/**
 * @file MissionMonComp.ts
 * @description 怪物（Monster）波次刷新管理组件（逻辑层）
 *
 * 职责：
 *   1. 管理每一波怪物的生成计划：根据 RogueConfig 生成怪物。
 *   2. 自动推进波次：在准备阶段结束时（PhasePrepareEnd）启动分批释放。
 *   3. 分批刷怪：每波固定 3 批，每 10 秒释放一批，批内按 MON_SPAWN_INTERVAL 逐个刷出。
 *
 * 关键设计：
 *   - 所有怪物统一从右侧 X=400 出生点逐个刷出（MON_SPAWN_INTERVAL 节奏控制）。
 *   - 实际阵型与推进由 MonMoveComp 在战斗中向左移动自然形成，不再使用固定网格点。
 *   - 槽位索引（3行×4列）仅用于 monGrid 寻路与 SCastSystem 索敌定位。
 *   - 上一波残留怪在波次结束/开始时统一清理。
 */
import { _decorator, v3, Vec3 } from "cc";
import { mLogger } from "../common/Logger";
import { ecs } from "../../../../extensions/oops-plugin-framework/assets/libs/ecs/ECS";
import { CCComp } from "../../../../extensions/oops-plugin-framework/assets/module/common/CCComp";
import { oops } from "../../../../extensions/oops-plugin-framework/assets/core/Oops";
import { Monster } from "../hero/Mon";
import { smc } from "../common/SingletonModuleComp";
import { GameEvent } from "../common/config/GameEvent";
import { BoxSet, FacSet } from "../common/config/GameSet";
import { spawningEngine, GeneratedMonster, TestModeConfig, MAX_MONSTERS, BATCH_COUNT, BATCH_INTERVAL } from "./RogueConfig";
import { HeroAttrsComp } from "../hero/HeroAttrsComp";
import { MonMoveComp } from "../hero/MonMoveComp";

const { ccclass, property } = _decorator;

@ccclass('MissionMonCompComp')
@ecs.register('MissionMonComp', false)
export class MissionMonCompComp extends CCComp {
    // ======================== 常量 ========================

    /** 怪物出生掉落高度 */
    private static readonly MON_DROP_HEIGHT = 0;
    /** 怪物统一从右侧 X=400 出生点逐个刷出，随后向左推进 */
    private static readonly MON_SPAWN_X = 400;
    /** 逐个刷怪间隔（秒）：保证怪物排成纵队，避免堆叠 */
    private static readonly MON_SPAWN_INTERVAL = 0.3;

    /**
     * 怪物占位点：所有槽位统一以右侧出生点 (X=400) 作为坐标，
     * 实际阵型由 MonMoveComp 在战斗中向左推进时自然拉开。
     * 槽位索引仍保留 3 行 × 4 列结构，供 monGrid 寻路与 SCastSystem 索敌使用。
     * 超出 12 个槽位的怪物（放松波）按 spawnIndex % 12 复用槽位。
     */
    public static readonly MON_POSITIONS: Vec3[] = [
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 0: Col1-Top
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 1: Col1-Mid
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 2: Col1-Bot
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 3: Col2-Top
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 4: Col2-Mid
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 5: Col2-Bot
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 6: Col3-Top
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 7: Col3-Mid
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 8: Col3-Bot
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 9: Col4-Top
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 10: Col4-Mid
        v3(MissionMonCompComp.MON_SPAWN_X, BoxSet.GAME_LINE, 0),  // index 11: Col4-Bot
    ];

    // ======================== 编辑器属性 ========================

    @property({ tooltip: "是否启用调试日志" })
    private debugMode: boolean = false;

    // ======================== 运行时状态 ========================

    /** 全局生成顺序计数器（用于渲染层级排序） */
    private globalSpawnOrder: number = 0;
    /** 当前波数 */
    private currentWave: number = 0;
    /** 当前波的目标怪物总数 */
    private waveTargetCount: number = 0;
    /** 当前波已生成的怪物数量 */
    private waveSpawnedCount: number = 0;
    /** 等待生成的怪物队列（按批次分组，batch 0~2） */
    private pendingBatches: GeneratedMonster[][] = [[], [], []];
    /** 当前正在释放的批次索引 */
    private currentBatch: number = 0;
    /** 批次释放计时器（秒） */
    private batchTimer: number = 0;
    /** 是否正在分批释放中 */
    private isReleasing: boolean = false;
    /** 逐个刷怪队列：从当前批次转入，按节奏在 update 中释放 */
    private spawnQueue: GeneratedMonster[] = [];
    /** 逐个刷怪累计计时（秒） */
    private spawnTimer: number = 0;

    // ======================== 生命周期 ========================

    onLoad() {
        this.on(GameEvent.FightReady, this.fight_ready, this);
        this.on("PhasePrepareEnd", this.onPhasePrepareEnd, this);
        this.on("TimeUpAdvanceWave", this.onTimeUpAdvanceWave, this);
    }

    protected update(dt: number): void {
        // 统计待刷出的怪物总数（未释放的批次 + 正在释放的队列）
        let pendingCount = this.spawnQueue.length;
        for (let i = this.currentBatch; i < BATCH_COUNT; i++) {
            pendingCount += this.pendingBatches[i].length;
        }
        smc.vmdata.mission_data.pending_mon_num = pendingCount;

        // 分批释放：按 BATCH_INTERVAL 节奏推进批次
        if (this.isReleasing) {
            this.batchTimer += dt;
            if (this.batchTimer >= BATCH_INTERVAL && this.currentBatch < BATCH_COUNT - 1) {
                this.batchTimer = 0;
                this.advanceBatch();
            }
        }

        // 逐个刷怪：按 MON_SPAWN_INTERVAL 节奏从队列释放
        if (this.spawnQueue.length > 0) {
            this.spawnTimer += dt;
            if (this.spawnTimer >= MissionMonCompComp.MON_SPAWN_INTERVAL) {
                this.spawnTimer = 0;
                const monData = this.spawnQueue.shift()!;
                const targetPosIndex = this.waveSpawnedCount % MissionMonCompComp.MON_POSITIONS.length;
                this.addMonsterAtGrid(targetPosIndex, monData, this.currentWave);
                this.waveSpawnedCount++;
            }
        }
    }

    start() {}

    private setupWaveData(monsters: GeneratedMonster[]) {
        // 按批次分组
        this.pendingBatches = [[], [], []];
        for (const m of monsters) {
            const batch = Math.min(m.batch, BATCH_COUNT - 1);
            this.pendingBatches[batch].push(m);
        }

        this.waveTargetCount = monsters.length;
        smc.vmdata.mission_data.pending_mon_num = this.waveTargetCount;

        let hasBoss = monsters.some(m => m.isBoss);

        mLogger.log(this.debugMode, 'MissionMonComp', `[MissionMonComp] 波次 ${this.currentWave} 生成怪物总数: ${this.waveTargetCount}`);

        oops.message.dispatchEvent(GameEvent.NewWave, {
            wave: this.currentWave,
            total: this.waveTargetCount,
            bossWave: hasBoss,
        });
    }

    /**
     * 战斗准备：重置所有运行时状态并开始第一波。
     */
    fight_ready() {
        smc.vmdata.mission_data.mon_num = 0;
        smc.mission.stop_spawn_mon = false;
        this.globalSpawnOrder = 0;
        this.currentWave = 1;
        this.waveTargetCount = 0;
        this.waveSpawnedCount = 0;
        this.pendingBatches = [[], [], []];
        this.currentBatch = 0;
        this.batchTimer = 0;
        this.isReleasing = false;
        this.spawnQueue = [];
        this.spawnTimer = 0;

        // 预生成第一波数据以获取数量和 Boss 信息
        const monsters = spawningEngine.generateWave(this.currentWave);
        this.setupWaveData(monsters);

        if (TestModeConfig.enable) {
            mLogger.log(this.debugMode, 'MissionMonComp', "[MissionMonComp] 测试模式已开启");
        }

        mLogger.log(this.debugMode, 'MissionMonComp', "[MissionMonComp] Starting Wave System");
    }

    // ======================== 波次管理 ========================

    /**
     * 开始下一波：波数 +1 并预生成数据
     */
    private onTimeUpAdvanceWave() {
        this.currentWave += 1;
        smc.vmdata.mission_data.level = this.currentWave;

        const monsters = spawningEngine.generateWave(this.currentWave);
        this.setupWaveData(monsters);
    }

    private onPhasePrepareEnd() {
        this.resetSlotSpawnData();

        // 准备结束阶段：启动分批释放，
        // 第一批立即转入 spawnQueue，后续批次由 update 按 BATCH_INTERVAL 推进。
        this.startBatchRelease();
    }

    // ======================== 分批释放 ========================

    /** 启动分批释放：立即释放第一批，启动批次计时器 */
    private startBatchRelease() {
        this.currentBatch = 0;
        this.batchTimer = 0;
        this.isReleasing = true;
        this.releaseCurrentBatch();
    }

    /** 推进到下一批次 */
    private advanceBatch() {
        if (this.currentBatch >= BATCH_COUNT - 1) {
            this.isReleasing = false;
            return;
        }
        this.currentBatch++;
        this.releaseCurrentBatch();
    }

    /** 将当前批次的怪物转入 spawnQueue，等待逐个刷出 */
    private releaseCurrentBatch() {
        const batch = this.pendingBatches[this.currentBatch];
        if (batch.length === 0) {
            // 当前批次为空，尝试推进到下一批
            if (this.currentBatch < BATCH_COUNT - 1) {
                this.currentBatch++;
                this.releaseCurrentBatch();
            } else {
                this.isReleasing = false;
            }
            return;
        }

        // 将批次怪物转入逐个刷怪队列
        for (const m of batch) {
            this.spawnQueue.push(m);
        }
        batch.length = 0;

        // 让首个怪物在下一帧立即刷出，避免额外延迟
        this.spawnTimer = MissionMonCompComp.MON_SPAWN_INTERVAL;
    }

    // ======================== 槽位管理 ========================

    /**
     * 清理上一波残留怪物，并重置生成计数与逐个刷怪队列
     */
    private resetSlotSpawnData() {
        ecs.query(ecs.allOf(HeroAttrsComp)).forEach(e => {
            const attrs = e.get(HeroAttrsComp);
            if (attrs && attrs.fac === FacSet.MON && !attrs.is_dead) {
                e.destroy();
            }
        });

        this.waveSpawnedCount = 0;
        // 同步丢弃上一波未释放的队列，避免与新一波混合
        this.spawnQueue = [];
        this.spawnTimer = 0;
        this.isReleasing = false;
        this.currentBatch = 0;
        this.batchTimer = 0;
    }

    // ======================== 怪物生成 ========================

    /**
     * 在指定位置索引处生成一个怪物
     */
    private addMonsterAtGrid(
        posIndex: number,
        monData: GeneratedMonster,
        monLv: number = 1
    ) {
        let mon = ecs.getEntity<Monster>(Monster);
        let scale = -1;

        const basePos = MissionMonCompComp.MON_POSITIONS[posIndex % MissionMonCompComp.MON_POSITIONS.length];
        const spawnX = basePos.x;
        const landingY = basePos.y + (monData.isBoss ? 6 : 0);
        const spawnPos: Vec3 = v3(spawnX, landingY + MissionMonCompComp.MON_DROP_HEIGHT, 0);
        this.globalSpawnOrder = (this.globalSpawnOrder + 1) % 999;

        // 技能套装注入：通过 _testSkills 通道传递给 Mon.load()
        if (monData.skills) {
            (mon as any)._testSkills = monData.skills;
        }

        mon.load(spawnPos, scale, monData.uuid, monData.isBoss, landingY, monLv, posIndex);

        const move = mon.get(MonMoveComp);
        if (move) {
            move.spawnOrder = this.globalSpawnOrder;
        }

        // 应用新引擎计算好的最终属性
        const model = mon.get(HeroAttrsComp);
        if (model) {
            model.ap = monData.ap;
            model.hp_max = monData.hp;
            model.hp = model.hp_max;
        }
    }

    /** ECS 组件移除时触发 */
    reset() {}
}