using DocumentFormat.OpenXml.InkML;
using HtmlAgilityPack;
using MailKit;
using Microsoft.Net.Http.Headers;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Dbas;
using Sarand.Net.Standard.Base.Helpers;
using Sarand.Net.Standard.Base.Net;
using Sarand.Net.Standard.Base.Utils;
using Saxonite.Net.Core.Web.Base.Controllers;
using Saxonite.Net.Standard.Base.App;
using Saxonite.Net.Standard.Base.Bus;
using Saxonite.Net.Standard.Base.Bus.Reference;
using Saxonite.Net.Standard.Base.Mgr.Reference;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;

namespace Saxonite.Net.Core.Web.Base.Procs
{
	//======================================================================
	public partial class SaxOrganisationEventsLookup : SaxProcess_Web
	{
		//-------------------------------------------------------------------
		// Definitions.
		public enum Task
		{
			LookupEvents
		}

		public new class Config : SaxProcess_Web.Config
		{
			public Config(SaxSessionContext sessionContext, DbUpdateInfo dbUpdateInfo) : base(sessionContext, dbUpdateInfo)
			{ }
			/// <summary>Organisations.</summary>
			public HashSet<SysId> OrganisationIdsIncluded { get; } = new HashSet<SysId>();
			/// <summary>Tasks to be run under this instance of the USGA Data Lookup process.</summary>
			public HashSet<Task> Tasks { get; } = new HashSet<Task>();
		}

		private class EventData
		{
			public DateTime EventAt { get; set; }
			public String Caption { get; set; }
		}

		//-------------------------------------------------------------------
		// Data members.
		private Config config;

		//-------------------------------------------------------------------
		// Construction.
		public SaxOrganisationEventsLookup(Config config) : base(config)
		{
			this.config = config;
		}

		//-------------------------------------------------------------------
		// Properties.

		public override string ProcessDescription => "Organisation Events Lookup";

		//-------------------------------------------------------------------
		// Run the process.
		protected override bool Run()
		{
			// Execute selected tasks.
			foreach (Task task in config.Tasks)
			{
				switch (task)
				{
					case Task.LookupEvents:
						LookupEventsForOrganisations();
						break;
				}
				if (!OK) break;
			}

			return OK;
		}

		//------------------------------------------------------------------
		// Event lookup.
		//------------------------------------------------------------------

		/// <summary>
		/// Organisation event lookup.
		/// </summary>
		private bool LookupEventsForOrganisations()
		{
			if (!OK) return false;

			using (DisposableCollection<IDisposable> disposableItems = new DisposableCollection<IDisposable>())
			{
				foreach (SysId organisationId in config.OrganisationIdsIncluded)
				{
					SaxOrganisation organisation = AccountMgr.GetOrganisationById(organisationId);
					if (organisation == null)
					{
						AddWarningMessage($"Organisation not found for Id: {organisationId}.");
						continue;
					}
					LookupOrganisationEvents(organisation);
				}
			}

			return OK;
		}

		/// <summary>
		/// Organisation event lookup.
		/// </summary>
		private bool LookupOrganisationEvents(SaxOrganisation organisation)
		{
			List<EventData> eventsData = new List<EventData>();

			try
			{


				// Query Countries on USGA website.
				CancellationToken cancelToken = new CancellationToken();
				SacsHttpRequestData request = new SacsHttpRequestData(cancelToken) { Url = "https://ncrdb.usga.org/" };
				SacsHttpResponseData response = SacsHttpClient.DoRequest(request).Result;
				String data = response.Data;

				if (!StringUtil.IsBlank(response.Data))
				{
					// Parse HTML.
					HtmlDocument htmlDoc = new HtmlDocument();
					htmlDoc.LoadHtml(response.Data);

					// Identify type of event schedule on page.
					HtmlNode mobiscrollEventCalendarNode = htmlDoc.GetElementbyId("mobiscroll-event-calendar");
					if (mobiscrollEventCalendarNode != null)
					{

					}
				}

				if (eventsData.Any())
				{

				}

			}
			catch (Exception exc)
			{
				SaLogger.Warn($"{SysUtil.Fn} {ExceptionUtil.GetLogMessage(exc, "querying organisation events", 8)}");
			}

			return OK;
		}

		/// <summary>
		/// Organisation event lookup by MobiScroll calendar.
		/// </summary>
		private bool LookupOrganisationEvents_MobiScrollCalendar(SaxOrganisation organisation, List<EventData> eventsData, HtmlNode calendarNode)
		{

			HtmlNode headerNode = calendarNode.Descendants("div").First(node => node.HasClass("mbsc-calendar-header"));
			if (headerNode != null)
			{
			}

			return OK;
		}

		//------------------------------------------------------------------
	}
	//======================================================================
}