#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
debops-init: create a new DebOps project directory
"""
# Copyright (C) 2014-2015 Hartmut Goebel <h.goebel@crazy-compilers.com>
# Part of the DebOps - https://debops.org/

# This program is free software; you can redistribute
# it and/or modify it under the terms of the
# GNU General Public License as published by the Free
# Software Foundation; either version 3 of the License,
# or (at your option) any later version.
#
# This program is distributed in the hope that it will
# be useful, but WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General
# Public License along with this program; if not,
# write to the Free Software Foundation, Inc., 59
# Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# An on-line copy of the GNU General Public License can
# be downloaded from the FSF web page at:
# https://www.gnu.org/copyleft/gpl.html

from __future__ import print_function

import os
import codecs
import subprocess
import glob
import argparse

from debops import *
from debops.cmds import *

__author__ = "Hartmut Goebel <h.goebel@crazy-compilers.com>"
__copyright__ = "Copyright 2014-2015 by Hartmut Goebel <h.goebel@crazy-compilers.com>"
__licence__ = "GNU General Public License version 3 (GPL v3) or later"

SKEL_DIRS = (
    os.path.join("ansible", INVENTORY, "group_vars", "all"),
    os.path.join("ansible", INVENTORY, "host_vars"),
    os.path.join("ansible", "playbooks"),
    os.path.join("ansible", "roles"),
)

DEFAULT_DEBOPS_CONFIG = """
# -*- conf -*-

[paths]
;data-home: /opt/debops

[ansible defaults]
display_skipped_hosts = False
retry_files_enabled = False
;callback_plugins = /my/plugins/callback
;roles_path = /my/roles

[ansible paramiko]
;record_host_keys=True

[ansible ssh_connection]
;ssh_args = -o ControlMaster=auto -o ControlPersist=60s
"""

DEFAULT_GITIGNORE = """\
ansible/{SECRET_NAME}
{SECRET_NAME}
{ENCFS_PREFIX}{SECRET_NAME}
ansible.cfg

#-- python
*.py[co]

#-- vim
[._]*.s[a-w][a-z]
[._]s[a-w][a-z]
*.un~
Session.vim
.netrwhist
*~

#-- Emacs
\#*\#
/.emacs.desktop
/.emacs.desktop.lock
*.elc
auto-save-list
tramp
.\#*

#-- SublimeText
*.sublime-workspace
#*.sublime-project

#-- sftp configuration file
sftp-config.json
"""

HOSTS_FILE_HEADER = """\
# This is an Ansible inventory file in INI format. You can define a list of
# hosts and groups to be managed by this particular inventory.

# Hosts listed under [debops_all_hosts] will have common DebOps plays
# ran against them. It will include services such as iptables, DNS, Postfix,
# sshd configuration and more.
#
# View the list here:
# https://github.com/debops/debops-playbooks/blob/master/playbooks/common.yml
#
# You should check Getting Started guide for useful suggestions:
# https://docs.debops.org/en/latest/debops-playbooks/docs/guides/getting-started.html
"""

HOSTS_FILE_CONTENT_CONTROLER = """
# Your host is eligible to be managed by DebOps' common playbook. If you want
# that functionality and more, then uncomment your hostname below.

[debops_all_hosts]
#%s ansible_connection=local
""" % platform.node()

HOSTS_FILE_CONTENT_NO_CONTROLER = """
# Your host was not detected as compatible with DebOps playbooks, so you will
# not be able to leverage the above features on your current operating system.
# You can however use a virtual machine as the Ansible Controller.

[debops_all_hosts]

"""


def write_file(filename, *content):
    """
    If file:`filename` does not exist, create it and write
    var:`content` into it.
    """
    if not os.path.exists(filename):
        with open(filename, "w") as fh:
            fh.writelines(content)


def write_config_files(project_root):
    """
    Create the default debops-config files in the dir:`project_root`
    directory.
    """
    # Create .debops.cfg
    write_file(os.path.join(project_root, DEBOPS_CONFIG), DEFAULT_DEBOPS_CONFIG)
    # Create .gitignore
    write_file(os.path.join(project_root, '.gitignore'),
               DEFAULT_GITIGNORE.format(SECRET_NAME=SECRET_NAME, ENCFS_PREFIX=ENCFS_PREFIX))

    hosts_filename = os.path.join(project_root, "ansible", INVENTORY, "hosts")
    # Swap in different hosts file content depending on the host's OS/distro
    if (platform.system() == "Linux" and
        platform.linux_distribution()[0].lower() in ("debian", "ubuntu")):
        write_file(hosts_filename,
                   HOSTS_FILE_HEADER, HOSTS_FILE_CONTENT_CONTROLER)
    else:
        write_file(hosts_filename,
                   HOSTS_FILE_HEADER, HOSTS_FILE_CONTENT_NO_CONTROLER)


def main(project_root):
    orig_project_root = project_root
    project_root = os.path.abspath(project_root)

    #-- Check for existing debops project directory
    debops_project_root = find_debops_project(project_root, required=False)

    # Exit if DebOps configuration file has been found in project_dir
    if os.path.exists(os.path.join(project_root, DEBOPS_CONFIG)):
        error_msg("%s is already a DebOps project directory" % project_root)

    # Exit if we are in a DebOps project dir and nested project would be created
    if debops_project_root:
        error_msg("You are inside %s project already" % debops_project_root)

    #-- Main script

    print("Creating new DebOps project directory in", orig_project_root, "...")

    # Create base project directories
    for skel_dir in SKEL_DIRS:
        skel_dir = os.path.join(project_root, skel_dir)
        if not os.path.isdir(skel_dir):
            os.makedirs(skel_dir)
    # Write default config files
    write_config_files(project_root)


parser = argparse.ArgumentParser()
parser.add_argument('project_dir', default=os.curdir)
args = parser.parse_args()

try:
    main(args.project_dir)
except KeyboardInterrupt:
    raise SystemExit('... aborted')