package main

import (
	"github.com/surdeus/gox/src/gx"
	"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
	"github.com/hajimehoshi/ebiten/v2"
	"bytes"
	"log"
	"strings"
	"fmt"
	"math/rand"
)

type Player struct {
	*gx.Sprite
	MoveSpeed gx.Float
	ScaleSpeed gx.Float
}

type Debug struct{}

type Rect struct {
	*gx.DrawableRectangle
}

func NewRect() *Rect {
	return &Rect{&gx.DrawableRectangle{
			Rectangle: gx.Rectangle{
				Transform: gx.T(),
				W: 200,
				H: 400,
			},
			Color: gx.Color{
				gx.MaxColorV,
				0,
				0,
				gx.MaxColorV,
			},
			Visible: true,
			/*Shader: gx.SolidWhiteColorShader,
			Options: gx.ShaderOptions{
				Images: [4]*gx.Image{
					playerImg,
					nil,
					nil,
					nil,
				},
			},*/
	}}
}

func (r *Rect) Update(e *gx.Engine) error {
	return nil
}

var (
	playerImg *gx.Image
)

func NewPlayer() *Player {
	ret := &Player{
		Sprite: &gx.Sprite{
			Transform: gx.Transform {
				S: gx.Vector{5, 5},
				RA: gx.Vector{320, 240},
			},
			Visible: true,
			ShaderOptions: gx.ShaderOptions {
				Shader: gx.SolidWhiteColorShader,
				Uniforms: make(map[string] any),
			},
		},
		MoveSpeed: 90.,
		ScaleSpeed: .2,
	}
	
	ret.Images[0] = playerImg
	
	return ret
}

func (p *Player) Start(e *gx.Engine, v ...any) {
	fmt.Println("starting")
	c := e.Camera()
	c.RA = gx.V(360, -240)
}

func (p *Player) Update(e *gx.Engine) error {
	dt := e.DT()
	c := e.Camera()
	keys := e.Keys()
	
	p.Uniforms["Random"] = any(rand.Float32())
	for _, v := range keys {switch v {
	case ebiten.KeyArrowUp :
		c.P.Y += p.MoveSpeed * dt
	case ebiten.KeyArrowLeft :
		c.P.X -= p.MoveSpeed * dt
	case ebiten.KeyArrowDown :
		c.P.Y -= p.MoveSpeed * dt
	case ebiten.KeyArrowRight :
		c.P.X += p.MoveSpeed * dt
	case ebiten.KeyW :
		p.P.Y += p.MoveSpeed * dt
	case ebiten.KeyA :
		p.P.X -= p.MoveSpeed * dt
	case ebiten.KeyS :
		p.P.Y -= p.MoveSpeed * dt
	case ebiten.KeyD :
		p.P.X += p.MoveSpeed * dt
	case ebiten.KeyR :
		c.R += gx.Pi * p.ScaleSpeed * dt
	case ebiten.KeyT :
		c.R -= gx.Pi * p.ScaleSpeed * dt
	case ebiten.KeyF :
		if e.KeyIsPressed(ebiten.KeyShift) {
			c.S.X -= gx.Pi * p.ScaleSpeed * dt
		} else {
			c.S.X += gx.Pi * p.ScaleSpeed * dt
		}
	case ebiten.KeyG :
		if e.KeyIsPressed(ebiten.KeyShift) {
			c.S.Y -= gx.Pi * p.ScaleSpeed * dt
		} else {
			c.S.Y += gx.Pi * p.ScaleSpeed * dt
		}
	case ebiten.KeyZ :
		if e.KeyIsPressed(ebiten.KeyShift) {
			c.RA.X -= gx.Pi * p.MoveSpeed * dt
		} else {
			c.RA.X += gx.Pi * p.MoveSpeed * dt
		}
		log.Println(c.RA.X)
	case ebiten.KeyX :
		if e.KeyIsPressed(ebiten.KeyShift) {
			c.RA.Y -= gx.Pi * p.MoveSpeed * dt
		} else {
			c.RA.Y += gx.Pi * p.MoveSpeed * dt
		}
		log.Println(c.RA.Y)
	case ebiten.Key0 :
		e.Del(p)
	}}

	return nil
}

func (d *Debug) Draw(
	e *gx.Engine,
	i *gx.Image,
) {
	keyStrs := []string{}
	for _, k := range e.Keys() {
		keyStrs = append(keyStrs, k.String())
	}
	e.DebugPrint(i, strings.Join(keyStrs, ", "))
}

func (d *Debug) IsVisible() bool {return true}

func main() {
	e := gx.New(&gx.WindowConfig{
		Title: "Test title",
		Width: 720,
		Height: 480,
		VSync: true,
	})

	var err error
	playerImg, err = gx.LoadImage(bytes.NewReader(images.Runner_png))
	if err != nil {
		log.Fatal(err)
	}


	e.Add(0, NewPlayer())
	e.Add(1, &Debug{})
	e.Add(-1, NewRect())
	e.Run()
}