import { _decorator, Node, sp } from 'cc';
import type { EntityId } from 'db://assets/mx/module/battle';
import { GBundle } from '../../game/ConfigRes';
import type { SkillPresentationContext } from '../skill/SkillPresentationTypes';
import { SkillPresentationEnv } from '../skill/SkillPresentationEnv';
import { computeAimAngleDeg, SkillTransformDriver } from '../skill/SkillTransformDriver';
import { worldPointAtAimAngle } from '../skill/SkillParentAim';
import { PRES_HIT_AT_BASE } from '../presentation/SkillVisualChannel';
import { HeroSkin } from '../view/HeroSkin';
import { BattleSpinePlayback } from '../presentation/BattleSpinePlayback';
import { HeroActor } from './HeroActor';

const { ccclass } = _decorator;

/** battleHero/prefab/skill/英雄枪-攻击 */
const ATK_PREFAB = '英雄枪-攻击';
const ATK_PREFAB_PATH = 'prefab/skill/';
/** 攻效节点名 */
const NODE_ANIM = 'anim';
/** 攻效攻击段 */
const SPINE_ATK_FX = '攻击2';
/** 攻效定格后：1 秒内没有下一刀则回文字待机 */
const HOLD_WINDOW_SEC = 1;
/** 攻击2 完成回调丢失后的收招宽限（逻辑秒） */
const ATK_COMPLETE_SLACK_SEC = 0.05;
/** 预制体默认朝向（无目标时 fallback） */
const ATK_REST_ANGLE = 0;
/** 瞄准 / 收招插值秒（与武器枪一致） */
const AIM_BLEND_SEC = 0.2;
/** 连击瞄准更短，减少从末帧拧到新目标的等待 */
const COMBO_AIM_BLEND_SEC = 0.1;

type QiangPhase = 'idle' | 'aiming' | 'attacking' | 'engaged' | 'returning';

/**
 * 枪：HeroActor 壳；普攻/技能共用「英雄枪-攻击」（播攻击2、瞄准目标）。
 * 攻击2 播完定格末帧，开 1 秒连击窗（与弓一致）；窗内无下一刀再插值回文字待机。
 * 能否出手只由逻辑层 tryCast 决定。
 */
@ccclass('Qiang')
export class Qiang extends HeroActor {

    private _atkRoot: Node | null = null;
    private _atkAnim: sp.Skeleton | null = null;
    private _phase: QiangPhase = 'idle';
    /** 连击窗计时序号 */
    private _holdTimerSeq = 0;
    /** 攻击2 收招监视序号 */
    private _atkWatchSeq = 0;
    /** 瞄准/收招插值世代 */
    private _aimSeq = 0;
    /** 瞄准中的施法 ctx：beginPresentationCast 前若被 abort，必须 finish，否则逻辑锁永久卡住 */
    private _aimingCtx: SkillPresentationContext | null = null;

    detachPooledFx(): void {
        this._disposeAtk();
        super.detachPooledFx();
    }

    onIdle(): void {
        // 攻击/连击定格中：禁止字形收招把 1 秒窗踩掉
        if (this._phase === 'attacking' || this._phase === 'engaged') return;
        // idle / aiming / returning：都要能收干净（拖动 abort、插值被取消）
        this._forceIdleVisual();
    }

    abortPresentation(): void {
        this._forceIdleVisual();
        super.abortPresentation();
        if (this.isValid && this.isActive) super.onIdle();
    }

    isPresentationBusy(): boolean {
        return this._phase !== 'idle' || super.isPresentationBusy();
    }

    /** 立刻收攻效并回字形待机（拖动打断 / 插值被取消时的兜底） */
    private _forceIdleVisual(): void {
        this._cancelHoldTimer();
        this._cancelAtkWatch();
        this._cancelAimTween();
        const aiming = this._aimingCtx;
        this._aimingCtx = null;
        this._phase = 'idle';
        this._hideAtk();
        // 瞄准中的 ctx 从未进 _presCtx，这里必须结算，否则 OnTick 永远等表现结束 → 不再攻击
        if (aiming?.isAlive) aiming.finish();
        this.abortPresentationCast();
        if (this.isValid) super.onIdle();
    }

    /** skillId Presenter：普攻与技能同一套攻效 */
    presentNormAttack(ctx: SkillPresentationContext): void {
        this._presentQiangFx(ctx);
    }

    /** 主动技能与普攻共用预制体（预留入口） */
    presentSkill(ctx: SkillPresentationContext): void {
        this._presentQiangFx(ctx);
    }

    private _presentQiangFx(ctx: SkillPresentationContext): void {
        if (!ctx.isAlive || !this.isValid || !this.node?.isValid) {
            ctx.finish();
            return;
        }
        // 连击：攻效仍在末帧定格，禁止 setToSetupPose（会弹到 setup，像翻到枪字另一侧）
        const isCombo = this._phase === 'engaged';
        this._cancelHoldTimer();
        this._cancelAtkWatch();
        this._cancelAimTween();
        this._bindChannel();
        this._ensureAtk();
        this.syncAtkFxSkin(this._atkAnim);
        this._phase = 'aiming';
        this._aimingCtx = ctx;
        this._showAtk();
        if (!isCombo && this._atkAnim?.isValid) {
            // 首刀/非连击：瞄准期间停在 setup，避免预制体默认动画抢播
            BattleSpinePlayback.resetTracks(this._atkAnim);
            this._atkAnim.setToSetupPose();
            this._atkAnim.timeScale = 0;
        }
        const aspd = Math.max(0.01, SkillPresentationEnv.getFinalAttackSpeed(ctx.caster));
        const aimSec = isCombo ? COMBO_AIM_BLEND_SEC : AIM_BLEND_SEC;
        this._aimAtkRoot(ctx.targets[0] ?? null, aimSec, aspd, () => {
            this._aimingCtx = null;
            if (!this.isValid || this._phase !== 'aiming') {
                // 瞄准被 abort/force-idle 抢走：ctx 已在 _forceIdleVisual 结算
                return;
            }
            this._showAtk();
            this._phase = 'attacking';
            const seq = this.beginPresentationCast(ctx);
            const castAspd = this.visualChannel.playCastAnim({
                caster: ctx.caster,
                animation: String(ctx.params.animation ?? ''),
                followWeapon: false,
                primaryTarget: ctx.targets[0] ?? null,
                onAnimComplete: this.onPresentationAnimCompleteBound,
            });
            if (this._atkAnim?.isValid) {
                BattleSpinePlayback.resetTracks(this._atkAnim);
                this.playSpine(this._atkAnim, SPINE_ATK_FX, this._onAtkFxCompleteBound, castAspd, false);
                const dur = BattleSpinePlayback.getAnimDuration(this._atkAnim, SPINE_ATK_FX);
                if (dur != null) {
                    this._scheduleAtkWatch(dur / Math.max(0.01, castAspd) + ATK_COMPLETE_SLACK_SEC);
                }
            } else {
                console.log('[Qiang] 攻效预制体未加载', ATK_PREFAB);
                this._enterHold();
            }
            this.schedulePresentationCast(seq, PRES_HIT_AT_BASE / Math.max(0.01, castAspd));
        });
    }

    /** 攻击2 播完：定格末帧并开 1 秒连击窗（与弓一致；勿因字形已收招而跳过） */
    private readonly _onAtkFxCompleteBound = (): void => {
        if (!this.isValid || this._phase !== 'attacking') return;
        this._cancelAtkWatch();
        this._enterHold();
    };

    /** 攻击2 完成回调未到时强制走同一收招 */
    private _onAtkWatchExpired(seq: number): void {
        if (seq !== this._atkWatchSeq) return;
        if (!this.isValid || this.isPresentationTeardown() || this._phase !== 'attacking') return;
        console.warn('[Qiang] 攻击2 完成回调未到，强制收招');
        this._onAtkFxCompleteBound();
    }

    /** 攻击2 停在末帧（攻效「攻击待机」时长为 0，再播会把后续攻击2 播不出来） */
    private _enterHold(): void {
        this._phase = 'engaged';
        if (this._atkAnim?.isValid) {
            this._showAtk();
            BattleSpinePlayback.clearPendingComplete(this._atkAnim);
            this._atkAnim.timeScale = 0;
        }
        this._scheduleHoldReturn();
    }

    /** 1 秒后收招；下一刀会作废本次序号 */
    private _scheduleHoldReturn(): void {
        const seq = ++this._holdTimerSeq;
        this.schedulePresentation(() => {
            if (seq !== this._holdTimerSeq) return;
            if (!this.isValid || this.isPresentationTeardown()) return;
            this._onHoldWindowExpired();
        }, HOLD_WINDOW_SEC);
    }

    /**
     * 攻击2 应在 delay 内结束；超时仍 attacking 则强制收招。
     * @param delaySec 逻辑秒
     */
    private _scheduleAtkWatch(delaySec: number): void {
        const seq = ++this._atkWatchSeq;
        this.schedulePresentation(() => {
            if (seq !== this._atkWatchSeq) return;
            this._onAtkWatchExpired(seq);
        }, delaySec);
    }

    /** 收招窗到点：本窗内没有下一刀则回文字待机 */
    private _onHoldWindowExpired(): void {
        if (!this.isValid || this.isPresentationTeardown() || this._phase !== 'engaged') return;
        this._restoreFullIdle();
    }

    /** 藏攻效，字形回待机；攻效仍显示时先插值拧回休息角 */
    private _restoreFullIdle(): void {
        this._cancelHoldTimer();
        this._cancelAtkWatch();
        if (this._phase === 'idle' || this._phase === 'returning') return;

        const atk = this._atkRoot;
        if (!atk?.isValid || !atk.active) {
            this._forceIdleVisual();
            return;
        }

        this._phase = 'returning';
        this._cancelAimTween();
        const seq = ++this._aimSeq;
        SkillTransformDriver.animate({
            node: atk,
            duration: AIM_BLEND_SEC,
            fromAngle: atk.angle,
            toAngle: ATK_REST_ANGLE,
            easing: SkillTransformDriver.easeSineInOut,
            onComplete: () => {
                if (!this.isValid || seq !== this._aimSeq) return;
                if (this._phase !== 'returning') return;
                this._phase = 'idle';
                this._hideAtk();
                super.onIdle();
            },
        });
        // 拖动/节点失效时 SkillTransformDriver 丢弃动画且不回调 → 必须兜底，否则字形永久不显示
        this.schedulePresentation(() => {
            if (!this.isValid || seq !== this._aimSeq) return;
            if (this._phase !== 'returning') return;
            this._forceIdleVisual();
        }, AIM_BLEND_SEC + 0.05);
    }

    /** 作废未触发的连击窗计时 */
    private _cancelHoldTimer(): void {
        this._holdTimerSeq++;
    }

    /** 作废未触发的攻击2 收招监视 */
    private _cancelAtkWatch(): void {
        this._atkWatchSeq++;
    }

    private _cancelAimTween(): void {
        this._aimSeq++;
        if (this._atkRoot?.isValid) SkillTransformDriver.cancelNode(this._atkRoot);
    }

    /**
     * 旋转「英雄枪-攻击」根节点插值朝向主目标。
     * @param primaryTarget 主目标
     * @param aimSec 插值时长（秒 @ 攻速=1）
     * @param aspd 攻速系数
     * @param onReady 转到瞄准角后起播攻击2
     */
    private _aimAtkRoot(primaryTarget: EntityId | null, aimSec: number, aspd: number, onReady: () => void): void {
        const atk = this._atkRoot;
        if (!atk?.isValid) {
            onReady();
            return;
        }
        let targetWorld = primaryTarget != null
            ? SkillPresentationEnv.getTargetWorldPos(primaryTarget)
            : null;
        const pivotWorld = atk.worldPosition.clone();
        if (!targetWorld) {
            targetWorld = worldPointAtAimAngle(pivotWorld, ATK_REST_ANGLE, 200);
        }
        const aim = computeAimAngleDeg(pivotWorld, targetWorld);
        if (aim == null) {
            onReady();
            return;
        }
        this._cancelAimTween();
        const seq = ++this._aimSeq;
        SkillTransformDriver.animate({
            node: atk,
            duration: Math.max(0.01, aimSec / aspd),
            fromAngle: atk.angle,
            toAngle: aim,
            easing: SkillTransformDriver.easeSineInOut,
            onComplete: () => {
                if (seq !== this._aimSeq) return;
                onReady();
            },
        });
    }

    private _ensureAtk(): void {
        if (!this._atkRoot?.isValid) {
            const atk = gg.res.getNode(ATK_PREFAB_PATH, ATK_PREFAB, GBundle.BattleHero);
            if (!atk?.isValid) {
                this._atkRoot = null;
                this._atkAnim = null;
                return;
            }
            this._atkRoot = atk;
        }
        this._attachAtk();
        const animNode = this._atkRoot.getChildByName(NODE_ANIM);
        this._atkAnim = animNode?.getComponent(sp.Skeleton) ?? null;
        if (!this._atkAnim?.isValid) {
            console.log('[Qiang] 攻效缺少节点', NODE_ANIM);
        }
    }

    /** 挂在英雄展示根上，与「动画」同级 */
    private _attachAtk(): void {
        const atk = this._atkRoot;
        if (!atk?.isValid) return;
        if (!this._heroSkin) {
            this._heroSkin = this.node.getComponent(HeroSkin);
        }
        const display = this._heroSkin?.displayNode;
        const parent = display?.isValid ? display : this.node;
        if (atk.parent !== parent) {
            atk.parent = parent;
        }
        atk.setPosition(0, 0, 0);
    }

    private _showAtk(): void {
        if (this._atkRoot?.isValid) this._atkRoot.active = true;
    }

    private _hideAtk(): void {
        if (this._atkAnim?.isValid) {
            BattleSpinePlayback.clearPendingComplete(this._atkAnim);
            this._atkAnim.timeScale = 1;
        }
        if (this._atkRoot?.isValid) {
            this._atkRoot.active = false;
            this._atkRoot.angle = ATK_REST_ANGLE;
        }
    }

    private _disposeAtk(): void {
        this._cancelHoldTimer();
        this._cancelAtkWatch();
        this._cancelAimTween();
        const aiming = this._aimingCtx;
        this._aimingCtx = null;
        if (aiming?.isAlive) aiming.finish();
        this._phase = 'idle';
        this._hideAtk();
        if (this._atkRoot?.isValid) {
            gg.res.putNode(this._atkRoot);
        }
        this._atkRoot = null;
        this._atkAnim = null;
    }
}