#-*- coding: utf-8 -*-

"""

 (c) 2015 - Copyright Red Hat Inc

 Authors:

   Pierre-Yves Chibon <pingou@pingoured.fr></pingou@pingoured.fr>

"""

import datetime

import json

import os

import random

import shutil

import string

import tempfile

import uuid

import pygit2

import progit.exceptions

import progit.notify

from progit.lib import model

def commit_to_patch(repo_obj, commits):

    ''' For a given commit (PyGit2 commit object) of a specified git repo,

    returns a string representation of the changes the commit did in a

    format that allows it to be used as patch.

    '''

    if not isinstance(commits, list):

        commits = [commits]

    patch = ""

    for cnt, commit in enumerate(commits):

        if commit.parents:

            diff = commit.tree.diff_to_tree()

            parent = repo_obj.revparse_single('%s^' % commit.oid.hex)

            diff = repo_obj.diff(parent, commit)

        else:

            # First commit in the repo

            diff = commit.tree.diff_to_tree(swap=True)

        subject = message = ''

        if '\n' in commit.message:

            subject, message = commit.message.split('\n', 1)

        else:

            subject = commit.message

        if len(commits) > 1:

            subject = '[PATCH %s/%s] %s' % (cnt + 1, len(commits), subject)

        patch += """From %(commit)s Mon Sep 17 00:00:00 2001

From: %(author_name)s <%(author_email)s>

Date: %(date)s

Subject: %(subject)s

%(msg)s

---

%(patch)s

""" % (

            {

                'commit': commit.oid.hex,

                'author_name': commit.author.name,

                'author_email': commit.author.email,

                'date': datetime.datetime.utcfromtimestamp(

                    commit.commit_time).strftime('%b %d %Y %H:%M:%S +0000'),

                'subject': subject,

                'msg': message,

                'patch': diff.patch,

            }

        )

    return patch

def write_gitolite_acls(session, configfile):

    ''' Generate the configuration file for gitolite for all projects

    on the forge.

    '''

    config = []

    for project in session.query(model.Project).all():

        if project.parent_id:

            config.append('repo forks/%s' % project.fullname)

        else:

            config.append('repo %s' % project.fullname)

        config.append('  R   = @all')

        config.append('  RW+ = %s' % project.user.user)

        for user in project.users:

            if user != project.user:

                config.append('  RW+ = %s' % user.user.user)

        config.append('')

        config.append('repo docs/%s' % project.fullname)

        config.append('  R   = @all')

        config.append('  RW+ = %s' % project.user.user)

        for user in project.users:

            if user != project.user:

                config.append('  RW+ = %s' % user.user.user)

        config.append('')

        config.append('repo tickets/%s' % project.fullname)

        config.append('  R   = @all')

        config.append('  RW+ = %s' % project.user.user)

        for user in project.users:

            if user != project.user:

                config.append('  RW+ = %s' % user.user.user)

        config.append('')

    with open(configfile, 'w') as stream:

        for row in config:

            stream.write(row + '\n')