import { HeroViewComp } from "../../../hero/HeroViewComp";
import { BattleMoveComp } from "./BattleMoveComp";
import { ecs } from "../../../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
import { smc } from "../../SingletonModuleComp";
import { BoxSet } from "../../config/BoxSet";

@ecs.register('BattleMoveSystem')
export class BattleMoveSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate {
    filter(): ecs.IMatcher {
        return ecs.allOf(BattleMoveComp, HeroViewComp);
        
    }

    update(e: ecs.Entity) {
        if(!smc.mission.play||smc.mission.pause) return
        const move = e.get(BattleMoveComp);
        const view = e.get(HeroViewComp);

        if (!move.moving) return;
        // 检测攻击范围内是否有敌人
        // 检测友方碰撞和敌方攻击范围
        // const alliesStop = this.checkAlliesInProximity(e);
        const enemiesStop = this.checkEnemiesInRange(e, view.dis);
        const shouldStop =  enemiesStop;
        view.is_atking = shouldStop;

        // 更新渲染层级
        this.updateRenderOrder(e);

        // 同步状态
        if (!shouldStop&&view.fac==1) {
            if(view.is_stop||view.is_dead) return  //停止移动或者死亡不移动
            // 计算移动量
            const delta = (view.speed/3) * this.dt * move.direction;
            const newX = view.node.position.x + delta;
            
            view.status_change("move")
            // 新增墓地位置判断，如果已经在墓地则不再移动
            if (view.node.position.x === -1000 || view.node.position.x === 1000) {
                return;
            }
            // 限制移动范围
            if (this.validatePosition(newX, move)) {
                view.node.setPosition(newX, view.node.position.y, 0);
            }
        }
        else{
            view.status_change("idle")
        }


        // console.log(`[${view.hero_name}] 类型:${view.type} 是否停止:${shouldStop} 方向:${move.direction} 位置:${view.node.position.x.toFixed(1)}`);
    }

    /** 验证目标位置有效性 */
    private validatePosition(newX: number, move: BattleMoveComp): boolean {
        // 我方不能超过右边界，敌方不能超过左边界
        return move.direction === 1 ? 
            newX <= move.targetX : 
            newX >= move.targetX;
    }

    /** 检测友方单位碰撞 */
    private checkAlliesInProximity(entity: ecs.Entity): boolean {
        const current = entity.get(HeroViewComp);
        const currentPos = current.node.position;
        const SAFE_DISTANCE = 30; // 安全距离

        // 查找同阵营同类型的所有友军（包括当前单位）
        const allAllies = ecs.query(ecs.allOf(HeroViewComp)).filter(e => {
            const other = e.get(HeroViewComp);
            return (e === entity || (
                other.fac === current.fac &&
                other.type === current.type
            ));
        });

        // 按uuid从小到大排序
        const sortedAllies = allAllies.sort((a, b) => {
            return a.get(HeroViewComp).hero_uuid - b.get(HeroViewComp).hero_uuid;
        });

        // 找到当前单位在排序中的位置
        const currentIndex = sortedAllies.findIndex(e => e === entity);
        
        // 设置渲染顺序
        if (current.is_boss) {
            // boss显示在最上层
            current.node.setSiblingIndex(999);
        } else {
            // 非boss单位，uuid越小的显示在下层（索引越小）
            current.node.setSiblingIndex(currentIndex);
        }
        
        // 如果是uuid最小的单位，直接移动
        if (currentIndex === 0) {
            current.is_stop_temp = false;
            return false;
        }

        // 获取前一个单位（uuid比当前小的最近单位）
        // const prevUnit = sortedAllies[currentIndex - 1];
        // const prevView = prevUnit.get(HeroViewComp);
        // const distToPrev = Math.abs(currentPos.x - prevView.node.position.x);

        // 如果与前一个单位距离小于安全距离，则停止
        // if (distToPrev < SAFE_DISTANCE) {
        //     current.is_stop_temp = true;
        //     return true;
        // }

        // 如果与前一个单位距离大于安全距离，则移动
        current.is_stop_temp = false;
        return false;
    }

    /** 检测攻击范围内敌人 */
    private checkEnemiesInRange(entity: ecs.Entity, range: number): boolean {
        const currentPos = entity.get(HeroViewComp).node.position;
        const team = entity.get(HeroViewComp).fac;
        const view = entity.get(HeroViewComp);
        // const isMelee = view.type === 0; 
        const isMelee = false;

        return ecs.query(ecs.allOf(HeroViewComp)).some(e => {
            const view = e.get(HeroViewComp);
            const distance = Math.abs(currentPos.x - view.node.position.x);
            
            if (isMelee) {
                // 近战需要满足：在攻击范围内且距离<=75才停止
                const inAttackRange = distance <= range;
                const closeEnough = distance <= 75; // 近战停止距离
                return view.fac !== team && inAttackRange && closeEnough;
            }
            else {
                // 远程/辅助：在攻击范围内即停止
                return view.fac !== team && distance <= range;
            }
        });
    }

    /** 更新渲染层级 */
    private updateRenderOrder(entity: ecs.Entity) {
        const current = entity.get(HeroViewComp);
        
        // 查找所有单位
        const allUnits = ecs.query(ecs.allOf(HeroViewComp)).filter(e => {
            const other = e.get(HeroViewComp);
            return other.fac === current.fac;  // 按阵营分组
        });

        // 按y坐标从大到小排序（y坐标越小显示在上层）
        const sortedUnits = allUnits.sort((a, b) => {
            const posA = a.get(HeroViewComp).node.position.y;
            const posB = b.get(HeroViewComp).node.position.y;
            return posB - posA;  // 修改排序顺序
        });

        // 设置渲染顺序

        // 根据y坐标设置层级，y坐标越小的显示在上层
        const index = sortedUnits.findIndex(e => e === entity);
        current.node.setSiblingIndex(index);
        
    }
}