#! /usr/bin/env python
# -*- coding: utf-8 -*-

import time
import cgi
import os
import sys
import datetime
import syslog

syslog.openlog('pigebox')

d = cgi.parse()

if not d:
    print 'Location: .'
    print ''
    print 'Hop'
    sys.exit(0)

end = '%s:%s' % (d.get('end_hour')[0], d.get('end_min')[0])

start = datetime.datetime.strptime('%s %s:%s' % (
        d.get('date')[0], d.get('start_hour')[0], d.get('start_min')[0]),
        '%d/%m/%Y %H:%M')
end = datetime.datetime.strptime('%s %s:%s' % (
        d.get('date')[0], d.get('end_hour')[0], d.get('end_min')[0]),
        '%d/%m/%Y %H:%M')
if end < start:
    end = end + datetime.timedelta(1)

os.chdir('/home/alsa-record/')

def get_filenames():
    path = start.strftime('%Y/%m-%b/%d-%a/')
    filenames = [os.path.join(path, x) for x in os.listdir(path)]
    if end.hour < start.hour:
        path = end.strftime('%Y/%m-%b/%d-%a/')
        if os.path.exists(path):
            filenames.extend([os.path.join(path, x) for x in os.listdir(path)])
    filenames.sort()

    filenames = [x for x in filenames if
                x >= start.strftime('%Y/%m-%b/%d-%a/%Hh%M') and 
                x < end.strftime('%Y/%m-%b/%d-%a/%Hh%M')]
    return filenames

while True:
    filenames = get_filenames()
    without_extension = [os.path.splitext(x)[0] for x in filenames]
    for f in without_extension:
        if without_extension.count(f) > 1:
            # currently encoding, wait a moment and try again
            print 'X-Currently-Encoding: please wait'
            time.sleep(5)
            break
    else:
        break

syslog.syslog(syslog.LOG_INFO, 'extraction (%s to %s)' % (
                        start.strftime('%Y-%m-%d %Hh%M'),
                        end.strftime('%Hh%M')))

if d.get('wav'):
    ext = 'wav'
    print 'Content-Type: audio/x-wav'
else:
    ext = 'ogg'
    print 'Content-Type: audio/ogg'

print 'Content-Disposition: attachment; filename=%s.%s\n' % \
                (start.strftime('%Y-%m-%d-%Hh%M') + end.strftime('-%Hh%M'), ext)

sys.stdout.flush()

if ext == 'ogg':
    command = ['sox'] + filenames + ['-t', 'ogg', '-C', '6', '-']
else:
    command = ['sox'] + filenames + ['-t', 'wav', '-']
os.system(' '.join(command))