const Group = require("../models/group");
const System = require("../models/system");
const mongoose = require("mongoose");

//router.get('/system/:shortName/group/:groupId?', isLoggedIn, function(req, res) {

exports.getGroups = async function (req, res, next) {
  process.nextTick(async function () {
    const system = await System.findOne({ shortName: req.params.shortName.toLowerCase() });
    if (!system) {
      res.status(404);
      res.json({ success: false });
      return;
    }

    if (!system.userId.equals(req.user._id)) {
      res.status(401)
      res.json({
        success: false,
        message: "You are not the user associated with this system."
      });
      return;
    }

    if (req.params.groupId) {
      var groupId = req.params.groupId.toLowerCase();

      const group = await Group.findOne(
        {
          _id: new mongoose.Types.ObjectId(groupId),
          shortName: req.params.shortName.toLowerCase()
        },
        { sort: { position: -1 } });
      if (!group) {
        res.status(404);
        res.json({ success: false });
        return;

      } else {
        res.json(group);
        return;
      }
    } else {
      const group = await Group.find(
        {
          shortName: req.params.shortName.toLowerCase()
        }).sort("position").exec();
      if (!group) {
        res.status(404);
        res.json({ success: false });
        return;

      } else {
        let result = group;
        if (!Array.isArray(group)) {
          result = [group]
        }
        res.json(result);
        return;
      }
    }
  }
  );
};

exports.deleteGroup = async function (req, res, next) {
  const system = await System.findOne({ 'shortName': req.params.shortName.toLowerCase() }).catch(err => {

    console.error(err);
    res.status(500);
    res.json({ success: false, message: err });
    return;
  });
  if (!system) {
    console.error(err);
    res.status(404);
    res.json({
      success: false,
      message: "That Short Name does not exist."
    });
    return;
  }
  if (!system.userId.equals(req.user._id)) {
    res.status(401);
    res.json({
      success: false,
      message: "You are not the user associated with this system."
    });
    return;
  }
  await Group.findOneAndRemove({
    shortName: req.params.shortName.toLowerCase(),
    '_id': new mongoose.Types.ObjectId(req.params.groupId)
  }).catch(err => {
    res.status(500);
    res.json({
      success: false,
      message: err
    });
    return;
  });


  res.json({
    success: true
  });
  return;
}



exports.reorderGroups =  function (req, res, next) {

  //router.post('/system/:shortName/group_order', isLoggedIn, function(req, res) {
    process.nextTick(async function () {
    const system = await System.findOne({ shortName: req.params.shortName.toLowerCase() });

    if (!system) {
      res.status(404);
      res.json({
        success: false,
        message: "That Short Name does not exist."
      });
      return;
    }
    if (!system.userId.equals(req.user._id)) {
      res.status(401);
      res.json({
        success: false,
        message: "You are not the user associated with this system."
      });
      return;
    }

    if (!req.body.groupOrder) {
      res.status(500);
      res.json({
        success: false,
        message: "Order data is wrong."
      });
      return;
    }
    var groupOrder = JSON.parse(req.body.groupOrder);
    for (var i = 0; i < groupOrder.length; i++) {
      const group = await Group.findOneAndUpdate(
        {
          _id: new mongoose.Types.ObjectId(groupOrder[i]),
          shortName: req.params.shortName.toLowerCase()
        },
        {
          position: i
        },
        {
          new: true,
          upsert: false
        });
      if (!group) {
        res.status(404)
        res.json({
          success: false,
          message: err
        });

        console.log(
          "Error: Group Order - Shortname: " +
          req.params.shortName.toLowerCase()
        );
        return;
      }
    }
    res.json({
      success: true
    });
  });
};

exports.upsertGroup = function (req, res, next) {
  //router.post('/system/:shortName/group/:groupId?', isLoggedIn, function(req, res) {
  process.nextTick(async function () {
    let system = await System.findOne({ shortName: req.params.shortName.toLowerCase() });

    if (!system) {
      res.status(404);
      res.json({
        success: false,
        message: "That Short Name does not exist."
      });
      return;
    }
    if (!system.userId.equals(req.user._id)) {
      res.status(401);
      res.json({
        success: false,
        message: "You are not the user associated with this system."
      });
      return;
    }
    var message = "";
    var groupName = req.body.groupName.replace(/[^\w\s]/g, "");
    var talkgroups = JSON.parse(req.body.talkgroups);

    if (!talkgroups.length || !Array.isArray(talkgroups)) {
      message = "Talkgroups need to be selected, group can not be empty ";
    }
    if (!groupName.length) {
      message = message + "Group Name is required";
    }

    if (message.length) {
      res.json({
        success: false,
        message: message
      });
      return;
    }
    // if we got here, that means that everything is good for updating/inserting

    var groupId = req.params.groupId;

    let group = await Group.findOneAndUpdate(
      {
        _id: new mongoose.Types.ObjectId(groupId),
        shortName: req.params.shortName.toLowerCase()
      },
      {
        groupName: groupName,
        talkgroups: talkgroups
      },
      {
        new: true,
        upsert: true
      }).catch(err => {
        res.status(500);
        res.json({
          success: false,
          message: err
        });
        return;
      });
    res.json(group);
    return;

  }
  );
}