using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using System.Net.Http.Json;
using Mercados.Core.Entities;
using Mercados.Infrastructure.Persistence.Repositories;
using System.Text.Json.Serialization;

namespace Mercados.Infrastructure.DataFetchers
{
    // Añadimos las clases DTO necesarias para deserializar la respuesta de Finnhub
    public class MarketHolidayResponse
    {
        [JsonPropertyName("data")]
        public List<MarketHoliday>? Data { get; set; }
    }
    public class MarketHoliday
    {
        [JsonPropertyName("at")]
        public string? At { get; set; }

        [JsonIgnore]
        public DateOnly Date => DateOnly.FromDateTime(DateTime.Parse(At!));
    }

    public class HolidayDataFetcher : IDataFetcher
    {
        public string SourceName => "Holidays";
        private readonly string[] _marketCodes = { "US", "BA" };

        private readonly IHttpClientFactory _httpClientFactory;
        private readonly IMercadoFeriadoRepository _feriadoRepository;
        private readonly IConfiguration _configuration;
        private readonly ILogger<HolidayDataFetcher> _logger;

        public HolidayDataFetcher(
            IHttpClientFactory httpClientFactory,
            IMercadoFeriadoRepository feriadoRepository,
            IConfiguration configuration,
            ILogger<HolidayDataFetcher> logger)
        {
            _httpClientFactory = httpClientFactory;
            _feriadoRepository = feriadoRepository;
            _configuration = configuration;
            _logger = logger;
        }

        public async Task<(bool Success, string Message)> FetchDataAsync()
        {
            _logger.LogInformation("Iniciando actualización de feriados desde Finnhub.");
            var apiKey = _configuration["ApiKeys:Finnhub"];
            if (string.IsNullOrEmpty(apiKey)) return (false, "API Key de Finnhub no configurada.");

            var client = _httpClientFactory.CreateClient("FinnhubDataFetcher");

            foreach (var marketCode in _marketCodes)
            {
                try
                {
                    var apiUrl = $"https://finnhub.io/api/v1/stock/market-holiday?exchange={marketCode}&token={apiKey}";
                    // Ahora la deserialización funcionará porque la clase existe
                    var response = await client.GetFromJsonAsync<MarketHolidayResponse>(apiUrl);

                    if (response?.Data != null)
                    {
                        var nuevosFeriados = response.Data.Select(h => new MercadoFeriado
                        {
                            CodigoMercado = marketCode,
                            Fecha = h.Date.ToDateTime(TimeOnly.MinValue),
                            Nombre = "Feriado Bursátil"
                        }).ToList();

                        await _feriadoRepository.ReemplazarFeriadosPorMercadoAsync(marketCode, nuevosFeriados);
                        _logger.LogInformation("Feriados para {MarketCode} actualizados exitosamente: {Count} registros.", marketCode, nuevosFeriados.Count);
                    }
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Falló la obtención de feriados para {MarketCode}.", marketCode);
                }
            }
            return (true, "Actualización de feriados completada.");
        }
    }
}