import passport from 'passport'
import createError from 'http-errors'
import autobind from 'autobind-decorator'

@autobind
export class ActivityRoutes {
  constructor(container) {
    const app = container.app

    this.log = container.log
    this.db = container.db
    this.mq = container.mq
    this.ws = container.ws

    app.route('/activities')
      .get(passport.authenticate('bearer', { session: false }), this.listActivitys)
      .post(passport.authenticate('bearer', { session: false }), this.createActivity)
      .put(passport.authenticate('bearer', { session: false }), this.updateActivity)

    app.route('/activities/:_id([a-f0-9]{24})')
      .get(passport.authenticate('bearer', { session: false }), this.getActivity)
      .delete(passport.authenticate('bearer', { session: false }), this.deleteActivity)
  }

  listActivitys(req, res, next) {
    const Activity = this.db.Activity
    const limit = req.query.limit || 20
    const skip = req.query.skip || 0
    const partial = !!req.query.partial
    const branch = req.query.branch
    const query = {}

    if (branch) {
      query.branch = branch
    }

    Activity.count({}).then((total) => {
      let activities = []
      let cursor = Activity.find(query).limit(limit).skip(skip).cursor().map((doc) => {
        return doc.toClient(partial)
      })

      cursor.on('data', (doc) => {
        activities.push(doc)
      })
      cursor.on('end', () => {
        res.json({
          total: total,
          offset: skip,
          count: activities.length,
          items: activities
        })
      })
      cursor.on('error', (err) => {
        next(createError.InternalServerError(err.message))
      })
    }).catch((err) => {
      next(createError.InternalServerError(err.message))
    })
  }

  createActivity(req, res, next) {
    const role = req.user.role

    // If user's role is not Executive or Administrator, return an error
    if (role !== 'executive' && role !== 'administrator') {
      return next(new createError.Forbidden())
    }

    // Create a new Activity template then assign it to a value in the req.body
    const Activity = this.db.Activity
    let activity = new Activity(req.body)

    // Save the activity (with promise) - If it doesnt, catch and throw error
    activity.save().then((newActivity) => {
      res.json(newActivity.toClient())
    }).catch((err) => {
      next(createError.InternalServerError(err.message))
    })
  }

  updateActivity(req, res, next) {
    const role = req.user.role

    // If user's role is not Executive or Administrator, return an error
    if (role !== 'executive' && role !== 'administrator') {
      return new createError.Forbidden()
    }

    // Do this here because Mongoose will add it automatically otherwise
    if (!req.body._id) {
      return next(createError.BadRequest('No _id given in body'))
    }

    let Activity = this.db.Activity
    let activityUpdates = null

    try {
      activityUpdates = new Activity(req.body)
    } catch (err) {
      return next(createError.BadRequest('Invalid data'))
    }

    Activity.findById(activityUpdates._id).then((foundActivity) => {
      if (!foundActivity) {
        return next(createError.NotFound(`Activity with _id ${_id} was not found`))
      }
      foundActivity.merge(activityUpdates)
      return foundActivity.save()
    }).then((savedActivity) => {
      res.json(savedActivity.toClient())
    }).catch((err) => {
      next(createError.InternalServerError(err.message))
    })
  }

  getActivity(req, res, next) {
    const Activity = this.db.Activity
    const _id = req.params._id

    Activity.findById(_id).then((activity) => {
      if (!activity) {
        return next(createError.NotFound(`Activity with _id ${_id} not found`))
      }

      res.json(activity.toClient())
    }).catch((err) => {
      next(createError.InternalServerError(err.message))
    })
  }

  deleteActivity(req, res, next) {
    const role = req.user.role

    // If user's role is not Executive or Administrator, return an error
    if (role !== 'executive' && role !== 'administrator') {
      return new createError.Forbidden()
    }

    const Activity = this.db.Activity
    const _id = req.params._id

    Activity.remove({ _id }).then((activity) => {
      if (!activity) {
        return next(createError.NotFound(`Activity with _id ${_id} not found`))
      }

      res.json({})
    }).catch((err) => {
      next(createError.InternalServerError(err.message))
    })
  }
}