#!/usr/bin/python


import optparse
import os
import subprocess
import sys

# wrapper script to make it a little easier to track git repo's of func
# 
## Copyright 2008, Adrian Likins <alikins@redhat.com>
##
## This software may be freely redistributed under the terms of the GNU
## general public license.
##


#REPOS=$(git-config --file gum.config --get-regexp "remote\..*\.url" | cut -f2 -d' ')
#echo $REPOS

def get_remotes():
    pass


def find_new_branches(remote):
    pass

def find_all_new_branches(remotes):
    pass


# ugh, what is it with me and software that involces "repos"? -akl
class Repos(object):
    remotes = {}
    def __init__(self):
        self.remotes = {}
        self.local_config = {}
        self.parse_config(filename="gum.config",
                          config=self.remotes)
        self.parse_config(filename=".git/config",
                          config=self.local_config)

    def parse_config(self, filename=None, config={}):
        file_arg = ""
        if filename:
            file_arg = "--file %s" % filename
        cmd = "git-config %s --get-regexp 'remote\..*\.url'" % file_arg
        p = subprocess.Popen(cmd,  shell=True,
                             stdin=subprocess.PIPE, stdout=subprocess.PIPE)
        output = p.communicate()
        lines = output[0].splitlines()

        for line in lines:
            (name_blurb, url) = line.split()
            # uh yeah, this should be a regex of something. 
            name = name_blurb.split('.')[1]
            config[name] = url

    def find_remote_branches(self, name):
        remote_branches = []
        branches_cmd = "git-ls-remote -h %s" % self.remotes[name]
        p = subprocess.Popen(branches_cmd,  shell=True,
                             stdin=subprocess.PIPE, stdout=subprocess.PIPE)
        output = p.communicate()[0]
 #           print "output", output
        branch_names = output.splitlines()
        for branch_name_bits in branch_names:
            #                print branch_name
            bits = branch_name_bits.split()
            #                print bits
            # it's not really a path, but it looks enough like it
            branch_name = os.path.basename(bits[1])
            #               print "name: %s branch_name %s" % (name, branch_name)
            #                print branch_name
            remote_branches.append(branch_name)

        return remote_branches

    def find_remotes_branches(self, names):
        remote_branches = {}
        for name in names:
            branches = self.find_remote_branches(name)
            for branch in branches:
                if not remote_branches.has_key(name):
                    remote_branches[name] = []
                remote_branches[name].append(branch)

        return remote_branches


    def show_remote_branches(self):
        branches = self.find_remotes_branches(self.names())

        for repo in branches.keys():
            for branch in branches[repo]:
                print "%s/%s" % (repo, branch)

    # see if we are already cofigured for a remote
    def remote_exists(self, name):
        if self.local_config.has_key(name):
            print "remote exists", name
            return True
        return False

    # see if we are already configure for a branch
    def branch_exists(self, name):
        pass

    def add_remote(self, names):
        print "add_remote", names
        for name in names:
            if not self.remote_exists(name):
                print "name", name, "self.remotes[name]", self.remotes[name]
                add_cmd = "git remote add %s %s" % (name, self.remotes[name])
                p = subprocess.Popen(add_cmd,  shell=True,
                                     stdin=subprocess.PIPE, stdout=subprocess.PIPE)
                output = p.communicate()
            
                fetch_cmd = "git fetch %s" % name
                p = subprocess.Popen(fetch_cmd,  shell=True,
                                     stdin=subprocess.PIPE, stdout=subprocess.PIPE)
                output = p.communicate()
            else:
                print "%s is already added to the local git config" % name
            
            branches = self.find_remote_branches(name)
            print "add_remote branches", branches

            for branch in branches:
                add_branch_cmd = "echo git checkout -b  %s-%s %s/%s " % (name, branch, name, branch) 
                p = subprocess.Popen(add_branch_cmd,  shell=True,
                                     stdin=subprocess.PIPE, stdout=subprocess.PIPE)
                output = p.communicate()
                print add_branch_cmd, output




    def list_remotes(self):
        for name in self.remotes.keys():
            print name, self.remotes[name]

    def names(self):
        return self.remotes.keys()

# parse args
# "parse" gum.conf
#

#options
#   list-remotes
#   list-branches
#   add [remote]
#       (adds branches automatically)
#       --all
#       (adds all remotes we know about, and all branches)
#
#   update remote
#       (adds any new branches)
#
#   orphans [remote]
#       (shows any branches that are local that no longer exist remotely)
#



def main(args):
    parser = optparse.OptionParser()
    parser.add_option("-a","--add",
                      help="add a remote repo",
                      action="store_true",
                      dest="add",
                      default=False)
    parser.add_option("-A","--add-all",
                      help="add a remote repo",
                      action="store_true",
                      dest="add_all",
                      default=False)
    parser.add_option("-l","--list",
                      help="list remote repos",
                      action="store_true",
                      dest="list_remote",
                      default=False)
    parser.add_option("-L","--list-branches",
                      help="list remote repos and branches",
                      action="store_true",
                      dest="list_remote_branches",
                      default=False)
    
    parser.add_option("-u","--update",
                      help="update remote repos",
                      action="store_true",
                      dest="update_remote",
                      default=False)

    
    (options,args) = parser.parse_args()


    repos = Repos()

    if options.add:
        repos.add_remote(args)
        
    if options.add_all:
        repos.add_remote(repos.names())

    if options.list_remote:
        repos.list_remotes()

    if options.list_remote_branches:
        repos.show_remote_branches()
#        repos.find_remote_branches(repos.names())

if __name__ == "__main__":
    main(sys.argv)