#!/usr/bin/env python3
import deb822
import os
import os.path
from string import Template
class DebhelperLliurexMeta:
	def __init__(self):
		self.packages = []

	def getPackages(self):
		self.packages = []
		fdcontrol = open('debian/control','r')
		for stanza in deb822.Packages.iter_paragraphs(fdcontrol):
			if 'Package' in stanza:
				self.packages.append(stanza)
		fdcontrol.close()

	def writeFlavours(self):
		for package in self.packages:
			if not 'Lliurex-Flavours' in package:
				continue
			destfolder = os.path.join('debian',package['Package'],'usr','share','lliurex-cdd',package['Package'])
			if not os.path.exists(destfolder):
				os.makedirs(destfolder)
			fd = open(os.path.join(destfolder,'cddflavour'),'w')
			listflavours = [flavour.strip() for flavour in package['Lliurex-Flavours'].split(',')]
			for flavour in listflavours:
				fd.write(flavour+"\n")
			fd.close()

	def writePreinstFile(self):
		template = Template('''
			case "$1" in 
				install)
					echo " + $packageName \t $(date +"%x %R:%S")" >> /etc/lliurex-cdd-version
				;;
			esac
			''')
		for package in self.packages:
			destpath = os.path.join('debian',package['Package']+".preinst.debhelper")
			fd = open(destpath,'a')
			fd.write(template.safe_substitute(packageName=package['Package']))
			fd.close()

	def writePostrmFile(self):
		template = Template('''
			case "$1" in 
				remove)
					echo " - $packageName \t $(date +"%x %R:%S")" >> /etc/lliurex-cdd-version
				;;
			esac
			''')
		for package in self.packages:
			destpath = os.path.join('debian',package['Package']+".postrm.debhelper")
			fd = open(destpath,'a')
			fd.write(template.safe_substitute(packageName=package['Package']))
			fd.close()

	def run(self):
		self.getPackages()
		self.writeFlavours()
		self.writePreinstFile()
		self.writePostrmFile()

if __name__ == '__main__':
	dhllxmeta = DebhelperLliurexMeta()
	dhllxmeta.run()