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

const bcrypt = require('bcrypt');
const randToken = require('rand-token');

const ingredientsRouter = require('./recepieIngredients');
const toolsRouter = require('./recepieTools');
const durationsRouter = require('./recepieDurations');
const stepsRouter = require('./recepieSteps');


const DEBUG = false;



router.param('recepieId', function(req, res, next, id) {
  req.recepieId = id;
  let query = " Select rezept.id, rezept.schluessel, schwierigkeit, schwierigkeit.name as schwierigkeitName, rezept.name, portionen, nutzer, rezept.beschreibung, "+
              " (SELECT sum(dauer) FROM rezept_dauer WHERE rezept = rezept.id) as overall_duration, "+
              " (SELECT round(avg(wert),1) FROM rezept_wertung WHERE rezept =  rezept.id) as rating "+
              " FROM rezept JOIN schwierigkeit on schwierigkeit = schwierigkeit.id ";
  if(isNaN(req.recepieId)) {
    query += " WHERE rezept.schluessel ilike '$1'";
  } else {
    query += " WHERE rezept.id = $1";
  }

  if(DEBUG) console.log(query);
  req.db.query(query, [req.recepieId], (err, rs) => {
    if (err) {
      return next(err)
    }
    req.recepie = rs.rows[0];
    next();
  })
});

router.use('/:recepieId/ingredients/', ingredientsRouter);
router.use('/:recepieId/tools/', toolsRouter);
router.use('/:recepieId/durations/', durationsRouter);
router.use('/:recepieId/steps/', stepsRouter);

/* GET recepies listing. */
router.get('/', function(req, res, next) {
  let query =  " Select rezept.id, rezept.schluessel, schwierigkeit, schwierigkeit.name as schwierigkeitName, rezept.name, portionen, nutzer, rezept.beschreibung, "+
              " (SELECT sum(dauer) FROM rezept_dauer WHERE rezept =  rezept.id) as overall_duration, "+
              " (SELECT round(avg(wert),1) FROM rezept_wertung WHERE rezept =  rezept.id) as rating "+
              " FROM rezept JOIN schwierigkeit on schwierigkeit = schwierigkeit.id ";
  if(req.query.term) query += " WHERE rezept.name ilike '%"+req.query.term+"%' "
  if(req.query['sort_by']) {
    if(req.query['sort_by'] === 'creation') query += " ORDER BY rezept.id desc";
    if(req.query['sort_by'] === 'best_match') query += " ORDER BY rezept.name ";
    if(req.query['sort_by'] === 'rating') query += " ORDER BY rating ";
  }


  if(DEBUG) console.log(query);
  req.db.query(query, (err, rs) => {
    if (err){
      console.log(query);
      next(err);
    } else {
      let result  = {};
      result['recepies'] = rs.rows;
      console.log(result);
      res.status(200).json(result);
    }
  });
});

router.post('/', function(req, res, next) {
  let recepie = req.body.recepies;
  if(!recepie.schluessel) recepie.schluessel = randToken.uid(8);
  if(!recepie.schwierigkeit || !recepie.name || !recepie.nutzer) {
    return res.status(400).send("Wrong Params")
  }
  let query =  "INSERT INTO rezept (nutzer, name, schluessel, schwierigkeit, portionen, beschreibung) "+
              " VALUES ($1, $2, $3, $4, $5, $6)" +
              " returning *";
  let values = [recepie.nutzer, recepie.name, recepie.schluessel, recepie.schwierigkeit, recepie.portionen, recepie.beschreibung];

  if(DEBUG) console.log(query);

  req.db.query(query, values, (err, rs) => {
        if(err && err.constraint && err.constraint ==='idx_rezept_email') {
          return res.status(409).send("Recipie Key already in use");
        } else if (err){
          next(err);
        } else {
          let result  = {};
          result['recepies'] = rs.rows[0];

          req.db.query("INSERT into rezept_dauer (rezept, sort, name, dauer) VALUES ($1, 1, 'Zubereitung', '30m')", [rs.rows[0].id], (err, rs) => {});
          req.db.query("INSERT into rezept_wertung (nutzer, rezept, wert, wertungskategorie) VALUES ($1, $2, 5, (SELECT id FROM wertungskategorie WHERE schluessel = 'sum'))", [rs.rows[0].nutzer, rs.rows[0].id], (err, rs) => {});
          req.db.query("INSERT into rezept_schitt (rezept, sort, name, beschreibung) VALUES ($1, 1, 'Zubreitung', 'Mit Sherry ablöschen, Sahne hinzugeben und Parmesan reiben.')", [rs.rows[0].id], (err, rs) => {});


          res.status(200).json(result);
      }
    });
});

/* Methods with id */
router.get('/:recepieId', function(req, res, next) {
  res.status(200).json(req.recepie);
});

router.put('/:recepieId', function(req, res, next) {
  let recepie = req.body.recepies;
  let query =  "UPDATE rezept set name = '"+recepie.name+
            "', schluessel='"+recepie.schluessel+
            "', portionen='"+recepie.portionen+
            "', schwierigkeit='"+recepie.schwierigkeit+
            "', beschreibung = '"+recepie.beschreibung+"' "+
            " WHERE id = "+req.recepieId +
            " returning *";
  if(DEBUG) console.log(query);
  req.db.query(query, (err, rs) => {
      if (err){
        next(err);
      } else {
        let result  = {};
        result['recepies'] = rs.rows[0];
        res.status(200).json(result);
      }
  });
});


router.delete('/:recepieId', function(req, res, next) {
  let query = [
    "DELETE FROM rezept_dauer where rezept = $1;",
    "DELETE FROM rezept_zutat where rezept = $1;",
    "DELETE FROM rezept_geraet where rezept = $1;",
    "DELETE FROM rezept where id = $1;"
  ];
  for(let i = 0; i< query.length; i++) {
    req.db.query(query[i], [req.recepieId], (err, rs) => {
      if (err) next(err)

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

module.exports = router;