /// <summary>
    /// Registers <see cref="QueueServiceClient"/> as a singleton in the services provided by the <paramref name="builder"/>.
    /// Enables retries, corresponding health check, logging and telemetry.
    /// </summary>
    /// <param name="builder">The <see cref="IHostApplicationBuilder" /> to read config from and add services to.</param>
    /// <param name="connectionName">A name used to retrieve the connection string from the ConnectionStrings configuration section.</param>
    /// <param name="configureSettings">An optional method that can be used for customizing the <see cref="AzureStorageQueuesSettings"/>. It's invoked after the settings are read from the configuration.</param>
    /// <param name="configureClientBuilder">An optional method that can be used for customizing the <see cref="IAzureClientBuilder{TClient, TOptions}"/>.</param>
    /// <remarks>Reads the configuration from "Aspire:Azure:Storage:Queues" section.</remarks>
    /// <exception cref="InvalidOperationException">Thrown when neither <see cref="AzureStorageQueuesSettings.ConnectionString"/> nor <see cref="AzureStorageQueuesSettings.ServiceUri"/> is provided.</exception>
    public static void AddAzureQueueClient(
        this IHostApplicationBuilder builder,
        string connectionName,
        Action<AzureStorageQueuesSettings>? configureSettings = null,
        Action<IAzureClientBuilder<QueueServiceClient, QueueClientOptions>>? configureClientBuilder = null)
    {
        new StorageQueueComponent().AddClient(builder, DefaultConfigSectionName, configureSettings, configureClientBuilder, connectionName, serviceKey: null);
    }
 
    /// <summary>
    /// Registers <see cref="QueueServiceClient"/> as a singleton for given <paramref name="name"/> in the services provided by the <paramref name="builder"/>.
    /// Enables retries, corresponding health check, logging and telemetry.
    /// </summary>
    /// <param name="builder">The <see cref="IHostApplicationBuilder" /> to read config from and add services to.</param>
    /// <param name="name">The name of the component, which is used as the <see cref="ServiceDescriptor.ServiceKey"/> of the service and also to retrieve the connection string from the ConnectionStrings configuration section.</param>
    /// <param name="configureSettings">An optional method that can be used for customizing the <see cref="AzureStorageQueuesSettings"/>. It's invoked after the settings are read from the configuration.</param>
    /// <param name="configureClientBuilder">An optional method that can be used for customizing the <see cref="IAzureClientBuilder{TClient, TOptions}"/>.</param>
    /// <remarks>Reads the configuration from "Aspire:Azure:Storage:Queues:{name}" section.</remarks>
    /// <exception cref="InvalidOperationException">Thrown when neither <see cref="AzureStorageQueuesSettings.ConnectionString"/> nor <see cref="AzureStorageQueuesSettings.ServiceUri"/> is provided.</exception>
    public static void AddKeyedAzureQueueClient(
        this IHostApplicationBuilder builder,
        string name,
        Action<AzureStorageQueuesSettings>? configureSettings = null,
        Action<IAzureClientBuilder<QueueServiceClient, QueueClientOptions>>? configureClientBuilder = null)
    {
        ArgumentException.ThrowIfNullOrEmpty(name);
 
        new StorageQueueComponent().AddClient(builder, DefaultConfigSectionName, configureSettings, configureClientBuilder, connectionName: name, serviceKey: name);
    }
 
    private sealed class StorageQueueComponent : AzureComponent<AzureStorageQueuesSettings, QueueServiceClient, QueueClientOptions>
    {
        protected override IAzureClientBuilder<QueueServiceClient, QueueClientOptions> AddClient(
            AzureClientFactoryBuilder azureFactoryBuilder, AzureStorageQueuesSettings settings, string connectionName,
            string configurationSectionName)
        {
            return ((IAzureClientFactoryBuilderWithCredential)azureFactoryBuilder).RegisterClientFactory<QueueServiceClient, QueueClientOptions>((options, cred) =>
            {
                var connectionString = settings.ConnectionString;
                if (string.IsNullOrEmpty(connectionString) && settings.ServiceUri is null)
                {
                    throw new InvalidOperationException($"A QueueServiceClient could not be configured. Ensure valid connection information was provided in 'ConnectionStrings:{connectionName}' or specify a 'ConnectionString' or 'ServiceUri' in the '{configurationSectionName}' configuration section.");
                }
 
                return !string.IsNullOrEmpty(connectionString)
                    ? new QueueServiceClient(connectionString, options)
                    : cred is not null
                        ? new QueueServiceClient(settings.ServiceUri, cred, options)
                        : new QueueServiceClient(settings.ServiceUri, options);
            }, requiresCredential: false);
        }
 
        protected override void BindClientOptionsToConfiguration(IAzureClientBuilder<QueueServiceClient, QueueClientOptions> clientBuilder, IConfiguration configuration)
        {
#pragma warning disable IDE0200 // Remove unnecessary lambda expression - needed so the ConfigBinder Source Generator works
            clientBuilder.ConfigureOptions(options => configuration.Bind(options));
#pragma warning restore IDE0200
        }
 
        protected override void BindSettingsToConfiguration(AzureStorageQueuesSettings settings, IConfiguration configuration)
        {
            configuration.Bind(settings);
        }
 
        protected override IHealthCheck CreateHealthCheck(QueueServiceClient client, AzureStorageQueuesSettings settings)
            => new AzureQueueStorageHealthCheck(client, new AzureQueueStorageHealthCheckOptions());
 
        protected override bool GetHealthCheckEnabled(AzureStorageQueuesSettings settings)
            => !settings.DisableHealthChecks;
 
        protected override TokenCredential? GetTokenCredential(AzureStorageQueuesSettings settings)
            => settings.Credential;
 
        protected override bool GetMetricsEnabled(AzureStorageQueuesSettings settings)
            => false;
 
        protected override bool GetTracingEnabled(AzureStorageQueuesSettings settings)
            => !settings.DisableTracing;
    }
}