#!/usr/bin/python

import rpm
import os
import sys
import getopt
import commands
from rpmUtils.miscutils import stringToVersion

DEFAULT_CMP="find $(pwd) -type f"
PROV="/tmp/osgi-prov.txt"
REQ="/tmp/osgi-req.txt"

# this function was take out of rpmdev-vercmp
def vercmp((e1, v1, r1), (e2, v2, r2)):
   rc = rpm.labelCompare((e1, v1, r1), (e2, v2, r2))
   return rc

def usage():
	print "This script check if osgideps.pl RPM deps generator can be activate on a given list of OSGI bundles.\n"
	print "Usage: osgideps-check [option]"
	print "	-h --help		show this help"
	print "	-c --command	command that print a list of file to stdin (e.g find /usr/shar/java -type f)"
	print "  -d --debug		run from '/tmp/osgi-prov.txt' and '/tmp/osgi-prov.txt' pre-builded file"

# parse params          
cmd = DEFAULT_CMP
debug = False                 
try:                                
	opts, args = getopt.getopt(sys.argv[1:], "hcd", ["help", "command=", "debug"]) 
except getopt.GetoptError:           
	usage()                          
	sys.exit(2)

for opt, arg in opts:
	if opt in ("-h", "--help"):
		usage()                     
		sys.exit()                  
	elif opt in ("-c", "--command"):
		cmd = arg  
	elif opt in ("-d", "--debug"):
		debug = True
		
if debug == False:
	cmd_req = "%s | /usr/lib/rpm/osgideps.pl -r | sort -u > %s" % (cmd, REQ)
	cmd_prov = "%s | /usr/lib/rpm/osgideps.pl -p | sort -u > %s" % (cmd, PROV)
	print "Running '%s'..." % cmd_req
	os.system(cmd_req)	
	print "Running '%s'..." % cmd_prov
	os.system(cmd_prov)

reqs = open(REQ, 'r')
for req in reqs:
	isProv = False
	reqIsNewerThanProv = False
	providedBundles = ""
	provs = open(PROV, 'r')
	for prov in provs:
		reqBundle = str(req).strip().split(" ")[0]
		provBundle = str(prov).strip().split(" ")[0]
		reqVersion = ""; provVersion = ""		
		if  reqBundle == provBundle:
			# TODO: This assume that provide without version match all requires and vis versa.
			# (I think that rpm work like that be I'm currently not 100% sure of that)
			try:
				reqVersion = str(req).strip().split(" ")[2].strip()
				provVersion = str(prov).strip().split(" ")[2].strip()
				reqCmp = str(req).strip().split(" ")[1].strip()
				provCmp = str(prov).strip().split(" ")[1].strip()
				(e1, v1, r1) = stringToVersion(provVersion)
				(e2, v2, r2) = stringToVersion(reqVersion)
				rc = vercmp((e1, v1, r1), (e2, v2, r2))
				# We stricly check version matching here.
				if (reqCmp == '=' and rc == 0) or (reqCmp == '>=' and rc >= 0):
					isProv = True
					exit
				else:
					isProv = False
					providedBundles = str(prov).strip() + " "
					reqIsNewerThanProv = True 
			except:
				isProv = True
				if (reqVersion.strip() != "" and provVersion.strip() != ""):
					print "ERROR: This script suck for '%s' bundle req:%s - prov:%s" % (reqBundle, reqVersion, provVersion)
	provs.close()
	if isProv == False:
		if reqIsNewerThanProv == True:
			print "ERROR: req:'%s' '%s' prov:'%s'" % (req.strip(), reqCmp, providedBundles) 
		else:	
			# We check if the osgi bundle is provided by osgi-system-package meta rpm package
			(status, output) = commands.getstatusoutput("rpm -q --whatprovides '%s' | grep osgi-system-package" % reqBundle) 
			if status != 0:
				print "ERROR: bundle '%s' not provided" % str(req).strip()
reqs.close()