/**
 * OmniCard AI (CRMmp) - 名片主 NFC 贴卡激活业务驱动层
 * H5 无天线走手动 UID；APP startScan 为占位，调不到原生 NFC 时回退手动输入
 */

import { NFCRecord } from '../../../common/types.uts';
import { bindNfcDevice, activateNfcDevice } from '../../../common/api.uts';
import { getCurrentLocale, getOmniText } from '../../../common/locale.uts';

export type ScanCopyKey =
  | 'title'
  | 'desc'
  | 'uidLabel'
  | 'uidPlaceholder'
  | 'cardIdLabel'
  | 'cardIdPlaceholder'
  | 'cta'
  | 'empty'
  | 'uidRequired'
  | 'cardIdRequired'
  | 'nfcUnavailable'
  | 'success'
  | 'error'
  | 'retry';

export type ScanState = {
  uid: string;
  cardIdRaw: string;
  deviceCardId: number | null;
  submitting: boolean;
  scanning: boolean;
  manualInput: boolean;
  errorMessage: string;
  empty: boolean;
  record: NFCRecord | null;
};

export type ScanPageOptions = {
  cardId?: string;
  uid?: string;
  id?: string;
};

export type ActivateByTapInput = {
  uid: string;
  cardId?: string | number | null;
  deviceCardId?: string | number | null;
};

function isZhLocale(): boolean {
  return getCurrentLocale() === 'zh-CN';
}

/**
 * 页面文案：能复用 locale.uts 的走词典，缺 key 时中英本地词典
 */
export function resolveScanText(key: ScanCopyKey): string {
  const locale = getCurrentLocale();
  if (key === 'title') {
    return getOmniText(locale, 'card.scan_nfc');
  }
  if (key === 'success') {
    return getOmniText(locale, 'common.success');
  }
  if (key === 'error') {
    return getOmniText(locale, 'common.error');
  }
  if (key === 'empty') {
    return getOmniText(locale, 'common.empty');
  }

  const zh = isZhLocale();
  if (key === 'desc') {
    return zh
      ? '贴近实体卡，或手动填写芯片 UID 完成绑定'
      : 'Hold the card to this phone, or enter the chip UID to bind it';
  }
  if (key === 'uidLabel') {
    return zh ? '芯片 UID' : 'Chip UID';
  }
  if (key === 'uidPlaceholder') {
    return zh ? '输入芯片 UID' : 'Enter chip UID';
  }
  if (key === 'cardIdLabel') {
    return zh ? '名片编号' : 'Card ID';
  }
  if (key === 'cardIdPlaceholder') {
    return zh ? '输入名片编号' : 'Enter card ID';
  }
  if (key === 'cta') {
    return zh ? '激活并绑定' : 'Activate and bind';
  }
  if (key === 'uidRequired') {
    return zh ? '请填写芯片 UID' : 'Enter the chip UID';
  }
  if (key === 'cardIdRequired') {
    return zh ? '请填写名片编号' : 'Enter a card ID';
  }
  if (key === 'nfcUnavailable') {
    return zh
      ? '当前无法读取 NFC，请手动填写 UID'
      : 'NFC is unavailable. Enter the UID instead';
  }
  if (key === 'retry') {
    return zh ? '重试' : 'Try again';
  }
  return '';
}

/**
 * 去空。空串视为非法 UID
 */
export function parseUid(raw: string | number | null | undefined): string {
  if (raw == null) {
    return '';
  }
  return String(raw).trim();
}

/**
 * 解析为正整数。非正整数返回 null
 */
export function parseCardId(raw: string | number | null | undefined): number | null {
  if (raw == null) {
    return null;
  }
  if (typeof raw === 'number') {
    if (raw <= 0) {
      return null;
    }
    if (Math.floor(raw) !== raw) {
      return null;
    }
    return raw;
  }
  const text = String(raw).trim();
  if (text === '') {
    return null;
  }
  if (!/^[1-9]\d*$/.test(text)) {
    return null;
  }
  return Number(text);
}

function readErrorMessage(err: unknown): string {
  if (err instanceof Error && err.message !== '') {
    return err.message;
  }
  return resolveScanText('error');
}

/**
 * 贴卡激活：有入参 cardId 则 bind；设备已有 cardId 且入参为空则 activate
 */
export async function activateByTap(
  input: ActivateByTapInput,
  existing?: { cardId?: string | number | null } | null
): Promise<NFCRecord> {
  const uid = parseUid(input.uid);
  if (uid === '') {
    throw new Error(resolveScanText('uidRequired'));
  }

  const incomingCardId = parseCardId(input.cardId);
  const fromInputDevice = parseCardId(input.deviceCardId);
  const fromExisting = existing != null ? parseCardId(existing.cardId) : null;
  const deviceCardId = fromInputDevice != null ? fromInputDevice : fromExisting;

  try {
    if (incomingCardId == null && deviceCardId != null) {
      return await activateNfcDevice({ uid });
    }
    if (incomingCardId != null) {
      return await bindNfcDevice({ uid, cardId: incomingCardId });
    }
    throw new Error(resolveScanText('cardIdRequired'));
  } catch (err) {
    throw new Error(readErrorMessage(err));
  }
}

export function createScanState(): ScanState {
  return {
    uid: '',
    cardIdRaw: '',
    deviceCardId: null,
    submitting: false,
    scanning: false,
    manualInput: true,
    errorMessage: '',
    empty: true,
    record: null,
  };
}

export function applyScanOptions(state: ScanState, options: ScanPageOptions | null): void {
  if (options == null) {
    return;
  }
  if (options.uid != null) {
    state.uid = parseUid(options.uid);
  }
  const cardRaw =
    options.cardId != null && options.cardId !== ''
      ? options.cardId
      : options.id != null
        ? options.id
        : '';
  if (cardRaw !== '') {
    state.cardIdRaw = String(cardRaw).trim();
  }
  state.empty = parseUid(state.uid) === '';
}

/**
 * APP 原生贴卡占位。调不到天线时回退手动输入，禁止伪造成功
 */
export function startScan(state: ScanState): boolean {
  // #ifdef APP
  // Native NFC antenna is not wired in this skeleton.
  // #endif
  state.scanning = false;
  state.manualInput = true;
  state.record = null;
  if (parseUid(state.uid) === '') {
    state.empty = true;
    state.errorMessage = resolveScanText('nfcUnavailable');
  }
  return false;
}

export function resolveStatusLine(state: ScanState): string {
  if (state.errorMessage !== '') {
    return state.errorMessage;
  }
  if (state.empty && parseUid(state.uid) === '') {
    return resolveScanText('empty');
  }
  return '';
}

/**
 * 页面主 CTA：校验后走 activateByTap，失败写入一句错误
 */
export async function submitScan(state: ScanState): Promise<NFCRecord | null> {
  if (state.submitting) {
    return null;
  }

  const uid = parseUid(state.uid);
  if (uid === '') {
    state.empty = true;
    state.errorMessage = resolveScanText('uidRequired');
    return null;
  }

  state.uid = uid;
  state.empty = false;
  state.submitting = true;
  state.errorMessage = '';

  try {
    const record = await activateByTap(
      {
        uid,
        cardId: state.cardIdRaw,
        deviceCardId: state.deviceCardId,
      },
      { cardId: state.deviceCardId }
    );
    state.submitting = false;
    state.record = record;
    if (record.cardId != null) {
      const bound = parseCardId(record.cardId);
      if (bound != null) {
        state.deviceCardId = bound;
      }
    }
    return record;
  } catch (err) {
    state.submitting = false;
    state.record = null;
    state.errorMessage = readErrorMessage(err);
    return null;
  }
}