package ui

import rl "github.com/gen2brain/raylib-go/raylib"

var defaultLabelPadding float32 = 5
var defaultLabelRoundness float32 = 0.2

// If the text formation formula is applied without it the text is
// overlowing on the right due to rounding errors
const overflowMultiplyer float32 = 1.1

var defaultLabelStyle = &Style{
	BacgroundColor: &rl.LightGray,
	FontColor:      &rl.DarkGray,
	Padding:        &defaultLabelPadding,
	Roundness: 		&defaultLabelRoundness ,
}

type Label struct {
	WidthWeight float32
	Text        string

	Style Style
}

func (base *Label) Init(*Menu) {
	base.Style.FillMissing(defaultLabelStyle)
	if base.WidthWeight == 0 {
		base.WidthWeight = 1
	}
}

func (base *Label) Destroy() {
}

func (base *Label) Draw(position *rl.Rectangle) {
	// rl.TraceLog(rl.LogInfo, "Drawn at %v/%v/%v/%v", position.X, position.Y, position.Width, position.Height)
	rl.DrawRectangleRounded(*position,
		*base.Style.Roundness, 
		0, // Assume the segments param is always 0 - it doesn't really matter without a border
		*base.Style.BacgroundColor)
	rl.DrawText(base.Text,
		int32(position.X+*base.Style.Padding),
		int32(position.Y+*base.Style.Padding),
		base.getTextHeight(position),
		*base.Style.FontColor)
}

func (base *Label) GetOccupationWeight() float32 {
	return base.WidthWeight
}

// Returns the size of the text that will not overflow in the side
func (base *Label) getTextHeight(position *rl.Rectangle) int32 {
	var width = position.Width - 2 * *base.Style.Padding
	var outp = position.Height - 2 * *base.Style.Padding
	var maxWidthSize = rl.MeasureText(base.Text, int32(outp))
	if maxWidthSize > int32(width) {
		outp /= (float32(maxWidthSize) / width) * overflowMultiplyer
	}
	return int32(outp)
}