import * as PIXI from 'pixi.js';
import * as TWEEDLE from 'tweedle.js';
import {
    DEVICE_TYPE,
    DEVICE_Z_INDEX,
} from './constants';

import shelf from '/map/shelf.svg';
import charge from '/map/charge.svg';
import direction from '/map/direction.svg';

let app, mapContainer;

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

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

export function getApp() {
    return app;
}

export function getMapContainer() {
    return mapContainer;
}

export const getRealPosition = (x, y) => {
    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 generateSprite = (deviceType) => {
    let sprite;
    switch (deviceType) {
        case DEVICE_TYPE.SHELF:
            sprite = new PIXI.Sprite(PIXI.Texture.from(shelf, { resourceOptions: { scale: 5 } }));
            sprite.width = 50;
            sprite.height = 50;
            sprite.zIndex = DEVICE_Z_INDEX.SHELF;
            break;
        case DEVICE_TYPE.CHARGE:
            sprite = new PIXI.Sprite(PIXI.Texture.from(charge, { resourceOptions: { scale: 1 } }));
            sprite.width = 60;
            sprite.height = 60;
            sprite.zIndex = DEVICE_Z_INDEX.CHARGE;
            break;
        case DEVICE_TYPE.DIRECTION:
            sprite = new PIXI.Sprite(PIXI.Texture.from(direction, { resourceOptions: { scale: 5 } }));
            sprite.width = 112;
            sprite.height = 63;
            sprite.zIndex = DEVICE_Z_INDEX.DIRECTION;
            break;
        default:
            break;
    }
    return sprite;
}

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

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

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

export const beMovable = (sprite) => {
    sprite.off('pointerup');
    sprite.off('pointermove');
    sprite.off('pointerdown');
    sprite.off('click');

    sprite.on("pointerdown", onDragStart);

    let dragTarget;
    function onDragStart(event) {
        if (event.button === 0) {
            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) {
            this.parent.off('pointermove');
            this.parent.off('pointerup');
            dragTarget.alpha = 1;
            dragTarget = null;
        }
    }

}

export const spriteListBeMovable = (selectedSprites, endFn) => {
    if (selectedSprites && selectedSprites.length > 0) {
        let batchMove = false;
        let batchMoveStartPos = null;

        const batchMoving = (event) => {
            const scale = mapContainer.scale.x;
            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.batchMoveStartPos.x + mouseMovement.x;
                    sprite.position.y = sprite.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');

            if (endFn) {
                endFn();
            }
        }

        const batchMoveStart = (event) => {
            batchMoveStartPos = { x: event.data.global.clone().x, y: event.data.global.clone().y };
            selectedSprites.forEach(child => {
                child.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 generateID = () => {
    return Date.now().toString(36) + Math.random().toString(36).substring(2);
}

export const patchRaLayout = (param) => {
    const parentElement = document.getElementById('main-content');
    if (parentElement && parentElement.classList.contains('RaLayout-content')) {
        parentElement.style.paddingLeft = param;
        parentElement.style.paddingRight = param;
    }
}