using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using IjwFramework.Types;
using OpenRa.Game.Graphics;
using OpenRa.Game.GameRules;
using OpenRa.FileFormats;
using OpenRa.Game;

namespace OpenRa.Game.Traits
{
	class RenderBuilding : RenderSimple
	{
		const int SmallBibStart = 1;
		const int LargeBibStart = 5;

		public RenderBuilding(Actor self)
			: base(self)
		{
			anim.PlayThen("make", () => anim.PlayRepeating("idle"));

			// at this point, we already know where we are, so we can safely place the bib in the smudge
			if (((UnitInfo.BuildingInfo)self.unitInfo).Bib)
			{
				var fp = Rules.Footprint.GetFootprint(self.unitInfo.Name);
				var bibOffset = fp.Length - 2;
				var hasSmallBib = fp.First().Length == 2;

				if (hasSmallBib)
					for (int i = 0; i < 4; i++)
						Game.map.MapTiles[
							self.Location.X + i % 2 + Game.map.Offset.X,
							self.Location.Y + i / 2 + Game.map.Offset.Y + bibOffset].smudge = (byte)(i + SmallBibStart);
				else
					for (int i = 0; i < 6; i++)
						Game.map.MapTiles[
							self.Location.X + i % 3 + Game.map.Offset.X,
							self.Location.Y + i / 3 + Game.map.Offset.Y + bibOffset].smudge = (byte)(i + LargeBibStart);
			}
		}

		public override IEnumerable<Pair<Sprite, float2>> Render(Actor self)
		{
			yield return Pair.New(anim.Image, 24f * (float2)self.Location);
		}
	}
}