import { ecs } from "../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
import { HeroViewComp } from "./HeroViewComp";
import { HeroAttrsComp } from "./HeroAttrsComp";
import { smc } from "../common/SingletonModuleComp";
import { FacSet } from "../common/config/GameSet";
import { Attrs } from "../common/config/HeroAttrs";

/** 怪物移动组件 */
@ecs.register('MonMove')
export class MonMoveComp extends ecs.Comp {
     /** 移动方向：1向右，-1向左 */
    direction: number = 1;
    /** 目标x坐标 */
    targetX: number = 0;
    /** 是否处于移动状态 */
    moving: boolean = true;

    reset() {
        this.direction = 1;
        this.targetX = 0;
        this.moving = true;
    }
}

/** 怪物移动系统 - 专门处理怪物的移动逻辑 */
@ecs.register('MonMoveSystem')
export class MonMoveSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate {
    filter(): ecs.IMatcher {
        return ecs.allOf(MonMoveComp, HeroViewComp, HeroAttrsComp);
    }

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

        // 只处理怪物
        if (model.fac !== FacSet.MON) return;
        if (!move.moving) return;

        const shouldStop = this.checkEnemiesInFace(e);
        model.is_atking = this.checkEnemiesInRange(e, model.Attrs[Attrs.DIS]);
        
        // 更新渲染层级
        this.updateRenderOrder(e);

        if (!shouldStop) {
            if (model.is_stop || model.is_dead || model.isStun() || model.isFrost()) {
                view.status_change("idle");
                return;
            }
            
            // 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) {
                view.status_change("idle");
                return;
            }

            // 怪物简单移动逻辑：向目标方向移动
            const delta = (model.Attrs[Attrs.SPEED]/3) * this.dt * move.direction;
            const newX = view.node.position.x + delta;
            
            // 限制移动范围
            if (this.validatePosition(newX, move)) {
                view.status_change("move");
                view.node.setPosition(newX, view.node.position.y, 0);
            } else {
                // 当达到目标位置边界时也切换为idle状态
                view.status_change("idle");
                // 达到边界是永久停止，设置moving为false
                move.moving = false;
            }
        } else {
            view.status_change("idle");
            // 因为敌人在面前而暂时停止，不设置moving为false，保持检查状态
        }
    }

    /** 验证目标位置有效性 */
    private validatePosition(newX: number, move: MonMoveComp): 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;
    }

    /** 检测攻击范围内敌人 */
    private checkEnemiesInRange(entity: ecs.Entity, range: number): boolean {
        const currentView = entity.get(HeroViewComp);
        if (!currentView || !currentView.node) return false;
        
        const currentPos = currentView.node.position;
        const team = entity.get(HeroAttrsComp).fac;
        let found = false;
        ecs.query(ecs.allOf(HeroAttrsComp, HeroViewComp)).some(e => {
            const model = e.get(HeroAttrsComp);
            const view = e.get(HeroViewComp);
            if (!view || !view.node) return false;
            const distance = Math.abs(currentPos.x - view.node.position.x);
            if (model.fac !== team && !model.is_dead) {
                if (distance <= range) {
                    found = true;
                    return true;
                }
            }
        });
        return found;
    }

    /** 检测面前是否有敌人 */
    private checkEnemiesInFace(entity: ecs.Entity): boolean {
        const currentView = entity.get(HeroViewComp);
        if (!currentView || !currentView.node) return false;
        
        const currentPos = currentView.node.position;
        const team = entity.get(HeroAttrsComp).fac;
        let found = false;
        ecs.query(ecs.allOf(HeroAttrsComp, HeroViewComp)).some(e => {
            const model = e.get(HeroAttrsComp);
            const view = e.get(HeroViewComp);
            if (!view || !view.node) return false;
            const distance = Math.abs(currentPos.x - view.node.position.x);
            if (model.fac !== team && !model.is_dead) {
                if (distance <= 75) {
                    found = true;
                    return true;
                }
            }
        });
        return found;
    }

    /** 更新渲染层级 */
    private updateRenderOrder(entity: ecs.Entity) {
        const currentView = entity.get(HeroViewComp);
        const currentModel = entity.get(HeroAttrsComp);
        
        // 查找所有怪物单位
        const allUnits = ecs.query(ecs.allOf(HeroAttrsComp, HeroViewComp))
            .filter(e => {
                const otherModel = e.get(HeroAttrsComp);
                return otherModel.fac === currentModel.fac;  // 按阵营分组
            })
            .map(e => e);

        // 按x坐标排序：x坐标越大（越前面）的显示在上层
        const sortedUnits = allUnits.sort((a, b) => {
            const viewA = a.get(HeroViewComp);
            const viewB = b.get(HeroViewComp);
            if (!viewA || !viewA.node || !viewB || !viewB.node) return 0;
            const posA = viewA.node.position.x;
            const posB = viewB.node.position.x;
            return posA - posB;  // x坐标从小到大排序
        });

        // 设置渲染顺序：x坐标越大的显示在上层（index越大，层级越高）
        sortedUnits.forEach((unit, index) => {
            const model = unit.get(HeroViewComp);
            model.node.setSiblingIndex(index);  // 直接使用index，x坐标大的index大，层级高
        });
    }
}