'use strict';

const crypto = require('crypto');
const uuid = require('uuid');
const PHONE_REGEXP = /^1\d{10}$/;
const CODE_REGEXP = /^\d{6}$/;
const LOGIN_TOKEN_EXPIRE_SECONDS = 3 * 24 * 60 * 60;
const SMS_BUSINESS_TYPE = {
   LOGIN: 'LOGIN',
   REGISTER: 'REGISTER',
};
const REDIS_TENDER_TOKEN_KEY_PREFIX = 'tender:user:token:';

const getModels = (ctx) => ctx?.fs?.models || ctx?.fs?.dc?.models || {};
const getRedis = (ctx) => ctx?.app?.fs?.redis;
const getTenderUserService = (ctx) => ctx?.app?.fs?.tenderUserService;
const getAideductService = (ctx) => ctx?.app?.fs?.aideductService;
const getQuotaService = (ctx) => ctx?.app?.fs?.quotaBillingService;
const getCenterRequest = (ctx) => ctx?.app?.fs?.centerRequest;
const getRequestToken = (ctx) => {
   const { query = {}, header = {} } = ctx;
   const authHeader = header.authorization || header.Authorization;
   if (query.token) return query.token;
   if (header.token) return header.token;
   if (authHeader && /^Bearer\s+/i.test(authHeader)) {
      return authHeader.replace(/^Bearer\s+/i, '').trim();
   }
   return '';
};

const md5 = (text = '') => crypto.createHash('md5').update(String(text)).digest('hex');
const normalizeBusinessType = (value) => {
   const raw = String(value || '').trim().toUpperCase();
   if (raw === SMS_BUSINESS_TYPE.LOGIN) return SMS_BUSINESS_TYPE.LOGIN;
   if (raw === SMS_BUSINESS_TYPE.REGISTER) return SMS_BUSINESS_TYPE.REGISTER;
   throw 'businessType仅支持 LOGIN 或 REGISTER';
};

const normalizeNullableDepartmentId = (value) => {
   if (value === undefined || value === null || value === '') return null;
   const parsed = Number.parseInt(String(value), 10);
   if (!Number.isFinite(parsed) || parsed <= 0) return null;
   return parsed;
};

const buildLoginPayload = (user) => ({
   departmentId: normalizeNullableDepartmentId(user.departmentId),
   department: normalizeNullableDepartmentId(user.departmentId)
      ? [{ id: normalizeNullableDepartmentId(user.departmentId) }]
      : [],
   id: user.id,
   pepId: user.pepId,
   pepUserId: user.pepId,
   status: user.status,
   displayName: user.displayName,
   realName: user.realName,
   phone: user.phone,
   email: user.email,
   avatarUrl: user.avatarUrl,
   registerSource: user.registerSource,
   lastLoginAt: user.lastLoginAt,
   needSetPassword: (user.registerSource === 'PHONE') && !Boolean(user.password),
});

const issueLoginToken = async (ctx, user, issuedToken) => {
   const redis = getRedis(ctx);
   if (!redis) {
      throw 'Redis未配置，无法完成登录鉴权';
   }
   const token = issuedToken || uuid.v4();
   const tokenValue = {
      id: user.id,
      userType: 'TENDER_USER',
   };
   const tokenKey = `${REDIS_TENDER_TOKEN_KEY_PREFIX}${token}`;
   await redis.set(tokenKey, JSON.stringify(tokenValue), 'EX', LOGIN_TOKEN_EXPIRE_SECONDS);

   const userInfo = {
      ...buildLoginPayload(user),
      authorized: true,
      userType: 'TENDER_USER',
      token,
   };
   return userInfo;
};

const resolveAiCenterToken = (res = {}) => String(
   res?.token
   || res?.data?.token
   || res?.body?.token
   || res?.body?.data?.token
   || res?.userInfo?.token
   || res?.data?.userInfo?.token
   || '',
).trim();

const resolveAiCenterUser = (res = {}) => (
   res?.AIUserInfo
   || res?.data?.AIUserInfo
   || res?.data?.userInfo
   || res?.body?.userInfo
   || res?.body?.data?.userInfo
   || res?.data
   || res?.body?.data
   || res?.body
   || {}
);

const getAiCenterAuthConfig = (ctx) => ({
   passwordLoginPath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.passwordLoginPath || '/api/support/user/account/loginByPassword',
   loginByCodePath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.loginByCodePath || '/api/support/user/account/loginByCode',
   registerByCodePath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.registerByCodePath || '/api/support/user/account/registerByCode',
   sendCodePath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.sendCodePath || '/send-code',
   phoneRegisteredPath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.phoneRegisteredPath || '/phone-registered',
   profilePath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.profilePath || '/profile',
   logoutPath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.logoutPath || '/logout',
   verifyTokenPath: ctx?.app?.fs?.config?.tenderUser?.aiCenter?.verifyTokenPath || '/verify-token',
});

const normalizeAiCenterAuthPayload = (res = {}) => {
   const AIUserInfo = resolveAiCenterUser(res);
   const token = resolveAiCenterToken(res);
   const authorizedRaw = res?.authorized ?? res?.data?.authorized;
   return {
      AIUserInfo,
      token,
      authorized: authorizedRaw === undefined ? Boolean(token) : Boolean(authorizedRaw),
   };
};

const callAiCenterAuth = async (ctx, path, payload) => {
   const centerRequest = getCenterRequest(ctx);
   if (!centerRequest) {
      throw 'ai-center登录服务未初始化';
   }
   const res = await centerRequest.post(path, { body: payload });
   if (!res) {
      throw '无此用户，请使用正确的登录信息';
   }
   const status = Number(res?.code ?? res?.status ?? 200);
   if (status >= 400) {
      throw res?.message || res?.msg || 'ai-center登录失败';
   }
   return res;
};

const upsertTenderUserByAiCenterUser = async (ctx, centerUser = {}, fallbackPhone = null) => {
   const models = getModels(ctx);
   if (!models.TenderUser) {
      throw '登录服务未初始化';
   }

   const centerUserId = String(
      centerUser?.pepUserId
      || centerUser?.pep_user_id
      || centerUser?.id
      || centerUser?.userId
      || centerUser?.uid
      || '',
   ).trim();
   const phone = String(centerUser?.phone || centerUser?.mobile || fallbackPhone || '').trim() || null;
   if (!centerUserId && !phone) {
      throw 'ai-center用户信息异常，缺少用户标识';
   }

   let user = null;
   if (centerUserId) {
      user = await models.TenderUser.findOne({
         where: {
            pepId: centerUserId,
            deletedAt: null,
         },
      });
   }
   if (!user && phone) {
      user = await models.TenderUser.findOne({
         where: {
            phone,
            deletedAt: null,
         },
      });
   }

   const nextValues = {
      pepId: centerUserId || null,
      phone,
      displayName: centerUser?.displayName || centerUser?.name || centerUser?.username || (phone ? `用户${phone.slice(-4)}` : `用户${centerUserId.slice(-4)}`),
      realName: centerUser?.realName || centerUser?.name || null,
      email: centerUser?.email || null,
      status: 1,
      registerSource: phone ? 'PHONE' : 'PEP',
      lastLoginAt: new Date(),
   };

   const departmentId = normalizeNullableDepartmentId(
      centerUser?.departmentId ?? centerUser?.deptId ?? centerUser?.department?.id,
   );
   if (departmentId !== null) {
      nextValues.departmentId = departmentId;
   }

   if (!user) {
      user = await models.TenderUser.create(nextValues);
   } else {
      if (Number(user.status) !== 1) {
         throw '账号已被禁用';
      }
      await user.update(nextValues);
   }
   return user;
};

const refreshCurrentTokenPayload = async (ctx, user) => {
   const redis = getRedis(ctx);
   const { header, query } = ctx;
   const token = query.token || header.token;
   if (!redis || !token) return;
   const tokenKey = `${REDIS_TENDER_TOKEN_KEY_PREFIX}${token}`;
   const nextTokenValue = {
      id: user.id,
      userType: 'TENDER_USER',
   };
   const ttl = await redis.ttl(tokenKey);
   await redis.set(
      tokenKey,
      JSON.stringify(nextTokenValue),
      'EX',
      ttl > 0 ? ttl : LOGIN_TOKEN_EXPIRE_SECONDS,
   );
};

module.exports.captcha = async (ctx) => {
   try {
      const service = getTenderUserService(ctx);
      if (!service?.buildCaptchaPayload) {
         throw '验证码服务未初始化';
      }
      const payload = await service.buildCaptchaPayload(ctx);
      ctx.status = 200;
      ctx.body = payload;
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : '获取图形验证码失败',
      };
   }
};

module.exports.sendCode = async (ctx) => {
   try {
      const { phone, businessType } = ctx.request.body || {};
      if (!phone || !PHONE_REGEXP.test(String(phone))) {
         throw '请输入正确的手机号';
      }
      const normalizedBusinessType = normalizeBusinessType(businessType);
      const normalizedPhone = String(phone);

      // 注册状态必须以 ai-center 用户中心为准，避免本地 TenderUser 同步滞后导致误判。
      const { phoneRegisteredPath } = getAiCenterAuthConfig(ctx);
      const registeredResult = await callAiCenterAuth(ctx, phoneRegisteredPath, {
         phone: normalizedPhone,
      });
      const isRegistered = Boolean(registeredResult?.registered ?? registeredResult?.data?.registered);
      const isLogin = normalizedBusinessType === SMS_BUSINESS_TYPE.LOGIN;
      if (isLogin && !isRegistered) {
         throw '该手机号未注册，请先注册';
      }
      if (!isLogin && isRegistered) {
         throw '该手机号已注册，请直接登录';
      }

      const { sendCodePath } = getAiCenterAuthConfig(ctx);
      const result = await callAiCenterAuth(ctx, sendCodePath, {
         phone: normalizedPhone,
         businessType: normalizedBusinessType,
      });
      if (result?.success === false) {
         throw result?.message || '发送验证码失败';
      }

      ctx.status = 200;
      ctx.body = result;
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : (error?.response?.body?.message || error?.message || '发送验证码失败'),
      };
   }
};

module.exports.loginOrRegisterByCode = async (ctx) => {
   try {
      const { phone, code, businessType, name, password } = ctx.request.body || {};
      const normalizedBusinessType = normalizeBusinessType(businessType);
      if (!phone || !PHONE_REGEXP.test(String(phone))) {
         throw '请输入正确的手机号';
      }
      if (!code || !CODE_REGEXP.test(String(code))) {
         throw '请输入正确验证码';
      }

      const { loginByCodePath, registerByCodePath } = getAiCenterAuthConfig(ctx);
      const path = normalizedBusinessType === SMS_BUSINESS_TYPE.REGISTER
         ? registerByCodePath
         : loginByCodePath;
      const aiCenterRes = await callAiCenterAuth(ctx, path, {
         phone: String(phone),
         code: String(code),
         businessType: normalizedBusinessType,
         name: String(name || '').trim(),
         password: String(password || ''),
      });
      const userInfo = normalizeAiCenterAuthPayload(aiCenterRes);

      ctx.status = 200;
      ctx.body = userInfo;
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string'
            ? error
            : (error?.response?.body?.message || error?.message || '验证码登录失败'),
      };
   }
};

module.exports.loginByPassword = async (ctx) => {
   try {
      const { username, password } = ctx.request.body || {};
      if (!username || !String(username).trim()) {
         throw '请输入账号';
      }
      if (!password || !String(password).trim()) {
         throw '请输入密码';
      }
      const loginName = String(username).trim();

      const { passwordLoginPath } = getAiCenterAuthConfig(ctx);
      const aiCenterRes = await callAiCenterAuth(ctx, passwordLoginPath, {
         username: loginName,
         password: String(password),
      });
      const userInfo = normalizeAiCenterAuthPayload(aiCenterRes);

      ctx.status = 200;
      ctx.body = userInfo;
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : (error?.response?.body?.message || error?.message || '账号登录失败'),
      };
   }
};

module.exports.setPassword = async (ctx) => {
   try {
      const { password } = ctx.request.body || {};
      if (!password || String(password).trim().length < 6) {
         throw '密码长度不能少于6位';
      }

      const models = getModels(ctx);
      const curUser = ctx?.fs?.curUser?.userInfo;
      if (!curUser?.id) {
         throw '用户未登录';
      }

      const user = await models.TenderUser.findOne({
         where: {
            id: curUser.id,
            deletedAt: null,
         },
      });
      if (!user) {
         throw '用户不存在';
      }
      if (user.registerSource === 'PEP') {
         throw '项企账号不支持修改密码';
      }

      await user.update({
         password: md5(String(password)),
         registerSource: user.registerSource === 'PEP' ? 'PEP' : 'PHONE',
      });
      await refreshCurrentTokenPayload(ctx, user);

      ctx.status = 200;
      ctx.body = {
         ...buildLoginPayload(user),
         needSetPassword: false,
      };
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : (error?.message || '设置密码失败'),
      };
   }
};

module.exports.updateProfile = async (ctx) => {
   try {
      const { avatarUrl = '', displayName = '', phone } = ctx.request.body || {};
      const models = getModels(ctx);
      const curUser = ctx?.fs?.curUser?.userInfo;
      if (!curUser?.id) {
         throw '用户未登录';
      }

      const user = await models.TenderUser.findOne({
         where: {
            id: curUser.id,
            deletedAt: null,
         },
      });
      if (!user) {
         throw '用户不存在';
      }

      if (user.registerSource === 'PEP') {
         throw '项企账号不支持修改头像或昵称';
      }

      const nextAvatarUrl = String(avatarUrl || '').trim();
      const nextDisplayName = String(displayName || '').trim();
      const currentPhone = String(user.phone || '').trim();
      const nextPhone = phone === undefined ? undefined : String(phone || '').trim();

      if (nextPhone !== undefined) {
         if (nextPhone && !PHONE_REGEXP.test(nextPhone)) {
            throw '请输入正确的11位手机号';
         }
         if (currentPhone && nextPhone !== currentPhone) {
            throw '手机号已绑定，不支持修改';
         }
         if (!currentPhone && nextPhone) {
            const duplicatedUser = await models.TenderUser.findOne({
               where: {
                  phone: nextPhone,
                  deletedAt: null,
               },
            });
            if (duplicatedUser && Number(duplicatedUser.id) !== Number(user.id)) {
               throw '该手机号已被其他账号占用';
            }
         }
      }

      const nextValues = {
         avatarUrl: nextAvatarUrl || null,
         displayName: nextDisplayName || user.displayName,
      };
      if (!currentPhone && nextPhone) {
         nextValues.phone = nextPhone;
      }

      await user.update({
         ...nextValues,
      });
      await refreshCurrentTokenPayload(ctx, user);

      ctx.status = 200;
      ctx.body = buildLoginPayload(user);
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : (error?.message || '修改个人信息失败'),
      };
   }
};

module.exports.logout = async (ctx) => {
   try {
      const token = getRequestToken(ctx);
      if (!token) {
         throw '缺少token';
      }
      const centerRequest = getCenterRequest(ctx);
      if (!centerRequest) {
         throw 'ai-center登录服务未初始化';
      }
      const { logoutPath } = getAiCenterAuthConfig(ctx);
      await centerRequest.put(logoutPath, {
         query: { token },
      });

      ctx.status = 204;
      ctx.body = {};
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : '登出失败',
      };
   }
};

module.exports.officialProfile = async (ctx) => {
   try {
      const from = String(ctx?.request?.query?.from || '').trim();
      const externalUserId = String(ctx?.request?.query?.userid || '').trim();
      if (from !== 'OfficialWebsite') {
         throw '仅支持官网入口调用';
      }
      if (!externalUserId) {
         throw '缺少userid';
      }

      // 调用 ai-center 的官网用户认证接口
      const centerRequest = getCenterRequest(ctx);
      if (!centerRequest) {
         throw 'ai-center服务未初始化';
      }

      const aiCenterRes = await centerRequest.get('/official-profile', {
         query: {
            from: 'OfficialWebsite',
            userid: externalUserId,
         },
      });

      if (!aiCenterRes) {
         throw '官网用户认证失败';
      }

      const status = Number(aiCenterRes?.code ?? aiCenterRes?.status ?? 200);
      if (status >= 400) {
         throw aiCenterRes?.message || aiCenterRes?.msg || '官网用户认证失败';
      }

      ctx.status = 200;
      ctx.body = {
         registered: true,
         ...aiCenterRes,
      };
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : (error?.message || '官网用户信息查询失败'),
      };
   }
};

module.exports.profile = async (ctx) => {
   try {
      const token = getRequestToken(ctx);
      if (!token) {
         throw '用户未登录';
      }
      const { profilePath } = getAiCenterAuthConfig(ctx);
      const centerRequest = getCenterRequest(ctx);
      if (!centerRequest) {
         throw 'ai-center用户服务未初始化';
      }
      const centerRes = await centerRequest.get(profilePath, {
         query: { token },
      });
      if (!centerRes) {
         throw '获取用户信息失败';
      }
      ctx.status = 200;
      ctx.body = {
         AIUserInfo: resolveAiCenterUser(centerRes),
      };
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = error?.status || error?.response?.status || 400;
      ctx.body = {
         message: typeof error === 'string'
            ? error
            : (error?.response?.body?.message || error?.message || '获取用户信息失败'),
      };
   }
};