'use strict';

const express  = require('express')
	, router = express.Router()
	, utils = require('../utils.js')
	, Posts = require(__dirname+'/../models/posts.js')
	, Boards = require(__dirname+'/../models/boards.js')
	, uuidv4 = require('uuid/v4')
	, path = require('path')
	, fileUpload = require(__dirname+'/../helpers/file-upload.js')
	, fileThumbnail = require(__dirname+'/../helpers/file-thumbnail.js')
	, fileIdentify = require(__dirname+'/../helpers/file-identify.js')
	, fileCheckMimeType = require(__dirname+'/../helpers/file-check-mime-types.js')

// make new post
router.post('/board/:board', Boards.exists, async (req, res, next) => {

	// check if this is responding to an existing thread
	if (req.body.thread) {
		let thread;
		try {
			thread = await Posts.getThread(req.params.board, req.body.thread);
		} catch (err) {
			return res.status(500).json({ 'message': 'Error fetching from DB' });
		}
		if (!thread) {
			return res.status(400).json({ 'message': 'thread does not exist' })
		}
	}

	let files = [];
	// check for file
	if (req.files != null) {
		// get names and amounc
		const fileKeys = Object.keys(req.files);
		const numFiles = fileKeys.length
		// if we got a file
		if (numFiles > 0) {
			// check all mime types befoer we try saving anything
			for (let i = 0; i < numFiles; i++) {
				if (!fileCheckMimeType(req.files[fileKeys[i]].mimetype)) {
					return res.status(400).json({ 'message': 'Invalid file type' });
				}
			}
			// then upload, thumb, get metadata, etc.
			for (let i = 0; i < numFiles; i++) {
				const file = req.files[fileKeys[i]];
				const filename = uuidv4() + path.extname(file.name);
				// try to save, thumbnail and get metadata
				try {
					await fileUpload(req, res, filename);
					const fileData = await fileIdentify(filename);
					await fileThumbnail(filename);
					const processedFile = {
                        filename: filename,
                        originalFilename: file.name,
                        mimetype: file.mimetype,
                        filesize: file.size, // size in bytes
                        size: fileData.Filesize, // 123 Ki size formatted string
                        dimensions: fileData.size, // object with width and height pixels
                        geometry: fileData.Geometry, // 123 x 123 string
					}
					//handle gifs with multiple geometry and size
					if (Array.isArray(processedFile.size)) {
						processedFile.size = processedFile.size[0];
					}
					if (Array.isArray(processedFile.dimensions)) {
						processedFile.geometry = processedFile.dimensions[0];
					}
					if (Array.isArray(processedFile.geometry)) {
						processedFile.geometry = processedFile.geometry[0];
					}
					files.push(processedFile);
				} catch (err) {
					console.error(err);

					//TODO: DELETE FAILED FILES

					return res.status(500).json({ 'message': 'Error uploading file' });
				}
			}
		}
	}

	const data = {
        'author': req.body.author || 'Anonymous',
        'subject': req.body.subject || '',
        'date': new Date(),
        'content': req.body.content,
        'thread': req.body.thread || null,
        'files': files
    };

	const post = await Posts.insertOne(req.params.board, data)

	const redirect = '/' + req.params.board + '/thread/' + (req.body.thread || post.insertedId);

	return res.redirect(redirect);

});

// delete a post
router.delete('/board/:board/post/:id(\\d+)', Boards.exists, async (req, res, next) => {

});

// get recent threads and preview posts
router.get('/board/:board/recent/:page(\\d+)?', Boards.exists, async (req, res, next) => {

	//get the recently bumped thread & preview po	let threads;
	try {
		threads = await Posts.getRecent(req.params.board, req.params.page || 1);
	} catch (err) {
		return res.status(500).json({ 'message': 'Error fetching from DB' });
	}

	if (!threads || threads.lenth === 0) {
		return res.status(404).json({ 'message': 'Not found' });
	}

	return res.json(threads)

});

// get a thread
router.get('/board/:board/thread/:id(\\d+)', Boards.exists, async (req, res, next) => {

	//get the recently bumped thread & preview posts
	let thread;
	try {
		thread = await Posts.getThread(req.params.board, req.params.id);
	} catch (err) {
		return res.status(500).json({ 'message': 'Error fetching from DB' });
	}

	if (!thread) {
		return res.status(404).json({ 'message': 'Not found' });
	}

	return res.json(thread)

});

// get array of threads (catalog)
router.get('/board/:board/catalog', Boards.exists, async (req, res, next) => {

	//get the recently bumped thread & preview posts
	let data;
	try {
		data = await Posts.getCatalog(req.params.board);
	} catch (err) {
		return res.status(500).json({ 'message': 'Error fetching from DB' });
	}

	if (!data) {
		return res.status(404).json({ 'message': 'Not found' });
	}

	return res.json(data)

});

//get list of boards
router.get('/boards', Boards.exists, async (req, res, next) => {

	//get a list of boards
	let boards;
	try {
		boards = await Boards.find();
	} catch (err) {
		return res.status(500).json({ 'message': 'Error fetching from DB' })
	}

	//render the page
	res.json(boards)

});

/*
(async () => {
	await Boards.deleteIncrement('b');
	await Boards.deleteAll();
	await Boards.insertOne({
		_id: 'b',
		name: 'random',
		description: 'post anything here',
	})
	await Posts.deleteAll('b');
})();
*/

/*
(async () => {
	await Boards.deleteIncrement('b');
	await Boards.deleteAll();
	await Boards.insertOne({
		_id: 'b',
		name: 'random',
		description: 'post anything here',
	})
	await Posts.deleteAll('b');
	for (let i = 0; i < 3; i++) {
		const thread = await Posts.insertOne('b', {
			'author': 'Anonymous',
			'subject': 'subject',
			'date': new Date(),
			'content': Math.random().toString(36).replace(/[^a-z]+/g, ''),
			'thread': null
		})
		for (let j = 0; j < 5; j++) {
			await new Promise(resolve => {setTimeout(resolve, 500)})
			const post = await Posts.insertOne('b', {
				'author': 'Anonymous',
				'subject': 'subject',
				'date': new Date(),
				'content': Math.random().toString(36).replace(/[^a-z]+/g, ''),
				'thread': thread.insertedId + ''
			})
		}
	}
})();
*/


module.exports = router;