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

"""

 (c) 2014 - Copyright Red Hat Inc

 Authors:

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

"""

import os

import shutil

import sqlalchemy as sa

import pygit2

import wtforms

from flask.ext import wtf

from sqlalchemy.orm import relation

from sqlalchemy.orm import backref

from progit.hooks import BaseHook

from progit.lib.model import BASE, Project

from progit import SESSION, APP, get_repo_path

class ProgitTable(BASE):

    """ Stores information about the progit hook deployed on a project.

    Table -- hook_progit

    """

    __tablename__ = 'hook_progit'

    id = sa.Column(sa.Integer, primary_key=True)

    project_id = sa.Column(

        sa.Integer,

        sa.ForeignKey('projects.id', onupdate='CASCADE'),

        nullable=False,

        unique=True,

        index=True)

    active = sa.Column(sa.Boolean, nullable=False, default=False)

    project = relation(

        'Project', remote_side=[Project.id],

        backref=backref(

            'progit_hook', cascade="delete, delete-orphan",

            single_parent=True)

        )

class ProgitForm(wtf.Form):

    ''' Form to configure the progit hook. '''

    active = wtforms.BooleanField(

        'Acive',

        [wtforms.validators.Optional()]

    )

class ProgitHook(BaseHook):

    ''' Progit hook. '''

    name = 'progit'

    form = ProgitForm

    db_object = ProgitTable

    backref = 'progit_hook'

    form_fields = ['active']

    @classmethod

    def install(cls, project, dbobj):

        ''' Method called to install the hook for a project.

        :arg project: a ``progit.model.Project`` object to which the hook

            should be installed

        '''

        repopath = get_repo_path(project)

        hook_files = os.path.join(

            os.path.dirname(os.path.realpath(__file__)), 'files')

        repo_obj = pygit2.Repository(repopath)

        # Install the hook itself

        shutil.copyfile(

            os.path.join(hook_files, 'progit_hook.py'),

            os.path.join(repopath, 'hooks', 'post-receive.progit')

        )

        os.chmod(os.path.join(repopath, 'hooks', 'post-receive.progit'), 0755)

    @classmethod

    def remove(cls, project):

        ''' Method called to remove the hook of a project.

        :arg project: a ``progit.model.Project`` object to which the hook

            should be installed

        '''

        repopath = get_repo_path(project)

        hook_path = os.path.join(repopath, 'hooks', 'post-receive.progit')

        if os.path.exists(hook_path):

            os.unlink(hook_path)