package defaultTheme

import "bytes"
import "image"
import _ "embed"
import _ "image/png"
import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/data"
import "git.tebibyte.media/tomo/tomo/theme"
import "git.tebibyte.media/tomo/tomo/canvas"

//go:embed assets/icons-small.png
var atlasSmallBytes []byte
//go:embed assets/icons-large.png
var atlasLargeBytes []byte

func generateSource (data []byte, width int) map[theme.Icon] canvas.Texture {
	atlasImage, _, err := image.Decode(bytes.NewReader(data))
	if err != nil { panic(err) }
	atlasTexture := tomo.NewTexture(atlasImage)

	source := make(map[theme.Icon] canvas.Texture)
	x := 0
	y := 0
	
	row := func () {
		x = 0
		y ++
	}
	col := func (id theme.Icon) {
		source[id] = atlasTexture.Clip(image.Rect (
			x * width,
			y * width,
			(x + 1) * width,
			(y + 1) * width))
		x++
	}

	// objects
	col(theme.IconUnknown)
	col(theme.IconFile)
	col(theme.IconDirectory)
	col(theme.IconStorage)
	col(theme.IconApplication)
	col(theme.IconNetwork)
	col(theme.IconDevice)
	col(theme.IconPeripheral)
	col(theme.IconPort)

	// actions: files
	row()
	col(theme.IconActionOpen)
	col(theme.IconActionOpenIn)
	col(theme.IconActionSave)
	col(theme.IconActionSaveAs)
	col(theme.IconActionPrint)
	col(theme.IconActionNew)
	col(theme.IconActionNewDirectory)
	col(theme.IconActionDelete)
	col(theme.IconActionRename)
	col(theme.IconActionGetInformation)
	col(theme.IconActionChangePermissions)
	col(theme.IconActionRevert)

	// actions: list management
	row()
	col(theme.IconActionAdd)
	col(theme.IconActionRemove)
	col(theme.IconActionAddBookmark)
	col(theme.IconActionRemoveBookmark)
	col(theme.IconActionAddFavorite)
	col(theme.IconActionRemoveFavorite)

	// actions: media
	row()
	col(theme.IconActionPlay)
	col(theme.IconActionPause)
	col(theme.IconActionStop)
	col(theme.IconActionFastForward)
	col(theme.IconActionRewind)
	col(theme.IconActionToBeginning)
	col(theme.IconActionToEnd)
	col(theme.IconActionRecord)
	col(theme.IconActionVolumeUp)
	col(theme.IconActionVolumeDown)
	col(theme.IconActionMute)

	// actions: editing
	row()
	col(theme.IconActionUndo)
	col(theme.IconActionRedo)
	col(theme.IconActionCut)
	col(theme.IconActionCopy)
	col(theme.IconActionPaste)
	col(theme.IconActionFind)
	col(theme.IconActionReplace)
	col(theme.IconActionSelectAll)
	col(theme.IconActionSelectNone)
	col(theme.IconActionIncrement)
	col(theme.IconActionDecrement)
	
	// actions: window management
	row()
	col(theme.IconActionClose)
	col(theme.IconActionQuit)
	col(theme.IconActionIconify)
	col(theme.IconActionShade)
	col(theme.IconActionMaximize)
	col(theme.IconActionFullScreen)
	col(theme.IconActionRestore)

	// actions: view
	row()
	col(theme.IconActionExpand)
	col(theme.IconActionContract)
	col(theme.IconActionBack)
	col(theme.IconActionForward)
	col(theme.IconActionUp)
	col(theme.IconActionDown)
	col(theme.IconActionReload)
	col(theme.IconActionZoomIn)
	col(theme.IconActionZoomOut)
	col(theme.IconActionZoomReset)
	col(theme.IconActionMove)
	col(theme.IconActionResize)
	col(theme.IconActionGoTo)

	// actions: tools
	row()
	col(theme.IconActionTransform)
	col(theme.IconActionTranslate)
	col(theme.IconActionRotate)
	col(theme.IconActionScale)
	col(theme.IconActionWarp)
	col(theme.IconActionCornerPin)
	col(theme.IconActionSelectRectangle)
	col(theme.IconActionSelectEllipse)
	col(theme.IconActionSelectLasso)
	col(theme.IconActionSelectGeometric)
	col(theme.IconActionSelectAuto)
	col(theme.IconActionCrop)
	col(theme.IconActionFill)
	row()
	col(theme.IconActionGradient)
	col(theme.IconActionPencil)
	col(theme.IconActionBrush)
	col(theme.IconActionEraser)
	col(theme.IconActionText)
	col(theme.IconActionEyedropper)

	// status: dialog
	row()
	col(theme.IconStatusInformation)
	col(theme.IconStatusQuestion)
	col(theme.IconStatusWarning)
	col(theme.IconStatusError)
	col(theme.IconStatusCancel)
	col(theme.IconStatusOkay)

	// status: network
	row()
	col(theme.IconStatusCellSignal0)
	col(theme.IconStatusCellSignal1)
	col(theme.IconStatusCellSignal2)
	col(theme.IconStatusCellSignal3)
	col(theme.IconStatusWirelessSignal0)
	col(theme.IconStatusWirelessSignal1)
	col(theme.IconStatusWirelessSignal2)
	col(theme.IconStatusWirelessSignal3)

	// status: power
	row()
	col(theme.IconStatusBattery0)
	col(theme.IconStatusBattery1)
	col(theme.IconStatusBattery2)
	col(theme.IconStatusBattery3)
	col(theme.IconStatusBrightness0)
	col(theme.IconStatusBrightness1)
	col(theme.IconStatusBrightness2)
	col(theme.IconStatusBrightness3)

	// status: media
	row()
	col(theme.IconStatusVolume0)
	col(theme.IconStatusVolume1)
	col(theme.IconStatusVolume2)
	col(theme.IconStatusVolume3)

	return source
}

type iconTheme struct {
	texturesSmall map[theme.Icon] canvas.Texture
	texturesLarge map[theme.Icon] canvas.Texture
}

func (this *iconTheme) ensure () {
	if this.texturesSmall != nil { return }
	this.texturesSmall = generateSource(atlasSmallBytes, 16)
	this.texturesLarge = generateSource(atlasLargeBytes, 32)
}

func (this *iconTheme) selectSource (size theme.IconSize) map[theme.Icon] canvas.Texture {
	if size == theme.IconSizeSmall {
		return this.texturesSmall
	} else {
		return this.texturesLarge
	}
}

func (this *iconTheme) Icon (icon theme.Icon, size theme.IconSize) canvas.Texture {
	this.ensure()
	source := this.selectSource(size)
	if texture, ok := source[icon]; ok {
		return texture
	}
	return source[theme.IconUnknown]
}

func (this *iconTheme) MimeIcon (mime data.Mime, size theme.IconSize) canvas.Texture {
	this.ensure()
	source := this.selectSource(size)
	if mime == data.M("inode", "directory") {
		return source[theme.IconDirectory]
	} else {
		return source[theme.IconFile]
	}
}