import { Camera } from "../../libraries/Camera.js";
import { Point } from "../../libraries/spatial/Point.js";
import { TweenManager, Tween, Easing } from "../../libraries/Tween.js";
import { Board } from "../Board.js";
import { Global } from "../../libraries/Global.js";
import { Piece } from "../Piece.js";

export class GameState {
    constructor(fsm) {
        this.stateMachine = fsm;
        this.boundEvents = {};

        this.camera = new Camera(0, 0);
        this.tweenManager = new TweenManager()
        this.ballPosition = new Point(0,0);
        this.cameraTweenId = -1;
        this.frameFocus = 0;
        this.tileWidth = 64;

        this.boards = [];
        this.pieces = [];
    }

    init() {
        this.boundEvents['mousedown'] = this.mouseDown.bind(this);
        this.boundEvents['mousemove'] = this.mouseMove.bind(this);
        this.boundEvents['touchstart'] = this.touchStart.bind(this);
        this.boundEvents['touchmove'] = this.touchMove.bind(this);
        this.boundEvents['touchend'] = this.touchEnd.bind(this);
        this.boundEvents['mouseup'] = this.mouseUp.bind(this);
        this.boundEvents['resize'] = this.resize.bind(this);
        this.boundEvents['touch']
        for(let key in this.boundEvents) {
            window.addEventListener(key, this.boundEvents[key]);
        }

        this.boards = [];
        this.boards.push(new Board(this))
        this.boards.push(new Board(this))
        this.boards.push(new Board(this))

        this.pieces = [];
        this.pieces.push(new Piece(this, "L", 0, 0))
        this.pieces.push(new Piece(this, "S", 0, 0))
        this.pieces.push(new Piece(this, "U", 0, 0))
        this.resize()
    }

    draw(ctx) {
        this.camera.drawAtCamera(ctx, () => {
            for(let i = 0; i < this.boards.length; i++) {
                let board = this.boards[i];
                board.draw(ctx);
            }
        })


        let toolbarTop = Global.screenBounds.height / 2;
        let toolbarHeight = this.tileWidth * 6;

        ctx.save();
        ctx.translate(0, toolbarTop);

        ctx.fillStyle = "rgba(255, 255, 255, 0.5)";
        ctx.beginPath()
        ctx.rect(0, 0, Global.screenBounds.width, toolbarHeight)
        ctx.fill()

        ctx.fillStyle = "black";
        ctx.font = "24px Ariel"
        ctx.fillText("Toolbar", 0, 24)

        for(let i = 0; i < this.pieces.length; i++) {
            let piece = this.pieces[i];
            piece.draw(ctx);
        }
        
        ctx.restore();
        
        ctx.fillStyle = "rgba(40, 40, 220, 0.5)";
        ctx.beginPath()
        let navTop = toolbarTop + toolbarHeight;
        let navHeight =  Global.screenBounds.height - navTop;
        ctx.rect(0, navTop, Global.screenBounds.width, navHeight)
        ctx.fill()

        ctx.fillStyle = "black";
        ctx.font = "24px Ariel"
        ctx.fillText("Nav", 0, navTop + 24)
    }

    update(delta) {
        for(let i = 0; i < this.boards.length; i++) {
            let board = this.boards[i];
            board.update(delta);
        }

        for(let i = 0; i < this.pieces.length; i++) {
            let piece = this.pieces[i];
            piece.update(delta);
        }

        this.tweenManager.update();
    }

    mouseDown(event) {
        let mousePoint = new Point(event.clientX, event.clientY);
        
        if(mousePoint.y <= Global.screenBounds.center.y) {
            let direction = Math.sign(mousePoint.x - Global.screenBounds.center.x)
            this.frameFocus += direction

            this.frameFocus = Math.max(Math.min(this.boards.length - 1, this.frameFocus), 0)

            let tween = new Tween(this.camera.position, {x: this.boards[this.frameFocus].position.x}, 1000, Easing.Cubic.EaseOut);
            this.tweenManager.cancel(this.cameraTweenId)
            this.cameraTweenId = this.tweenManager.add(tween);
        }

        if(event.button == 0) {
            this.dragStartPoint = mousePoint;
            this.draggedPiece = null;
            mousePoint.y -= Global.screenBounds.height / 2;
            for(let i = 0; i < this.pieces.length; i++) {
                let piece = this.pieces[i];
                if(piece.pointWithin(mousePoint)) {
                    this.draggedPiece = piece;
                    break;
                }
            }
        }
    }
    
    touchStart(event) {
        let mousePoint = new Point(event.touches[0].clientX, event.touches[0].clientY);
        if(event.touches.length == 1) {
            this.dragStartPoint = mousePoint;
            this.draggedPiece = null;
            mousePoint.y -= Global.screenBounds.height / 2;
            for(let i = 0; i < this.pieces.length; i++) {
                let piece = this.pieces[i];
                if(piece.pointWithin(mousePoint)) {
                    this.draggedPiece = piece;
                    break;
                }
            }
        }
    }

    mouseMove(event) {
        document.body.style.cursor = "default";
        let mousePoint = new Point(event.clientX, event.clientY);

        if(this.draggedPiece && !this.dragStartPoint.equals(mousePoint)) {
            this.dragStarted = true;
            this.draggedPiece.position.x = mousePoint.x
            this.draggedPiece.position.y = mousePoint.y - Global.screenBounds.height / 2
        }
    }

    touchMove(event) {
        let mousePoint = new Point(event.touches[0].clientX, event.touches[0].clientY);

        if(this.draggedPiece && !this.dragStartPoint.equals(mousePoint)) {
            this.dragStarted = true;
            this.draggedPiece.position.x = mousePoint.x
            this.draggedPiece.position.y = mousePoint.y - Global.screenBounds.height / 2
        }
    }

    mouseUp(event) {
        if(this.dragStarted) {
            this.dragStarted = false;
            this.draggedPiece = null;
            return
        }
        this.dragStarted = false;
        this.draggedPiece = null;
        
        let mousePoint = new Point(event.clientX, event.clientY);
        mousePoint.y -= Global.screenBounds.height / 2;
        for(let i = 0; i < this.pieces.length; i++) {
            let piece = this.pieces[i];
            piece.mouseDown(event, mousePoint, this.tweenManager);
        }        

    }
    touchEnd(event) {
        if(this.dragStarted) {
            this.dragStarted = false;
            this.draggedPiece = null;
            return
        }
        this.dragStarted = false;
        this.draggedPiece = null;
        
        let mousePoint = new Point(event.clientX, event.clientY);
        mousePoint.y -= Global.screenBounds.height / 2;
        for(let i = 0; i < this.pieces.length; i++) {
            let piece = this.pieces[i];
            piece.mouseDown(event, mousePoint, this.tweenManager);
        }    
    }

    resize(event) {
        let possibleWidth = Math.min(64, Math.floor(Global.screenBounds.width / 11))
        let possibleHeight = Math.min(64, Math.floor((Global.screenBounds.height / 2) / 11))
        this.tileWidth = Math.min(possibleWidth, possibleHeight);

        for(let i = 0; i < this.boards.length; i++) {
            let board = this.boards[i];
            board.position.x = (14 * this.tileWidth) * i;
            if(board == this.boards[this.frameFocus]) {
                this.camera.position.x = board.position.x
            }
            
        }

        let toolbarHeight = this.tileWidth * 6;
        this.pieces[0].position.x = Global.screenBounds.width / 4
        this.pieces[0].position.y = toolbarHeight / 2

        this.pieces[1].position.x = Global.screenBounds.width / 2
        this.pieces[1].position.y = toolbarHeight / 2


        this.pieces[2].position.x = 3 /4 * Global.screenBounds.width
        this.pieces[2].position.y = toolbarHeight / 2
    }

    enter() {
        this.init(this.stateMachine.getState("game"));
    }

    leave() {
        this.board.destroy();
        for(let key in this.boundEvents) {
            window.removeEventListener(key, this.boundEvents[key]);
        }
    }
}