module Items.Items
    (Item(Item),
     itemPos,
     itemTexture,
     itemEffect,
     itemName,
     ItemButton(ItemButton),
     itemButPos,
     itemButTexture,
     itemButDesc,
     itemButItem,
     itemButCount,
     itemRect,
     itemIntersects,
     drawItem,
     drawItemAt,
     drawItemBut,
     mouseOverItemBut) where

import Graphics.Rendering.OpenGL as GL
import Nxt.Graphics
import Nxt.Types
import Input.InputState hiding (mouseX, mouseY)
import Cat.Cat

data Item = Item
    {
        itemPos         :: Nxt.Types.Vector2d,
        itemTexture     :: Nxt.Types.Texture,
        itemEffect      :: Cat -> Cat,
        itemName        :: String
    }
instance Eq Item where
    i1 == i2    = itemName i1 == itemName i2
    i1 /= i2    = itemName i1 /= itemName i2

data ItemButton = ItemButton
    {
        itemButPos     :: Nxt.Types.Vector2d,
        itemButTexture :: Nxt.Types.Texture,
        itemButDesc    :: String,
        itemButItem    :: Item,
        itemButCount   :: Int
    }

-- itemRect
itemRect :: Item -> Nxt.Types.Rect
itemRect (Item (x,y) t _ _) =
    Nxt.Types.Rect x y (fromIntegral $ textureWidth t) (fromIntegral $ textureHeight t)

-- itemIntersects
itemIntersects :: Item -> Item -> Bool
itemIntersects item1 item2 = rectIntersect (itemRect item1) (itemRect item2)

-- drawItemAt
drawItemAt :: Double -> Double -> Item -> IO ()
drawItemAt x y (Item _ itemTex _ _) = do
    let x' = x - (fromIntegral $ textureWidth itemTex :: Double) / 2.0
        y' = y - (fromIntegral $ textureHeight itemTex :: Double) / 2.0
    Nxt.Graphics.drawTexture x' y' itemTex (1.0::GLdouble)

-- drawItem
drawItem :: Item -> IO ()
drawItem (Item (itemX, itemY) itemTex _ _) =
    Nxt.Graphics.drawTexture itemX itemY itemTex (1.0::GLdouble)

-- drawItemBut
drawItemBut :: ItemButton -> IO ()
drawItemBut (ItemButton (itemPosX, itemPosY) itemTex _ _ _) =
    Nxt.Graphics.drawTexture itemPosX itemPosY itemTex (1.0::GLdouble)

-- mouseOverItemBut
mouseOverItemBut :: MousePos -> ItemButton -> Bool
mouseOverItemBut (MousePos mouseX mouseY) (ItemButton (itemX, itemY) itemTex _ _ _) =
    pointInRect (fromIntegral mouseX, fromIntegral mouseY) itemRectBut
    where
        itemRectBut = Nxt.Types.Rect itemX itemY (fromIntegral $ textureWidth itemTex) (fromIntegral $ textureHeight itemTex)