#!/usr/bin/env python

"""Go image recognition"""

import sys
import os
import math
import argparse

try:
    import Image, ImageDraw
except ImportError, msg:
    print >> sys.stderr, msg
    sys.exit(1)

import im_debug
import linef
import manual
import intrsc
import gridf

def main():
    """Main function of the program."""
    
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('files', metavar='file', nargs='+',
                        help="image to analyse")
    parser.add_argument('-w', type=int, default=640,
                        help="scale image to the specified width before analysis")
    parser.add_argument('-m', '--manual', dest='manual_mode', action='store_true',
                        help="manual grid selection")
    parser.add_argument('-d', '--debug', dest='show_all', action='store_true',
                        help="show every step of the computation")
    parser.add_argument('-s', '--save', dest='saving', action='store_true',
                        help="save images instead of displaying them")
    parser.add_argument('-v', '--verbose', dest='verbose', action='store_true',
                        help="report progress")
    args = parser.parse_args()

    show_all = args.show_all
    verbose = args.verbose

    try:
        image = Image.open(args.files[0])
    except IOError, msg:
        print >> sys.stderr, msg
        return 1
    if image.mode == 'P':
        image = image.convert('RGB')
    
    if image.size[0] > args.w:
        image = image.resize((args.w, int((float(args.w)/image.size[0]) *
                              image.size[1])), Image.ANTIALIAS)
    do_something = im_debug.show
    if args.saving:
        do_something = imsave("saved/" + args.files[0][:-4] + "_" +
                               str(image.size[0]) + "/").save

    if args.manual_mode:
        try:
            lines = manual.find_lines(image)
        except manual.UserQuitError:
            #TODO ask user to try again
            return 1
    else:
        lines, l1, l2, bounds, hough = linef.find_lines(image, show_all, do_something, verbose)
        grid, lines = gridf.find(lines, image.size, l1, l2, bounds, hough, do_something)
        if show_all:
            im_g = image.copy()
            draw = ImageDraw.Draw(im_g)
            for l in grid[0] + grid[1]:
                draw.line(l, fill=(64, 255, 64), width=1)
            do_something(im_g)

    board = intrsc.board(image, lines, show_all, do_something)

    #simple ASCII output:
    for line in board:
        print ' '.join(line)
    
    if len(args.files) > 1:
        for f in args.files[1:]:
            try:
                image = Image.open(f)
            except IOError, msg:
                print >> sys.stderr, msg
                continue
            if image.mode == 'P':
                image = image.convert('RGB')
            board = intrsc.board(image, lines, show_all, do_something)
            for line in board:
                print ' '.join(line)

    return 0

class imsave():
    def __init__(self, saving_dir):
        self.saving_dir = saving_dir
        self.saving_num = 0

    def save(self, image, title=''):
        filename = self.saving_dir + "{0:0>2}".format(self.saving_num) + '.jpg'
        if not os.path.isdir(self.saving_dir):
            os.makedirs(self.saving_dir)
        image.save(filename, 'JPEG')
        self.saving_num += 1

if __name__ == '__main__':
    try:
        sys.exit(main())
    except KeyboardInterrupt:
        print "Interrupted."
        sys.exit()