import projects from '../_sampleData.js'

class ProjectMock {
  constructor (data) {
    for (let prop in data) {
      this[prop] = data[prop]
    }
    this.modelName = 'project'
    // use this switch to simulate save errors.
    this._saveError = false
    // use this switch to simulate remove errors.
    this._removeError = false
  }

  static get schema () { return { obj: { __history: {} } } }

  static findOne (criteria, callback) {
    const { _id, tag } = criteria
    let foundProject
    if (typeof _id !== 'undefined') {
      foundProject = projects.find(project => {
        return (_id.equals(project._id))
      })
    } else if (typeof tag !== 'undefined') {
      foundProject = projects.find(project => {
        return (tag === project.tag && project.history.head === true)
      })
    }
    if (foundProject) {
      // return the project
      callback(undefined, foundProject)
    } else {
      // else return 404
      callback(Error('item not found'), undefined)
    }
  }

  static find (criteria, options, callback) {
    let { limit, skip } = options
    const onlyHead = criteria['history.head']
    const projectsFiltered = projects.filter(project => {
      return project.history.head
    })
    // apply criteria
    const projectsSlice = projectsFiltered.slice(skip, skip + limit)
    if (projectsSlice) {
      // return the array
      callback(undefined, projectsSlice)
    } else {
      // if nothing can be shown, return 404
      callback(Error('no items found'), undefined)
    }
  }

  save () {
    throw Error('save not implemented.')
  }

  remove () {
    throw Error('remove not implemented.')
  }
}

export default ProjectMock