import {EVENT_TYPE, GAME_OBJECT_TYPE} from "../../utrl/gameEnum";
import gameEventManager from "../../utrl/gameEventManager";
import GameObject from "../gameObject";
import PlayerObject from "../player/playerObject";

const {ccclass, property} = cc._decorator;
/**子弹实体类 */
@ccclass
export default class BulletObject extends GameObject {
    /**子弹开始位置 */
    private start_pos: cc.Vec3 = null;
    /**方向速度 */
    private v: cc.Vec2 = null;
    /**子弹伤害 */
    damage = 0;
    /**所属玩家 */
    from_p: PlayerObject = null;
    /**飞行距离上限 */
    max_dis = 600;
    /**子弹速度 */
    private speed = 3000;
    /**初始化完成 */
    private inited = false;
    /**初始化
     * @param start_pos 子弹开始位置
     * @param rad 弧度角
     * @param damage 子弹伤害
     * @param from_p 所属玩家
     */

    destroyCall: Function = null;

    init(start_pos: cc.Vec3, rad: number, damage: number, from_p: PlayerObject) {
        this.start_pos = start_pos;
        this.v = cc.v2(Math.cos(rad), Math.sin(rad)).mul(this.speed);
        this.node.setPosition(start_pos.add(cc.v3(this.v).mul(50 / this.speed)));
        this.damage = damage;
        this.from_p = from_p;
        this.node.angle = rad / Math.PI * 180;
        this.inited = true;
        this.type = GAME_OBJECT_TYPE.bullet;
    }

    /**运行
     * @param dt 每帧时间
     */
    run(dt: number) {
        if (!this.inited) {
            return;
        }
        this.node.setPosition(this.node.position.add(cc.v3(this.v.mul(dt))));
        let dis = this.node.position.sub(this.start_pos).mag();
        if (dis > this.max_dis) {
            this.node.destroy();
            return;
        }
    }

    update(dt) {
        if (!this.inited) {
            return;
        }
        this.node.setPosition(this.node.position.add(cc.v3(this.v.mul(dt))));
        let dis = this.node.position.sub(this.start_pos).mag();
        if (dis > this.max_dis) {
            gameEventManager.emit(EVENT_TYPE.RECOVER_PLAYER_BULLET);
            this.node.destroy();
            return;
        }
    }

    onDestroy() {
        this.destroyCall && this.destroyCall();
    }

    /**销毁 */
    die() {
        this.node.destroy();
    }
}