import * as PIXI from 'pixi.js';

let app = null;
let mapContainer = null;
let effectTick, effectHalfCircle, effectRectangle;

export function syncApp(param) {
    app = param;
}

export function syncMapContainer(param) {
    mapContainer = param;
}

export function getMapContainer() {
    return mapContainer;
}

export const MapEvent = Object.freeze({
    SELECTION_BOX: Symbol.for(0),
})

export const SENSOR_TYPE = Object.freeze({
    AGV: "AGV",
    SHELF: "SHELF",
})

export const getRealPosition = (x, y, mapContainer) => {
    const rect = app.view.getBoundingClientRect();
    return {
        mapX: (x - rect.left) / mapContainer.scale.x - mapContainer.x / mapContainer.scale.x,
        mapY: (y - rect.top) / mapContainer.scale.y - mapContainer.y / mapContainer.scale.y
    }
}

export const initSprite = (sprite, type) => {
    sprite.anchor.set(0.5);
    sprite.cursor = 'pointer';
    sprite.eventMode = 'static';
    sprite.data = {
        type: type,
        uuid: generateID()
    };
}

// sprite be movable from sprite click event
export const beMovable = (sprite, setDidClickSprite) => {
    sprite.off('pointerup');
    sprite.off('pointermove');
    sprite.off('pointerdown');
    sprite.off('click');

    sprite.on("pointerdown", onDragStart);

    let dragTarget;
    function onDragStart(event) {
        setDidClickSprite(true);
        dragTarget = event.currentTarget;
        mapContainer.parent.off('pointermove');
        mapContainer.parent.on('pointermove', onDragMove, dragTarget);

        mapContainer.parent.off('pointerup');
        mapContainer.parent.on('pointerup', onDragEnd.bind(mapContainer));
    }

    function onDragMove(event) {
        if (this) {
            this.parent.toLocal(event.global, null, this.position);
        }
    }

    function onDragEnd() {
        if (dragTarget) {
            setDidClickSprite(false);
            this.parent.off('pointermove');
            this.parent.off('pointerup');
            dragTarget.alpha = 1;
            dragTarget = null;
        }
    }

}

// sprite be beSettings from sprite click event
export const beSettings = (sprite, setSpriteBySettings, setDidClickSprite) => {
    sprite.off('pointerup');
    sprite.off('pointermove');
    sprite.off('pointerdown');
    sprite.off('click');

    sprite.on("click", onClick);

    function onClick(event) {
        setSpriteBySettings(sprite);
        // setDidClickSprite(true);
    }
}

// sprites be movable from select box
// the scale was dynamic
export const spriteListBeMovable = (selectedSprites, scale, resetFn) => {
    if (selectedSprites && selectedSprites.length > 0) {
        let batchMove = false;
        let batchMoveStartPos = null;

        const batchMoving = (event) => {
            if (batchMove && batchMoveStartPos) {
                // offset move val
                var mouseMovement = {
                    x: (event.global.x - batchMoveStartPos.x) / scale,
                    y: (event.global.y - batchMoveStartPos.y) / scale
                };
                for (let sprite of selectedSprites) {
                    sprite.position.x = sprite.data.batchMoveStartPos.x + mouseMovement.x;
                    sprite.position.y = sprite.data.batchMoveStartPos.y + mouseMovement.y;
                }
            }
        }

        const batchMoveEnd = (event) => {
            batchMove = false;
            batchMoveStartPos = null;
            selectedSprites.forEach(child => {
                unMarkSprite(child);
            })
            selectedSprites = [];
            mapContainer.parent.off('mousedown');
            mapContainer.parent.off('mousemove');
            mapContainer.parent.off('mouseup');

            resetFn();
        }

        const batchMoveStart = (event) => {
            batchMoveStartPos = { x: event.data.global.clone().x, y: event.data.global.clone().y };
            selectedSprites.forEach(child => {
                child.data.batchMoveStartPos = { x: child.position.x, y: child.position.y };
            })

            batchMove = true;
            mapContainer.parent.off('mousemove');
            mapContainer.parent.on('mousemove', batchMoving);

            mapContainer.parent.off('mouseup');
            mapContainer.parent.on('mouseup', batchMoveEnd);
        }

        mapContainer.parent.off('mousedown')
        mapContainer.parent.on('mousedown', batchMoveStart);
    }
}

export const isSpriteInSelectionBox = (sprite, selectionBox) => {
    const spriteBounds = sprite.getBounds();
    const boxBounds = selectionBox.getBounds();

    return spriteBounds.x + spriteBounds.width > boxBounds.x
        && spriteBounds.x < boxBounds.x + boxBounds.width
        && spriteBounds.y + spriteBounds.height > boxBounds.y
        && spriteBounds.y < boxBounds.y + boxBounds.height;
}

export const showSelectedEffect = (sprite) => {
    const { width, height } = sprite;
    const scale = sprite.scale.x;
    const sideLen = (Math.max(width, height) + 10) * scale;
    const color = 0x273c75;

    effectHalfCircle = new PIXI.Graphics();
    effectHalfCircle.beginFill(color);
    effectHalfCircle.lineStyle(2 * scale, color);
    effectHalfCircle.arc(0, 0, sideLen, 0, Math.PI);
    effectHalfCircle.endFill();
    effectHalfCircle.position.set(sprite.x, sprite.y);
    effectHalfCircle.scale.set(1 / scale);

    effectRectangle = new PIXI.Graphics();
    effectRectangle.lineStyle(2 * scale, color, 1);
    effectRectangle.drawRoundedRect(0, 0, sideLen, sideLen, 16 * scale);
    effectRectangle.endFill();
    effectRectangle.mask = effectHalfCircle;

    const scaledWidth = sideLen * (1 / scale);
    const scaledHeight = sideLen * (1 / scale);

    effectRectangle.scale.set(1 / scale);
    effectRectangle.position.set(sprite.x - scaledWidth / 2, sprite.y - scaledHeight / 2);

    mapContainer.addChild(effectRectangle);
    mapContainer.addChild(effectHalfCircle);

    let phase = 0;
    effectTick = (delta) => {
        phase += delta / 10;
        phase %= (Math.PI * 2);
        if (effectHalfCircle) {
            effectHalfCircle.rotation = phase;
        }
    };

    app.ticker.add(effectTick);
}

export const removeSelectedEffect = () => {
    if (effectTick) {
        app.ticker.remove(effectTick);
    }
    if (effectHalfCircle) {
        mapContainer.removeChild(effectHalfCircle);
        effectHalfCircle = null;
    }
    if (effectRectangle) {
        mapContainer.removeChild(effectRectangle);
        effectRectangle = null;
    }
}

export const copySprite = (sprite) => {
    const copiedSprite = new PIXI.Sprite(sprite.texture);
    initSprite(copiedSprite);
    copiedSprite.position.set(sprite.position.x, sprite.position.y);
    copiedSprite.scale.set(sprite.scale.x, sprite.scale.y);
    copiedSprite.rotation = sprite.rotation;
    copiedSprite.data = deepCopy(sprite.data);
    copiedSprite.data.uuid = generateID();
    return copiedSprite;
}

export const markSprite = (sprite) => {
    sprite.alpha = 0.5;
}

export const unMarkSprite = (sprite) => {
    sprite.alpha = 1;
}

export const generateID = () => {
    return Date.now().toString(36) + Math.random().toString(36).substring(2);
}

export const deepCopy = (data) => {
    return JSON.parse(JSON.stringify(data));
}

export const pureNumStr = (param) => {
    if (param) {
        return Number(param);
    } else {
        return '';
    }
}