const express = require("express");
const DBUtils = require('../../Utils/DBUtil');
const Config = require('../../Config/Config');
const AuthUtil = require('../../Utils/AuthUtil');
// Logger
const Logger = require('../../Utils/Logger');

const TAG = '[FrameViewerRouter]'

const router = express.Router();

router.use((req, res, next) => {
  Logger.debug(TAG, 'Auth middleware');
  const token = req.get('token');
  Logger.debug(TAG, `Params ${JSON.stringify(req.params)}`)
  const frameId = req.params.frameId;
  if (!token) {
    res.status(403).json({
      message: 'Invalid access token'
    });
  } else {
    next();
  }
});

router.get('/frame/:frameId', (req, res) => {
  Logger.debug(TAG, 'GET: /frame/:frameId');
  const token = req.get('token');
  const frameId = req.params.frameId;
  DBUtils.Models.Frame.findOne({
    _id: frameId
  }, (err, doc) => {
    if (err) {
      res.status(400).json({
        message: err.message
      });
      return;
    } else if (!doc) {
      res.status(400).json({
        message: 'Unable to find a Frame with id: ' + frameId
      });
      return;
    }
    if(doc.viewerKeys.indexOf(token) == -1){
      res.status(403).json({
        message: 'Frame Viewer has no access to frame with id of: ' + frameId
      });
      return;
    }
    const frame = doc.toObject();
    /// lets get all images ids...
    DBUtils.Models.Photo.find({
        frame_id: frameId
      })
      .populate('user')
      .exec((err, docs) => {
        if (err) {
          res.status(400).json({
            message: err.message
          });
          return;
        }
        frame.photos = docs.map((p) => {
          return {
            photo_id: p._id,
            user: p.user,
            timestamp: p.timestamp
          };
        })
        res.json(frame);
      })
  });
});

router.get('/frame/:frameId/photo/:photoId', (req, res) => {
  Logger.debug(TAG, 'GET: /frame/:frameId/photo/:photoId');
  const token = req.get('token');
  const photoId = req.params.photoId;
  const frameId = req.params.frameId;
  DBUtils.Models.Frame.findOne({
    _id: frameId
  }, (err, frame) => {
    if (err) {
      res.status(500).json({
        message: 'DB error'
      })
      return;
    }
    if (frame) {
      if (frame.viewerKeys.indexOf(token) != -1) {
        req.frame = frame;
        DBUtils.Models.Photo.findOne({
          _id: photoId
        }, (err, doc) => {
          if (err) {
            res.status(400).json({
              message: err.message
            });
            return;
          }
          if (doc) res.contentType(doc.contentType).send(doc.photo);
          else res.status(400).json({
            message: 'Photo not found'
          });
        });
      } else {
        res.status(403).json({
          message: 'Frame Viewer has no access to frame with id of: ' + frameId
        });
      }
    }else{
      res.status(404).json({
        message: 'Unable to find frame with id of ' + frameId
      });
    }
  });
});

module.exports = router;