import Project from '../models/project';
import User from '../models/user';

export function createProject(req, res) {
  let projectValues = {
    user: req.user ? req.user._id : undefined // eslint-disable-line no-underscore-dangle
  };

  projectValues = Object.assign(projectValues, req.body);

  Project.create(projectValues, (err, newProject) => {
    if (err) { return res.json({ success: false }); }
    Project.populate(newProject,
      {path: 'user', select: 'username'},
      (innerErr, newProjectWithUser) => {
        if (innerErr) { return res.json({ success: false }); }
        return res.json(newProjectWithUser);
    });
  });
}

export function updateProject(req, res) {
  Project.findByIdAndUpdate(req.params.project_id,
    {
      $set: req.body
    })
    .populate('user', 'username')
    .exec((err, updatedProject) => {
      if (err) {
        console.log(err);
        return res.json({ success: false });
      }
      if (updatedProject.files.length !== req.body.files.length) {
        const oldFileIds = updatedProject.files.map(file => file.id);
        const newFileIds = req.body.files.map(file => file.id);
        const staleIds = oldFileIds.filter(id => newFileIds.indexOf(id) === -1);
        staleIds.forEach(staleId => {
          updatedProject.files.id(staleId).remove();
        });
        updatedProject.save((innerErr) => {
          if (innerErr) {
            console.log(innerErr);
            return res.json({ success: false });
          }
          return res.json(updatedProject);
        });
      }
      return res.json(updatedProject);
    });
}

export function getProject(req, res) {
  Project.findById(req.params.project_id)
    .populate('user', 'username')
    .exec((err, project) => {
      if (err) {
        return res.status(404).send({ message: 'Project with that id does not exist' });
      }
      return res.json(project);
    });
}

export function deleteProject(req, res) {
  Project.remove({_id: req.params.project_id}, (err) => {
    if (err) {
      return res.status(404).send({ message: 'Project with that id does not exist' });
    }
    return res.json({ success: true });
  });
}

export function getProjects(req, res) {
  if (req.user) {
    Project.find({user: req.user._id}) // eslint-disable-line no-underscore-dangle
      .sort('-createdAt')
      .select('name files id createdAt updatedAt')
      .exec((err, projects) => {
        res.json(projects);
      });
  } else {
    // could just move this to client side
    return res.json([]);
  }

}

export function getProjectsForUser(req, res) {
  if (req.params.username) {
    User.findOne({ username: req.params.username }, (err, user) => {
      Project.find({user: user._id}) // eslint-disable-line no-underscore-dangle
        .sort('-createdAt')
        .select('name files id createdAt updatedAt')
        .exec((err, projects) => {
          res.json(projects);
        });
    });
  } else {
    // could just move this to client side
    return res.json([]);
  }
}