/** @format */

import {ECSSystem} from '../lib/ECSSystem'
import {GenFilterKey} from '../lib/ECSComponent'
import {FightWorld} from '../worlds/FightWorld'
import {ComDie} from '../components/ComDie'
import {ComLifeTime} from '../components/ComLifeTime'
import {ComRole} from '../components/ComRole'
import {ComBehaviorTree} from '../components/ComBehaviorTree'

const FILTER_LIFE_TIME = GenFilterKey([ComLifeTime, ComRole, ComBehaviorTree], [ComDie])

export class SysLifeTime extends ECSSystem {
    /** 连接 */
    public onAdd(world: FightWorld): void {}

    /** 断开连接 */
    public onRemove(world: FightWorld): void {}

    /** 添加实体 */
    public onEntityEnter(world: FightWorld, entity: number): void {}

    /**  */
    public onEntityLeave(world: FightWorld, entity: number): void {}

    /** 更新 */
    public onUpdate(world: FightWorld, dt: number): void {
        let filter = world.getFilter(FILTER_LIFE_TIME)
        filter.walk((entity: number) => {
            let comLifeTime = world.getComponent(entity, ComLifeTime)
            if (!comLifeTime.dirty) return
            comLifeTime.countDown -= dt
            if (comLifeTime.countDown <= 0) {
                let comRole = world.getComponent(entity, ComRole)
                comLifeTime.dirty = false
                comRole.nowHP = 0
                comRole.shieldHP = 0
                comRole.HPDirty = true
            }
            return false
        })
    }
}