package gamemap

import (
	"container/ring"
	"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 NewColorComponentRing(colorValue uint8, minGlow, maxGlow, step int) *ring.Ring {
	q := make([]uint8, 0)
	color := int(colorValue)
	for color < maxGlow {
		q = append(q, uint8(color))
		color = crng.Range(0, step) + color
	}
	color = crng.Range(0, step + minGlow)
	for uint8(color) < colorValue {
		q = append(q, uint8(color))
		color = crng.Range(0, step + minGlow)
	}

	r := ring.New(len(q))
	for _, v := range q {
		r.Next().Value = v
	}

	return r
}


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
	Visible     bool
	Colordance  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
		Colordance:  true,

		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, 220, 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, 122}
	return &Tile{
		Name:        "Deep Water",
		Description: "Deep water",
		BlocksPass:  false,
		BlocksSight: false,
		Explored:    false,
		MustDraw:    true, //fixme debug
		Colordance:  true,
		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) },
			},
		},
	}
}