const express = require('express');
const router = express.Router();

const DEBUG = false;



router.param('userId', function(req, res, next, id) {
  req.userId = id;
  let query =  "Select id, name, email, kennwort, beschreibung FROM nutzer WHERE id ="+req.userId;
  if(isNaN(req.userId)) query = "Select id, name, email, kennwort, beschreibung FROM nutzer WHERE email ilike '"+req.userId+"'";
  if(DEBUG) console.log(query);
  req.db.query(query, (err, rs) => {
    if (err) {
      return next(err)
    }
    req.user = rs.rows[0];
    next();
  })
});

/* GET users listing. */
router.get('/', function(req, res, next) {
  let query =  "Select id, name, email, beschreibung FROM nutzer ";
  if(DEBUG) console.log(query);
  req.db.query(query, (err, rs) => {
    if (err){
      next(err);
    } else {
      let result  = {};
      result['users'] = rs.rows;
      console.log(result);
      res.status(200).json(result);
    }
  });
});

router.post('/', function(req, res, next) {
  let user = req.body.users[0];

    let query =  "INSERT INTO nutzer ( name, email, kennwort, beschreibung) "+
              " VALUES ('"+user.name+"','"+user.email+"','"+hash+"','"+user.beschreibung+"')" +
              " returning *";
    if(DEBUG) console.log(query);

    req.db.query(query, (err, rs) => {
        if(err && err.constraint && err.constraint ==='idx_nutzer_email') {
          return res.status(409).send("Email-adress already in use");
        } else if (err){
          next(err);
        } else {
          let result  = {};
          let user = {};
          user['name'] = rs.rows[0].name;
          user['email'] = rs.rows[0].email;
          user['id'] = rs.rows[0].id;
          user['beschreibung'] = rs.rows[0].beschreibung;
          result['users'] = user;
          res.status(200).json(result);
      }
    });

});


/* Methods with id */
router.get('/:userId', function(req, res, next) {
  let user = {};
  let result = {};
  user['name'] = req.user.name;
  user['email'] = req.user.email;
  user['id'] = req.user.id;
  user['beschreibung'] = req.user.beschreibung;
  result['users'] = user;
  res.status(200).json(result);
});

router.put('/:userId', function(req, res, next) {
  let user = req.body.users[0];
  let query =  "UPDATE nutzer set name = '"+user.name+"', email='"+user.email+"', beschreibung = '"+user.beschreibung+"' "+
            " WHERE id = "+req.userId +
            " returning *";
  if(DEBUG) console.log(query);
  req.db.query(query, (err, rs) => {
      if(err && err.constraint && err.constraint ==='idx_nutzer_email') {
        return res.status(409).send("Email-adress already in use");
      } else if (err){
        next(err);
      } else {
        let result  = {};
        let user = {};
        user['name'] = rs.rows[0].name;
        user['email'] = rs.rows[0].email;
        user['id'] = rs.rows[0].id;
        user['beschreibung'] = rs.rows[0].beschreibung;
        result['users'] = user;
        res.status(200).json(result);
      }
  });
});




router.delete('/:userId', function(req, res, next) {
  let query = [
    "DELETE FROM nutzer_favorit where nutzer = $1;",
    "DELETE FROM nutzer_kommentar where nutzer = $1;",
    "DELETE FROM nutzer_rolle where nutzer = $1;",
    "DELETE FROM nutzer where id = $1;"
  ];
  for(let i = 0; i< query.length; i++) {
    req.db.query(query[i], [req.userId], (err, rs) => {
      if (err) next(err)

    });
  }
  res.status(204).send();
});

module.exports = router;