package main

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

type ColorOption struct {
	Name  string
	Color rl.Color
}

type ThemeOption struct {
	Name string
}

type LayoutOption struct {
	Name string
}

func drawRoundedRect(r rl.Rectangle, roundness float32, col rl.Color) {
	segments := int32(8)
	rl.DrawRectangleRounded(r, roundness, segments, col)
}

func drawRoundedRectButton(r rl.Rectangle, text string, alpha float32, hovered bool) {
	r.X += 0.5
	r.Y += 0.5
	r.Width -= 1.0
	r.Height -= 1.0

	col := applyAlpha(rl.White, 0.1)
	if hovered {
		col = applyAlpha(rl.White, 0.3)
	}
	lineCol := applyAlpha(rl.White, 1.0)
	textCol := applyAlpha(rl.RayWhite, alpha)

	roundness := float32(0.3)
	rl.DrawRectangleRounded(r, roundness, 8, col)
	rl.DrawRectangleRoundedLines(r, roundness, 8, lineCol)

	txW := rl.MeasureText(text, 20)
	rl.DrawText(text, int32(r.X+(r.Width-float32(txW))/2),
		int32(r.Y+(r.Height-20)/2), 20, textCol)
}

func drawRectButtonAlpha(r rl.Rectangle, text string, alpha float32) {
	hovered := overRect(rl.GetMousePosition(), r)
	drawRoundedRectButton(r, text, alpha, hovered)
}

func drawButton(text string, x, y, w, h int32, mousePos rl.Vector2) {
	r := rl.Rectangle{X: float32(x), Y: float32(y), Width: float32(w), Height: float32(h)}
	hovered := overRect(mousePos, r)
	drawRoundedRectButton(r, text, 1.0, hovered)
}

func drawColorCircleAlpha(x, y float32, col rl.Color, selected bool, alpha float32) {
	baseCol := applyAlpha(col, alpha)
	darkCol := applyAlpha(rl.Color{
		R: uint8(float32(col.R) * 0.8),
		G: uint8(float32(col.G) * 0.8),
		B: uint8(float32(col.B) * 0.8),
		A: col.A,
	}, alpha)
	rl.DrawCircleGradient(int32(x), int32(y), 8, baseCol, darkCol)
	if selected {
		rl.DrawCircleLines(int32(x), int32(y), 8, applyAlpha(rl.White, alpha))
	} else if overCircle(rl.GetMousePosition(), rl.Vector2{X: x, Y: y}, 8) {
		rl.DrawCircleLines(int32(x), int32(y), 8, applyAlpha(rl.Fade(rl.White, 0.5), alpha))
	}
}

func drawThemeBoxAlpha(x, y float32, label string, selected bool, alpha float32) {
	rect := rl.Rectangle{X: x - 50, Y: y - 20, Width: 100, Height: 40}
	hovered := overRect(rl.GetMousePosition(), rect)

	col := applyAlpha(rl.White, 0.1*alpha)
	if hovered {
		col = applyAlpha(rl.White, 0.3*alpha)
	}
	lineCol := applyAlpha(rl.White, alpha)
	textCol := applyAlpha(rl.RayWhite, alpha)

	drawRoundedRect(rect, 0.3, col)
	rl.DrawRectangleRoundedLines(rect, 0.3, 8, lineCol)

	txW := rl.MeasureText(label, 20)
	rl.DrawTextEx(rl.GetFontDefault(), label,
		rl.Vector2{X: float32(int32(x) - txW/2), Y: float32(int32(y) - 10)}, 20, 1, textCol)
	if selected {
		rl.DrawRectangleRoundedLines(rect, 0.3, 8, lineCol)
	}
}

func drawLayoutOptionAlpha(x, y float32, label string, selected bool, alpha float32) {
	rect := rl.Rectangle{X: x - 60, Y: y - 20, Width: 120, Height: 40}
	hovered := overRect(rl.GetMousePosition(), rect)
	col := applyAlpha(rl.White, 0.1*alpha)
	if hovered {
		col = applyAlpha(rl.White, 0.3*alpha)
	}
	lineCol := applyAlpha(rl.White, alpha)
	textCol := applyAlpha(rl.RayWhite, alpha)

	drawRoundedRect(rect, 0.3, col)
	rl.DrawRectangleRoundedLines(rect, 0.3, 8, lineCol)

	txW := rl.MeasureText(label, 20)
	rl.DrawTextEx(rl.GetFontDefault(), label,
		rl.Vector2{X: float32(int32(x) - txW/2), Y: float32(int32(y) - 10)}, 20, 1, textCol)
	if selected {
		rl.DrawRectangleRoundedLines(rect, 0.3, 8, lineCol)
	}
}

func applyAlpha(c rl.Color, alpha float32) rl.Color {
	c.A = uint8(float32(c.A) * alpha)
	return c
}