import { Node, UI, UITransform, Vec3 } from "cc";
import { ecs } from "../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
import { HeroViewComp } from "../hero/HeroViewComp";
import { SkillSet, TargetGroup, TargetType } from "../common/config/SkillSet";
import { CdType } from "../common/config/SkillSet";
import { oops } from "db://oops-framework/core/Oops";
import { GameEvent } from "../common/config/GameEvent";
import { Skill } from "../skills/Skill";
import { SkillCom } from "../skills/SkillCom";
import { AnimType } from "../common/config/SkillSet";
import { BoxSet } from "../common/config/BoxSet";


/** 技能系统 */
@ecs.register('HeroSkillSystem')
export class HeroSkillSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate {
// export class HeroSkillSystem  implements ecs.ISystemUpdate {
    // private updateInterval: number = 0.1; // 每0.1秒更新一次
    // private accumulator: number = 0;
    private _timers: { [key: string]: number } = {};
    private _damageQueue: Array<{ timer: number; callback: () => void }> = [];
    init(): void {
        oops.message.on(GameEvent.MissionEnd, this.clear_timer, this);
    }
    filter(): ecs.IMatcher {
        return ecs.allOf(HeroViewComp);
    }
    update(e: ecs.Entity) {
        //return false
        // 处理伤害队列
        const view = e.get(HeroViewComp);
            // 只在攻击状态触发技能
            if (view.is_atking &&view.at > view.cd) {
                const config = SkillSet[view.atk_skill];
                if (!config) return;
                this.castSkill(e, view.atk_skill, config);
                view.at = 0;
            }

    }

    /** 施放技能 */
    private castSkill(caster: ecs.Entity, skillId: number, config: typeof SkillSet[keyof typeof SkillSet]) {
        const view = caster.get(HeroViewComp);
        const skillEntity = ecs.getEntity<Skill>(Skill);
        console.log(view.uuid+"=>"+view.hero_name+"施放技能:"+config.uuid);
        if (config.TargetGroup === TargetGroup.Enemy) {
            const targets = this.selectEnemyTargets(caster, config);
            console.log("敌人 targets:"+targets);
            if (targets.length === 0) return;
            skillEntity.load(
                new Vec3(view.node.position.x, view.node.position.y+BoxSet.ATK_Y, 0),   // 起始位置
                view.box_group,              // 阵营
                view.node.parent,      // 父节点
                config.uuid,           // 技能ID
                new Vec3(targets[0]?.get(HeroViewComp).node.position.x, targets[0]?.get(HeroViewComp).node.position.y, 0), // 目标位置
                view
            );
            caster.get(HeroViewComp).playSkillEffect(config.uuid);
            console.log("技能:"+config.uuid+"=>"+targets[0]?.get(HeroViewComp).hero_name);
        }

        if (config.TargetGroup === TargetGroup.Ally) {
            const targets = this.selectAllyTargets(caster, config);
            if (targets.length === 0) return;
          
        }
        if (config.TargetGroup === TargetGroup.Self) {
           
        }
  
    }

    private selectEnemyTargets(caster: ecs.Entity, config: typeof SkillSet[keyof typeof SkillSet]): ecs.Entity[] {
        const casterView = caster.get(HeroViewComp);
        const team = casterView.fac;
        const isEnemyTeam = team === 0 ? 1 : 0;
        const candidates= ecs.query(ecs.allOf(HeroViewComp)).filter(e => e.get(HeroViewComp).fac !== team);
        return this.filterFrontRow(candidates, isEnemyTeam);
    }
    private selectAllyTargets(caster: ecs.Entity, config: typeof SkillSet[keyof typeof SkillSet]): ecs.Entity[] {
        const casterView = caster.get(HeroViewComp);
        const team = casterView.fac;
        const candidates= ecs.query(ecs.allOf(HeroViewComp)).filter(e => e.get(HeroViewComp).fac === team);
        // 第二阶段：位置/血量等精细筛选
        switch(config.TargetType) {
            case TargetType.Melee:
                return candidates.filter(e => e.get(HeroViewComp).type === 0);
            case TargetType.Ranged:
                return candidates.filter(e => e.get(HeroViewComp).type === 1);
            case TargetType.SupportClass:
                return candidates.filter(e => e.get(HeroViewComp).type === 2);
            case TargetType.Random:
                return this.pickRandomTarget(candidates, config.count || 1);
            default:
                return candidates;
        }
    }
   
    /** 筛选最前排单位 */
    private filterFrontRow(entities: ecs.Entity[], isEnemyTeam: number): ecs.Entity[] {
        // 敌方最前排是x坐标最大的，我方最前排是x坐标最小的
        const keyPos = isEnemyTeam ? 
            Math.min(...entities.map(e => e.get(HeroViewComp).node.position.x)) :
            Math.max(...entities.map(e => e.get(HeroViewComp).node.position.x));
            
        return entities.filter(e => 
            Math.abs(e.get(HeroViewComp).node.position.x - keyPos) < 10
        );
    }

    /** 随机选择目标 */
    private pickRandomTarget(entities: ecs.Entity[], count: number): ecs.Entity[] {
        const shuffled = [...entities].sort(() => 0.5 - Math.random());
        return shuffled.slice(0, count);
    }


    public clear_timer() {
        console.log("clear_timer");
        Object.values(this._timers).forEach(clearTimeout);
    }
    onDestroy() {
        Object.values(this._timers).forEach(clearTimeout);
    }


    /** 应用负面状态 */
    private applyDebuff(target: ecs.Entity, config: typeof SkillSet[keyof typeof SkillSet]) {
        // 实现debuff逻辑...
    }

}