package gamemap

import (
	"container/ring"
	"lab.zaar.be/thefish/alchemyst-go/util"
)
import blt "lab.zaar.be/thefish/bearlibterminal"

type ColorHolder interface {
	GetColor() uint32
}

type DanceColorHolder struct {
	A uint8
	R *ring.Ring
	G *ring.Ring
	B *ring.Ring
}

func (chd *DanceColorHolder) GetColor() uint32 {
	return blt.ColorFromARGB(
		chd.A,
		chd.R.Next().Value.(uint8),
		chd.G.Next().Value.(uint8),
		chd.B.Next().Value.(uint8),
	)
}

type PlainColorHolder struct {
	A uint8
	R uint8
	G uint8
	B uint8
}

func (chb *PlainColorHolder) GetColor() uint32 {
	return blt.ColorFromARGB(
		chb.A,
		chb.R,
		chb.G,
		chb.B,
	)
}

type TileColorSet struct {
	Fg     ColorHolder
	Bg     ColorHolder
	DarkFg ColorHolder
	DarkBg ColorHolder
}

type Appearance struct {
	Char     string        `json:"char"`
	ColorSet *TileColorSet `json:"colorSet"`
}

var crng = util.NewRNG()

type Tile struct {
	*Appearance `json:"app"`
	Name        string `json:"name"`
	Description string `json:"desc"`
	BlocksPass  bool   `json:"blocksPass"`
	BlocksSight bool   `json:"blocksSight"`
	Colordance  bool   `json:"colordance"`
	Explored    bool
	MustDraw    bool
	Visible     bool
}

func singleColorRing(colorValue uint8) *ring.Ring {
	r := ring.New(1)
	r.Next().Value = colorValue
	return r
}

func fillColorRing(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(1, step) + color
	}
	color = crng.Range(0, step+minGlow)
	q = append(q, uint8(color))
	//for uint8(color) < uint8(colorValue) {
	//	q = append(q, uint8(color))
	//	color = crng.Range(1, 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)
}

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:     &PlainColorHolder{255, 130, 110, 150},
				Bg:     &PlainColorHolder{255, 172, 170, 173},
				DarkFg: &PlainColorHolder{255, 20, 20, 68},
				DarkBg: &PlainColorHolder{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:     &PlainColorHolder{255, 220, 220, 250},
				Bg:     &PlainColorHolder{255, 19, 19, 70},
				DarkFg: &PlainColorHolder{255, 30, 20, 50},
				DarkBg: &PlainColorHolder{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{
				Fg:      &PlainColorHolder{255, 220, 220, 250},
				Bg: &DanceColorHolder{
					255,
					singleColorRing(19),
					fillColorRing(19, 0, 15, 2),
					fillColorRing(70, 120, 220, 12),
				},
				//Bg: func() uint32 {
				//	return blt.ColorFromARGB(
				//		255,
				//		ch.R,
				//		colordance(ch.G, 0, 15, 2),
				//		colordance(ch.B, 120, 220, 12),
				//	)
				//},
				DarkFg: &PlainColorHolder{255, 30, 20, 50 },
				DarkBg: &PlainColorHolder{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
		Colordance:  true,
		Appearance: &Appearance{
			Char: " ",
			ColorSet: &TileColorSet{
				Fg:      &PlainColorHolder{255, 220, 220, 250},
				Bg: &DanceColorHolder{
					255,
					singleColorRing(5),
					fillColorRing(2,2,42,4),
					fillColorRing(154, 150, 229, 12),
				},
				//Bg: func() uint32 {
				//	return blt.ColorFromARGB(
				//		255,
				//		ch.R,
				//		colordance(ch.G, 2, 42, 4),
				//		colordance(ch.B, 180, 229, 12),
				//	)
				//},
				DarkFg: &PlainColorHolder{255, 30, 20, 50},
				DarkBg: &PlainColorHolder{255, 7, 7, 30},
			},
		},
	}
}

func (t *Tile) GetChar() string {
	return t.Char
}

func (t *Tile) GetRawColor() uint32 {
	if !t.Visible {
		return t.Appearance.ColorSet.Fg.GetColor()
	} else {
		return t.Appearance.ColorSet.DarkFg.GetColor()
	}
}

func (t *Tile) GetRawBgColor() uint32 {
	if !t.Visible {
		return t.Appearance.ColorSet.Bg.GetColor()
	} else {
		return t.Appearance.ColorSet.DarkBg.GetColor()
	}
}