import { Node, UITransform, Vec3, sp } from 'cc';
import { MergeEventType, type MergeEvent } from 'db://assets/mx/module/merge';
import type { BattleBagSession } from '../../battle/bag/BattleBagSession';
import { BattleSpinePlayback } from '../../battle/presentation/BattleSpinePlayback';
import { RankDataManager } from '../../manager/RankDataManager';

/** 引导手指 Spine 动画 */
const FINGER_ANIM = '点击';
/** 步骤节点父名 */
const STEPS_NODE = 'steps';
/** 第一步：点召唤 */
const STEP_SUMMON = '2';
/** 第二步：拖字上阵 */
const STEP_DRAG = '3';
/** 手指节点名 */
const FINGER_NODE = '引导手指';

/**
 * 新玩家首次进战弱引导：点召唤 → 拖字上阵。
 * 手指对齐召唤按钮世界坐标，避免预制体旧坐标偏移。
 */
export class BattleFirstGuidePresenter {
    /** 引导根 */
    private _root: Node | null = null;
    /** 点召唤文案 */
    private _stepSummon: Node | null = null;
    /** 拖字文案 */
    private _stepDrag: Node | null = null;
    /** 手指 */
    private _finger: Node | null = null;
    /** 手指 Spine */
    private _fingerSk: sp.Skeleton | null = null;
    /** 召唤按钮（对齐目标） */
    private _summonBtn: Node | null = null;
    /** 本机背包 */
    private _bag: BattleBagSession | null = null;
    /** 当前步：0 未开 / 2 点召唤 / 3 拖字 */
    private _step = 0;
    /** 复用世界坐标，避免每帧 new */
    private readonly _alignWorld = new Vec3();

    /**
     * 绑定并按存档决定是否展示第一步。
     * @param root ui_guide
     * @param bag 本机背包会话
     * @param summonBtn 召唤按钮（btnRefresh）
     */
    bind(root: Node | null, bag: BattleBagSession | null, summonBtn?: Node | null): void {
        this.unbind();
        if (!root?.isValid) {
            console.error('[BattleFirstGuide] ui_guide 缺失');
            return;
        }
        root.active = false;
        if (!RankDataManager.shouldShowFirstBattleGuide()) return;
        const steps = root.getChildByName(STEPS_NODE);
        this._stepSummon = steps?.getChildByName(STEP_SUMMON) ?? null;
        this._stepDrag = steps?.getChildByName(STEP_DRAG) ?? null;
        this._finger = root.getChildByName(FINGER_NODE) ?? null;
        this._fingerSk = this._finger?.getComponent(sp.Skeleton) ?? null;
        if (!this._stepSummon?.isValid || !this._stepDrag?.isValid || !this._finger?.isValid) {
            console.error('[BattleFirstGuide] ui_guide 子节点缺失');
            return;
        }
        if (!bag) {
            console.error('[BattleFirstGuide] bagSession 未就绪');
            return;
        }
        if (!summonBtn?.isValid) {
            console.warn('[BattleFirstGuide] 召唤按钮缺失，手指可能错位');
        }
        this._root = root;
        this._bag = bag;
        this._summonBtn = summonBtn?.isValid ? summonBtn : null;
        this._bag.on(MergeEventType.TilePlaced, this._onPlayerDrag);
        this._bag.on(MergeEventType.TileMoved, this._onPlayerDrag);
        this._showSummon();
    }

    /** Widget 布局后再对齐一次（由界面 scheduleOnce 调用） */
    realignFinger(): void {
        if (this._step !== 2) return;
        this._alignFingerToSummon();
    }

    /** 召唤刷新成功：藏手指，切到拖字提示 */
    onSummonOk(): void {
        if (this._step !== 2) return;
        this._showDrag();

        const curWaveNum = gg.game.CurentBattle.CurentWaveNum;
        gg.sdk.reportDY('inLevel', `${gg.game.getReportDYBattleCountLabel(curWaveNum)}-新手引导1点召唤`);
    }

    /** 停动画、解监听、藏根 */
    unbind(): void {
        if (this._bag) {
            this._bag.off(MergeEventType.TilePlaced, this._onPlayerDrag);
            this._bag.off(MergeEventType.TileMoved, this._onPlayerDrag);
        }
        this._stopFinger();
        if (this._root?.isValid) this._root.active = false;
        this._root = null;
        this._stepSummon = null;
        this._stepDrag = null;
        this._finger = null;
        this._fingerSk = null;
        this._summonBtn = null;
        this._bag = null;
        this._step = 0;
    }

    /** 第一步：手指点召唤 + 文案 2 */
    private _showSummon(): void {
        const root = this._root;
        if (!root?.isValid) return;
        this._step = 2;
        root.active = true;
        if (this._stepSummon) this._stepSummon.active = true;
        if (this._stepDrag) this._stepDrag.active = false;
        if (this._finger) this._finger.active = true;
        this._alignFingerToSummon();
        this._playFinger();
    }

    /** 将手指对齐到召唤按钮中心（不拦截点击，否则会挡住召唤） */
    private _alignFingerToSummon(): void {
        const finger = this._finger;
        const btn = this._summonBtn;
        if (!finger?.isValid || !btn?.isValid) return;
        btn.getWorldPosition(this._alignWorld);
        const put = finger.parent?.getComponent(UITransform);
        if (!put) {
            finger.setWorldPosition(this._alignWorld);
        } else {
            const local = put.convertToNodeSpaceAR(this._alignWorld);
            finger.setPosition(local.x, local.y, 0);
        }
        // Spine 仍绘制；命中盒清零，触摸落到下方 btnRefresh
        const fut = finger.getComponent(UITransform);
        if (fut) fut.setContentSize(0, 0);
    }

    /** 第二步：只留拖字文案 */
    private _showDrag(): void {
        this._step = 3;
        if (this._stepSummon) this._stepSummon.active = false;
        if (this._stepDrag) this._stepDrag.active = true;
        this._stopFinger();
        if (this._finger) this._finger.active = false;
    }

    /** 玩家拖到地图：结束引导 */
    private readonly _onPlayerDrag = (_event: MergeEvent): void => {
        if (this._step !== 3) return;
        RankDataManager.markFirstBattleGuideDone();
        this.unbind();

        const curWaveNum = gg.game.CurentBattle.CurentWaveNum;
        gg.sdk.reportDY('inLevel', `${gg.game.getReportDYBattleCountLabel(curWaveNum)}-新手引导2拖字上阵`);
    };

    /** 循环播手指点击 */
    private _playFinger(): void {
        const sk = this._fingerSk;
        if (!sk?.isValid) {
            console.error('[BattleFirstGuide] 引导手指缺少 Spine');
            return;
        }
        BattleSpinePlayback.play(sk, FINGER_ANIM, { loop: true });
    }

    /** 停手指 Spine */
    private _stopFinger(): void {
        const sk = this._fingerSk;
        if (!sk?.isValid) return;
        BattleSpinePlayback.clearPendingComplete(sk);
        BattleSpinePlayback.resetTracks(sk);
    }
}