#!/usr/bin/python
# Copyright (c) 2018, Ansible Project
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

# started out with AWX's scan_packages module

from __future__ import annotations

DOCUMENTATION = r"""
module: pip_package_info
short_description: Pip package information
description:
  - Return information about installed pip packages.
extends_documentation_fragment:
  - community.general.attributes
  - community.general.attributes.info_module
options:
  clients:
    description:
      - A list of the pip executables that are used to get the packages. They can be supplied with the full path or just the
        executable name, for example V(pip3.7).
    default: ['pip']
    required: false
    type: list
    elements: path
requirements:
  - pip >= 20.3b1 (necessary for the C(--format) option)
  - The requested C(pip) executables must be installed on the target.
author:
  - Matthew Jones (@matburt)
  - Brian Coca (@bcoca)
  - Adam Miller (@maxamillion)
"""

EXAMPLES = r"""
- name: Just get the list from default pip
  community.general.pip_package_info:

- name: Get the facts for default pip, pip2 and pip3.6
  community.general.pip_package_info:
    clients: ['pip', 'pip2', 'pip3.6']

- name: Get from specific paths (virtualenvs?)
  community.general.pip_package_info:
    clients: '/home/me/projec42/python/pip3.5'
"""

RETURN = r"""
packages:
  description: A dictionary of installed package data.
  returned: always
  type: dict
  contains:
    python:
      description: A dictionary with each pip client which then contains a list of dicts with python package information.
      returned: always
      type: dict
      sample:
        {
          "packages": {
            "pip": {
              "Babel": [
                {
                  "name": "Babel",
                  "source": "pip",
                  "version": "2.6.0"
                }
              ],
              "Flask": [
                {
                  "name": "Flask",
                  "source": "pip",
                  "version": "1.0.2"
                }
              ],
              "Flask-SQLAlchemy": [
                {
                  "name": "Flask-SQLAlchemy",
                  "source": "pip",
                  "version": "2.3.2"
                }
              ],
              "Jinja2": [
                {
                  "name": "Jinja2",
                  "source": "pip",
                  "version": "2.10"
                }
              ]
            }
          }
        }
"""

import json
import os

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.facts.packages import CLIMgr


class PIP(CLIMgr):
    def __init__(self, pip, module):
        self.CLI = pip
        self.module = module

    def list_installed(self):
        rc, out, err = self.module.run_command([self._cli, "list", "-l", "--format=json"])
        if rc != 0:
            raise Exception(f"Unable to list packages rc={rc} : {err}")
        return json.loads(out)

    def get_package_details(self, package):
        package["source"] = self.CLI
        return package


def main():
    # start work
    module = AnsibleModule(
        argument_spec=dict(
            clients=dict(type="list", elements="path", default=["pip"]),
        ),
        supports_check_mode=True,
    )
    packages = {}
    results = {"packages": {}}
    clients = module.params["clients"]

    found = 0
    for pip in clients:
        if not os.path.basename(pip).startswith("pip"):
            module.warn(f"Skipping invalid pip client: {pip}")
            continue
        try:
            pip_mgr = PIP(pip, module)
            if pip_mgr.is_available():
                found += 1
                packages[pip] = pip_mgr.get_packages()
        except Exception as e:
            module.warn(f"Failed to retrieve packages with {pip}: {e}")
            continue

    if found == 0:
        module.fail_json(msg=f"Unable to use any of the supplied pip clients: {clients}")

    # return info
    results["packages"] = packages
    module.exit_json(**results)


if __name__ == "__main__":
    main()