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

"""

 (c) 2014-2016 - Copyright Red Hat Inc

 Authors:

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

"""

from __future__ import unicode_literals

import sqlalchemy as sa

import os

import pygit2

import subprocess

import wtforms

try:

    from flask_wtf import FlaskForm

except ImportError:

    from flask_wtf import Form as FlaskForm

from sqlalchemy.orm import relation

from sqlalchemy.orm import backref

from pagure.hooks import BaseHook, BaseRunner, RequiredIf

from pagure.lib.model import BASE, Project

class MailTable(BASE):

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

    Table -- hook_mail

    """

    __tablename__ = "hook_mail"

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

    project_id = sa.Column(

        sa.Integer,

        sa.ForeignKey("projects.id", onupdate="CASCADE", ondelete="CASCADE"),

        nullable=False,

        unique=True,

        index=True,

    )

    mail_to = sa.Column(sa.Text, nullable=False)

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

    project = relation(

        "Project",

        remote_side=[Project.id],

        backref=backref(

            "mail_hook",

            cascade="delete, delete-orphan",

            single_parent=True,

            uselist=False,

        ),

    )

class MailForm(FlaskForm):

    """ Form to configure the mail hook. """

    mail_to = wtforms.TextField("Mail to", [RequiredIf("active")])

    active = wtforms.BooleanField("Active", [wtforms.validators.Optional()])

class MailRunner(BaseRunner):

    @staticmethod

    def post_receive(session, username, project, repotype, repodir, changes):

        """ Run the multimail post-receive hook.

        For args, see BaseRunner.runhook.

        """

        if repotype != "main":

            # This hook is only useful on the main repo

            return

        # This may run on a temporary clone, but that doesn't matter.

        # We set these options every time again anyway

        repo_obj = pygit2.Repository(repodir)

        repo_obj.config.set_multivar(

            "multimailhook.mailingList", "", project.mail_to

        )

        repo_obj.config.set_multivar(

            "multimailhook.environment", "", "gitolite"

        )

        # Now just run the .py file as a git hook

        hook_file = os.path.join(

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

            "files",

            "git_multimail_upstream.py",

        )

        stdin = (

            "\n".join(

                [

                    "%s %s %s" % (changes[refname] + (refname,))

                    for refname in changes

                ]

            )

            + "\n"

        )

        proc = subprocess.Popen(

            [hook_file], cwd=repodir, stdin=subprocess.PIPE

        )

        proc.communicate(stdin)

        ecode = proc.wait()

        if ecode != 0:

            print("git_multimail failed")

            raise SystemExit(1)

class Mail(BaseHook):

    """ Mail hooks. """

    name = "Mail"

    description = (

        "Generate notification emails for pushes to a git "

        "repository. This hook sends emails describing changes introduced "

        "by pushes to a git repository."

    )

    form = MailForm

    db_object = MailTable

    backref = "mail_hook"

    form_fields = ["mail_to", "active"]

    runner = MailRunner