using System.Text.Json;
using System.Globalization;
using Application;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;

namespace Infrastructure
{
    public class CalendarioService : ICalendarioService
    {
        private const string Url = "https://www.ccee.org.br/en/web/guest/calendario?p_p_id=com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn&p_p_lifecycle=2&p_p_cacheability=cacheLevelPage&doAsUserId=&p_p_resource_id=calendarBookings";

        public async Task<double?> ObterEventoLimiteColetaAsync(DateTime dataReferencia, CancellationToken ct = default)
        {
            var year = dataReferencia.Year;
            var month = dataReferencia.Month - 1;
            var dayFinal = DateTime.DaysInMonth(year, month + 1);

            var values = new Dictionary<string, string>
            {
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_calendarIds"] = "55985",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_endTimeDay"] = dayFinal.ToString(),
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_endTimeHour"] = "23",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_endTimeMinute"] = "59",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_endTimeMonth"] = month.ToString(),
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_endTimeYear"] = year.ToString(),
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_eventsPerPage"] = "-1",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_startTimeDay"] = "1",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_startTimeHour"] = "0",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_startTimeMinute"] = "0",
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_startTimeMonth"] = month.ToString(),
                ["_com_liferay_calendar_web_portlet_CalendarPortlet_INSTANCE_urjn_startTimeYear"] = year.ToString(),
            };

            try
            {
                using var handler = new SocketsHttpHandler
                {
                    // Adiciona Accept-Encoding automaticamente e faz a descompressão transparente
                    AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate | DecompressionMethods.Brotli
                };
                using var client = new HttpClient(handler);
                using var content = new FormUrlEncodedContent(values);

                using var request = new HttpRequestMessage(HttpMethod.Post, Url)
                {
                    Content = content
                };

                // Headers solicitados
                request.Headers.Host = "www.ccee.org.br";
                request.Headers.UserAgent.ParseAdd("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36");
                request.Headers.Accept.Clear();
                request.Headers.Accept.ParseAdd("*/*");
                request.Headers.AcceptEncoding.Clear();
                request.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip"));
                request.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("deflate"));
                request.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("br"));
                request.Headers.Connection.Add("keep-alive");

                var resp = await client.SendAsync(request, ct);
                var resposta = await resp.Content.ReadAsStringAsync(ct);

                var alvo = $"Data limite para coleta diária dos dados de medição no SCDE";

                try
                {
                    using var doc = JsonDocument.Parse(resposta);

                    double? encontrado = null;
                    double? startTimeDay = null;

                    void SearchJson(JsonElement el)
                    {
                        if (encontrado != null) return;

                        if (el.ValueKind == JsonValueKind.Object)
                        {
                            // Verifica se alguma propriedade contém o texto alvo
                            foreach (var prop in el.EnumerateObject())
                            {
                                if (prop.Value.ValueKind == JsonValueKind.String)
                                {
                                    var s = prop.Value.GetString() ?? "";
                                    if (s.Contains(alvo, StringComparison.OrdinalIgnoreCase))
                                    {
                                        // Encontrou o evento, extrair dados do mesmo objeto
                                        if (el.TryGetProperty("startTimeDay", out var day))
                                            startTimeDay = day.GetInt32();
                                        if (startTimeDay != null)
                                            encontrado = startTimeDay;
                                        return;
                                    }
                                }
                            }

                            foreach (var prop in el.EnumerateObject())
                                SearchJson(prop.Value);
                        }
                        else if (el.ValueKind == JsonValueKind.Array)
                        {
                            foreach (var item in el.EnumerateArray())
                                SearchJson(item);
                        }
                    }

                    SearchJson(doc.RootElement);
                    if (encontrado != null) return encontrado;
                }
                catch { }

                return null;
            }
            catch
            {
                return null;
            }
        }
    }
}