import os
import re
import sys

args = sys.argv[1:]
if len(args) not in (2, 3, 4, 5):
    print 'Usage: get.py site name [index] [prefix] [number]'
    sys.exit()

number = None
if len(args) == 2:
    site, name = args
elif len(args) == 3:
    if args[2].isdigit():
        site, name, number = args
    else:
        site, name, prefix = args
elif len(args) == 4:
    site, name, prefix, number = args
elif len(args) == 5:
    site, name, index, prefix, number = args

logfile = open('log.txt', 'a')
print >>logfile, ' '.join(args)
logfile.close()

metafile = open('meta.txt', 'r')
for line in metafile:
    if line.strip() == site:
        break
meta = {}
for line in metafile:
    if not line.strip():
        break
    key, value = line.split()
    meta[key] = value
metafile.close()

if not os.path.exists(site):
    os.mkdir(site)

dir = os.path.join(site, name)
if os.path.isdir(dir):
    print 'Directory exists!'
    sys.exit()
os.mkdir(dir)

urlfilename = os.path.join(dir, 'url')
urlfile = open(urlfilename, 'w')
index_pattern = meta['Index']
argcount = index_pattern.count('%')
if argcount == 1: url = index_pattern % name
elif argcount == 2: url = index_pattern % (name, index)
print >>urlfile, url
urlfile.close()

image_pattern = meta['Image']
argcount = image_pattern.count('%')

number = number or meta['Number']
number = int(number)

for i in range(1, number+1):
    if argcount == 2: image = image_pattern % (name, i)
    elif argcount == 3: image = image_pattern % (name, prefix, i)
    filename = os.path.join(dir, '%02d.jpg' % i)
    command = 'curl -e %s -s %s -o %s &' % (url, image, filename)
    os.system(command)