using BpsRwApp.Models;

namespace BpsRwApp.Services;

/// <summary>
/// Service implementation untuk menangani logic bisnis halaman Home
/// Menggunakan base service untuk common functionality
/// </summary>
public class HomeService : BaseService, IHomeService
{
    private readonly IStatisticsService _statisticsService;
    private readonly ICacheService _cacheService;
    private readonly IAppConfigurationService _appConfig;

    /// <summary>
    /// Cache keys untuk optimasi performa
    /// </summary>
    private static class CacheKeys
    {
        public const string Features = "home_features";
        public const string Statistics = "home_statistics";
    }

    /// <summary>
    /// Constructor dengan dependency injection
    /// </summary>
    /// <param name="logger">Logger untuk logging</param>
    /// <param name="cache">Memory cache untuk caching</param>
    /// <param name="configuration">Configuration service</param>
    /// <param name="statisticsService">Service untuk statistik</param>
    /// <param name="cacheService">Cache service</param>
    /// <param name="appConfig">Application configuration service</param>
    public HomeService(
        ILogger<HomeService> logger,
        Microsoft.Extensions.Caching.Memory.IMemoryCache cache,
        IConfiguration configuration,
        IStatisticsService statisticsService,
        ICacheService cacheService,
        IAppConfigurationService appConfig) : base(logger, cache, configuration)
    {
        _statisticsService = statisticsService ?? throw new ArgumentNullException(nameof(statisticsService));
        _cacheService = cacheService ?? throw new ArgumentNullException(nameof(cacheService));
        _appConfig = appConfig ?? throw new ArgumentNullException(nameof(appConfig));
    }

    /// <inheritdoc/>
    public async Task<HomeViewModel> GetHomeViewModelAsync()
    {
        return await ExecuteWithErrorHandlingAsync(
            async () =>
            {
                var features = await GetFeaturesAsync();
                var statistics = await GetStatisticsAsync();

                return new HomeViewModel
                {
                    Title = _appConfig.ApplicationName,
                    Subtitle = "Kelola sampah Anda dengan mudah dan dapatkan reward!",
                    Features = features.ToList(),
                    Statistics = statistics
                };
            },
            "Creating home view model");
    }

    /// <inheritdoc/>
    public async Task<IEnumerable<FeatureModel>> GetFeaturesAsync()
    {
        return await _cacheService.GetOrSetAsync(
            CacheKeys.Features,
            LoadFeaturesFromSourceAsync,
            _appConfig.CacheSettings.FeaturesExpiration);
    }

    /// <summary>
    /// Loads features from source
    /// </summary>
    /// <returns>List of features</returns>
    private async Task<IEnumerable<FeatureModel>> LoadFeaturesFromSourceAsync()
    {
        using var scope = CreateLogScope("LoadFeaturesFromSource");

        // Simulate async data loading
        if (_appConfig.DevelopmentSettings.SimulatedDelayMs > 0)
        {
            await Task.Delay(_appConfig.DevelopmentSettings.SimulatedDelayMs);
        }
        else
        {
            await Task.Delay(1);
        }

        var features = new List<FeatureModel>
        {
            CreateFeature("♻️", "Kelola Sampah",
                "Catat dan kelola sampah Anda dengan sistem digital yang mudah"),

            CreateFeature("💰", "Dapatkan Reward",
                "Tukar poin sampah Anda dengan berbagai hadiah menarik"),

            CreateFeature("🌱", "Go Green",
                "Berkontribusi untuk lingkungan yang lebih bersih dan sehat"),

            CreateFeature("📊", "Tracking Real-time",
                "Monitor progress dan statistik sampah Anda secara real-time")
        };

        _logger.LogInformation("Successfully loaded {Count} features", features.Count);

        return features;
    }

    /// <inheritdoc/>
    public async Task<StatisticsModel> GetStatisticsAsync()
    {
        return await _cacheService.GetOrSetWithSlidingAsync(
            CacheKeys.Statistics,
            () => _statisticsService.GetCurrentStatisticsAsync(),
            _appConfig.CacheSettings.StatisticsSlidingExpiration,
            _appConfig.CacheSettings.StatisticsExpiration,
            Microsoft.Extensions.Caching.Memory.CacheItemPriority.High);
    }

    /// <summary>
    /// Helper method untuk membuat FeatureModel dengan DRY principle
    /// </summary>
    /// <param name="icon">Icon fitur</param>
    /// <param name="title">Judul fitur</param>
    /// <param name="description">Deskripsi fitur</param>
    /// <returns>FeatureModel instance</returns>
    private static FeatureModel CreateFeature(string icon, string title, string description)
    {
        return new FeatureModel
        {
            Icon = icon,
            Title = title,
            Description = description
        };
    }
}