package gamemap

import "lab.zaar.be/thefish/alchemyst-go/util"
import blt "lab.zaar.be/thefish/bearlibterminal"

type ColorHolder struct {
	R uint8
	G uint8
	B uint8
}

type TileColorSet struct {
	Fg     func() uint32
	Bg     func() uint32
	DarkFg func() uint32
	DarkBg func() uint32
	current *ColorHolder
}

type Appearance struct {
	Char  string
	ColorSet *TileColorSet
}

var crng = util.NewRNG()

func colordance(colorValue uint8, minGlow, maxGlow, step int) uint8 {
	color := crng.Range(0, step) + int(colorValue)
	if color > maxGlow {
		color = crng.Range(0, step) + minGlow
	}
	return uint8(color)
}

type Tile struct {
	*Appearance
	Name string
	Description string
	BlocksPass bool
	BlocksSight bool
	Explored bool
	MustDraw bool
}


func NewWall() *Tile {
	return &Tile{
		Name: "Wall",
		Description: "A dull rock wall",
		BlocksPass: true,
		BlocksSight: true,
		Explored: false,
		MustDraw: false,
		Appearance: &Appearance{
			Char: "#",
			ColorSet: &TileColorSet{
				Fg: func() uint32 {return blt.ColorFromARGB(255, 130,110,150)},
				Bg: func() uint32 {return blt.ColorFromARGB(255, 172,170,173)},
				DarkFg: func() uint32 {return blt.ColorFromARGB(255, 20,20,68)},
				DarkBg: func() uint32 {return blt.ColorFromARGB(255, 7,7,30)},
			},
		},
	}
}

func NewFloor() *Tile {
	return &Tile{
		Name: "Floor",
		Description: "Dusty rock floor",
		BlocksPass: false,
		BlocksSight: false,
		Explored: false,
		MustDraw: false,
		Appearance: &Appearance{
			Char: ".",
			ColorSet: &TileColorSet{
				Fg: func() uint32 {return blt.ColorFromARGB(255, 220,220,250)},
				Bg: func() uint32 {return blt.ColorFromARGB(255, 19,19,70)},
				DarkFg: func() uint32 {return blt.ColorFromARGB(255, 30,20,50)},
				DarkBg: func() uint32 {return blt.ColorFromARGB(255, 7,7,30)},
			},
		},
	}
}

func NewWaterTile() *Tile {
	ch := &ColorHolder{19,19,70}
	return &Tile {
		Name: "Water",
		Description: "Murky water",
		BlocksPass: false,
		BlocksSight: false,
		Explored: false,
		MustDraw: true, //fixme debug
		Appearance: &Appearance{
			Char: ".",
			ColorSet: &TileColorSet{
				current: ch,
				Fg: func() uint32 {return blt.ColorFromARGB(255, 220,220,250)},
				Bg: func() uint32 {
					return blt.ColorFromARGB(
						255,
						ch.R,
						colordance(ch.G, 2, 42, 4 ),
						colordance(ch.B, 180,229,12),
					)
				},
				DarkFg: func() uint32 {return blt.ColorFromARGB(255, 30,20,50)},
				DarkBg: func() uint32 {return blt.ColorFromARGB(255, 7,7,30)},
			},
		},
	}
}

func NewDeepWaterTile() *Tile {
	ch := &ColorHolder{5,2,154}
	return &Tile {
		Name: "Deep Water",
		Description: "Deep water",
		BlocksPass: false,
		BlocksSight: false,
		Explored: false,
		MustDraw: true, //fixme debug
		Appearance: &Appearance{
			Char: " ",
			ColorSet: &TileColorSet{
				current: ch,
				Fg: func() uint32 {return blt.ColorFromARGB(255, 220,220,250)},
				Bg: func() uint32 {
					return blt.ColorFromARGB(
						255,
						ch.R,
						colordance(ch.G, 0, 15, 2 ),
						colordance(ch.B, 120,180,5),
					)
				},
				DarkFg: func() uint32 {return blt.ColorFromARGB(255, 30,20,50)},
				DarkBg: func() uint32 {return blt.ColorFromARGB(255, 7,7,30)},
			},
		},
	}
}