ezseed/database

var models = require('../models')
  , File = models.file
  , async = require('async')
  , helpers = require('./helpers')


module.exports = function(type) {
    var debug = require('debug')('ezseed:database:'+type)
  var file_type = helpers.filename(type)

  var item = {
    delete: function(id, done) {
      debug('Deleting %s', type)
      item.get(id, function(err, item) {
        if(err)
          done(err)

        if(item[file_type].length === 0)
          models[type].remove({_id: item._id}, done)
        else
          async.each(item[file_type], function(file, cb) {
            File.findByIdAndRemove(file._id, cb)
          }, function(err) {
            if(err)
              done(err)

            models[type].remove({_id: item._id}, done)
          })

      })
    },
    get: function(id, done) {
      models[type].findById(id).populate(file_type).exec(done)
    },
    /**
     * Saving item
     * @param  {Array | Object}   items
     * @param  {[type]}   options  path to add item to a path
     * @return {callback}           err, item
     */
    save: function (items, id_path, done) {

      done = typeof id_path == 'function' ? id_path : done

      var next = function(item, cb) {
        debug('creating %s', type)

        File.create(item[file_type], function(err, items) {
          if(err)
            return cb(err)

          item[file_type] = Array.prototype.slice.call(arguments, 1)
          debug('%s %s created', item[file_type].length, file_type)

          models[type].create(item, function(err, item) {
            if(err)
              return cb(err)

            debug('item created')

            if(id_path) {
              debug('Saving item to path')
              require('./paths')
              .files.add(id_path, item, function(err, path) {
                cb(err, item)
              })
            } else
              return cb(null, item)

          })
        })

      }

      if(items instanceof Array) {
        async.map(items, next,    done)
      } else {
        next(items, done)
      }
    },
    populate: function(docs, done) {
      debug('populating %s', type)
      models[type].populate(docs, {path: type+'.'+file_type, model: 'File'}, done)
    }
  }

  return item
}