---
- name: Initial Server Setup
  hosts: initial
  become: true

  vars_files:
    - ../user_vars.yml
  vars:
    password: Welcome1234
    ansible_managed: "This file is managed by Ansible. Do not modify."

  tasks:
    - name: Update + Upgrade packages
      ansible.builtin.apt:
        upgrade: true
        update_cache: true
      tags: basic

    - name: Install some basic packages
      ansible.builtin.apt:
        pkg:
          - sudo
          - git
          - vim
          - python3
          - python3-pip
      tags: basic

    # Change Hostname
    - name: "Update Hostnames"
      ansible.builtin.hostname:
        name: "{{ inventory_hostname }}"
      tags: hostname

    # Update /etc/hosts
    - name: Make sure an IPV4 entry in /etc/hosts exists
      ansible.builtin.lineinfile:
        path: /etc/hosts
        regexp: "^{{ ansible_default_ipv4.address }}"
        line: "{{ ansible_default_ipv4.address }} {{ inventory_hostname }} {{ inventory_hostname }}.freifunk.lu"
        state: present
      tags: network,hostname,dns
    - name: Make sure an IPV6 entry in /etc/hosts exists
      ansible.builtin.lineinfile:
        path: /etc/hosts
        regexp: "^{{ ansible_default_ipv6.address }}"
        line: "{{ ansible_default_ipv6.address }} {{ inventory_hostname }} {{ inventory_hostname }}.freifunk.lu"
        state: present
      tags: network,hostname,dns

    # SSH security improvements (EmptyPass, PassAuth, RootLogin)
    - name: Disable SSH Password Auth
      ansible.builtin.copy:
        dest: /etc/ssh/sshd_config.d/disable_password_auth.conf
        owner: root
        mode: u=rw,g=r,o=r
        content: |
          # {{ ansible_managed }}
          PasswordAuthentication no
      tags: network,ssh
      register: pass_auth
    - name: Remove SSH Password Auth from sshd_config
      ansible.builtin.lineinfile:
        path: /etc/ssh/sshd_config
        regex: "^PasswordAuthentication"
        line: "# PasswordAuthentication No"
      tags: network,ssh
      register: pass_auth_sshd
    - name: Disable SSH Empty Password
      ansible.builtin.copy:
        dest: /etc/ssh/sshd_config.d/disable_empty_password.conf
        owner: root
        mode: u=rw,g=r,o=r
        content: |
          # {{ ansible_managed }}
          PermitEmptyPasswords no
      tags: network,ssh
      register: empty_pass
    - name: Remove SSH Empty Password from sshd_config
      ansible.builtin.lineinfile:
        path: /etc/ssh/sshd_config
        regex: "^PermitEmptyPasswords"
        line: "# PermitEmptyPasswords No"
      tags: network,ssh
      register: empty_pass_sshd
    - name: Disable SSH Root Login
      ansible.builtin.copy:
        dest: /etc/ssh/sshd_config.d/disable_root_login.conf
        owner: root
        mode: u=rw,g=r,o=r
        content: |
          # {{ ansible_managed }}
          PermitRootLogin no
      tags: network,ssh
      register: root_login
    - name: Remove SSH Root Login from sshd_config
      ansible.builtin.lineinfile:
        path: /etc/ssh/sshd_config
        regex: "^PermitRootLogin"
        line: "# PermitRootLogin No"
      tags: network,ssh
      register: root_login_sshd
    - name: Reload SSHD
      ansible.builtin.service:
        name: "sshd"
        state: "reloaded"
      tags: network,ssh
      when: pass_auth.changed or pass_auth_sshd.changed or empty_pass.changed or empty_pass_sshd.changed or root_login.changed or root_login_sshd.changed

    # Create Freifunk Users
    - name: Create member users
      ansible.builtin.user:
        name: "{{ item.username }}"
        password: "{{ password | password_hash('sha512') }}"
        update_password: "on_create"
        groups:
          - sudo
        append: true
        shell: /bin/bash
        state: present
      loop: "{{ users_member }}"
      tags: users
    - name: Create system users (no password)
      ansible.builtin.user:
        name: "{{ item.username }}"
        groups:
          - sudo
        append: true
        shell: /bin/bash
        state: present
      loop: "{{ users_system }}"
      tags: users
    - name: Change shell for root to bash
      ansible.builtin.user:
        name: "root"
        shell: /bin/bash
      tags: users
    - name: Add color etc. into root bashrc
      ansible.builtin.blockinfile:
        marker: "# {mark} ANSIBLE MANAGED BLOCK / Enhanced root bashrc"
        block: "{{ lookup('ansible.builtin.file', '{{ server_config_dir }}/bashrc_root_config') }}"
        path: /root/.bashrc
      tags: users


    - name: Add SSH key for users from vars
      ansible.posix.authorized_key:
        user: "{{ item.username }}"
        state: present
        key: "{{ lookup('file', item.key_path) }}"
      tags: users
      loop: "{{ users_member | union(users_system) }}"

    - name: Allow for password-less sudo
      # Not done via community.general.sudoders because it does not support
      # sudo-ing into users without a passsword.
      ansible.builtin.copy:
        dest: /etc/sudoers.d/passwordless-sudo
        content: '%sudo   ALL=(ALL:ALL) NOPASSWD: ALL'
        owner: root
        group: root
        mode: '0440'
      tags: users