using AllBase;
using AllBase.Helper;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using TemuKJD.BaseForms;
using Work.Services;

namespace TemuKJD.WXForms.ProductForms
{
	public partial class WXViolationLogsForm : BaseForm
	{
		private readonly BindingList<GoodsViolationLogEntity> rows = new BindingList<GoodsViolationLogEntity>();
		private Dictionary<int, string> reasons;
		private Dictionary<string, string> shops;
		private const int PageSize = 50;
		private readonly List<long> pageCursors = new List<long> { 0 };
		private int currentPage;

		public WXViolationLogsForm()
		{
			InitializeComponent();
			action.SelectedIndex = 0;
			grid.AutoGenerateColumns = false;
			grid.DataSource = rows;
		}

		private void Save_Click(object sender, EventArgs e)
		{
			var config = GlobalConfig.GlobalSettings;
			config.AutoReportViolationProducts = report.Checked;
			config.AutoExcludeViolationProductsOnUpload = exclude.Checked;
			config.AutoDelistViolationProducts = delist.Checked;
		
			StartUp.SaveGlobalSettings();
			message.Text = "配置已保存";
		}

		private void Form_VisibleChanged(object sender, EventArgs e)
		{
			if (!Visible) return;
			var config = GlobalConfig.GlobalSettings;
			report.Checked = config.AutoReportViolationProducts;
			exclude.Checked = config.AutoExcludeViolationProductsOnUpload;
			delist.Checked = config.AutoDelistViolationProducts;
			var selected = shop.SelectedValue as string;
			shops = GlobalConfig.ShopLoginList.Where(x => !string.IsNullOrWhiteSpace(x.ShopId))
				.GroupBy(x => x.ShopId).ToDictionary(g => g.Key, g => string.IsNullOrWhiteSpace(g.First().ShopAccount)
					? "未知店铺" : g.First().ShopAccount);
			shop.DataSource = new[] { new KeyValuePair<string, string>("", "全部店铺") }.Concat(shops).ToList();
			if (selected != null && shops.ContainsKey(selected)) shop.SelectedValue = selected;
		}

		private async void Query_Click(object sender, EventArgs e) => await QueryAsync(0, reset: true);

		private async void Pagination_PageChange(object sender)
		{
			int targetPage = pagination.CurrentPage - 1;
			if (targetPage != currentPage) await QueryAsync(targetPage);
		}

		private void Grid_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
		{
			if (e.Value == null) return;
			switch (grid.Columns[e.ColumnIndex].DataPropertyName)
			{
				case nameof(GoodsViolationLogEntity.ShopId):
					e.Value = shops.TryGetValue((string)e.Value, out var name) ? name : "未知店铺";
					e.FormattingApplied = true;
					break;
				case nameof(GoodsViolationLogEntity.ReasonId):
					e.Value = reasons.TryGetValue((int)e.Value, out var label) ? label : "未知违规类型";
					e.FormattingApplied = true;
					break;
				case nameof(GoodsViolationLogEntity.Action):
					var index = (int)(ViolationLogAction)e.Value;
					e.Value = index > 0 && index < action.Items.Count ? action.Items[index] : "未知日志动作";
					e.FormattingApplied = true;
					break;
			}
		}

		private async Task QueryAsync(int targetPage, bool reset = false)
		{
			if (!filters.Enabled) return;
			filters.Enabled = false;
			pagination.Enabled = false;
			try
			{
				if (reset)
				{
					currentPage = 0;
					pageCursors.Clear();
					pageCursors.Add(0);
					rows.Clear();

				}
				message.Text = "正在查询…";
				if (reasons == null)
				{
					var types = await CloudGoodsService.GetViolationReasons();
					if (IsDisposed) return;
					reasons = types.ToDictionary(type => type.Id, type => type.Name);
					reason.DataSource = new[] { new KeyValuePair<int, string>(0, "全部类型") }
						.Concat(types.Where(type => type.IsViolation).Select(type => new KeyValuePair<int, string>(type.Id, type.Name))).ToList();
				}
				var selected = shop.SelectedValue as string;
				var ids = string.IsNullOrEmpty(selected) ? shops.Keys.ToArray() : new[] { selected };
				if (ids.Length == 0) { message.Text = "暂无可查询的店铺"; return; }
				var reasonId = (int)reason.SelectedValue;
				var actionId = action.SelectedIndex;
				var cursor = pageCursors[targetPage];
				var matches = new List<GoodsViolationLogEntity>();
				while (matches.Count <= PageSize)
				{
					var batch = await CloudGoodsService.GetViolationLogs(ids, beforeId: cursor, size: PageSize);
					if (IsDisposed) return;
					foreach (var log in batch)
					{
						if (cursor != 0 && log.Id >= cursor) throw new InvalidOperationException("违规日志分页顺序异常。");
						cursor = log.Id;
						if ((reasonId == 0 || reasonId == log.ReasonId) && (actionId == 0 || actionId == (int)log.Action))
							matches.Add(log);
						if (matches.Count > PageSize) break;
					}
					if (batch.Count < PageSize) break;
				}

				if (matches.Count <= PageSize || pageCursors.ElementAtOrDefault(targetPage + 1) != matches[PageSize - 1].Id)
				{
					pageCursors.RemoveRange(targetPage + 1, pageCursors.Count - targetPage - 1);
					if (matches.Count > PageSize) pageCursors.Add(matches[PageSize - 1].Id);
				}
				currentPage = targetPage;
				rows.Clear();
				foreach (var log in matches.Take(PageSize)) rows.Add(log);

				message.Text = rows.Count == 0 ? "无匹配日志" : $"本页 {rows.Count} 条";
			}
			catch (Exception ex)
			{
				message.Text = "查询失败：" + ex.Message;
			}
			finally
			{
				if (!IsDisposed)
				{
					pagination.TotalPage = pageCursors.Count;
					if (pagination.CurrentPage != currentPage + 1) pagination.CurrentPage = currentPage + 1;
					filters.Enabled = true;
					pagination.Enabled = true;
				}
			}
		}

	}
}