/**
 * OmniCard AI (CRMmp) - 名片主参展分享码海报业务驱动层
 * 解析 slug / id，拉取公开短链二维码，复制链接，保存海报到相册
 */

import { fetchCardQrcodeSvg } from '../../../common/api.uts';
import {
  getCurrentLocale,
  getOmniText,
  OmniLocale,
} from '../../../common/locale.uts';

export type QrcodeQuery = {
  slug?: string;
  id?: string;
};

export type CardQrcodePoster = {
  svg: string;
  url: string;
};

export type LoadPosterApi = {
  fetchCardQrcodeSvg: (slugOrId: string) => Promise<CardQrcodePoster>;
};

export type LoadPosterResult = {
  svg: string;
  url: string;
  empty: boolean;
  errorMessage: string;
};

export type QrcodeState = {
  slugOrId: string;
  svg: string;
  url: string;
  loading: boolean;
  empty: boolean;
  errorMessage: string;
};

export type QrcodeCopyKey =
  | 'copyCta'
  | 'generated'
  | 'urlLabel'
  | 'empty'
  | 'error'
  | 'loading'
  | 'title'
  | 'saveSuccess'
  | 'saveFailed'
  | 'saveUnavailable';

const QRCODE_COPY: Record<OmniLocale, Record<QrcodeCopyKey, string>> = {
  'zh-CN': {
    title: '分享名片',
    copyCta: '复制链接',
    generated: '二维码已生成',
    urlLabel: '短链',
    empty: '暂无数据',
    error: '出错了',
    loading: '加载中...',
    saveSuccess: '已保存到相册',
    saveFailed: '保存失败',
    saveUnavailable: '暂无可保存的图片',
  },
  'en-US': {
    title: 'Share Card',
    copyCta: 'Copy link',
    generated: 'QR code ready',
    urlLabel: 'Short link',
    empty: 'Nothing here yet',
    error: 'Something went wrong',
    loading: 'Loading...',
    saveSuccess: 'Saved to Photos',
    saveFailed: 'Could not save',
    saveUnavailable: 'No image to save',
  },
  'ar-SA': {
    title: 'مشاركة البطاقة',
    copyCta: 'نسخ الرابط',
    generated: 'رمز الاستجابة جاهز',
    urlLabel: 'الرابط المختصر',
    empty: 'لا توجد بيانات بعد',
    error: 'حدث خطأ',
    loading: 'جار التحميل...',
    saveSuccess: 'تم الحفظ في الصور',
    saveFailed: 'تعذر الحفظ',
    saveUnavailable: 'لا توجد صورة للحفظ',
  },
  'es-ES': {
    title: 'Compartir tarjeta',
    copyCta: 'Copiar enlace',
    generated: 'Codigo QR listo',
    urlLabel: 'Enlace corto',
    empty: 'Aun no hay datos',
    error: 'Algo salio mal',
    loading: 'Cargando...',
    saveSuccess: 'Guardado en Fotos',
    saveFailed: 'No se pudo guardar',
    saveUnavailable: 'No hay imagen para guardar',
  },
  'de-DE': {
    title: 'Karte teilen',
    copyCta: 'Link kopieren',
    generated: 'QR-Code bereit',
    urlLabel: 'Kurzlink',
    empty: 'Noch keine Daten',
    error: 'Etwas ist schiefgelaufen',
    loading: 'Wird geladen...',
    saveSuccess: 'In Fotos gespeichert',
    saveFailed: 'Speichern fehlgeschlagen',
    saveUnavailable: 'Kein Bild zum Speichern',
  },
  'fr-FR': {
    title: 'Partager la carte',
    copyCta: 'Copier le lien',
    generated: 'QR code pret',
    urlLabel: 'Lien court',
    empty: 'Aucune donnee',
    error: 'Une erreur est survenue',
    loading: 'Chargement...',
    saveSuccess: 'Enregistre dans Photos',
    saveFailed: 'Echec de l enregistrement',
    saveUnavailable: 'Aucune image a enregistrer',
  },
  'ja-JP': {
    title: '名刺をシェア',
    copyCta: 'リンクをコピー',
    generated: 'QRコードを生成しました',
    urlLabel: 'ショートリンク',
    empty: 'データがありません',
    error: 'エラーが発生しました',
    loading: '読み込み中...',
    saveSuccess: '写真に保存しました',
    saveFailed: '保存に失敗しました',
    saveUnavailable: '保存できる画像がありません',
  },
};

function trimText(value: string | number | null | undefined): string {
  if (value == null) {
    return '';
  }
  return String(value).trim();
}

/**
 * 页面文案：能复用 locale.uts 的走词典，其余走本地七语表
 */
export function resolveQrcodeText(key: QrcodeCopyKey): string {
  if (key === 'title') {
    return getOmniText(getCurrentLocale(), 'card.share');
  }
  if (key === 'empty') {
    return getOmniText(getCurrentLocale(), 'common.empty');
  }
  if (key === 'error') {
    return getOmniText(getCurrentLocale(), 'common.error');
  }
  if (key === 'loading') {
    return getOmniText(getCurrentLocale(), 'common.loading');
  }
  const locale = getCurrentLocale();
  const bag = QRCODE_COPY[locale] != null ? QRCODE_COPY[locale] : QRCODE_COPY['en-US'];
  return bag[key];
}

/**
 * 路由查询优先 slug，否则 id
 */
export function resolveSlugOrId(query: QrcodeQuery | null | undefined): string {
  if (query == null) {
    return '';
  }
  const slug = trimText(query.slug);
  if (slug !== '') {
    return slug;
  }
  return trimText(query.id);
}

function resolvePosterApi(api?: LoadPosterApi): LoadPosterApi {
  if (api != null) {
    return api;
  }
  return {
    fetchCardQrcodeSvg,
  };
}

export function createQrcodeState(): QrcodeState {
  return {
    slugOrId: '',
    svg: '',
    url: '',
    loading: false,
    empty: false,
    errorMessage: '',
  };
}

/**
 * 拉取公开 SVG 海报：可注入 fetchCardQrcodeSvg
 */
export async function loadPoster(
  slugOrId: string | null | undefined,
  api?: LoadPosterApi
): Promise<LoadPosterResult> {
  const key = trimText(slugOrId);
  if (key === '') {
    return {
      svg: '',
      url: '',
      empty: true,
      errorMessage: '',
    };
  }

  try {
    const poster = await resolvePosterApi(api).fetchCardQrcodeSvg(key);
    const svg = poster != null && poster.svg != null ? String(poster.svg) : '';
    const url = poster != null && poster.url != null ? String(poster.url) : '';
    return {
      svg,
      url,
      empty: svg === '' && url === '',
      errorMessage: '',
    };
  } catch (err) {
    const message =
      err instanceof Error
        ? err.message
        : getOmniText(getCurrentLocale(), 'common.error');
    return {
      svg: '',
      url: '',
      empty: false,
      errorMessage: message,
    };
  }
}

export async function loadPosterIntoState(
  state: QrcodeState,
  slugOrId: string | null | undefined,
  api?: LoadPosterApi
): Promise<LoadPosterResult> {
  state.slugOrId = trimText(slugOrId);
  state.loading = true;
  state.errorMessage = '';
  const result = await loadPoster(state.slugOrId, api);
  state.svg = result.svg;
  state.url = result.url;
  state.empty = result.empty;
  state.errorMessage = result.errorMessage;
  state.loading = false;
  return result;
}

export function applyQrcodeOptions(
  state: QrcodeState,
  options: QrcodeQuery | null | undefined
): string {
  const slugOrId = resolveSlugOrId(options);
  state.slugOrId = slugOrId;
  return slugOrId;
}

/**
 * 主 CTA：复制短链
 */
export function copyPosterUrl(url: string | null | undefined): boolean {
  const text = trimText(url);
  if (text === '') {
    return false;
  }

  uni.setClipboardData({
    data: text,
    success: () => {
      uni.showToast({
        title: getOmniText(getCurrentLocale(), 'portal.copied_link'),
        icon: 'none',
      });
    },
  });
  return true;
}

/**
 * 仅本地路径 / 网络图 / data:image 可入库；纯 SVG 标记不可直接进相册
 */
export function isSaveablePosterImage(source: string | null | undefined): boolean {
  const text = trimText(source);
  if (text === '') {
    return false;
  }
  const lower = text.toLowerCase();
  if (lower.indexOf('<svg') >= 0 || lower.indexOf('<?xml') === 0) {
    return false;
  }
  if (
    lower.indexOf('http://') === 0 ||
    lower.indexOf('https://') === 0 ||
    lower.indexOf('data:image') === 0
  ) {
    return true;
  }
  return true;
}

function toastSaveFailed(unavailable: boolean): void {
  if (unavailable) {
    uni.showToast({
      title: resolveQrcodeText('saveUnavailable'),
      icon: 'none',
    });
    return;
  }
  uni.showToast({
    title: resolveQrcodeText('saveFailed'),
    icon: 'none',
  });
}

function invokeSaveImageToPhotosAlbum(filePath: string): Promise<boolean> {
  return new Promise<boolean>(resolve => {
    uni.saveImageToPhotosAlbum({
      filePath: filePath,
      success: () => {
        uni.showToast({
          title: resolveQrcodeText('saveSuccess'),
          icon: 'none',
        });
        resolve(true);
      },
      fail: (_err: unknown) => {
        toastSaveFailed(false);
        resolve(false);
      },
    });
  });
}

function downloadRemoteImage(url: string): Promise<string> {
  return new Promise<string>(resolve => {
    uni.downloadFile({
      url: url,
      success: (res: { statusCode?: number; tempFilePath?: string }) => {
        const path =
          res != null && res.tempFilePath != null
            ? String(res.tempFilePath).trim()
            : '';
        const code = res != null && res.statusCode != null ? res.statusCode : 0;
        if (code === 200 && path !== '') {
          resolve(path);
          return;
        }
        resolve('');
      },
      fail: (_err: unknown) => {
        resolve('');
      },
    });
  });
}

/**
 * 保存海报到相册：必须等 uni.saveImageToPhotosAlbum 成功才 toast 已保存
 */
export async function savePosterToAlbum(
  imageSource: string | null | undefined
): Promise<boolean> {
  const source = trimText(imageSource);
  if (source === '' || !isSaveablePosterImage(source)) {
    toastSaveFailed(true);
    return false;
  }

  let filePath = source;
  const lower = source.toLowerCase();
  if (lower.indexOf('http://') === 0 || lower.indexOf('https://') === 0) {
    filePath = await downloadRemoteImage(source);
    if (filePath === '') {
      toastSaveFailed(false);
      return false;
    }
  }

  return invokeSaveImageToPhotosAlbum(filePath);
}