game.go

package kar

import (
	"reflect"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/colorm"
	"github.com/hajimehoshi/ebiten/v2/inpututil"
)

type Game struct {
	Spawn      Spawn
	Platform   Platform
	Enemy      Enemy
	Player     Player
	Item       Item
	Effects    Effects
	Camera     Camera
	Ui         UI
	MainMenu   MainMenu
	Menu       Menu
	Debug      Debug
	Projectile Projectile
}

func (g *Game) Init() {
	v := reflect.ValueOf(g).Elem()
	for i := range v.NumField() {
		if init := v.Field(i).Addr().MethodByName("Init"); init.IsValid() {
			init.Call(nil)
		}
	}
	colorM.ChangeHSV(1, 0, 0.5) // BW
	textDO.ColorScale.Scale(0.5, 0.5, 0.5, 1)
}

func (g *Game) Update() error {
	if ebiten.IsFocused() {

		if inpututil.IsKeyJustPressed(ebiten.KeyP) {
			if ebiten.IsKeyPressed(ebiten.KeyMeta) && ebiten.IsKeyPressed(ebiten.KeyShift) {
				debugEnabled = !debugEnabled
			}
		}

		// toggle menu
		if inpututil.IsKeyJustPressed(ebiten.KeyEnter) {
			switch currentGameState {
			case "menu":
				currentGameState = "playing"
				// previousGameState = "menu"
				colorM = colorm.ColorM{}
				textDO.ColorScale.Reset()
			case "playing":
				currentGameState = "menu"
				// previousGameState = "playing"
				colorM.ChangeHSV(1, 0, 0.5) // BW
				textDO.ColorScale.Scale(0.5, 0.5, 0.5, 1)
			}
		}

		// Update systems
		switch currentGameState {
		case "mainmenu":
			g.MainMenu.Update()
		case "menu":
			g.Menu.Update()
		case "playing":
			g.Camera.Update()
			g.Enemy.Update()
			g.Player.Update()
			g.Platform.Update()
			g.Item.Update()
			g.Effects.Update()
			g.Ui.Update()
			g.Projectile.Update()
			g.Spawn.Update()
		}
		if debugEnabled {
			g.Debug.Update()
		}
	}
	return nil
}

func (g *Game) Draw(screen *ebiten.Image) {
	if ebiten.IsFocused() {
		Screen = screen
		Screen.Fill(backgroundColor)

		// Update systems
		switch currentGameState {
		case "mainmenu":
			g.MainMenu.Draw()
		case "menu":
			g.Camera.Draw()
			g.Menu.Draw()
		case "playing":
			g.Camera.Draw()
			g.Platform.Draw()
			g.Enemy.Draw()
			g.Player.Draw()
			g.Item.Draw()
			g.Projectile.Draw()
			g.Effects.Draw()
			g.Ui.Draw()
		}
		if debugEnabled {
			g.Debug.Draw()
		}
	}
}

func (g *Game) LayoutF(w, h float64) (float64, float64) {
	return ScreenSize.X, ScreenSize.Y
}

func (g *Game) Layout(w, h int) (int, int) {
	return 0, 0
}