#!/usr/bin/env python

import glob
import os
import sys
import stat

chunked_dir = 'data/square_chunked'
ppdd_dir = 'data/square_chunked'

base_ppd = 1350

def run(command):
	print command
	if os.system(command):
		raise Exception, 'problem'

ppds = []

for ppd_dir in glob.glob('%s/*_PPD' % (ppdd_dir)):
	ppds.append(int(os.path.basename(ppd_dir)[:-4]))


for source_name in glob.glob('%s/*.tif' % (chunked_dir)):
	base_name = os.path.basename(source_name)[:-4]
	print base_name
	source_stats = os.stat(source_name)
	source_modified = source_stats[stat.ST_MTIME]

	for ppd in ppds:
		ppdd_name = '%s/%d_PPD/%s.jpg' % (ppdd_dir, ppd, base_name)
		print ppdd_name

		if os.path.exists(ppdd_name):
			ppdd_stats = os.stat(ppdd_name)			
			ppdd_modified = ppdd_stats[stat.ST_MTIME]

			# Has the source changed?
			if source_modified <= ppdd_modified:
				continue


		temp_name = ppdd_name + '.tmp'

		#run('gdal_translate -b 1 -b 2 -b 3 -outsize %d%% %d%% "%s" "%s"' % (
		#	ppd, ppd,
		run('convert -scale %d%% "%s" "JPG:%s"' % (
			ppd / base_ppd * 100,
			source_name, 
			temp_name,
		))

		run('mv -f "%s" "%s"' % (temp_name, ppdd_name))