const { readQiweiAuthToken, readQiweiApiBase } = require('../core/credentials');
const { callFmodeWecomGateway, redactSecret } = require('../providers/fmode-wecom-gateway');
const { okResult, errorResult } = require('../core/result-envelope');

function authRequiredResult() {
  return {
    status: 'needs_auth',
    assistantMessage: '还没有找到 Fmode 鉴权 token，无法调用由 Fmode 网关转发的企业微信接口。请配置 QIWEI_AUTH_TOKEN、FMODE_API_KEY 或平台 sessionToken 后重试。',
    summary: { errorKind: 'missing_auth_token', recoverable: true },
    data: {},
    files: [],
    nextActions: ['配置 Fmode 鉴权 token 后重试'],
    warnings: [],
    errors: []
  };
}

function subscriptionError(error, stage) {
  const safeMessage = redactSecret(error && (error.bizMessage || error.message));
  const kind = String((error && error.kind) || 'upstream');
  if (kind === 'auth') return authRequiredResult();
  if (kind === 'billing') {
    return {
      status: 'needs_recharge',
      assistantMessage: `飞马余额不足或订阅扣费失败（${safeMessage}）。请充值后重新调用 qiwei_subscribe。`,
      summary: { stage, errorKind: kind, recoverable: true },
      data: {},
      files: [],
      nextActions: ['充值飞马余额', '重新调用 qiwei_subscribe'],
      warnings: [],
      errors: []
    };
  }
  return errorResult(`企微订阅操作失败：${safeMessage}`, {
    summary: { stage, errorKind: kind },
    nextActions: ['稍后重试', '若持续失败，请检查 Fmode 网关的企业微信接口状态']
  });
}

async function qiweiSubscriptionStatus(input = {}) {
  const token = readQiweiAuthToken(input);
  if (!token) return authRequiredResult();
  try {
    const result = await callFmodeWecomGateway({
      gatewayPath: '/subscribe/status',
      httpMethod: 'GET',
      token,
      apiBase: readQiweiApiBase(input),
      cacheBust: true
    });
    const data = result.data || {};
    return okResult({
      assistantMessage: data.subscribed
        ? `企微包月订阅有效：${data.usedSeats ?? 0}/${data.seats ?? 0} 个席位已使用，到期时间 ${data.expireAt || '未知'}。`
        : '企微包月订阅尚未开通或已到期，请调用 qiwei_subscribe 开通或续费。',
      summary: {
        subscribed: Boolean(data.subscribed),
        seats: data.seats ?? null,
        usedSeats: data.usedSeats ?? null,
        expireAt: data.expireAt || null,
        autoRenew: data.autoRenew ?? null,
        balance: data.balance
      },
      data,
      nextActions: data.subscribed ? [] : ['调用 qiwei_subscribe 开通或续费']
    });
  } catch (error) {
    return subscriptionError(error, 'subscriptionStatus');
  }
}

async function qiweiSubscribe(input = {}) {
  const token = readQiweiAuthToken(input);
  if (!token) return authRequiredResult();
  const seats = input.seats === undefined ? undefined : Number(input.seats);
  const months = input.months === undefined ? 1 : Number(input.months);
  if (seats !== undefined && (!Number.isInteger(seats) || seats < 1)) {
    return errorResult('seats 必须是大于等于 1 的整数。');
  }
  if (!Number.isInteger(months) || months < 1 || months > 12) {
    return errorResult('months 必须是 1-12 的整数。');
  }
  try {
    const result = await callFmodeWecomGateway({
      gatewayPath: '/subscribe',
      body: { ...(seats === undefined ? {} : { seats }), months },
      token,
      apiBase: readQiweiApiBase(input)
    });
    const data = result.data || {};
    return okResult({
      assistantMessage: `企微包月订阅已开通或续费：${data.seats ?? seats ?? 1} 个席位，购买 ${data.months ?? months} 个月，到期时间 ${data.expireAt || '未知'}。`,
      summary: {
        subscribed: true,
        seats: data.seats ?? seats ?? 1,
        months: data.months ?? months,
        amount: data.amount ?? null,
        expireAt: data.expireAt || null,
        autoRenew: data.autoRenew ?? null
      },
      data,
      nextActions: ['调用 qiwei_login_start 添加或重新登录企业微信账号']
    });
  } catch (error) {
    return subscriptionError(error, 'subscribe');
  }
}

async function qiweiSubscriptionAutoRenew(input = {}) {
  const token = readQiweiAuthToken(input);
  if (!token) return authRequiredResult();
  if (typeof input.autoRenew !== 'boolean') return errorResult('autoRenew 必须是 boolean。');
  try {
    const result = await callFmodeWecomGateway({
      gatewayPath: '/subscribe/autoRenew',
      body: { autoRenew: input.autoRenew },
      token,
      apiBase: readQiweiApiBase(input)
    });
    const data = result.data || {};
    return okResult({
      assistantMessage: `企微订阅自动续费已${data.autoRenew ? '开启' : '关闭'}。`,
      summary: { autoRenew: Boolean(data.autoRenew) },
      data
    });
  } catch (error) {
    return subscriptionError(error, 'subscriptionAutoRenew');
  }
}

module.exports = {
  qiweiSubscriptionStatus,
  qiweiSubscribe,
  qiweiSubscriptionAutoRenew
};