package ui

import (
	"image/color"

	"opslag.de/schobers/zntg"
)

var defaultDimensions *Dimensions
var defaultFonts *Fonts
var defaultPalette *Palette
var defaultStyle *Style

type Dimensions struct {
	OutlineWidth   float32
	ScrollbarWidth float32
	TextPadding    float32
}

type FontNames struct {
	Default string
}

type Palette struct {
	// Background is the default background color.
	Background color.Color
	// Primary is used as a the main contrast color.
	Primary color.Color
	// PrimaryDark is a foreground version of the main contrast color.
	PrimaryDark color.Color
	// PrimaryHighlight is a light version of the main contrast color.
	PrimaryHighlight color.Color
	// PrimaryLight is a background version of the main contrast color.
	PrimaryLight color.Color
	// ShadedBackground is a darker version of the background color.
	ShadedBackground color.Color
	// Text is the default text color.
	Text color.Color
	// TextDisabled is disabled text color.
	TextDisabled color.Color
	// TextNegative is the text color associated with a negative event.
	TextNegative color.Color
	// TextOnPrimary is the text color when used with the main contrast color as background.
	TextOnPrimary color.Color
	// TextPositive is the text color associated with a positive event.
	TextPositive color.Color
}

type Style struct {
	Dimensions *Dimensions
	Fonts      *FontNames
	Palette    *Palette
}

func DefaultDimensions() *Dimensions {
	return &Dimensions{
		OutlineWidth:   2.,
		ScrollbarWidth: 16.,
		TextPadding:    8.,
	}
}

func DefaultFontNames() *FontNames {
	return &FontNames{
		Default: "default",
	}
}

func DefaultPalette() *Palette {
	return &Palette{
		Background:       color.White,
		Primary:          zntg.MustHexColor(`#3F51B5`),
		PrimaryDark:      zntg.MustHexColor(`#002884`),
		PrimaryHighlight: zntg.MustHexColor(`#E8EAF6`),
		PrimaryLight:     zntg.MustHexColor(`#757CE8`),
		ShadedBackground: zntg.MustHexColor(`#FAFAFA`),
		Text:             color.Black,
		TextDisabled:     zntg.MustHexColor(`#BDBDBD`),
		TextNegative:     zntg.MustHexColor(`#FF4336`),
		TextOnPrimary:    color.White,
		TextPositive:     zntg.MustHexColor(`#4CAF50`),
	}
}

func DefaultStyle() *Style {
	return &Style{
		Dimensions: DefaultDimensions(),
		Fonts:      DefaultFontNames(),
		Palette:    DefaultPalette(),
	}
}