#!/usr/bin/python
# Copyright (c) 2017 Chris Hoffman <christopher.hoffman@gmail.com>
# 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

from __future__ import annotations


DOCUMENTATION = r"""
module: npm
short_description: Manage node.js packages with npm
description:
  - Manage node.js packages with Node Package Manager (npm).
author: "Chris Hoffman (@chrishoffman)"
extends_documentation_fragment:
  - community.general.attributes
attributes:
  check_mode:
    support: full
  diff_mode:
    support: none
options:
  name:
    description:
      - The name of a node.js library to install.
    type: str
    required: false
  path:
    description:
      - The base path where to install the node.js libraries.
      - When O(global=true), then O(path) is not used to install the packages.
    type: path
    required: false
  version:
    description:
      - The version to be installed.
    type: str
    required: false
  global:
    description:
      - Install the node.js library globally.
      - When O(global=true), then O(path) is not used to install the packages.
    required: false
    default: false
    type: bool
  executable:
    description:
      - The executable location for npm.
      - This is useful if you are using a version manager, such as nvm.
    type: path
    required: false
  ignore_scripts:
    description:
      - Use the C(--ignore-scripts) flag when installing.
    required: false
    type: bool
    default: false
  unsafe_perm:
    description:
      - Use the C(--unsafe-perm) flag when installing.
    type: bool
    default: false
  ci:
    description:
      - Install packages based on package-lock file, same as running C(npm ci).
    type: bool
    default: false
  production:
    description:
      - Install dependencies in production mode, excluding devDependencies.
    required: false
    type: bool
    default: false
  registry:
    description:
      - The registry to install modules from.
    required: false
    type: str
  state:
    description:
      - The state of the node.js library.
    required: false
    type: str
    default: present
    choices: ["present", "absent", "latest"]
  no_optional:
    description:
      - Use the C(--no-optional) flag when installing.
    type: bool
    default: false
    version_added: 2.0.0
  no_bin_links:
    description:
      - Use the C(--no-bin-links) flag when installing.
    type: bool
    default: false
    version_added: 2.5.0
  force:
    description:
      - Use the C(--force) flag when installing.
    type: bool
    default: false
    version_added: 9.5.0
requirements:
  - npm installed in bin path (recommended /usr/local/bin)
"""

EXAMPLES = r"""
- name: Install "coffee-script" node.js package.
  community.general.npm:
    name: coffee-script
    path: /app/location

- name: Install "coffee-script" node.js package on version 1.6.1.
  community.general.npm:
    name: coffee-script
    version: '1.6.1'
    path: /app/location

- name: Install "coffee-script" node.js package globally.
  community.general.npm:
    name: coffee-script
    global: true

- name: Force Install "coffee-script" node.js package.
  community.general.npm:
    name: coffee-script
    force: true

- name: Remove the globally package "coffee-script".
  community.general.npm:
    name: coffee-script
    global: true
    state: absent

- name: Install "coffee-script" node.js package from custom registry.
  community.general.npm:
    name: coffee-script
    registry: 'http://registry.mysite.com'

- name: Install packages based on package.json.
  community.general.npm:
    path: /app/location

- name: Update packages based on package.json to their latest version.
  community.general.npm:
    path: /app/location
    state: latest

- name: Install packages based on package.json using the npm installed with nvm v0.10.1.
  community.general.npm:
    path: /app/location
    executable: /opt/nvm/v0.10.1/bin/npm
    state: present
"""

import json
import os
import re

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.community.general.plugins.module_utils.cmd_runner import CmdRunner, cmd_runner_fmt


class Npm:
    def __init__(self, module, **kwargs):
        self.module = module
        self.glbl = kwargs["glbl"]
        self.name = kwargs["name"]
        self.version = kwargs["version"]
        self.path = kwargs["path"]
        self.registry = kwargs["registry"]
        self.production = kwargs["production"]
        self.ignore_scripts = kwargs["ignore_scripts"]
        self.unsafe_perm = kwargs["unsafe_perm"]
        self.state = kwargs["state"]
        self.no_optional = kwargs["no_optional"]
        self.no_bin_links = kwargs["no_bin_links"]
        self.force = kwargs["force"]

        if kwargs["executable"]:
            self.executable = kwargs["executable"].split(" ")
        else:
            self.executable = [module.get_bin_path("npm", True)]

        if kwargs["version"] and kwargs["state"] != "absent":
            self.name_version = f"{self.name}@{kwargs['version']}"
        else:
            self.name_version = self.name

        self.runner = CmdRunner(
            module,
            command=self.executable,
            arg_formats=dict(
                exec_args=cmd_runner_fmt.as_list(),
                global_=cmd_runner_fmt.as_bool("--global"),
                production=cmd_runner_fmt.as_bool("--production"),
                ignore_scripts=cmd_runner_fmt.as_bool("--ignore-scripts"),
                unsafe_perm=cmd_runner_fmt.as_bool("--unsafe-perm"),
                name_version=cmd_runner_fmt.as_list(),
                registry=cmd_runner_fmt.as_opt_val("--registry"),
                no_optional=cmd_runner_fmt.as_bool("--no-optional"),
                no_bin_links=cmd_runner_fmt.as_bool("--no-bin-links"),
                force=cmd_runner_fmt.as_bool("--force"),
            ),
        )

    def _exec(self, args, run_in_check_mode=False, check_rc=True, add_package_name=True):
        if not self.module.check_mode or (self.module.check_mode and run_in_check_mode):
            # If path is specified, cd into that path and run the command.
            cwd = None
            if self.path:
                if not os.path.exists(self.path):
                    os.makedirs(self.path)
                if not os.path.isdir(self.path):
                    self.module.fail_json(msg=f"path {self.path} is not a directory")
                cwd = self.path

            params = dict(self.module.params)
            params["exec_args"] = args
            params["global_"] = self.glbl
            params["production"] = self.production and ("install" in args or "update" in args or "ci" in args)
            params["name_version"] = self.name_version if add_package_name else None

            with self.runner(
                "exec_args global_ production ignore_scripts unsafe_perm name_version registry no_optional no_bin_links force",
                check_rc=check_rc,
                cwd=cwd,
            ) as ctx:
                rc, out, err = ctx.run(**params)
            return out

        return ""

    def list(self):
        cmd = ["list", "--json", "--long"]

        installed = list()
        missing = list()
        data = {}
        try:
            data = json.loads(self._exec(cmd, True, False, False) or "{}")
        except getattr(json, "JSONDecodeError", ValueError) as e:
            self.module.fail_json(msg=f"Failed to parse NPM output with error {e}")
        if "dependencies" in data:
            for dep, props in data["dependencies"].items():
                if "missing" in props and props["missing"]:
                    missing.append(dep)
                elif "invalid" in props and props["invalid"]:
                    missing.append(dep)
                else:
                    installed.append(dep)
                    if "version" in props and props["version"]:
                        dep_version = f"{dep}@{props['version']}"
                        installed.append(dep_version)
            if self.name_version and self.name_version not in installed:
                missing.append(self.name)
        # Named dependency not installed
        else:
            missing.append(self.name)

        return installed, missing

    def install(self):
        return self._exec(["install"])

    def ci_install(self):
        return self._exec(["ci"])

    def update(self):
        return self._exec(["update"])

    def uninstall(self):
        return self._exec(["uninstall"])

    def list_outdated(self):
        outdated = list()
        data = self._exec(["outdated"], True, False)
        for dep in data.splitlines():
            if dep:
                # node.js v0.10.22 changed the `npm outdated` module separator
                # from "@" to " ". Split on both for backwards compatibility.
                pkg, other = re.split(r"\s|@", dep, maxsplit=1)
                outdated.append(pkg)

        return outdated


def main():
    arg_spec = dict(
        name=dict(type="str"),
        path=dict(type="path"),
        version=dict(type="str"),
        production=dict(default=False, type="bool"),
        executable=dict(type="path"),
        registry=dict(type="str"),
        state=dict(default="present", choices=["present", "absent", "latest"]),
        ignore_scripts=dict(default=False, type="bool"),
        unsafe_perm=dict(default=False, type="bool"),
        ci=dict(default=False, type="bool"),
        no_optional=dict(default=False, type="bool"),
        no_bin_links=dict(default=False, type="bool"),
        force=dict(default=False, type="bool"),
    )
    arg_spec["global"] = dict(default=False, type="bool")
    module = AnsibleModule(
        argument_spec=arg_spec,
        required_if=[
            ("state", "absent", ["name"]),
            ("global", False, ["path"]),
        ],
        supports_check_mode=True,
    )

    name = module.params["name"]
    path = module.params["path"]
    version = module.params["version"]
    glbl = module.params["global"]
    state = module.params["state"]

    npm = Npm(
        module,
        name=name,
        path=path,
        version=version,
        glbl=glbl,
        production=module.params["production"],
        executable=module.params["executable"],
        registry=module.params["registry"],
        ignore_scripts=module.params["ignore_scripts"],
        unsafe_perm=module.params["unsafe_perm"],
        state=state,
        no_optional=module.params["no_optional"],
        no_bin_links=module.params["no_bin_links"],
        force=module.params["force"],
    )

    changed = False
    if module.params["ci"]:
        npm.ci_install()
        changed = True
    elif state == "present":
        installed, missing = npm.list()
        if missing:
            changed = True
            npm.install()
    elif state == "latest":
        installed, missing = npm.list()
        outdated = npm.list_outdated()
        if missing:
            changed = True
            npm.install()
        if outdated:
            changed = True
            npm.update()
    else:  # absent
        installed, missing = npm.list()
        if name in installed:
            changed = True
            npm.uninstall()

    module.exit_json(changed=changed)


if __name__ == "__main__":
    main()