---
# Ubuntu/Debian LEMP WordPress installation
- name: Install LEMP stack with WordPress (Ubuntu/Debian)
  hosts: all
  become: yes

  pre_tasks:
    - name: Gather OS facts
      setup:
        gather_subset:
          - '!all'
          - '!min'
          - 'distribution'
          - 'distribution_version'
          - 'os_family'

    - name: Load Debian family variables
      include_vars: "../vars/debian-family.yml"

    - name: Debug OS information
      debug:
        msg: |
          OS Family: {{ ansible_os_family }}
          Distribution: {{ ansible_distribution }}
          Version: {{ ansible_distribution_version }}
          Supported: Ubuntu/Debian family systems

    - name: Verify supported OS
      fail:
        msg: "This playbook only supports Ubuntu/Debian systems. Detected: {{ ansible_os_family }}"
      when: ansible_os_family != "Debian"

    # Environment Detection and Configuration
    - name: Detect if running in Docker
      stat:
        path: /.dockerenv
      register: docker_env
      tags: always

    - name: Check for deployment_environment override
      set_fact:
        environment_override: "{{ deployment_environment is defined }}"
      tags: always

    - name: Set deployment environment (auto-detect or override)
      set_fact:
        deployment_environment: >-
          {{ deployment_environment | default('docker' if docker_env.stat.exists else 'bare_metal') }}
      tags: always

    - name: Set WordPress site URL with smart defaults
      set_fact:
        wp_site_url: "{{ wp_site_url | default(_auto_wp_url) }}"
      vars:
        _auto_wp_url: >-
          {{ 'http://localhost:8080' if (deployment_environment == 'docker')
             else 'http://' + (ansible_default_ipv4.address | default('localhost')) }}
      tags: always

    - name: Debug deployment configuration
      debug:
        msg: |
          Environment: {{ deployment_environment }} ({{ 'overridden' if environment_override else 'auto-detected' }})
          WordPress URL: {{ wp_site_url }}
          Docker detected: {{ docker_env.stat.exists }}
      tags: always

  vars:
    # WordPress Configuration
    wordpress_path: "{{ web_root }}"
    wordpress_url: "http://{{ ansible_default_ipv4.address | default('localhost') }}"

    # Database Configuration (use inventory variables or these defaults)
    default_mysql_root_password: "{{ mysql_root_password | default('secure_root_password_123') }}"
    default_wordpress_db_name: "{{ wordpress_db_name | default('wordpress_db') }}"
    default_wordpress_db_user: "{{ wordpress_db_user | default('wordpress_user') }}"
    default_wordpress_db_password: "{{ wordpress_db_password | default('secure_wp_password_123') }}"

    # WordPress Admin (use inventory variables directly)
    # These variables come from inventory/production.yml
    # wp_admin_user, wp_admin_password, wp_admin_email, wp_site_title

    # Auto-Update Configuration
    update_cron_enabled: true

tasks:
    # IMPORTANT: Pre-flight checks - create basic directory structure FIRST
    - name: Ensure /var/www exists
      file:
        path: /var/www
        state: directory
        mode: '0755'
      tags: [preflight]

    - name: Create web root directory
      file:
        path: /var/www/html
        state: directory
        owner: www-data
        group: www-data
        mode: '0755'
      tags: [preflight]

    # Package Installation
    - name: Update package cache
      apt:
        update_cache: yes
        cache_valid_time: 3600
      tags: packages

    - name: Install gnupg for PPA (required for apt-add-repository)
      package:
        name: gnupg
        state: present
      tags: packages

    - name: Install nginx first (required for web root)
      apt:
        name: nginx
        state: present
      tags: [packages, nginx]

    - name: Install all required packages
      package:
        name: "{{ packages }}"
        state: present
      tags: [packages, nginx]

    - name: Install gnupg for PPA (required for apt-add-repository)
      package:
        name: gnupg
        state: present
      tags: packages

    - name: Add PHP PPA for Ubuntu (needed for PHP 8.4)
      apt_repository:
        repo: ppa:ondrej/php
      when: ansible_distribution == "Ubuntu"
      tags: packages

    - name: Install all required packages
      package:
        name: "{{ packages }}"
        state: present
      tags: packages

    # Service Management
    - name: Start and enable Nginx
      service:
        name: "{{ nginx_service }}"
        state: started
        enabled: yes
      tags: nginx

    - name: Start and enable MySQL/MariaDB
      service:
        name: "{{ mysql_service }}"
        state: started
        enabled: yes
      tags: mysql

    - name: Start and enable PHP-FPM
      service:
        name: "{{ php_fpm_service }}"
        state: started
        enabled: yes
      tags: php

    # Firewall Configuration
    - name: Configure firewall (UFW)
      ufw:
        rule: allow
        port: "{{ item }}"
        proto: tcp
      loop:
        - "22"
        - "80"
        - "443"
      tags: firewall

    # MySQL Security (Ubuntu 24.04 fix for auth_socket)
    - name: Set MySQL root password (using auth_socket first)
      mysql_user:
        name: root
        password: "{{ mysql_root_password }}"
        plugin: mysql_native_password
        login_unix_socket: /var/run/mysqld/mysqld.sock
        state: present
      become: true
      tags: mysql

    - name: Create MySQL configuration for root
      template:
        src: ../templates/my.cnf.j2
        dest: /root/.my.cnf
        mode: '0600'
      tags: mysql

    - name: Remove anonymous MySQL users
      mysql_user:
        name: ""
        host_all: yes
        state: absent
      tags: mysql

    - name: Remove MySQL test database
      mysql_db:
        name: test
        state: absent
      tags: mysql

    # WordPress Database Setup
    - name: Create WordPress database
      mysql_db:
        name: "{{ wordpress_db_name }}"
        state: present
      tags: mysql

    - name: Create WordPress database user
      mysql_user:
        name: "{{ wordpress_db_user }}"
        password: "{{ wordpress_db_password }}"
        priv: "{{ wordpress_db_name }}.*:ALL"
        host: localhost
        state: present
      tags: mysql

    # WordPress Installation
    - name: Create web root directory
      file:
        path: "{{ wordpress_path }}"
        state: directory
        owner: www-data
        group: www-data
        mode: '0755'
      tags: wordpress

    - name: Remove default nginx index file
      file:
        path: "{{ wordpress_path }}/index.nginx-debian.html"
        state: absent
      tags: wordpress

    - name: Download WordPress
      get_url:
        url: https://wordpress.org/latest.tar.gz
        dest: /tmp/wordpress.tar.gz
        mode: '0644'
      tags: wordpress

    - name: Extract WordPress
      unarchive:
        src: /tmp/wordpress.tar.gz
        dest: /tmp/
        remote_src: yes
      tags: wordpress

    - name: Copy WordPress files
      command: "cp -r /tmp/wordpress/. {{ wordpress_path }}/"
      args:
        creates: "{{ wordpress_path }}/wp-config-sample.php"
      tags: wordpress

    - name: Set WordPress file permissions
      file:
        path: "{{ wordpress_path }}"
        owner: "{{ nginx_user }}"
        group: "{{ nginx_user }}"
        recurse: yes
      tags: wordpress

    # SSL Configuration (optional)
    - name: Generate self-signed SSL certificate (if SSL enabled but no cert provided)
      command: >
        openssl req -x509 -nodes -days 365 -newkey rsa:2048
        -keyout {{ ssl_cert_key_path | default('/etc/ssl/private/nginx-selfsigned.key') }}
        -out {{ ssl_cert_path | default('/etc/ssl/certs/nginx-selfsigned.crt') }}
        -subj "/C=DE/ST=State/L=City/O=Organization/OU=OrgUnit/CN={{ domain_name }}"
      when:
        - ssl_enabled | default(false)
        - not (ssl_cert_path is defined and ssl_cert_key_path is defined)
      tags: ssl

    # Nginx Configuration
    - name: Configure Nginx for WordPress
      template:
        src: >-
          ../templates/{% if ssl_enabled | default(false) %}wordpress-ssl.nginx.j2{%
          else %}wordpress.nginx.j2{% endif %}
        dest: "{{ nginx_sites_available }}/wordpress"
      notify: restart nginx
      tags: nginx

    - name: Enable WordPress site
      file:
        src: "{{ nginx_sites_available }}/wordpress"
        dest: "{{ nginx_sites_enabled }}/wordpress"
        state: link
      notify: restart nginx
      tags: nginx

    - name: Remove default Nginx site
      file:
        path: "{{ nginx_sites_enabled }}/default"
        state: absent
      notify: restart nginx
      tags: nginx

    # PHP Configuration
    - name: Configure PHP-FPM pool
      template:
        src: ../templates/www.conf.j2
        dest: "{{ php_fpm_pool_path }}/www.conf"
        backup: yes
      notify: restart php-fpm
      tags: php

    - name: Configure PHP settings
      lineinfile:
        path: "{{ php_cli_config_path }}/php.ini"
        regexp: "{{ item.regexp }}"
        line: "{{ item.line }}"
        backup: yes
      loop:
        - { regexp: '^upload_max_filesize', line: 'upload_max_filesize = 64M' }
        - { regexp: '^post_max_size', line: 'post_max_size = 64M' }
        - { regexp: '^memory_limit', line: 'memory_limit = 256M' }
        - { regexp: '^max_execution_time', line: 'max_execution_time = 300' }
      notify: restart php-fpm
      tags: php

    # WordPress Configuration
    - name: Configure WordPress
      template:
        src: ../templates/wp-config.php.j2
        dest: "{{ wordpress_path }}/wp-config.php"
        owner: www-data
        group: www-data
        mode: '0600'
      tags: wordpress

    # WP-CLI Installation
    - name: Download WP-CLI
      get_url:
        url: https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
        dest: /usr/local/bin/wp
        mode: '0755'
      tags: wp-cli

    - name: Verify WP-CLI installation
      command: wp --info
      environment:
        HOME: "{{ wordpress_path }}"
      register: wp_cli_info
      tags: wp-cli

    - name: Display WP-CLI info
      debug:
        var: wp_cli_info.stdout_lines
      tags: wp-cli

    # WordPress Core Installation
    - name: Install WordPress Core
      command: >
        wp core install
        --url="{{ wp_site_url }}"
        --title="{{ wp_site_title }}"
        --admin_user="{{ wp_admin_user }}"
        --admin_password="{{ wp_admin_password }}"
        --admin_email="{{ wp_admin_email }}"
        --path="{{ wordpress_path }}"
        --allow-root
      environment:
        HOME: "{{ wordpress_path }}"
      tags: wp-install

    - name: Set WordPress file ownership after installation
      file:
        path: "{{ wordpress_path }}"
        owner: "{{ nginx_user }}"
        group: "{{ nginx_user }}"
        recurse: yes
      tags: wp-install

    - name: Display WordPress installation success
      debug:
        msg: |
          WordPress installation completed!
          URL: {{ wp_site_url }}
          Admin User: {{ wp_admin_user }}
          Admin Password: {{ wp_admin_password }}
          Admin Email: {{ wp_admin_email }}
      tags: wp-install

    # WordPress Auto-Update Setup
    - name: Create update script directory
      file:
        path: /var/backups/wordpress
        state: directory
        mode: '0755'
      tags: update

    - name: Deploy WordPress update script
      copy:
        src: ../scripts/wp-update.sh
        dest: /usr/local/bin/wp-update.sh
        mode: '0755'
      tags: update

    - name: Configure WordPress auto-update settings
      command: >
        wp option update auto_update_core_minor enabled
        --allow-root
      environment:
        HOME: "{{ wordpress_path }}"
      ignore_errors: yes
      tags: update

    - name: Set up cron job for WordPress updates
      cron:
        name: wordpress-weekly-update
        job: "/usr/local/bin/wp-update.sh --minor --no-backup >> /var/log/wp-update.log 2>&1"
        minute: "0"
        hour: "4"
        weekday: "0"
        user: "root"
      when: update_cron_enabled | default(true) | bool
      tags: update

    # Fail2Ban Security
    - name: Deploy Fail2Ban configuration
      template:
        src: ../templates/fail2ban.j2
        dest: /etc/fail2ban/jail.local
        mode: '0644'
      notify: restart fail2ban
      tags: fail2ban

    - name: Deploy WordPress Fail2Ban filter
      copy:
        src: ../templates/fail2ban-wordpress-filter.conf
        dest: /etc/fail2ban/filter.d/wordpress-login.conf
        mode: '0644'
      notify: restart fail2ban
      tags: fail2ban

    - name: Ensure Fail2Ban service is running
      service:
        name: fail2ban
        state: started
        enabled: yes
      tags: fail2ban

    - name: Display Fail2Ban status info
      debug:
        msg: |
          Fail2Ban security enabled!
          Jails: sshd, nginx-http-auth, nginx-botsearch, wordpress-login, recidive
          Use: fail2ban-client status to see banned IPs
      tags: fail2ban

  handlers:
    - name: restart nginx
      service:
        name: "{{ nginx_service }}"
        state: restarted

    - name: restart php-fpm
      service:
        name: "{{ php_fpm_service }}"
        state: restarted

    - name: restart fail2ban
      service:
        name: fail2ban
        state: restarted

    - name: restart mysql
      service:
        name: "{{ mysql_service }}"
        state: restarted