using IF.Lastfm.Core.Api;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Quartz;
using Selector.Model;
using Selector.Model.Extensions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Selector.CLI.Jobs
{
    public class ScrobbleWatcherJob : IJob
    {
        private readonly ILogger<ScrobbleWatcherJob> logger;
        private readonly ILoggerFactory loggerFactory;

        private readonly IUserApi userApi;
        private readonly IScrobbleRepository scrobbleRepo;
        private readonly ApplicationDbContext db;
        private readonly ScrobbleWatcherJobOptions options;

        public ScrobbleWatcherJob(
            IUserApi _userApi,
            IScrobbleRepository _scrobbleRepo,
            ApplicationDbContext _db,
            IOptions<ScrobbleWatcherJobOptions> _options,
            ILogger<ScrobbleWatcherJob> _logger, 
            ILoggerFactory _loggerFactory)
        {
            logger = _logger;
            loggerFactory = _loggerFactory;

            userApi = _userApi;
            scrobbleRepo = _scrobbleRepo;
            db = _db;
            options = _options.Value;
        }

        public async Task Execute(IJobExecutionContext context)
        {
            logger.LogInformation("Starting scrobble watching job");

            var users = db.Users
                .AsEnumerable()
                .Where(u => u.ScrobbleSavingEnabled())
                .ToArray();

            foreach (var user in users)
            {
                logger.LogInformation("Saving scrobbles for {}/{}", user.UserName, user.LastFmUsername);

                if (options.From is not null && options.From.Value.Kind != DateTimeKind.Utc)
                {
                    options.From = options.From.Value.ToUniversalTime();
                }

                if (options.To is not null && options.To.Value.Kind != DateTimeKind.Utc)
                {
                    options.To = options.To.Value.ToUniversalTime();
                }

                var saver = new ScrobbleSaver(
                    userApi,
                    new()
                    {
                        User = user,
                        InterRequestDelay = options.InterRequestDelay,
                        From = options.From,
                        To = options.To,
                        PageSize = options.PageSize,
                        DontAdd = false,
                        DontRemove = false,
                        SimultaneousConnections = options.Simultaneous
                    },
                    scrobbleRepo,
                    loggerFactory.CreateLogger<ScrobbleSaver>(),
                    loggerFactory);

                await saver.Execute(context.CancellationToken);

                logger.LogInformation("Finished scrobbles for {}/{}", user.UserName, user.LastFmUsername);
            }
        }
    }
}