#!/usr/bin/python
# -*- coding: utf-8 -*-

# (c) 2014, Dimitrios Tydeas Mengidis <tydeas.dr@gmail.com>

# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.
#

DOCUMENTATION = '''
---
module: composer
author: Dimitrios Tydeas Mengidis
short_description: Dependency Manager for PHP
version_added: "1.6"
description:
    - Composer is a tool for dependency management in PHP. It allows you to declare the dependent libraries your project needs and it will install them in your project for you
options:
    command:
        description:
            - Composer command like "install", "update" and so option
        required: false
        default: install
    working_dir:
        description:
            - Directory of your project ( see --working-dir )
        required: true
        default: null
        aliases: [ "working-dir" ]
    prefer_source:
        description:
            - Forces installation from package sources when possible ( see --prefer-source )
        required: false
        default: "no"
        choices: [ "yes", "no" ]
        aliases: [ "prefer-source" ]
    prefer_dist:
        description:
            - Forces installation from package dist even for de versions ( see --prefer-dist )
        required: false
        default: "no"
        choices: [ "yes", "no" ]
        aliases: [ "prefer-dist" ]
    no_dev:
        description:
            - Disables installation of require-dev packages ( see --no-dev )
        required: false
        default: "yes"
        choices: [ "yes", "no" ]
        aliases: [ "no-dev" ]
    no_scripts:
        description:
            - Skips the execution of all scripts defined in composer.json ( see --no-scripts )
        required: false
        default: "no"
        choices: [ "yes", "no" ]
        aliases: [ "no-scripts" ]
    no_plugins:
        description:
            - Disables all plugins ( see --no-plugins )
        required: false
        default: "no"
        choices: [ "yes", "no" ]
        aliases: [ "no-plugins" ]
    optimize_autoloader:
        description:
            - Optimize autoloader during autoloader dump ( see --optimize-autoloader ). Convert PSR-0/4 autoloading to classmap to get a faster autoloader. This is recommended especially for production, but can take a bit of time to run so it is currently not done by default.
        required: false
        default: "yes"
        choices: [ "yes", "no" ]
        aliases: [ "optimize-autoloader" ]
requirements:
    - php
    - composer installed in bin path (recommended /usr/local/bin)
notes:
    - Default options that are always appended in each execution are --no-ansi, --no-progress, and --no-interaction
'''

EXAMPLES = '''
# Downloads and installs all the libs and dependencies outlined in the /path/to/project/composer.lock
- composer: command=install working_dir=/path/to/project
'''

import os
import re

def parse_out(string):
    return re.sub("\s+", " ", string).strip()

def has_changed(string):
    return (re.match("Nothing to install or update", string) != None)

def composer_install(module, command, options):
    php_path      = module.get_bin_path("php", True, ["/usr/local/bin"])
    composer_path = module.get_bin_path("composer", True, ["/usr/local/bin"])
    cmd           = "%s %s %s %s" % (php_path, composer_path, command, " ".join(options))

    return module.run_command(cmd)

def main():
    module = AnsibleModule(
        argument_spec = dict(
            command             = dict(default="install", type="str", required=False),
            working_dir         = dict(aliases=["working-dir"], required=True),
            prefer_source       = dict(default="no", type="bool", aliases=["prefer-source"]),
            prefer_dist         = dict(default="no", type="bool", aliases=["prefer-dist"]),
            no_dev              = dict(default="yes", type="bool", aliases=["no-dev"]),
            no_scripts          = dict(default="no", type="bool", aliases=["no-scripts"]),
            no_plugins          = dict(default="no", type="bool", aliases=["no-plugins"]),
            optimize_autoloader = dict(default="yes", type="bool", aliases=["optimize-autoloader"]),
        ),
        supports_check_mode=True
    )

    module.params["working_dir"] = os.path.abspath(module.params["working_dir"])

    options = set([])
    # Default options
    options.add("--no-ansi")
    options.add("--no-progress")
    options.add("--no-interaction")

    if module.check_mode:
        options.add("--dry-run")

    # Get composer command with fallback to default  
    command = module.params['command']
    del module.params['command'];

    # Prepare options
    for i in module.params:
        opt = "--%s" % i.replace("_","-")
        p = module.params[i]
        if isinstance(p, (bool)) and p:
            options.add(opt)
        elif isinstance(p, (str)):
            options.add("%s=%s" % (opt, p))

    rc, out, err = composer_install(module, command, options)

    if rc != 0:
        output = parse_out(err)
        module.fail_json(msg=output)
    else:
        output = parse_out(out)
        module.exit_json(changed=has_changed(output), msg=output)

# import module snippets
from ansible.module_utils.basic import *

main()