import { Component, EventTouch, Node, Prefab, UIOpacity, UITransform, Vec3, Widget, _decorator, easing, instantiate, tween, v3 } from 'cc';
const { ccclass, requireComponent } = _decorator;

@ccclass('RewardFly')
@requireComponent(UITransform)
export class RewardFly extends Component {
    protected onLoad() {
        //this.node.on(Node.EventType.TOUCH_START, function (event: EventTouch) {
            //event.propagationStopped = true;
            //event.preventSwallow = true;
        //}, this, true);
    }

    protected onDisable() {
        this.node.destroyAllChildren();
    }

    private convertToNodeSpaceAR(target: Node | Vec3) {
        if (target instanceof Node) {
            return this.node.getComponent(UITransform).convertToNodeSpaceAR(target.getComponent(UITransform).convertToWorldSpaceAR(Vec3.ZERO));
        }
        return this.node.getComponent(UITransform).convertToNodeSpaceAR(target);
    }

    public add(opts: {
        /**物品 */
        item: Prefab | Node,
        /**物品数量 */
        count: number,
        /**起始位置(节点或世界坐标) */
        start: Node | Vec3,
        /**终点位置(节点或世界坐标) */
        end: Node | Vec3,
        /**起点炸开的范围[x, y], 默认[100, 100] */
        startRange?: [number, number],
        /**终点偏移的范围[x, y], 默认[0, 0] */
        endOffset?: [number, number],
        /**开始接触 */
        onBegin?: (nodeCopy: Node | null) => any,
        /**持续接触(包括开始) */
        onContact?: (nodeCopy: Node | null) => any,
        /**动画结束 */
        onFinish?: (nodeCopy: Node | null) => any

        /**拷贝highlightArea或end至当前节点下, 优先highlightArea */
        highlight?: boolean,
        /**高亮区域，依赖highlight开启 */
        highlightArea?: Node,
        /**高亮位置偏移[x, y]，依赖highlight开启, 默认[0, 0] */
        highlightOffset?: [number, number],
    }) {
        const startPos = this.convertToNodeSpaceAR(opts.start);
        const endPos = this.convertToNodeSpaceAR(opts.end);
        if (opts.endOffset) {
            endPos.add3f(opts.endOffset[0], opts.endOffset[1], 0);
        }

        let nodeCopy: Node = null;
        if (opts.highlight) {
            if (opts.highlightOffset) {
                endPos.add3f(opts.highlightOffset[0], opts.highlightOffset[1], 0);
            }
            if (opts.highlightArea) {
                const endAreaPos = this.convertToNodeSpaceAR(opts.highlightArea);
                if (opts.highlightOffset) {
                    endAreaPos.add3f(opts.highlightOffset[0], opts.highlightOffset[1], 0);
                }
                nodeCopy = instantiate(opts.highlightArea);
                nodeCopy.getComponent(Widget)?.destroy();
                nodeCopy.setParent(this.node);
                nodeCopy.setPosition(endAreaPos);
            } else if (Node.isNode(opts.end)) {
                nodeCopy = instantiate(opts.end);
                nodeCopy.getComponent(Widget)?.destroy();
                nodeCopy.setParent(this.node);
                nodeCopy.setPosition(endPos);
            }
        }

        for (let index = 0; index < opts.count; index++) {
            const aniNode = instantiate(opts.item) as Node;
            aniNode.setPosition(startPos);
            aniNode.setParent(this.node);

            // 炸开位置
            const midPos = v3(startPos.x, startPos.y, 0);
            midPos.x += (Math.random() * 2 - 1) * (opts.startRange ? opts.startRange[0] : 100);
            midPos.y += (Math.random() * 2 - 1) * (opts.startRange ? opts.startRange[1] : 100);

            // 执行动画
            (aniNode.getComponent(UIOpacity) || aniNode.addComponent(UIOpacity)).opacity = 0;
            tween(aniNode)
                .delay(index * 0.025)
                .call(() => {
                    aniNode.getComponent(UIOpacity).opacity = 200;
                    tween(aniNode.getComponent(UIOpacity))
                        .to(0.4, { opacity: 255 }, { easing: easing.expoOut })
                        .start();
                })
                .to(0.4, { position: midPos }, { easing: easing.expoOut })
                .call(() => {
                    tween(aniNode.getComponent(UIOpacity))
                        .delay(0.5)
                        .to(0.1, { opacity: 70 })
                        .start();
                })
                .to(0.6, { position: endPos }, { easing: easing.expoIn })
                .call(() => {
                    if (index === 0) {
                        // 结束节点缩放
                        if (nodeCopy) {
                            const scale = v3(nodeCopy.scale);
                            tween(nodeCopy)
                                .to(0.1, { scale: v3(scale.x * 1.3, scale.y * 1.3) })
                                .delay(0.025 * Math.max(opts.count, 4))
                                .to(0.1, { scale: scale })
                                .call(() => {
                                    // 结束节点透明销毁
                                    const uiOpacity = nodeCopy.getComponent(UIOpacity) || nodeCopy.addComponent(UIOpacity);
                                    tween(uiOpacity)
                                        .to(0.1, { opacity: uiOpacity.opacity * 0.3 })
                                        .call(() => nodeCopy.destroy())
                                        .start();
                                })
                                .start();
                        }
                        opts.onBegin && opts.onBegin(nodeCopy);
                    }
                    opts.onContact && opts.onContact(nodeCopy);
                })
                .delay(0.01)
                .call(() => {
                    aniNode.destroy();
                    if (index === opts.count - 1) {
                        opts.onFinish && opts.onFinish(nodeCopy);
                    }
                }).start();
        }
    }
}