package ch.asynk.tankontank.game;

import java.util.List;
import java.util.Iterator;

import com.badlogic.gdx.graphics.g2d.TextureAtlas;

import ch.asynk.tankontank.engine.Board;
import ch.asynk.tankontank.engine.Pawn;
import ch.asynk.tankontank.engine.Tile;
import ch.asynk.tankontank.engine.Orientation;
import ch.asynk.tankontank.game.Unit.UnitType;

public class Hex extends Tile
{
    public enum Terrain implements TileTerrain
    {
        OFFMAP,
        BLOCKED,
        CLEAR,
        HILLS,
        WOODS,
        TOWN
    }

    public static final int FOG         = 0;
    public static final int SELECT      = 1;
    public static final int AREA        = 2;
    public static final int MOVE        = 3;
    public static final int DIRECTIONS  = 4;
    public static final int ORIENTATION = 5;
    public static final int OBJECTIVE   = 6;    // unclaimed
    public static final int OBJECTIVE_GE= 7;
    public static final int OBJECTIVE_US= 8;

    public Terrain terrain;
    public int roads;

    public String toString()
    {
        return "(" + col + ";" + row + ") [" + x + ";" + y + "]  " + "t:" + terrain + " r:" + roads;
    }

    public Hex(float x, float y, int col, int row, TextureAtlas atlas)
    {
        super(x, y, col, row, atlas);
        this.terrain = Terrain.CLEAR;
        this.roads = 0;
    }

    public Unit getUnit()
    {
        if (isEmpty()) return null;
        return (Unit) iterator().next();
    }

    @Override
    public boolean isA(TileTerrain terrain)
    {
        return (this.terrain == terrain);
    }

    @Override
    public boolean isOffMap()
    {
        return isA(Terrain.OFFMAP);
    }

    @Override
    public boolean blockLineOfSightFrom(Tile tile)
    {
        if (isA(Terrain.CLEAR) && !hasUnits())
            return false;

        if (tile.isA(Terrain.HILLS) && isA(Terrain.CLEAR))
            return false;

        return true;
    }

    @Override
    public boolean atLeastOneMove(Pawn pawn)
    {
        if (hasUnits() || isA(Terrain.BLOCKED) || isA(Terrain.OFFMAP))
            return false;
        return true;
    }

    @Override
    public boolean road(Orientation side)
    {
        return (side.s == (roads & side.s));
    }

    @Override
    public int costFrom(Pawn pawn, Orientation side)
    {
        if (hasUnits()) return Integer.MAX_VALUE;
        if (road(side)) return 1;

        int c = 0;
        switch(terrain) {
            case CLEAR:
            case HILLS:
                c = 1;
                break;
            case WOODS:
            case TOWN:
                c = 2;
                break;
            case OFFMAP:
            case BLOCKED:
                c = Integer.MAX_VALUE;
                break;
        }

        return c;
    }

    @Override
    public int defense()
    {
        return (isA(Terrain.TOWN) ? 1 : 0);
    }
}