// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using System.Reflection;
using Google.Cloud.Diagnostics.Common;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using OpenTelemetry.Trace;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Plugins;
using Squidex.Log;

namespace Squidex.Extensions.APM.Stackdriver;

public sealed class StackdriverPlugin : IPlugin
{
    private sealed class Configurator(string projectId) : ITelemetryConfigurator
    {
        public void Configure(TracerProviderBuilder builder)
        {
            builder.UseStackdriverExporter(projectId);
        }
    }

    public void ConfigureServices(IServiceCollection services, IConfiguration config)
    {
        var isEnabled = config.GetValue<bool>("logging:stackdriver:enabled");

        if (!isEnabled)
        {
            return;
        }

        var projectId = config.GetValue<string>("logging:stackdriver:projectId");

        if (string.IsNullOrWhiteSpace(projectId))
        {
            return;
        }

        services.AddSingleton<ITelemetryConfigurator>(
            new Configurator(projectId));

        services.AddSingleton<ILogAppender,
            StackdriverSeverityLogAppender>();

        services.AddSingleton<ILogAppender,
            StackdriverExceptionHandler>();

        var serviceName = config.GetValue<string>("logging:name") ?? "Squidex";
        var serviceVersion = Assembly.GetEntryAssembly()?.GetName().Version?.ToString();

        services.AddSingleton(c => ContextExceptionLogger.Create(projectId, serviceVersion, serviceVersion, null));
    }
}