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, IndexSet } 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;
    /** 线路标识：0=一线(y=120)，1=二线(y=80) */
    lane: number = 0;
    /** 生成顺序：用于同线路内的层级排序，数值越大越晚生成，层级越前 */
    spawnOrder: number = 0;

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

/** 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) {
        // 直接调用全局更新方法，避免重复计算
        this.updateAllUnitsRenderOrder();
    }

    /** 更新所有单位的渲染层级 */
    private updateAllUnitsRenderOrder() {
        // 获取所有单位
        const allUnits = ecs.query(ecs.allOf(HeroAttrsComp, HeroViewComp));
        
        // 创建单位数组，包含层级信息
        const unitsWithOrder: Array<{
            entity: ecs.Entity,
            view: HeroViewComp,
            order: number
        }> = [];
        
        allUnits.forEach(e => {
            const model = e.get(HeroAttrsComp);
            const view = e.get(HeroViewComp);
            
            if (!view || !view.node || !model) return;
            
            let order = 0;
            
            if (model.fac === FacSet.HERO) {
                // 英雄层级：基础层级 + y轴位置影响
                order = IndexSet.HERO + Math.floor(view.node.position.y);
            } else if (model.fac === FacSet.MON) {
                const move = e.get(MonMoveComp);
                if (move) {
                    // 怪物层级：基于线路和生成顺序
                    const baseLane = move.lane === 0 ? IndexSet.MON1 : IndexSet.MON2;
                    order = baseLane + (move.spawnOrder * IndexSet.MON_INCREMENT);
                }
            }
            
            unitsWithOrder.push({
                entity: e,
                view: view,
                order: order
            });
        });

        // 按层级排序：order值小的在后面（siblingIndex小），order值大的在前面（siblingIndex大）
        unitsWithOrder.sort((a, b) => a.order - b.order);
        
        // 设置 siblingIndex
        unitsWithOrder.forEach((unit, index) => {
            unit.view.node.setSiblingIndex(index);
        });
    }
}