package main

import (
	"flag"
	"image"
	"image/color"
	_ "image/png"
	"log"
	"os"
	"runtime"

	"drjosh.dev/gurgle/engine"
	"drjosh.dev/gurgle/game"
	"github.com/hajimehoshi/ebiten/v2"
)

var rewriteLevel1 = flag.Bool("rewrite_level_1", false, "Rewrites level1.gobz from an inbuilt struct literal")

func main() {
	flag.Parse()

	ebiten.SetWindowResizable(true)
	ebiten.SetWindowSize(640, 480)
	ebiten.SetWindowTitle("TODO")

	if *rewriteLevel1 {
		writeLevel1()
	}

	g := &engine.Game{
		ScreenHeight: 240,
		ScreenWidth:  320,
		Root: &engine.Scene{
			ID: "root",
			Components: []interface{}{
				&engine.Camera{
					ID:    "game_camera",
					Scene: &engine.SceneRef{Path: "assets/level1.gobz"},
				},
				&engine.DebugToast{ID: "toast"},
				engine.PerfDisplay{},
			},
		},
	}
	if err := g.LoadAndPrepare(game.Assets); err != nil {
		log.Fatalf("Loading/preparing error: %v", err)
	}

	if runtime.GOOS != "js" {
		// Run a repl on the console.
		go g.REPL(os.Stdin, os.Stdout, game.Assets)
	}

	// ... while the game also runs
	if err := ebiten.RunGame(g); err != nil {
		log.Fatalf("Game error: %v", err)
	}
}

// writeLevel1 dumps a test level into level1.gobz
func writeLevel1() {
	redTileAnim := &engine.Anim{Frames: []engine.AnimFrame{
		{Frame: 3, Duration: 12},
		{Frame: 4, Duration: 12},
		{Frame: 5, Duration: 12},
		{Frame: 6, Duration: 12},
	}}
	greenTileAnim := &engine.Anim{Frames: []engine.AnimFrame{
		{Frame: 0, Duration: 16},
		{Frame: 1, Duration: 16},
		{Frame: 2, Duration: 16},
	}}
	denseTiles := [][]engine.Tile{
		{engine.StaticTile(9), nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.StaticTile(9)},
		{nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.AnimatedTile{Animer: redTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.AnimatedTile{Animer: redTileAnim.Copy()}, nil, nil, nil},
		{nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, engine.AnimatedTile{Animer: greenTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, nil, engine.AnimatedTile{Animer: redTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.AnimatedTile{Animer: greenTileAnim.Copy()}, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, engine.AnimatedTile{Animer: greenTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.AnimatedTile{Animer: greenTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, engine.AnimatedTile{Animer: redTileAnim.Copy()}, nil, nil, nil, nil, nil, nil, engine.StaticTile(9), nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{nil, nil, nil, nil, nil, engine.StaticTile(9), nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, engine.StaticTile(9), nil, nil, nil},
		{nil, nil, nil, nil, engine.StaticTile(9), engine.StaticTile(9), engine.StaticTile(9), nil, nil, nil, engine.StaticTile(9), nil, nil, nil, nil, nil, nil, nil, nil, nil},
		{engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.AnimatedTile{Animer: redTileAnim.Copy()}, engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8), engine.StaticTile(8)},
		{engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.AnimatedTile{Animer: redTileAnim.Copy()}, engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.AnimatedTile{Animer: greenTileAnim.Copy()}, engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7)},
		{engine.StaticTile(9), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(7), engine.StaticTile(9)},
	}
	tiles := make(map[image.Point]engine.Tile)
	for j, row := range denseTiles {
		for i, tile := range row {
			if tile == nil {
				continue
			}
			tiles[image.Pt(i, j)] = tile
		}
	}

	level1 := &engine.Scene{
		ID:     "level_1",
		Bounds: engine.Bounds(image.Rect(-32, -32, 320+32, 240+32)),
		Components: []interface{}{
			&engine.Fill{
				Color:  color.Gray{100},
				ZOrder: 0,
			},
			&engine.Billboard{
				ID:       "bg_image",
				Parallax: 0.5,
				ZOrder:   1,
				Pos:      image.Pt(-160, -120),
				Src:      engine.ImageRef{Path: "assets/space.png"},
			},
			&engine.Tilemap{
				ID:     "terrain",
				ZOrder: 2,
				Map:    tiles,
				Sheet: engine.Sheet{
					CellSize: image.Pt(16, 16),
					Src:      engine.ImageRef{Path: "assets/boxes.png"},
				},
			},
			&engine.SolidRect{
				ID:     "ceiling",
				Bounds: engine.Bounds(image.Rect(0, -1, 320, 0)),
			},
			&engine.SolidRect{
				ID:     "left_wall",
				Bounds: engine.Bounds(image.Rect(-1, 0, 0, 240)),
			},
			&engine.SolidRect{
				ID:     "right_wall",
				Bounds: engine.Bounds(image.Rect(320, 0, 321, 240)),
			},
			&game.Awakeman{
				CameraID: "game_camera",
				ToastID:  "toast",
				Sprite: engine.Sprite{
					Actor: engine.Actor{
						CollisionDomain: "level_1",
						Pos:             image.Pt(100, 100),
						Size:            image.Pt(8, 16),
					},
					ZOrder:      3,
					FrameOffset: image.Pt(-1, 0),
					Sheet: engine.Sheet{
						CellSize: image.Pt(10, 16),
						Src:      engine.ImageRef{Path: "assets/aw.png"},
					},
				},
			},
		},
	}

	if err := engine.SaveGobz(level1, "game/assets/level1.gobz"); err != nil {
		log.Fatalf("Couldn't save level1.gobz: %v", err)
	}
}