using Luna.Channels.Abstractions;
using Luna.Channels.Telegram;
using Luna.Configuration;
using Luna.Configuration.Extensions;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using Telegram.Bot;

namespace Luna.Channels.Extensions;

public static class ServiceCollectionExtensions
{
    extension(IServiceCollection services)
    {
        public IServiceCollection AddChannels()
        {
            services.AddSingleton<IChannelManager, ChannelManager>();

            // Telegram — BotToken is bound from configuration ("Channels:Telegram"),
            // supplied via the Channels__Telegram__BotToken environment variable.
            services.AddTelegramOptions();
            services.AddSingleton(provider => provider.GetRequiredService<IOptions<TelegramOptions>>().Value);
            services.AddSingleton<ITelegramBotClient>(provider =>
                new TelegramBotClient(provider.GetRequiredService<TelegramOptions>().BotToken));
            services.AddHostedService<TelegramAdapter>();

            return services;
        }
    }
}