/**
 * @file MissionMonComp.ts
 * @description 怪物（Monster）回合刷新管理组件（逻辑层）
 *
 * 职责：
 *   1. 管理每一回合怪物的生成计划：根据 RogueConfig 生成怪物。
 *   2. 自动推进回合：在准备阶段结束时（PhasePrepareEnd）启动分批释放。
 *   3. 持续刷怪：回合开始整波进入队列，30 秒内按速度曲线匀速刷出（铺垫 → 加压 → 高潮）。
 *
 * 关键设计：
 *   - 所有怪物统一从右侧 X=400 出生点刷出，速度曲线由 m.batch 驱动（前慢后快，压轴批自动高潮）。
 *   - 每帧欠账式补刷（期望数 − 已刷数），自动补偿帧余量，保证 30 秒预算不流失。
 *   - 场上怪物超阈值（stop_spawn_mon）时暂停推进，恢复后瞬时补齐欠账。
 *   - 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。
 *   - 上一回合残留怪在回合结束/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, WAVE_DURATION } 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;

    /**
     * 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（放松回合）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;
    /** 当前回合数 */
    private currentWave: number = 0;
    /** 当前回合的目标怪物总数 */
    private waveTargetCount: number = 0;
    /** 当前回合已生成的怪物数量 */
    private waveSpawnedCount: number = 0;
    /** 待刷队列（回合开始时整波进入，按速度曲线匀速刷出） */
    private spawnQueue: GeneratedMonster[] = [];
    /** 本回合已推进的战斗时间（秒，暂停刷怪时冻结） */
    private waveTime: number = 0;
    /** 各批次在队列中的起始下标（用于速度曲线按批变速） */
    private batchStarts: number[] = [0, 0, 0];
    /** 是否正在刷怪释放中 */
    private isReleasing: boolean = false;
    /** 当前批已刷出的怪物数（清场加速存活比例分母） */
    private batchReleasedCount: number = 0;
    /** 当前批是否已通过清场加速提前推进过（每批只触发一次） */
    private batchFastForwarded: boolean = false;
    /** 清场加速检测节流计时器（秒） */
    private aliveCheckTimer: number = 0;
    /** 本回合因清场加速累计节省的秒数（供 MissionComp 还原 DDA 判定口径，避免双重惩罚） */
    public waveEarlySkipTotal: number = 0;
    /** 清场加速触发阈值：当前批存活比例低于此值时提前推进（0.25 = 清掉 75%） */
    private static readonly BATCH_EARLY_RATIO = 0.25;
    /** 清场加速提前量（秒）：等效推进时间快进，保底不被瞬间叠爆 */
    private static readonly BATCH_EARLY_SKIP = 2.0;
    /** 批次时间边界（秒）：batch0 → [0, T1)，batch1 → [T1, T2)，batch2 → [T2, WAVE_DURATION] */
    private static readonly BATCH_T1 = WAVE_DURATION * 0.25;
    private static readonly BATCH_T2 = WAVE_DURATION * 0.60;

    // ======================== 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 {
        // 待刷出统计（回合结束检测与 HUD 进度消费，必须在 return 前执行保证语义不受暂停影响）
        smc.vmdata.mission_data.pending_mon_num = this.spawnQueue.length;

        // 场上怪物超阈值时暂停推进：冻结 waveTime，恢复后欠账式瞬时补齐，30 秒预算不流失
        if (smc.mission.stop_spawn_mon) return;
        if (!this.isReleasing) return;

        this.waveTime += dt;

        // 清场加速：0.2s 节流检测当前段存活比例，清得快则快进推进时间（压缩垃圾时间）
        this.aliveCheckTimer += dt;
        if (this.aliveCheckTimer >= 0.2) {
            this.aliveCheckTimer = 0;
            this.checkEarlyAdvance();
        }

        // 欠账式补刷：期望累计刷出数 − 已刷数，自动补偿帧余量与暂停期间欠账
        let expected = this.expectedSpawned(this.waveTime);
        while (this.waveSpawnedCount < expected && this.spawnQueue.length > 0) {
            const monData = this.spawnQueue.shift()!;
            const targetPosIndex = this.waveSpawnedCount % MissionMonCompComp.MON_POSITIONS.length;
            this.addMonsterAtGrid(targetPosIndex, monData, this.currentWave);
            this.waveSpawnedCount++;
        }
        if (this.spawnQueue.length === 0) {
            this.isReleasing = false;
        }
    }

    start() { }

    private setupWaveData(monsters: GeneratedMonster[]) {
        // 按批次排序后整波入队，记录各批起始下标供速度曲线按批变速（batch 越大越靠后压轴）
        const sorted = monsters.slice().sort((a, b) => a.batch - b.batch);
        this.spawnQueue = sorted;
        const starts = [sorted.length, sorted.length, sorted.length];
        for (let i = 0; i < sorted.length; i++) {
            const b = Math.min(sorted[i].batch, 2);
            if (i < starts[b]) starts[b] = i;
        }
        // 空批起始下标前推到下一批起点（防 expectedSpawned 区间错乱）
        for (let b = 1; b >= 0; b--) {
            if (starts[b] === sorted.length) starts[b] = starts[b + 1];
        }
        this.batchStarts = starts;

        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] 回合 ${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回合。
     */
    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.spawnQueue = [];
        this.batchStarts = [0, 0, 0];
        this.waveTime = 0;
        this.isReleasing = false;
        this.batchReleasedCount = 0;
        this.batchFastForwarded = false;
        this.aliveCheckTimer = 0;
        this.waveEarlySkipTotal = 0;

        // 预生成第一回合数据以获取数量和 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");
    }

    // ======================== 回合管理 ========================

    /**
     * 开始下一回合：回合数 +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() {
        // 准备结束：清残留怪与计时，启动持续刷怪（队列已在 setupWaveData 整波入队，不能清）
        this.resetBattleTimer();
        this.isReleasing = true;
        this.waveTime = 0;
    }

    // ======================== 持续刷怪 ========================

    /**
     * 速度曲线：按 waveTime 所在时间段返回"到当前时刻应累计刷出的怪物数"。
     * 三段时间对应三批（铺垫 → 加压 → 高潮），批内匀速；m.batch 只影响排序，不再切断节奏。
     */
    private expectedSpawned(t: number): number {
        const total = this.waveTargetCount;
        if (total <= 0) return 0;
        const [s0, s1] = [this.batchStarts[0], this.batchStarts[1]];
        const s2 = this.batchStarts[2];
        const T1 = MissionMonCompComp.BATCH_T1;
        const T2 = MissionMonCompComp.BATCH_T2;
        if (t < T1) {
            const segTotal = s1 - s0;
            const segTime = T1;
            return s0 + Math.min(segTotal, Math.floor(t / segTime * segTotal));
        } else if (t < T2) {
            const segTotal = s2 - s1;
            const segTime = T2 - T1;
            return s1 + Math.min(segTotal, Math.floor((t - T1) / segTime * segTotal));
        } else {
            const segTotal = total - s2;
            const segTime = WAVE_DURATION - T2;
            return s2 + Math.min(segTotal, Math.floor((t - T2) / segTime * segTotal));
        }
    }

    /**
     * 清场加速检测：当前时间段已刷完且存活比例 ≤ BATCH_EARLY_RATIO 时，快进推进时间。
     * 只奖励"清得快"的 build（压缩垃圾时间），弱 build 清不完则不触发、不叠加压力。
     */
    private checkEarlyAdvance() {
        if (this.batchFastForwarded) return;
        if (this.spawnQueue.length === 0) return;
        // 当前时间段的 quota 是否已刷完：用 expectedSpawned 反推
        const expected = this.expectedSpawned(this.waveTime);
        if (this.waveSpawnedCount < expected) return;   // 本时间段还没放完，不判断
        if (this.batchReleasedCount <= 0) {
            this.batchReleasedCount = Math.max(1, expected);
        }

        let alive = 0;
        ecs.query(ecs.allOf(HeroAttrsComp)).forEach(e => {
            const a = e.get(HeroAttrsComp);
            if (a && a.fac === FacSet.MON && !a.is_dead) alive++;
        });
        // alive 含前几批残留，比例 clamp 防低估
        const aliveRatio = Math.min(1, alive / this.batchReleasedCount);
        if (aliveRatio <= MissionMonCompComp.BATCH_EARLY_RATIO) {
            this.batchFastForwarded = true;
            this.waveTime += MissionMonCompComp.BATCH_EARLY_SKIP;
            this.waveEarlySkipTotal += MissionMonCompComp.BATCH_EARLY_SKIP;
            smc.vmdata.mission_data.wave_early_skip = this.waveEarlySkipTotal;
            mLogger.log(this.debugMode, 'MissionMonComp',
                `[EarlyAdvance] waveTime=${this.waveTime.toFixed(1)} alive=${alive}/${this.batchReleasedCount}，快进 ${MissionMonCompComp.BATCH_EARLY_SKIP}s`);
        }
    }

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

    /**
     * 清理上一回合残留怪物，并重置战斗计时与清场加速状态。
     * 注意：spawnQueue / batchStarts / waveTargetCount 由 setupWaveData 在 Prepare 阶段写入，
     * 本函数不能触碰，否则 PhasePrepareEnd 会清空未刷队列导致回合直接判空。
     */
    private resetBattleTimer() {
        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;
        this.waveTime = 0;
        this.isReleasing = false;
        this.batchReleasedCount = 0;
        this.batchFastForwarded = false;
        this.aliveCheckTimer = 0;
        this.waveEarlySkipTotal = 0;
        smc.vmdata.mission_data.wave_early_skip = 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);

        // oops.message 全局事件总线：Boss 登场（震屏/音效由表现层消费）
        if (monData.isBoss) {
            oops.message.dispatchEvent(GameEvent.BossSpawn, { pos: spawnPos.clone() });
        }

        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() { }
}