import { MiniGamePf, type MiniGamePfId } from '../../../mx/tools/MiniGameHostInfo';
import { sdkConfig } from '../sdkConfig';

/** 小游戏平台标识（与 window 全局对象一一对应） */
type MiniGamePlatform = MiniGamePfId;

interface PlatformAdProfile {
    /** 创建实例后是否需主动 load（抖音/部分快游戏不会自动拉取） */
    manualLoadOnCreate: boolean;
    /** 关闭后是否主动 load 预载下一条（抖音官方建议下次直接 show） */
    preloadAfterClose: boolean;
    /** 全局单例，禁止频繁 destroy 重建 */
    singleton: boolean;
    /** 创建广告位 id 字段名（OPPO 旧版为 posId） */
    idField: 'adUnitId' | 'posId';
    /** 点击展示前埋点 sceneId（B 站要求） */
    reportSceneId?: number;
    /** 创建接口名。支付宝是 createRewardedAd，其余是 createRewardedVideoAd */
    createApi?: 'createRewardedVideoAd' | 'createRewardedAd';
    /** 必须 load 成功后再 show（支付宝未加载 show 返回 61101） */
    showAfterLoad?: boolean;
    /** 创建时宿主已自动拉取，等 onLoad，不要立刻再 load（vivo 激励视频） */
    waitAutoLoad?: boolean;
}

const PLATFORM_PROFILE: Record<MiniGamePlatform, PlatformAdProfile> = {
    // 微信/QQ：创建后自动拉取，关闭后自动更新；show 失败 → load → show
    wx: { manualLoadOnCreate: false, preloadAfterClose: true, singleton: true, idField: 'adUnitId' },
    qq: { manualLoadOnCreate: false, preloadAfterClose: true, singleton: true, idField: 'adUnitId' },
    // 抖音：须先 onLoad 再 load；关闭后可直接 show，不必每次 load
    tt: { manualLoadOnCreate: true, preloadAfterClose: false, singleton: true, idField: 'adUnitId' },
    // 快手：全局单例，无 load/onLoad，关闭后直接 show；create 可能返回 null
    ks: { manualLoadOnCreate: false, preloadAfterClose: false, singleton: true, idField: 'adUnitId' },
    // B 站：须 load → show；点击前 reportScene(1007)
    bl: { manualLoadOnCreate: true, preloadAfterClose: true, singleton: true, idField: 'adUnitId', reportSceneId: 1007 },
    // 快游戏（OPPO/vivo/华为等）：多数需手动 load；OPPO 旧 API 用 posId
    qg: { manualLoadOnCreate: true, preloadAfterClose: true, singleton: true, idField: 'posId' },
    // 支付宝：createRewardedAd；先 load 再 show；关闭后再 load。重复创建返回 61003，不 destroy
    my: {
        manualLoadOnCreate: true,
        preloadAfterClose: true,
        singleton: true,
        idField: 'adUnitId',
        createApi: 'createRewardedAd',
        showAfterLoad: true,
    },
};

const MAX_ERROR_RETRY = 5;

/** 激励视频广告（全平台统一封装） */
export class RewardedVideoAd {
    static keys: string[] = [];

    private static _platform: MiniGamePlatform | null = null;
    private static _pt: Record<string, unknown> | null = null;
    private static _ad: RewardedVideoAdInstance | null = null;
    private static _keyIndex = 0;
    private static _currentUnitId = '';

    private static _callback: ((ok: boolean) => void) | null = null;
    private static _errCount = 0;
    private static _waitShow = false;
    private static _showing = false;
    private static _loaded = false;
    /** vivo 首次 create 已自动拉取，为 false 时禁止再 load */
    private static _allowVivoLoad = false;
    /** vivo 失败后延迟 load 的定时器 */
    private static _vivoTimer = 0;

    private static _onLoadBound = () => RewardedVideoAd._onLoad();
    private static _onErrorBound = (err: unknown) => RewardedVideoAd._onError(err);
    private static _onCloseBound = (res: RewardedVideoCloseResult | undefined) => RewardedVideoAd._onClose(res);

    static init(keys: string[]): void {
        this.keys = keys?.filter(Boolean) ?? [];
        this._platform = this._detectPlatform();
        this._pt = this._resolvePlatformObject();
        if (!this._pt || this.keys.length === 0) return;
        this.ensureAdInstance();
        this.preload();
    }

    /** 应用回到前台：静默预载，避免后台久置后 show 失败 */
    static onAppShow(): void {
        if (this._showing || !this._pt || this.keys.length === 0) return;
        this.ensureAdInstance();
        this.preload();
    }

    /** 静默预载（不触发业务回调） */
    static preload(): void {
        if (!this._pt || this.keys.length === 0) return;
        if (this._profile()?.waitAutoLoad && (this._loaded || !this._allowVivoLoad)) return;
        this.ensureAdInstance();
        if (!this._ad?.load) return;
        try {
            const ret = this._ad.load();
            if (ret && typeof (ret as Promise<unknown>).catch === 'function') {
                (ret as Promise<unknown>).catch(() => { /* 预载失败等 onError */ });
            }
        } catch (e) {
            console.log('[RewardedVideoAd] preload failed', String(e));
        }
    }

    static show(callback?: (ok: boolean) => void): void {
        if (this._showing) {
            callback?.(false);
            return;
        }
        this._callback = callback ?? null;
        this._errCount = 0;

        if (!this._pt) {
            this._finish(true);
            return;
        }
        if (this.keys.length === 0) {
            this._finish(false);
            return;
        }

        this.ensureAdInstance();
        if (!this._ad) {
            this._finish(false);
            return;
        }

        this._reportSceneIfNeeded();
        this._showing = true;
        this._tryShow();
    }

    private static _detectPlatform(): MiniGamePlatform | null {
        return MiniGamePf.id();
    }

    private static _resolvePlatformObject(): Record<string, unknown> | null {
        const p = this._platform;
        if (!p) return null;
        return (window[p] as Record<string, unknown>) ?? null;
    }

    private static _profile(): PlatformAdProfile | null {
        if (this._platform === 'qg' && sdkConfig.config.chanId === 'vivo') {
            return {
                manualLoadOnCreate: false,
                preloadAfterClose: true,
                singleton: true,
                idField: 'posId',
                showAfterLoad: true,
                waitAutoLoad: true,
            };
        }
        return this._platform ? PLATFORM_PROFILE[this._platform] : null;
    }

    private static ensureAdInstance(): void {
        const pt = this._pt;
        const unitId = this.keys[this._keyIndex];
        if (!pt || !unitId) return;

        const createName = this._profile()?.createApi ?? 'createRewardedVideoAd';
        const createFn = pt[createName] as ((opts: Record<string, string>) => RewardedVideoAdInstance) | undefined;
        if (!createFn) {
            console.error('[RewardedVideoAd] ' + createName + ' not supported');
            return;
        }

        if (this._ad && this._currentUnitId === unitId) return;

        this._destroyAd();
        this._currentUnitId = unitId;
        this._loaded = false;
        this._waitShow = false;

        const param = this._buildCreateParam(unitId);
        try {
            this._ad = createFn(param) ?? null;
        } catch (e) {
            console.error('[RewardedVideoAd] create failed', unitId, String(e));
            this._ad = null;
            return;
        }
        if (!this._ad) {
            console.error('[RewardedVideoAd] create returned null', unitId);
            return;
        }

        this._ad.onLoad?.(this._onLoadBound);
        this._ad.onError?.(this._onErrorBound);
        this._ad.onClose?.(this._onCloseBound);

        if (this._profile()?.waitAutoLoad) this._allowVivoLoad = false;
        if (this._profile()?.manualLoadOnCreate) {
            this.preload();
        }
    }

    private static _buildCreateParam(unitId: string): Record<string, string> {
        const profile = this._profile();
        if (!profile) return { adUnitId: unitId };
        if (profile.idField === 'posId') {
            // 快游戏：OPPO 旧版 posId；华为/vivo 新版 adUnitId — 同时传入兼容
            return { posId: unitId, adUnitId: unitId };
        }
        return { adUnitId: unitId };
    }

    private static _destroyAd(): void {
        const ad = this._ad;
        if (!ad) return;
        ad.offLoad?.(this._onLoadBound);
        ad.offError?.(this._onErrorBound);
        ad.offClose?.(this._onCloseBound);
        // 快手全局单例、支付宝 61003：destroy 后再 create 会打坏后续展示
        if (ad.destroy && this._platform !== 'ks' && this._platform !== 'my') {
            try { ad.destroy(); } catch { /* ignore */ }
        }
        this._ad = null;
        this._loaded = false;
    }

    private static _switchToNextUnit(): boolean {
        const oldKey = this.keys[this._keyIndex];
        this._keyIndex = (this._keyIndex + 1) % this.keys.length;
        return oldKey !== this.keys[this._keyIndex];
    }

    private static _tryShow(): void {
        const ad = this._ad;
        if (!ad?.show) {
            this._showing = false;
            this._finish(false);
            return;
        }

        if (this._profile()?.showAfterLoad && !this._loaded) {
            this._waitShow = true;
            if (!this._profile()?.waitAutoLoad) this.preload();
            return;
        }

        const showPromise = ad.show();
        if (!showPromise || typeof showPromise.catch !== 'function') {
            return;
        }
        showPromise.catch((err: unknown) => {
            console.log('[RewardedVideoAd] show rejected, reload', String(err));
            this._waitShow = true;
            this._loaded = false;
            if (this._profile()?.waitAutoLoad) {
                this._allowVivoLoad = true;
                this._scheduleVivoReload();
                return;
            }
            this.preload();
        });
    }

    /** vivo 出错后隔 1 秒再 load，避开 30002 */
    private static _scheduleVivoReload(): void {
        if (this._vivoTimer) window.clearTimeout(this._vivoTimer);
        this._vivoTimer = window.setTimeout(this._vivoReload, 1000);
    }

    /** vivo 延迟 load */
    private static _vivoReload = (): void => {
        RewardedVideoAd._vivoTimer = 0;
        RewardedVideoAd.preload();
    };

    private static _onLoad(): void {
        this._loaded = true;
        this._allowVivoLoad = true;
        if (!this._waitShow || !this._showing) return;
        this._waitShow = false;
        this._tryShow();
    }

    private static _onError(err: unknown): void {
        const info = normalizeAdError(err);
        console.log('[RewardedVideoAd] onError', info.code, info.msg);
        this._loaded = false;
        this._errCount++;

        if (this._errCount >= MAX_ERROR_RETRY) {
            this._waitShow = false;
            this._showing = false;
            this._finish(false);
            return;
        }

        if (this._profile()?.waitAutoLoad) {
            const switched = this._switchToNextUnit();
            if (switched) this.ensureAdInstance();
            else {
                this._allowVivoLoad = true;
                this._scheduleVivoReload();
            }
            return;
        }

        if (this._switchToNextUnit()) {
            this.ensureAdInstance();
            if (this._waitShow) this.preload();
            else this.preload();
            return;
        }

        this.preload();
    }

    private static _onClose(res: RewardedVideoCloseResult | undefined): void {
        this._waitShow = false;
        this._showing = false;
        this._loaded = false;
        this._allowVivoLoad = true;

        const granted = isRewardGranted(res);
        this._finish(granted);

        if (this._profile()?.preloadAfterClose) {
            this.preload();
        }
    }

    private static _reportSceneIfNeeded(): void {
        const sceneId = this._profile()?.reportSceneId;
        if (!sceneId || !this._platform) return;
        const pf = window[this._platform] as { reportScene?: (opts: { sceneId: number }) => void } | undefined;
        try {
            pf?.reportScene?.({ sceneId });
        } catch (e) {
            console.log('[RewardedVideoAd] reportScene failed', String(e));
        }
    }

    private static _finish(ok: boolean): void {
        const cb = this._callback;
        this._callback = null;
        cb?.(ok);
    }
}

/** 是否完整观看（兼容各平台基础库差异） */
function isRewardGranted(res: RewardedVideoCloseResult | undefined): boolean {
    if (res === undefined || res === null) {
        // 微信/QQ/快手：基础库 < 2.1.0 无 isEnded，官方示例视为可发奖
        return true;
    }
    if (typeof res.isEnded === 'boolean') {
        return res.isEnded;
    }
    // 微信 3.7.7+ 兜底分享页关闭时仍带 isEnded
    return false;
}

function normalizeAdError(err: unknown): { code: number | string; msg: string } {
    if (err && typeof err === 'object') {
        const o = err as { errCode?: number; errMsg?: string; code?: number; message?: string; error?: number; errorMessage?: string };
        return {
            code: o.errCode ?? o.error ?? o.code ?? 'unknown',
            msg: o.errMsg ?? o.errorMessage ?? o.message ?? JSON.stringify(err),
        };
    }
    return { code: 'unknown', msg: String(err ?? '') };
}

interface RewardedVideoCloseResult {
    isEnded?: boolean;
    useFallbackSharePage?: boolean;
}

interface RewardedVideoAdInstance {
    show(): Promise<void>;
    load?(): Promise<void> | void;
    destroy?(): void;
    onLoad?(cb: () => void): void;
    offLoad?(cb: () => void): void;
    onError?(cb: (err: unknown) => void): void;
    offError?(cb: (err: unknown) => void): void;
    onClose?(cb: (res: RewardedVideoCloseResult | undefined) => void): void;
    offClose?(cb: (res: RewardedVideoCloseResult | undefined) => void): void;
}