using System.Diagnostics.CodeAnalysis;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using OpenHarbor.JwtTokenManager.Abstractions;

namespace OpenHarbor.JwtTokenManager;

public static class ServiceCollectionExtensions
{
  private static bool _defaultRegistered = false;
  
  [RequiresDynamicCode("Not AoT safe signature. Will add one in the future.")]
  public static IServiceCollection AddJwtTokenManager(
    this IServiceCollection services,
    IConfiguration configuration,
    string sectionName,
    string? name = null,
    Action<JwtTokenManagerBuilderOptions>? configureBuilderOptions = null) 
  {
    if (configuration == null)
      throw new ArgumentNullException(nameof(configuration));
    if (string.IsNullOrWhiteSpace(sectionName))
      throw new ArgumentException("Section name must be provided.", nameof(sectionName));

    name ??= sectionName;

    services.Configure<JwtTokenManagerOptions>(name, configuration.GetSection(sectionName));

    var builderOptions = new JwtTokenManagerBuilderOptions();
    configureBuilderOptions?.Invoke(builderOptions);

    services.AddKeyedSingleton<IJwtTokenManagerService>(name, (provider, key) =>
    {
      var optionsMonitor = provider.GetRequiredService<IOptionsMonitor<JwtTokenManagerOptions>>();
      var options = optionsMonitor.Get(name);

      builderOptions.AdditionalConfiguration?.Invoke(options);

      var cacheOptions = new JwtTokenManagerCacheOptions();
      builderOptions.CacheOptions?.Invoke(cacheOptions);

      var memoryCache = builderOptions.CacheFactory?.Invoke(provider) ?? provider.GetService<IMemoryCache>();
      var httpClientFactory = provider.GetRequiredService<IHttpClientFactory>();
      var logger = provider.GetService<ILogger<JwtTokenManagerService>>();

      return new JwtTokenManagerService(options, httpClientFactory, logger, memoryCache, cacheOptions);
    });

    if (!_defaultRegistered)
    {
      services.AddSingleton<IJwtTokenManagerService>(sp =>
        sp.GetRequiredKeyedService<IJwtTokenManagerService>(name));

      _defaultRegistered = true;
    }

    return services;
  }
  
  [RequiresDynamicCode("Not AoT safe signature. Will add one in the future.")]
  public static IServiceCollection AddJwtTokenManager(
    this IServiceCollection services,
    IConfiguration configuration,
    string sectionName,
    Action<JwtTokenManagerBuilderOptions>? configureBuilderOptions = null)
  {
    return AddJwtTokenManager(services, configuration, sectionName, null, configureBuilderOptions);
  }
}