#region Copyright & License Information
/*
 * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
 * This file is part of OpenRA.
 * 
 *  OpenRA is free software: you can redistribute it and/or modify
 *  it 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.
 * 
 *  OpenRA is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Linq;
using System.Collections.Generic;
using OpenRA.Mods.RA.Activities;
using OpenRA.Traits;
using OpenRA.Traits.Activities;

namespace OpenRA.Mods.RA
{
	class OreRefineryInfo : ITraitInfo
	{
		public readonly int PipCount = 0;
		public readonly PipType PipColor = PipType.Red;
		public readonly int Capacity = 0;
		public readonly int ProcessTick = 25;
		public readonly int ProcessAmount = 50;
		public readonly string DeathWeapon = null;
		public object Create (Actor self)
		{
			return new OreRefinery (self, this);
		}
	}

	class OreRefinery : ITick, IAcceptOre, INotifyDamage, INotifySold, INotifyCapture, IPips
	{
		readonly Actor self;
		readonly OreRefineryInfo Info;
		readonly PlayerResources Player;
		List<Actor> LinkedHarv;

		[Sync]
		int nextProcessTime = 0;
		[Sync]
		public int Ore = 0;

		public OreRefinery (Actor self, OreRefineryInfo info)
		{
			this.self = self;
			Info = info;
			Player = self.Owner.PlayerActor.traits.Get<PlayerResources> ();
			LinkedHarv = new List<Actor> ();
		}

		public void LinkHarvester (Actor self, Actor harv)
		{
			LinkedHarv.Add (harv);
		}

		public void UnlinkHarvester (Actor self, Actor harv)
		{
			if (LinkedHarv.Contains (harv))
				LinkedHarv.Remove (harv);
		}

		public void GiveOre (int amount)
		{
			Ore += amount;
			if (Ore > Info.Capacity)
				Ore = Info.Capacity;
		}

		public void Tick (Actor self)
		{
			if (--nextProcessTime <= 0) {
				// Convert resources to cash
				int amount = Math.Min (Ore, Info.ProcessAmount);
				amount = Math.Min (amount, Player.OreCapacity - Player.Ore);
				
				if (amount > 0) {
					Ore -= amount;
					Player.GiveOre (amount);
				}
				nextProcessTime = Info.ProcessTick;
			}
		}

		public void Damaged (Actor self, AttackInfo e)
		{
			if (self.IsDead) {
				if (Info.DeathWeapon != null && Ore > 0) {
					Combat.DoExplosion (e.Attacker, Info.DeathWeapon, self.CenterLocation.ToInt2 (), 0);
				}
				
				foreach (var harv in LinkedHarv)
					harv.traits.Get<Harvester> ().UnlinkProc (harv, self);
			}
		}

		public int2 DeliverOffset {get{ return new int2 (1, 2); }}
		public void OnDock (Actor harv, DeliverResources dockOrder)
		{
			var unit = harv.traits.Get<Unit> ();
			if (unit.Facing != 64)
				harv.QueueActivity (new Turn (64));
			
			harv.QueueActivity (new CallFunc (() =>
			{
				var renderUnit = harv.traits.Get<RenderUnit> ();
				if (renderUnit.anim.CurrentSequence.Name != "empty")
					renderUnit.PlayCustomAnimation (harv, "empty", () =>
					{
						harv.traits.Get<Harvester> ().Deliver (harv, self);
						harv.QueueActivity (new Harvest ());
					});
			}));
		}
		public void OnCapture (Actor self, Actor captor)
		{
			// Todo: Do the right thing if a harv is docked
			
			// Unlink any other harvs
			foreach (var harv in LinkedHarv)
				harv.traits.Get<Harvester> ().UnlinkProc (harv, self);
		}

		public void Selling (Actor self) {}
		public void Sold (Actor self)
		{
			foreach (var harv in LinkedHarv)
				harv.traits.Get<Harvester> ().UnlinkProc (harv, self);
		}

		public IEnumerable<PipType> GetPips (Actor self)
		{
			return Graphics.Util.MakeArray (Info.PipCount, i => (Ore * 1f / Info.Capacity > i * 1f / Info.PipCount) ? Info.PipColor : PipType.Transparent);
		}
	}
}