#!/usr/bin/env python3
"""
Contains helper functions for accessing the database.
"""
import os
from urllib import parse

import config


async def get_random_track(request):
	"""Selects a random track."""
	async with request.app.state.db_pool.acquire() as conn:
		track = await conn.fetchrow(
			"SELECT * FROM track ORDER BY random() LIMIT 1"
		)
	track = dict(track)
	fpath = track.pop('filepath')
	art256 = os.path.join(os.path.dirname(fpath), 'folder-256x256.jpg')
	art64 = os.path.join(os.path.dirname(fpath), 'folder-64x64.jpg')
	track['source'] = convert_filepath(fpath)
	track['artwork'] = [{
		'src': convert_filepath(art256),
		'sizes': '256x256',
		'type': 'image/jpeg'
		}, {
		'src': convert_filepath(art64),
		'sizes': '64x64',
		'type': 'image/jpeg'
		}
	]
	return track


def convert_filepath(path):
	"""Convert a filepath to a URL."""
	path = os.path.relpath(path, config.music_dir)
	path = config.server_homepage + '/library/' + path
	#path = parse.quote(path)
	return path