---
# Initial server setup playbook for fresh Netcup VPS
# Configures security, creates deploy user, and prepares server
# Run once on fresh server installation

- name: Initial Server Setup for Custom PHP Framework
  hosts: web_servers
  become: true
  gather_facts: true
  
  vars:
    deploy_user: "{{ deploy_user_name | default('deploy') }}"
    deploy_user_shell: /bin/bash
    
  pre_tasks:
    - name: Verify this is a fresh server setup
      assert:
        that:
          - fresh_server_setup is defined and fresh_server_setup == true
          - create_deploy_user is defined and create_deploy_user == true
        fail_msg: "This playbook is only for fresh server setup. Set fresh_server_setup=true to continue."
      tags: always

    - name: Update apt cache
      apt:
        update_cache: true
        cache_valid_time: 3600
      tags: system

  tasks:
    # System Updates and Basic Packages
    - name: Upgrade all packages
      apt:
        upgrade: full
        autoremove: true
        autoclean: true
      tags: system

    - name: Install essential packages
      apt:
        name:
          - curl
          - wget
          - git
          - unzip
          - zip
          - vim
          - htop
          - tree
          - rsync
          - ca-certificates
          - gnupg
          - lsb-release
          - software-properties-common
          - apt-transport-https
          - ufw
          - fail2ban
        state: present
      tags: system

    # User Management
    - name: Create deploy user
      user:
        name: "{{ deploy_user }}"
        comment: "Deployment user for Custom PHP Framework"
        shell: "{{ deploy_user_shell }}"
        home: "/home/{{ deploy_user }}"
        create_home: true
        groups: "{{ deploy_user_groups | default(['sudo']) }}"
        append: true
      tags: users

    - name: Set up authorized_keys for deploy user
      authorized_key:
        user: "{{ deploy_user }}"
        state: present
        key: "{{ lookup('file', ansible_ssh_private_key_file + '.pub') }}"
        comment: "Deploy key for {{ deploy_user }}@{{ inventory_hostname }}"
      tags: users

    - name: Allow deploy user sudo without password
      lineinfile:
        dest: /etc/sudoers.d/{{ deploy_user }}
        line: "{{ deploy_user }} ALL=(ALL) NOPASSWD:ALL"
        state: present
        mode: '0440'
        create: true
        validate: 'visudo -cf %s'
      tags: users

    # SSH Security Hardening
    - name: Configure SSH security
      lineinfile:
        dest: /etc/ssh/sshd_config
        regexp: "{{ item.regexp }}"
        line: "{{ item.line }}"
        backup: true
      loop:
        - { regexp: '^#?PasswordAuthentication', line: 'PasswordAuthentication no' }
        - { regexp: '^#?PubkeyAuthentication', line: 'PubkeyAuthentication yes' }
        - { regexp: '^#?PermitRootLogin', line: 'PermitRootLogin prohibit-password' }
        - { regexp: '^#?PermitEmptyPasswords', line: 'PermitEmptyPasswords no' }
        - { regexp: '^#?MaxAuthTries', line: 'MaxAuthTries 3' }
        - { regexp: '^#?ClientAliveInterval', line: 'ClientAliveInterval 300' }
        - { regexp: '^#?ClientAliveCountMax', line: 'ClientAliveCountMax 2' }
      notify: restart sshd
      tags: security

    - name: Restrict SSH to specific users
      lineinfile:
        dest: /etc/ssh/sshd_config
        line: "AllowUsers root {{ deploy_user }}"
        state: present
      notify: restart sshd
      tags: security

    # Firewall Configuration
    - name: Configure UFW default policies
      ufw:
        policy: "{{ item.policy }}"
        direction: "{{ item.direction }}"
      loop:
        - { policy: 'deny', direction: 'incoming' }
        - { policy: 'allow', direction: 'outgoing' }
      tags: firewall

    - name: Allow SSH through firewall
      ufw:
        rule: allow
        name: OpenSSH
      tags: firewall

    - name: Allow HTTP and HTTPS through firewall
      ufw:
        rule: allow
        port: "{{ item }}"
        proto: tcp
      loop:
        - 80
        - 443
      tags: firewall

    - name: Enable UFW
      ufw:
        state: enabled
      tags: firewall

    # Fail2ban Configuration
    - name: Configure fail2ban for SSH
      copy:
        dest: /etc/fail2ban/jail.local
        content: |
          [DEFAULT]
          bantime = 3600
          findtime = 600
          maxretry = 3
          
          [sshd]
          enabled = true
          port = ssh
          filter = sshd
          logpath = /var/log/auth.log
          maxretry = 3
          bantime = 3600
        backup: true
      notify: restart fail2ban
      tags: security

    # System Optimization
    - name: Configure swappiness
      sysctl:
        name: vm.swappiness
        value: '10'
        state: present
      tags: performance

    - name: Configure filesystem parameters
      sysctl:
        name: "{{ item.name }}"
        value: "{{ item.value }}"
        state: present
      loop:
        - { name: 'fs.file-max', value: '2097152' }
        - { name: 'net.core.somaxconn', value: '65535' }
        - { name: 'net.ipv4.tcp_max_syn_backlog', value: '65535' }
      tags: performance

    # Time Synchronization
    - name: Install and configure NTP
      apt:
        name: ntp
        state: present
      tags: system

    - name: Ensure NTP is running and enabled
      systemd:
        name: ntp
        state: started
        enabled: true
      tags: system

    # Directory Structure
    - name: Create application directories
      file:
        path: "{{ item }}"
        state: directory
        owner: "{{ deploy_user }}"
        group: "{{ deploy_user }}"
        mode: '0755'
      loop:
        - /var/www
        - /var/www/html
        - /var/www/backups
        - /var/www/logs
        - /var/log/custom-php-framework
      tags: directories

    # Log Rotation
    - name: Configure log rotation for application
      copy:
        dest: /etc/logrotate.d/custom-php-framework
        content: |
          /var/log/custom-php-framework/*.log {
            daily
            missingok
            rotate 30
            compress
            notifempty
            create 644 www-data www-data
            postrotate
              /bin/systemctl reload-or-restart docker || true
            endscript
          }
      tags: logs

  handlers:
    - name: restart sshd
      systemd:
        name: sshd
        state: restarted

    - name: restart fail2ban
      systemd:
        name: fail2ban
        state: restarted

  post_tasks:
    - name: Display setup completion info
      debug:
        msg:
          - "Initial server setup completed successfully!"
          - "Deploy user '{{ deploy_user }}' created with sudo privileges"
          - "SSH key authentication configured"
          - "Firewall enabled (SSH, HTTP, HTTPS allowed)"
          - "Fail2ban configured for SSH protection"
          - "Next: Update inventory to use deploy user and run infrastructure setup"
      tags: always