/*
 * Pixel Dungeon
 * Copyright (C) 2012-2015  Oleg Dolya
 *
 * Shattered Pixel Dungeon
 * Copyright (C) 2014-2015 Evan Debenham
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>
 */
package com.shatteredpixel.shatteredpixeldungeon.ui;

import com.shatteredpixel.shatteredpixeldungeon.ShatteredPixelDungeon;
import com.shatteredpixel.shatteredpixeldungeon.levels.traps.Trap;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoTrap;
import com.watabou.noosa.Game;
import com.watabou.noosa.Gizmo;
import com.watabou.noosa.Image;
import com.watabou.noosa.ui.Button;
import com.watabou.noosa.ui.Component;
import com.shatteredpixel.shatteredpixeldungeon.Assets;
import com.shatteredpixel.shatteredpixeldungeon.Dungeon;
import com.shatteredpixel.shatteredpixeldungeon.DungeonTilemap;
import com.shatteredpixel.shatteredpixeldungeon.actors.Actor;
import com.shatteredpixel.shatteredpixeldungeon.actors.mobs.Mob;
import com.shatteredpixel.shatteredpixeldungeon.items.Heap;
import com.shatteredpixel.shatteredpixeldungeon.items.Item;
import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
import com.shatteredpixel.shatteredpixeldungeon.plants.Plant;
import com.shatteredpixel.shatteredpixeldungeon.scenes.CellSelector;
import com.shatteredpixel.shatteredpixeldungeon.scenes.GameScene;
import com.shatteredpixel.shatteredpixeldungeon.sprites.ItemSprite;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndCatalogus;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndHero;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoCell;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoItem;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoMob;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoPlant;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndBag;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndMessage;
import com.shatteredpixel.shatteredpixeldungeon.windows.WndTradeItem;

public class Toolbar extends Component {

	private Tool btnWait;
	private Tool btnSearch;
	private Tool btnInventory;
	private Tool[] btnQuick;

	public static int slots;
	public static boolean flipped;
	
	private PickedUpItem pickedUp;
	
	private boolean lastEnabled = true;
	private static boolean examining = false;
	
	public Toolbar() {
		super();

		slots = ShatteredPixelDungeon.quickSlots();
		flipped = ShatteredPixelDungeon.flippedUI();

		height = btnInventory.height();
	}
	
	@Override
	protected void createChildren() {
		
		add(btnWait = new Tool(24, 0, 20, 26) {
			@Override
			protected void onClick() {
				Dungeon.hero.rest(false);
			}

			protected boolean onLongClick() {
				Dungeon.hero.rest(true);
				return true;
			}

			;
		});
		
		add(btnSearch = new Tool(44, 0, 20, 26) {
			@Override
			protected void onClick() {
				if (!examining) {
					GameScene.selectCell(informer);
					examining = true;
				} else {
					informer.onSelect(null);
					Dungeon.hero.search(true);
				}
			}
		});

		btnQuick = new Tool[4];

		add( btnQuick[3] = new QuickslotTool( 64, 0, 22, 24, 3) );

		add( btnQuick[2] = new QuickslotTool( 64, 0, 22, 24, 2) );

		add(btnQuick[1] = new QuickslotTool(64, 0, 22, 24, 1));

		add(btnQuick[0] = new QuickslotTool(64, 0, 22, 24, 0));
		
		add(btnInventory = new Tool(0, 0, 24, 26) {
			private GoldIndicator gold;

			@Override
			protected void onClick() {
				GameScene.show(new WndBag(Dungeon.hero.belongings.backpack, null, WndBag.Mode.ALL, null));
			}

			protected boolean onLongClick() {
				GameScene.show(new WndCatalogus());
				return true;
			}

			;

			@Override
			protected void createChildren() {
				super.createChildren();
				gold = new GoldIndicator();
				add(gold);
			}

			;

			@Override
			protected void layout() {
				super.layout();
				gold.fill(this);
			}

			;
		});

		add(pickedUp = new PickedUpItem());
	}
	
	@Override
	protected void layout() {


		int[] visible = new int[4];

		for(int i = 0; i <= 3; i++)
			visible[i] = (int)((slots > i) ? y+2 : y+25);

		for(int i = 0; i <= 3; i++)
			btnQuick[i].visible = slots > i;

		if (!flipped) {
			btnWait.setPos(x, y);
			btnSearch.setPos(btnWait.right(), y);

			btnInventory.setPos(width - btnInventory.width(), y);

			int ofs = (slots == 4 && btnInventory.left() - btnSearch.right() < 90) ? 2 : 0;

			btnQuick[0].setPos(btnInventory.left() - btnQuick[0].width() + ofs, visible[0]);
			btnQuick[1].setPos(btnQuick[0].left() - btnQuick[1].width() + ofs, visible[1]);
			btnQuick[2].setPos(btnQuick[1].left() - btnQuick[2].width() + ofs, visible[2]);
			btnQuick[3].setPos(btnQuick[2].left() - btnQuick[3].width() + ofs, visible[3]);
		} else {
			btnWait.setPos(width - btnWait.width(), y);
			btnSearch.setPos(btnWait.left() - btnSearch.width(), y);

			btnInventory.setPos(x, y);

			int ofs = (slots == 4 && btnSearch.left() - btnInventory.right() < 90) ? 2 : 0;

			btnQuick[0].setPos(btnInventory.right() - ofs, visible[0]);
			btnQuick[1].setPos(btnQuick[0].right() - ofs, visible[1]);
			btnQuick[2].setPos(btnQuick[1].right() - ofs, visible[2]);
			btnQuick[3].setPos(btnQuick[2].right() - ofs, visible[3]);
		}



	}
	
	@Override
	public void update() {
		super.update();
		
		if (lastEnabled != Dungeon.hero.ready) {
			lastEnabled = Dungeon.hero.ready;
			
			for (Gizmo tool : members) {
				if (tool instanceof Tool) {
					((Tool)tool).enable( lastEnabled );
				}
			}
		}
		
		if (!Dungeon.hero.isAlive()) {
			btnInventory.enable(true);
		}

		//check if visible slots or UI flipping has changed.
		if ((slots == 0 && btnQuick[0].visible) || (slots != 0 && !btnQuick[slots-1].visible)){
			layout();
		} else if (flipped && btnWait.left() == 0 || !flipped && btnInventory.left() == 0){
			layout();
		}
	}
	
	public void pickup( Item item ) {
		pickedUp.reset( item,
			btnInventory.centerX(),
			btnInventory.centerY() );
	}
	
	private static CellSelector.Listener informer = new CellSelector.Listener() {
		@Override
		public void onSelect( Integer cell ) {

			examining = false;
			
			if (cell == null) {
				return;
			}
			
			if (cell < 0 || cell > Level.LENGTH || (!Dungeon.level.visited[cell] && !Dungeon.level.mapped[cell])) {
				GameScene.show( new WndMessage( "You don't know what is there." ) ) ;
				return;
			}
			
			if (cell == Dungeon.hero.pos) {
				GameScene.show( new WndHero() );
				return;
			}

			if (Dungeon.visible[cell]) {

				Mob mob = (Mob) Actor.findChar(cell);
				if (mob != null) {
					GameScene.show(new WndInfoMob(mob));
					return;
				}

				Heap heap = Dungeon.level.heaps.get(cell);
				if (heap != null) {
					if (heap.type == Heap.Type.FOR_SALE && heap.size() == 1 && heap.peek().price() > 0) {
						GameScene.show(new WndTradeItem(heap, false));
					} else {
						GameScene.show(new WndInfoItem(heap));
					}
					return;
				}

			}
			
			Plant plant = Dungeon.level.plants.get( cell );
			if (plant != null) {
				GameScene.show( new WndInfoPlant( plant ) );
				return;
			}

			Trap trap = Dungeon.level.traps.get( cell );
			if (trap != null && trap.visible) {
				GameScene.show( new WndInfoTrap( trap ));
				return;
			}
			
			GameScene.show( new WndInfoCell( cell ) );
		}
		@Override
		public String prompt() {
			return "Select a cell to examine";
		}
	};
	
	private static class Tool extends Button {
		
		private static final int BGCOLOR = 0x7B8073;
		
		private Image base;
		
		public Tool( int x, int y, int width, int height ) {
			super();
			
			base.frame( x, y, width, height );
			
			this.width = width;
			this.height = height;
		}
		
		@Override
		protected void createChildren() {
			super.createChildren();
			
			base = new Image( Assets.TOOLBAR );
			add( base );
		}
		
		@Override
		protected void layout() {
			super.layout();
			
			base.x = x;
			base.y = y;
		}
		
		@Override
		protected void onTouchDown() {
			base.brightness( 1.4f );
		}
		
		@Override
		protected void onTouchUp() {
			if (active) {
				base.resetColor();
			} else {
				base.tint( BGCOLOR, 0.7f );
			}
		}
		
		public void enable( boolean value ) {
			if (value != active) {
				if (value) {
					base.resetColor();
				} else {
					base.tint( BGCOLOR, 0.7f );
				}
				active = value;
			}
		}
	}
	
	private static class QuickslotTool extends Tool {
		
		private QuickSlotButton slot;
		
		public QuickslotTool( int x, int y, int width, int height, int slotNum ) {
			super( x, y, width, height );

			slot = new QuickSlotButton( slotNum );
			add( slot );
		}
		
		@Override
		protected void layout() {
			super.layout();
			slot.setRect( x + 2, y + 2, width - 4, height - 3 );
		}
		
		@Override
		public void enable( boolean value ) {
			super.enable( value );
			slot.enable( value );
		}
	}
	
	private static class PickedUpItem extends ItemSprite {
		
		private static final float DISTANCE = DungeonTilemap.SIZE;
		private static final float DURATION = 0.2f;
		
		private float dstX;
		private float dstY;
		private float left;
		
		public PickedUpItem() {
			super();
			
			originToCenter();
			
			active =
			visible =
				false;
		}
		
		public void reset( Item item, float dstX, float dstY ) {
			view( item );
			
			active =
			visible =
				true;
			
			this.dstX = dstX - ItemSprite.SIZE / 2;
			this.dstY = dstY - ItemSprite.SIZE / 2;
			left = DURATION;
			
			x = this.dstX - DISTANCE;
			y = this.dstY - DISTANCE;
			alpha( 1 );
		}
		
		@Override
		public void update() {
			super.update();
			
			if ((left -= Game.elapsed) <= 0) {
				
				visible =
				active =
					false;
				if (emitter != null) emitter.on = false;
				
			} else {
				float p = left / DURATION;
				scale.set( (float)Math.sqrt( p ) );
				float offset = DISTANCE * p;
				x = dstX - offset;
				y = dstY - offset;
			}
		}
	}
}