/*
 * Date: 12/16/2005
 * Time: 9:31 PM
 * 
 * Copyright 2005, Static Boy Productions
 */

using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;

using Jessie.AI.Tasks;
using Jessie.GameState;
using Jessie.Utils;

namespace Jessie.AI
{
	/// <summary>
	/// Description of jtbvGameAI.
	/// </summary>
	public class jtbvGameAI
	{
		private const string CRLF = "\r\n";
		
		private ArrayList votes;
		private Point target;
		private jtbvGameState state;
		
		public jtbvGameAI(jtbvGameState State)
		{
			votes = new ArrayList();
			target = new Point();
			state = State;
			//currentAction;
		}		
		
		public IEnumerator<string> GetEnumerator()
		{
			// Vote for the next task
			jtbvTask electedTask = this.ElectTask(state);
			
			if (electedTask == null)
			{
				// ERROR!!!
				Console.WriteLine("Election came up blank!");
				yield return " ";
			}
			else
			{
				foreach (string cmd in electedTask)
				{
					if ((state.MoreRequested) || (state.Player.Dead))
					{
						state.MoreRequested = false;
						yield return " ";
					}
					else if (state.FullRedrawRequested)
					{
						state.FullRedrawRequested = false;
						yield return ((char) 0x12).ToString();
					}

					yield return cmd;
				}
			}
		}
		
		string lastModeString = "";
		
		private jtbvTask ElectTask(jtbvGameState state)
		{
			jtbvTask retVal = null;
			
			votes.Clear();
			
			switch (state.Mode)
			{
				case jtbvMode.GAME:
					if (state.CurrDlvl.Curiosities.Count > 0) // If we have questions about a dungeon feature
					{
						//Console.WriteLine("There are " + gameState.CurrDlvl.Curiosities.Count.ToString() + " requests in the curiosities list.");
						Vote("INQUIRE_ABOUT", 80, (Point) state.CurrDlvl.Curiosities[0]);
					}
					if (state.Player.Hunger >= jtbvHungerStatus.WEAK)
					{
						Vote("FIX_HUNGER", 20 * (int) state.Player.Hunger);
					}
					if (state.CurrDlvl.DownStairsKnown())//) && (gameState.Player.Stats.Lvl > gameState.CurrentDepth))
					{
						Vote("DESCEND", 5);
					}
					if (state.CurrDlvl.GetDanger(state.Player.Loc) > 0)
					{
						Vote("ATTACK", 40);
					}
					if (state.Player.Stats.HP <= (state.Player.Stats.MaxHP / 3))
					{
						Vote("HEAL", 50);
					}
					if ((!state.ExcalCreated) && (state.Player.Stats.Lvl >= 5))
					{
						Vote("GET_EXCAL", 15);
					}
					
					if (state.CurrDlvl[state.Player.Loc].LowestAdjacentSearchValue() == 0)
					{
						Vote("SEARCH", 10);
					}
					
					Vote("EXPLORE", 8);
					Vote("EXPLORE_SEARCH", 2);
					Vote("WANDER", 1);
					break;
				case jtbvMode.TEXT_PROMPT:
					Vote("ANSWER_QUESTION", 100);
					break;
				case jtbvMode.PROMPT:
				case jtbvMode.YN_PROMPT:
					Vote("ANSWER_PROMPT", 100);
					break;
				case jtbvMode.WINDOW_LIST:
					Vote("ANSWER_QUESTION", 100);
					break;
				case jtbvMode.DGAMELAUNCH:
					Vote("DGAMELAUNCH_LOGIN", 100);
					break;
				case jtbvMode.UNKNOWN:
				default:
					break;
			}
			
			votes.Sort();
			votes.Reverse();
			
			if (votes.Count > 0)
			{
				int voteCnt = 0;
				
				while (voteCnt < votes.Count)
				{
					jtbvActionVote choice = votes[voteCnt] as jtbvActionVote;

					retVal = GetTask(choice);
					retVal.State = state;

					//Console.WriteLine("Voting trying to get '" + choice.ActionName + "'");

					// TODO: Implement somthing like this.
					if (retVal.CanExecute)
					{
						if (lastModeString != choice.ActionName)
							Console.WriteLine(choice.ActionName);
						else
							Console.Write(".");
						
						lastModeString = choice.ActionName;

						break; // If that vote can execute, break out of the loop so that we keep this action.
					}
					voteCnt++;
				}
				
			}
			else
			{
				Console.WriteLine("ERROR! No votes cast!");
				retVal = null;
			}
			
			return retVal;
		}
		
		private void Vote(string cmd, int weight)
		{
			votes.Add(new jtbvActionVote(cmd, target, weight));
		}
		
		private void Vote(string cmd, int weight, Point loc)
		{
			votes.Add(new jtbvActionVote(cmd, loc, weight));
		}
		
		private jtbvTask GetTask(jtbvActionVote choice)
		{
			jtbvTask retVal = null;
			
			switch (choice.ActionName.ToUpper())
			{
				case "FIX_HUNGER":
					retVal = new jtbvTaskFixHunger();
					break;
				case "EXPLORE":
					retVal = new jtbvTaskExplore(false);
					break;
				case "EXPLORE_SEARCH":
					retVal = new jtbvTaskExplore(true);
					break;
				case "SEARCH":
					retVal = new jtbvTaskSearch();
					break;
				case "WANDER":
					retVal = new jtbvTaskWander();
					break;
				case "GET_EXCAL":
					retVal = new jtbvTaskGetExcal();
					break;
				case "DGAMELAUNCH_LOGIN":
					retVal = new jtbvTaskDGameLaunch();
					break;
				case "INQUIRE_ABOUT":
					retVal = new jtbvTaskInquireAbout(choice.Location);
					break;
				case "DESCEND":
					retVal = new jtbvTaskDescend();
					break;
				case "ATTACK":
					retVal = new jtbvTaskAttack();
					break;
				case "HEAL":
					retVal = new jtbvTaskFixHealth();
					break;
				case "ANSWER_QUESTION":
					retVal = new jtbvTaskAnswerQuestion();
					break;
				case "ANSWER_PROMPT":
					retVal = new jtbvTaskAnswerPrompt();
					break;
			}
			
			return retVal;
		}
	}
}