package d2gamescene

import (
	"image/color"

	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2resource"

	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2asset"
	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2gamestate"
	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2input"
	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2map"
	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2render"
	"github.com/OpenDiablo2/OpenDiablo2/d2core/d2ui"
	"github.com/OpenDiablo2/OpenDiablo2/d2game/d2player"
)

type Game struct {
	gameState     *d2gamestate.GameState
	pentSpinLeft  *d2ui.Sprite
	pentSpinRight *d2ui.Sprite
	testLabel     d2ui.Label
	mapEngine     *d2map.MapEngine
	hero          *d2map.Hero
	gameControls  *d2player.GameControls
}

func CreateGame(gameState *d2gamestate.GameState) *Game {
	return &Game{gameState: gameState}
}

func (v *Game) OnLoad() error {
	animation, _ := d2asset.LoadAnimation(d2resource.PentSpin, d2resource.PaletteSky)
	v.pentSpinLeft, _ = d2ui.LoadSprite(animation)
	v.pentSpinLeft.PlayBackward()
	v.pentSpinLeft.SetPlayLengthMs(475)
	v.pentSpinLeft.SetPosition(100, 300)

	animation, _ = d2asset.LoadAnimation(d2resource.PentSpin, d2resource.PaletteSky)
	v.pentSpinRight, _ = d2ui.LoadSprite(animation)
	v.pentSpinRight.PlayForward()
	v.pentSpinRight.SetPlayLengthMs(475)
	v.pentSpinRight.SetPosition(650, 300)

	v.testLabel = d2ui.CreateLabel(d2resource.Font42, d2resource.PaletteUnits)
	v.testLabel.Alignment = d2ui.LabelAlignCenter
	v.testLabel.SetText("Soon :tm:")
	v.testLabel.SetPosition(400, 250)

	v.mapEngine = d2map.CreateMapEngine(v.gameState)
	v.mapEngine.GenerateMap(d2enum.RegionAct1Town, 1, 0)

	startX, startY := v.mapEngine.GetStartPosition()
	v.hero = d2map.CreateHero(
		int(startX*5)+3,
		int(startY*5)+3,
		0,
		v.gameState.HeroType,
		v.gameState.Equipment,
	)
	v.mapEngine.AddEntity(v.hero)

	v.gameControls = d2player.NewGameControls(v.hero, v.mapEngine)
	v.gameControls.Load()
	d2input.BindHandler(v.gameControls)

	return nil
}

func (v *Game) OnUnload() error {
	d2input.UnbindHandler(v.gameControls)
	return nil
}

func (v *Game) Render(screen d2render.Surface) error {
	screen.Clear(color.Black)
	v.mapEngine.Render(screen)
	v.gameControls.Render(screen)
	return nil
}

func (v *Game) Advance(tickTime float64) error {
	v.mapEngine.Advance(tickTime)

	rx, ry := v.mapEngine.WorldToOrtho(v.hero.AnimatedComposite.LocationX/5, v.hero.AnimatedComposite.LocationY/5)
	v.mapEngine.MoveCameraTo(rx, ry)
	return nil
}