import _ from 'lodash';
import { Response, Router } from 'express';
import buildDebug from 'debug';

import { getAuthenticatedMessage, validatePassword, ErrorCode } from '@verdaccio/utils';
import { getApiToken } from '@verdaccio/auth';
import { logger } from '@verdaccio/logger';
import { createRemoteUser } from '@verdaccio/config';

import { Config, RemoteUser } from '@verdaccio/types';
import { IAuth } from '@verdaccio/auth';
import { API_ERROR, API_MESSAGE, HTTP_STATUS } from '@verdaccio/commons-api';
import { $RequestExtend, $NextFunctionVer } from '../types/custom';

const debug = buildDebug('verdaccio:api:user');

export default function (route: Router, auth: IAuth, config: Config): void {
  route.get(
    '/-/user/:org_couchdb_user',
    function (req: $RequestExtend, res: Response, next: $NextFunctionVer): void {
      debug('verifying user');
      const message = getAuthenticatedMessage(req.remote_user.name);
      debug('user authenticated message %o', message);
      res.status(HTTP_STATUS.OK);
      next({
        ok: message,
      });
    }
  );

  route.put(
    '/-/user/:org_couchdb_user/:_rev?/:revision?',
    function (req: $RequestExtend, res: Response, next: $NextFunctionVer): void {
      const { name, password } = req.body;
      debug('login or adduser');
      const remoteName = req.remote_user.name;

      if (_.isNil(remoteName) === false && _.isNil(name) === false && remoteName === name) {
        debug('login: no remote user detected');
        auth.authenticate(
          name,
          password,
          async function callbackAuthenticate(err, user): Promise<void> {
            if (err) {
              logger.trace(
                { name, err },
                'authenticating for user @{username} failed. Error: @{err.message}'
              );
              return next(
                ErrorCode.getCode(HTTP_STATUS.UNAUTHORIZED, API_ERROR.BAD_USERNAME_PASSWORD)
              );
            }

            const restoredRemoteUser: RemoteUser = createRemoteUser(name, user.groups || []);
            const token = await getApiToken(auth, config, restoredRemoteUser, password);
            debug('login: new token');
            if (!token) {
              return next(ErrorCode.getUnauthorized());
            }

            res.status(HTTP_STATUS.CREATED);

            const message = getAuthenticatedMessage(req.remote_user.name);
            debug('login: created user message %o', message);

            return next({
              ok: message,
              token,
            });
          }
        );
      } else {
        if (validatePassword(password) === false) {
          debug('adduser: invalid password');
          // eslint-disable-next-line new-cap
          return next(ErrorCode.getCode(HTTP_STATUS.BAD_REQUEST, API_ERROR.PASSWORD_SHORT()));
        }

        auth.add_user(name, password, async function (err, user): Promise<void> {
          if (err) {
            if (err.status >= HTTP_STATUS.BAD_REQUEST && err.status < HTTP_STATUS.INTERNAL_ERROR) {
              debug('adduser: error on create user');
              // With npm registering is the same as logging in,
              // and npm accepts only an 409 error.
              // So, changing status code here.
              return next(
                ErrorCode.getCode(err.status, err.message) || ErrorCode.getConflict(err.message)
              );
            }
            return next(err);
          }

          const token =
            name && password ? await getApiToken(auth, config, user, password) : undefined;
          debug('adduser: new token %o', token);
          if (!token) {
            return next(ErrorCode.getUnauthorized());
          }

          req.remote_user = user;
          res.status(HTTP_STATUS.CREATED);
          debug('adduser: user has been created');
          return next({
            ok: `user '${req.body.name}' created`,
            token,
          });
        });
      }
    }
  );

  route.delete(
    '/-/user/token/*',
    function (req: $RequestExtend, res: Response, next: $NextFunctionVer): void {
      res.status(HTTP_STATUS.OK);
      next({
        ok: API_MESSAGE.LOGGED_OUT,
      });
    }
  );
}