import { v3, Vec3 ,Node} from "cc";
import { ecs } from "../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
import { EType, RType, SkillSet } from "../common/config/SkillSet";
import { SMoveDataComp } from "./SMoveComp";
import { smc } from "../common/SingletonModuleComp";
import { SkillView } from "./SkillView";

/**
 * ==================== 技能移动系统 ====================
 * 
 * 职责：
 * 1. 处理技能实体的移动逻辑
 * 2. 更新技能位置
 * 3. 管理移动生命周期
 * 4. 支持多种移动类型
 * 
 * 设计理念：
 * - 参考DamageQueueComp的实现方式
 * - 独立的移动处理系统
 * - 支持从视图层获取的参数
 */
@ecs.register('SMoveSystem')
export class SMoveSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate {
    
    filter(): ecs.IMatcher {
        return ecs.allOf(SMoveDataComp, SkillView);
    }
    
    entityEnter(entity: ecs.Entity): void {
        const moveComp = entity.get(SMoveDataComp);
        const skillView = entity.get(SkillView);
        
        if (!moveComp || !skillView || !skillView.node) return;
        
        // 获取技能配置
        const skillConfig = SkillSet[moveComp.s_uuid];
        if (!skillConfig) {
            console.warn(`[SMoveSystem] 技能配置不存在: ${moveComp.s_uuid}`);
            return;
        }
        
        // 根据配置设置移动速度
        if (skillConfig.speed > 0) {
            moveComp.speed = skillConfig.speed;
        }
        
        // 根据runType设置初始位置
        this.initializePosition(moveComp, skillView);
        
        // 开始移动（除了固定位置类型）
        if (moveComp.runType !== RType.fixed && moveComp.runType !== RType.fixedEnd) {
            moveComp.startMove();
        }
        
        // console.log(`[SMoveSystem] 技能 ${skillConfig.name} 开始移动，类型: ${moveComp.runType}`);
    }
    
    /**
     * 根据runType初始化技能位置
     */
    private initializePosition(moveComp: SMoveDataComp, skillView: SkillView): void {
        const node = skillView.node;
        
        switch(moveComp.runType) {
            case RType.linear:
                // linear类型：根据atk_x和atk_y调整位置
                const linearPos = v3(
                    node.position.x + moveComp.atk_x,
                    node.position.y + moveComp.atk_y,
                    node.position.z
                );
                moveComp.rePos(linearPos);
                
                // 设置旋转角度
                const direction = new Vec3();
                Vec3.subtract(direction, moveComp.targetPos, moveComp.startPos);
                if (direction.length() > 0.01) {
                    const angle = Math.atan2(direction.y, direction.x) * (180 / Math.PI);
                    node.angle = angle;
                }
                break;
                
            case RType.fixed:
                // 固定起始位置
                node.setPosition(moveComp.startPos.x, node.position.y, 0);
                break;
                
            case RType.fixedEnd:
                // 固定结束位置
                node.setPosition(moveComp.targetPos.x > 360 ? 300 : moveComp.targetPos.x, node.position.y, 0);
                break;
                
            default:
                // 其他类型（包括bezier）：根据atk_x和atk_y调整起始位置
                if (moveComp.atk_x !== 0 || moveComp.atk_y !== 0) {
                    const adjustedStartPos = v3(
                        moveComp.startPos.x + moveComp.atk_x * moveComp.scale,
                        moveComp.startPos.y + moveComp.atk_y,
                        moveComp.startPos.z
                    );
                    moveComp.startPos.set(adjustedStartPos);
                    node.setPosition(adjustedStartPos);
                }
                break;
        }
    }
    
    update(entity: ecs.Entity): void {
        if(!smc.mission.play ) return;
        if(smc.mission.pause) return
        const moveComp = entity.get(SMoveDataComp);
        const skillView = entity.get(SkillView);
        
        if (!moveComp || !skillView || !skillView.node) return;
        
        // 更新移动进度
        const isMoving = moveComp.updateProgress(this.dt);
        
        if (isMoving) {
            // 更新节点位置
            skillView.node.setPosition(moveComp.currentPos);
            
            // 处理自动旋转（贝塞尔移动）
            if (moveComp.runType === RType.bezier) {
                this.updateRotation(skillView.node, moveComp);
            }
        }
        
        // 检查移动完成
        if (moveComp.isCompleted && moveComp.autoDestroy) {
            // 根据结束类型决定是否销毁
            if (moveComp.endType === EType.timeEnd || moveComp.endType === EType.collision) {
                entity.destroy();
            }
        }
    }
    
    /**
     * 更新节点旋转（用于贝塞尔移动）
     */
    private updateRotation(node: Node, moveComp: SMoveDataComp) {
        if (moveComp.progress < 1) {
            // 计算下一帧的位置来确定方向
            const nextProgress = Math.min(moveComp.progress + 0.01, 1);
            const nextPos = v3(0, 0, 0);
            
            // 计算下一个位置
            const t = nextProgress;
            const oneMinusT = 1 - t;
            const oneMinusTSquared = oneMinusT * oneMinusT;
            const tSquared = t * t;
            const twoOneMinusTt = 2 * oneMinusT * t;
            
            nextPos.x = oneMinusTSquared * moveComp.startPos.x + 
                       twoOneMinusTt * moveComp.controlPoint.x + 
                       tSquared * moveComp.targetPos.x;
                       
            nextPos.y = oneMinusTSquared * moveComp.startPos.y + 
                       twoOneMinusTt * moveComp.controlPoint.y + 
                       tSquared * moveComp.targetPos.y;
            
            // 计算方向角度
            const direction = new Vec3();
            Vec3.subtract(direction, nextPos, moveComp.currentPos);
            
            if (direction.length() > 0.01) {
                const angle = Math.atan2(direction.y, direction.x) * (180 / Math.PI);
                node.angle = angle;
            }
        }
    }
}

/**
 * ==================== 技能移动辅助工具 ====================
 */
export class SMoveHelper {
    /**
     * 为技能实体设置移动参数
     */
    static setupMoveForSkill(entity: ecs.Entity, startPos: Vec3, targetPos: Vec3, s_uuid: number): void {
        let moveComp = entity.get(SMoveDataComp);
        
        if (!moveComp) {
            moveComp = entity.add(SMoveDataComp);
        }
        
        moveComp.startPos.set(startPos);
        moveComp.targetPos.set(targetPos);
        moveComp.s_uuid = s_uuid;
        
        // 从技能配置获取默认参数
        const skillConfig = SkillSet[s_uuid];
        if (skillConfig) {
            moveComp.runType = skillConfig.RType || RType.linear;
            moveComp.speed = skillConfig.speed || 500;
        }
    }
    
    /**
     * 检查技能是否正在移动
     */
    static isSkillMoving(entity: ecs.Entity): boolean {
        const moveComp = entity.get(SMoveDataComp);
        return moveComp ? moveComp.isMoving : false;
    }
    
    /**
     * 获取技能移动统计信息
     */
    static getSkillMoveStats(entity: ecs.Entity): any {
        const moveComp = entity.get(SMoveDataComp);
        return moveComp ? moveComp.getMoveStats() : null;
    }
    
    /**
     * 停止技能移动
     */
    static stopSkillMove(entity: ecs.Entity): void {
        const moveComp = entity.get(SMoveDataComp);
        if (moveComp) {
            moveComp.stopMove();
        }
    }
}