const express = require("express");
const DBUtils = require('../../Utils/DBUtil')
const AuthUtil = require('../../Utils/AuthUtil')
const bodyParser = require('body-parser');
const FrameLinker = require('../../FrameLinker/FrameLinker')
const uuidv4 = require('uuid/v4');
// Logger
const Logger = require('../../Utils/Logger');

const TAG = '[AccountRouter]'

const router = express.Router();

router.use(bodyParser.raw({
  uploadDir: '/tmp/uploads',
  keepExtensions: true,
  limit: '5mb',
  type: 'image/*'
}))

router.use((req, res, next) => {
  const token = req.get('token');
  Logger.debug(TAG, 'Auth middleware check');
  AuthUtil.getAccountByToken(token)
    .then(account => {
      req.account = account
      Logger.debug(TAG, 'Auth middleware check - Success');
      next()
    })
    .catch((reason) => {
      Logger.debug(TAG, 'Auth middleware check - Fail');
      res.status(401).json({
        message: reason
      });
    })
});

router.get('/:frameId', (req, res) => { // by Frame Id
  Logger.debug(TAG, 'GET: /:frameId');
  const token = req.get('token');
  const frameId = req.params.frameId;
  const account = req.account;
  if (account.frames.indexOf(frameId) >= 0) {
    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;
      }
      const frame = doc.toObject();
      delete frame.viewerKeys
      /// 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);
        })
    });
  } else {
    res.status(403).json({
      message: 'Account has no access to frame with id of: ' + frameId
    });
  }
})

router.post('/create', (req, res) => {
  Logger.debug(TAG, 'GET: /create');
  const token = req.get('token');
  const body = req.body;
  if (!body.name) {
    res.status(400).json({
      message: 'Must provide a name for your new frame'
    });
    return;
  }
  const account = req.account;
  // If account valid - create new frame
  const frame = new DBUtils.Models.Frame({
    name: body.name,
    admin: account._id,
    members: [account._id]
  });
  // save frame
  frame.save((err, doc) => {
    if (err) {
      res.status(400).json({
        message: err.message
      });
      return;
    }
    // frame created - now add its id to the account object
    account.frames.push(doc._id);
    account.save((err) => {
      if (err) throw err;
      res.status(201).json(frame);
    })
  })

});

router.post('/:frameId/upload/photo', (req, res) => {
  Logger.debug(TAG, 'POST: /:frameId/upload/photo');
  const token = req.get('token');
  const account = req.account;
  const frameId = req.params.frameId;
  if (account.frames.indexOf(frameId) >= 0) {
    // User can upload image to the frame
    AuthUtil.getUserByAccountId(account._id)
      .then((user) => {
        // Upload Photo...
        const photo = new DBUtils.Models.Photo({
          frame_id: frameId,
          photo: req.body,
          timestamp: Date.now(),
          contentType: req.get('Content-Type'),
          user: user._id
        });

        // Save photo
        photo.save((err) => {
          if (err) {
            res.status(400).json({
              message: err.message
            });
            return;
          }
          res.status(201).json(photo)
        });
      })
      .catch(reason => {
        res.status(500).json({
          message: 'Unexpected error: ' + reason
        });
      })
  } else {
    res.status(403).json({
      message: 'Account has no access to frame with id of: ' + frameId
    });
  }
});
router.post('/:frameId/link', (req, res) => {
  Logger.debug(TAG, 'POST: /:frameId/link');
  const token = req.get('token');
  const frameId = req.params.frameId;
  const account = req.account;
  const frameViewerKey = req.body.key;
  if(FrameLinker.isKeyValid(frameViewerKey)){
    if(account.frames.indexOf(frameId) == -1){
      res.status(403).json({
        message: 'Account has no access to this frame'
      });
      return;
    }
    // lets create an access token;
    const accessToken = uuidv4();
    DBUtils.Models.Frame.findOne({_id: frameId}, (err, frame)=>{
      if (err) {
        res.status(400).json({
          message: err.message
        });
        return;
      }
      frame.viewerKeys.push(accessToken);
      FrameLinker.linkFrame(frameId, accessToken ,frameViewerKey)
        .then(()=>{
          frame.save((err)=>{
            if(err){
              res.status(400).json({
                message: 'Something went wrong...'
              });
              return;
            }
            res.status(201).json({message: 'Success'});
          })
        })
        .catch((reason)=>{
          res.status(400).json({message:reason});
        })
    })

  }else{
    res.status(404).json({
      message: 'Unable to find a frame viewer with key: ' + frameViewerKey
    });
  }
});
router.get('/:frameId/download/photo/:photoId', (req, res) => {
  Logger.debug(TAG, 'GET: /:frameId/download/photo/:photoId');
  const token = req.get('token');
  const photoId = req.params.photoId;
  const frameId = req.params.frameId;
  const account = req.account;

  if (account.frames.indexOf(frameId) >= 0) {
    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: 'Account has no access to frame with id of: ' + photoId
    });
  }
})


module.exports = router;