#region Copyright & License Information
/*
 * Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version. For more
 * information, see COPYING.
 */
#endregion

using System.Linq;
using OpenRA.Graphics;
using OpenRA.Mods.Common.Traits;
using OpenRA.Network;
using OpenRA.Primitives;
using OpenRA.Traits;
using OpenRA.Widgets;

namespace OpenRA.Mods.Common.Widgets.Logic
{
	class GameInfoStatsLogic : ChromeLogic
	{
		[ObjectCreator.UseCtor]
		public GameInfoStatsLogic(Widget widget, World world, OrderManager orderManager, WorldRenderer worldRenderer)
		{
			var player = world.LocalPlayer;
			var playerPanel = widget.Get<ScrollPanelWidget>("PLAYER_LIST");

			if (player != null && !player.NonCombatant)
			{
				var checkbox = widget.Get<CheckboxWidget>("STATS_CHECKBOX");
				var statusLabel = widget.Get<LabelWidget>("STATS_STATUS");

				checkbox.IsChecked = () => player.WinState != WinState.Undefined;
				checkbox.GetCheckType = () => player.WinState == WinState.Won ?
					"checked" : "crossed";

				if (player.HasObjectives)
				{
					var mo = player.PlayerActor.Trait<MissionObjectives>();
					checkbox.GetText = () => mo.Objectives.First().Description;
				}

				statusLabel.GetText = () => player.WinState == WinState.Won ? "Accomplished" :
					player.WinState == WinState.Lost ? "Failed" : "In progress";
				statusLabel.GetColor = () => player.WinState == WinState.Won ? Color.LimeGreen :
					player.WinState == WinState.Lost ? Color.Red : Color.White;
			}
			else
			{
				// Expand the stats window to cover the hidden objectives
				var objectiveGroup = widget.Get("OBJECTIVE");
				var statsHeader = widget.Get("STATS_HEADERS");

				objectiveGroup.Visible = false;
				statsHeader.Bounds.Y -= objectiveGroup.Bounds.Height;
				playerPanel.Bounds.Y -= objectiveGroup.Bounds.Height;
				playerPanel.Bounds.Height += objectiveGroup.Bounds.Height;
			}

			var teamTemplate = playerPanel.Get<ScrollItemWidget>("TEAM_TEMPLATE");
			var playerTemplate = playerPanel.Get("PLAYER_TEMPLATE");
			playerPanel.RemoveChildren();

			var teams = world.Players.Where(p => !p.NonCombatant && p.Playable)
				.Select(p => new Pair<Player, PlayerStatistics>(p, p.PlayerActor.TraitOrDefault<PlayerStatistics>()))
				.OrderByDescending(p => p.Second != null ? p.Second.Experience : 0)
				.GroupBy(p => (world.LobbyInfo.ClientWithIndex(p.First.ClientIndex) ?? new Session.Client()).Team)
				.OrderByDescending(g => g.Sum(gg => gg.Second != null ? gg.Second.Experience : 0));

			foreach (var t in teams)
			{
				if (teams.Count() > 1)
				{
					var teamHeader = ScrollItemWidget.Setup(teamTemplate, () => true, () => { });
					teamHeader.Get<LabelWidget>("TEAM").GetText = () => t.Key == 0 ? "No Team" : "Team {0}".F(t.Key);
					var teamRating = teamHeader.Get<LabelWidget>("TEAM_SCORE");
					var scoreCache = new CachedTransform<int, string>(s => s.ToString());
					var teamMemberScores = t.Select(tt => tt.Second).Where(s => s != null).ToArray().Select(s => s.Experience);
					teamRating.GetText = () => scoreCache.Update(teamMemberScores.Sum());

					playerPanel.AddChild(teamHeader);
				}

				foreach (var p in t.ToList())
				{
					var pp = p.First;
					var client = world.LobbyInfo.ClientWithIndex(pp.ClientIndex);
					var item = playerTemplate.Clone();
					LobbyUtils.SetupProfileWidget(item, client, orderManager, worldRenderer);

					var nameLabel = item.Get<LabelWidget>("NAME");
					var nameFont = Game.Renderer.Fonts[nameLabel.Font];

					var suffixLength = new CachedTransform<string, int>(s => nameFont.Measure(s).X);
					var name = new CachedTransform<Pair<string, string>, string>(c =>
						WidgetUtils.TruncateText(c.First, nameLabel.Bounds.Width - suffixLength.Update(c.Second), nameFont) + c.Second);

					nameLabel.GetText = () =>
					{
						var suffix = pp.WinState == WinState.Undefined ? "" : " (" + pp.WinState + ")";
						if (client != null && client.State == Session.ClientState.Disconnected)
							suffix = " (Gone)";

						return name.Update(Pair.New(pp.PlayerName, suffix));
					};
					nameLabel.GetColor = () => pp.Color;

					var flag = item.Get<ImageWidget>("FACTIONFLAG");
					flag.GetImageCollection = () => "flags";
					if (player == null || player.Stances[pp] == Stance.Ally || player.WinState != WinState.Undefined)
					{
						flag.GetImageName = () => pp.Faction.InternalName;
						item.Get<LabelWidget>("FACTION").GetText = () => pp.Faction.Name;
					}
					else
					{
						flag.GetImageName = () => pp.DisplayFaction.InternalName;
						item.Get<LabelWidget>("FACTION").GetText = () => pp.DisplayFaction.Name;
					}

					var scoreCache = new CachedTransform<int, string>(s => s.ToString());
					item.Get<LabelWidget>("SCORE").GetText = () => scoreCache.Update(p.Second != null ? p.Second.Experience : 0);

					playerPanel.AddChild(item);
				}
			}

			var spectators = orderManager.LobbyInfo.Clients.Where(c => c.IsObserver).ToList();
			if (spectators.Any())
			{
				var spectatorHeader = ScrollItemWidget.Setup(teamTemplate, () => true, () => { });
				spectatorHeader.Get<LabelWidget>("TEAM").GetText = () => "Spectators";

				playerPanel.AddChild(spectatorHeader);

				foreach (var client in spectators)
				{
					var item = playerTemplate.Clone();
					LobbyUtils.SetupProfileWidget(item, client, orderManager, worldRenderer);

					var nameLabel = item.Get<LabelWidget>("NAME");
					var nameFont = Game.Renderer.Fonts[nameLabel.Font];

					var suffixLength = new CachedTransform<string, int>(s => nameFont.Measure(s).X);
					var name = new CachedTransform<Pair<string, string>, string>(c =>
						WidgetUtils.TruncateText(c.First, nameLabel.Bounds.Width - suffixLength.Update(c.Second), nameFont) + c.Second);

					nameLabel.GetText = () =>
					{
						var suffix = client.State == Session.ClientState.Disconnected ? " (Gone)" : "";
						return name.Update(Pair.New(client.Name, suffix));
					};

					item.Get<ImageWidget>("FACTIONFLAG").IsVisible = () => false;
					playerPanel.AddChild(item);
				}
			}
		}
	}
}