#! /usr/bin/env python

#
# make thumbnails of all of the .jpg files ina directory
#

import sys, os, string
import Image
import ImageFilter

class DefaultOptions:
    size = 704
    
    # if true, just print messages about what the script would be doing
    # but don't actually do anything.
    noop = 0 

    # Print lots of messages
    verbose = 1

    #
    help = 0

    #
    # Some methods
    #

    def print_messages(self):
        return self.verbose or self.noop



options = DefaultOptions()



def create_directory(dir):
    '''Create the directory dir and its parent directories if necessary'''
    if os.path.isdir(dir):
	return
    parent, base = os.path.split(dir)
    create_directory(parent)
    try:
        if options.print_messages():
            print 'create directory %s' % dir
        if not options.noop:
            os.mkdir(dir, 0777)
    except os.error, exc:
        sys.stderr.write("can't create directory %s:%s\n" % (dir, exc))



def writeEntry(entryname, size):
    print "  <td> <div align=\"center\"> <a href=\""+entryname+"\"><img src=\"thumbs/"+entryname+"\" width=\"%d\" height=\"%d\" alt=\"image %s \" border=\"0\"></a> <br>Cap: %s </div> </td>" % (size[0], size[1], entryname, entryname)
    

def makethumb(jpegfile):
    if os.path.isfile("./thumbs/"+jpegfile):
        print "already have thumb for "+jpegfile
        return
    try:
        imfile = Image.open(jpegfile)
        bimage = imfile.filter(ImageFilter.SMOOTH)
        # bimage = imfile.filter(ImageFilter.BLUR)
        bimage.thumbnail((options.size, options.size))
        #bimage = fimage.transform((704,576), Image.AFFINE, (1,0,0,1,0,0), Image.BICUBIC)
        writeEntry(jpegfile,bimage.size)
        bimage.save("./thumbs/"+jpegfile, quality=100)
    except IOError, iio:
        sys.stderr.write("can't open image %s reason: %s\n" % (jpegfile,iio))
        return
    except os.error, exc:
        sys.stderr.write("can't create directory %s:%s\n" % (dir, exc))


def check_option(option, value):
    if value is None:
        sys.stderr.write('Value required for option %s\n' % option)
        sys.exit(1)

def parse_cmd_line():
    argv = sys.argv[1:]
    for arg in argv:
        if '=' in arg:
            arg, value = string.split(arg, '=', 1)
        else:
            value = None
        if arg in ('-h', '--help'):
            options.help = 1
        elif arg == '--noop':
            options.noop = 1
        elif arg == '-size':
            options.size = value
        else:
            sys.stderr.write('Unknown option %s\n' % arg)


def print_help():
    dict = opt.__class__.__dict__.copy()
    dict.update(opt.__dict__)
    dict['pyversion'] = sys.version[:3]
    print help_message % dict
    
help_message = """\
usage:
mkthumbs.py [options...]


Options:

        -h, --help

                Print this help message. Do nothing else

        --noop

                Do nothing. Just print messages about what would be
                done.
"""



def main():
    parse_cmd_line()
    if options.help:
        print_help()
    else:
        print "ready to rock"
        create_directory("./thumbs")
        files = os.listdir(os.curdir)
        for infile in files:
            ext = os.path.splitext(infile)[1]
            if ext == '.jpg':
                makethumb(infile)
                


if __name__ == '__main__':
    main()