---
# Bootstrap nového Ubuntu serveru
# - aktualizace systému
# - deploy user (UID 1000)
# - SSH hardening
# - UFW firewall
# - fail2ban
# - Docker
#
# Použití:
#   ansible-playbook -i inventory.yml playbooks/bootstrap-server.yml
#
- name: Bootstrap home server
  hosts: homeservers
  become: true
  gather_facts: true

  vars:
    deploy_user: deploy
    deploy_uid: 1000
    ssh_port: 22
    deploy_ssh_key: "{{ lookup('file', '~/.ssh/id_ed25519.pub') }}"

  tasks:
    - name: Update apt cache
      ansible.builtin.apt:
        update_cache: true
        cache_valid_time: 3600

    - name: Upgrade all packages
      ansible.builtin.apt:
        upgrade: dist
        update_cache: true

    - name: Install base packages
      ansible.builtin.apt:
        name:
          - curl
          - wget
          - git
          - vim
          - htop
          - ca-certificates
          - gnupg
          - ufw
          - fail2ban
          - bash-completion
        state: present

    - name: Set timezone
      community.general.timezone:
        name: "{{ timezone }}"

    - name: Create deploy user
      ansible.builtin.user:
        name: "{{ deploy_user }}"
        uid: "{{ deploy_uid }}"
        shell: /bin/bash
        create_home: true
        password: ""

    - name: Setup authorized_keys for deploy user
      ansible.posix.authorized_key:
        user: "{{ deploy_user }}"
        state: present
        key: "{{ deploy_ssh_key }}"

    - name: Allow deploy user sudo without password
      ansible.builtin.copy:
        dest: "/etc/sudoers.d/{{ deploy_user }}"
        content: "{{ deploy_user }} ALL=(ALL) NOPASSWD:ALL\n"
        mode: "0440"

    - name: SSH hardening
      ansible.builtin.lineinfile:
        path: /etc/ssh/sshd_config
        regexp: "^#?{{ item.key }}"
        line: "{{ item.key }} {{ item.value }}"
        state: present
      loop:
        - { key: "Port", value: "{{ ssh_port }}" }
        - { key: "PermitRootLogin", value: "no" }
        - { key: "PasswordAuthentication", value: "no" }
        - { key: "X11Forwarding", value: "no" }
        - { key: "ClientAliveInterval", value: "300" }
        - { key: "ClientAliveCountMax", value: "2" }
      notify: Restart ssh

    - name: Configure UFW defaults
      community.general.ufw:
        direction: incoming
        policy: deny
      notify: Reload ufw

    - name: Allow SSH through UFW
      community.general.ufw:
        rule: allow
        port: "{{ ssh_port }}"
        proto: tcp

    - name: Allow HTTP and HTTPS through UFW
      community.general.ufw:
        rule: allow
        port: "{{ item }}"
        proto: tcp
      loop:
        - "80"
        - "443"

    - name: Enable UFW
      community.general.ufw:
        state: enabled

    - name: Configure fail2ban
      ansible.builtin.copy:
        dest: /etc/fail2ban/jail.local
        content: |
          [DEFAULT]
          bantime  = 1h
          findtime = 10m
          maxretry = 5

          [sshd]
          enabled = true
          port    = {{ ssh_port }}
          filter  = sshd
          logpath = /var/log/auth.log
          maxretry = 3
        mode: "0644"
      notify: Restart fail2ban

  handlers:
    - name: Restart ssh
      ansible.builtin.service:
        name: sshd
        state: restarted

    - name: Reload ufw
      community.general.ufw:
        state: reloaded

    - name: Restart fail2ban
      ansible.builtin.service:
        name: fail2ban
        state: restarted