---
- name: Deploy Application with Auto-Scaling
  hosts: "{{ target_hosts | default('all') }}"
  become: yes
  become_method: sudo
  vars_files:
    - group_vars/default.yml
    - "group_vars/vault/{{ deploy_env }}.yml"

  vars:
    # Deployment configuration
    deploy_strategy: "{{ deploy_strategy | default('docker') }}"
    docker_image_tag: "{{ docker_image_tag | default('latest') }}"

    # Environment detection
    is_production: "{{ deploy_env == 'production' }}"
    is_staging: "{{ deploy_env == 'staging' }}"
    is_development: "{{ deploy_env == 'development' }}"

  pre_tasks:
    - name: Validate required variables
      assert:
        that:
          - app_name is defined and app_name != ""
          - git_repo is defined and git_repo != ""
          - server_user is defined and server_user != ""
          - deploy_env is defined and deploy_env != ""
        fail_msg: "Missing required variables: app_name, git_repo, server_user, and deploy_env must be defined"

    - name: Validate auto-scaling configuration
      assert:
        that:
          - replicas | int >= 1
          - replicas | int <= max_replicas | int
          - deployment_strategy in ['rolling', 'blue-green', 'recreate']
        fail_msg: "Invalid auto-scaling configuration. Replicas must be between 1 and {{ max_replicas }}, and deployment_strategy must be one of: rolling, blue-green, recreate"

    - name: Load project-specific variables
      include_vars: "projects/{{ app_name }}/vars.yml"
      when:
        - lookup('file', 'projects/' + app_name + '/vars.yml', errors='ignore')

    - name: Override deployment strategy from project vars
      set_fact:
        deploy_strategy: "{{ deploy_strategy | default('docker') }}"

    - name: Ensure port registry exists
      file:
        path: "{{ port_registry_file }}"
        state: touch
      delegate_to: localhost
      run_once: true

    - name: Initialize port registry if empty
      copy:
        content: "projects: {}"
        dest: "{{ port_registry_file }}"
        force: no
      delegate_to: localhost
      run_once: true

  tasks:
    # ============================================================================
    # DOCKER DEPLOYMENT WITH AUTO-SCALING
    # ============================================================================
    - name: Include docker role with auto-scaling
      include_role:
        name: docker
      when: deploy_strategy in ['simple-docker', 'docker']

    # ============================================================================
    # POST-DEPLOYMENT VERIFICATION
    # ============================================================================
    - name: Wait for deployment to settle
      pause:
        seconds: 10
      when: deploy_strategy in ['simple-docker', 'docker']

    # ============================================================================
    # CLEANUP AND MAINTENANCE
    # ============================================================================
    - name: Cleanup old Docker images
      shell: |
        sudo /home/{{ server_user }}/scripts/manage-{{ app_name }}-{{ deploy_env }}{{ env_tag | default('') }}.sh clean
      become_user: "{{ server_user }}"
      when:
        - deploy_strategy in ['simple-docker', 'docker']
        - cleanup_old_images | default(true)
      ignore_errors: yes

    # ============================================================================
    # DEPLOYMENT SUMMARY
    # ============================================================================
    - name: Generate deployment summary
      set_fact:
        deployment_summary:
          application: "{{ app_name }}"
          environment: "{{ deploy_env }}{{ env_tag | default('') }}"
          version: "{{ docker_image_tag }}"
          replicas: "{{ replicas }}"
          strategy: "{{ deployment_strategy }}"
          deploy_strategy: "{{ deploy_strategy }}"
          timestamp: "{{ ansible_date_time.iso8601 }}"
          duration: "{{ ansible_play_duration | default('unknown') }}"

    - name: Display deployment summary
      debug:
        msg:
          - "🎉 DEPLOYMENT SUMMARY"
          - "===================="
          - "Application: {{ deployment_summary.application }}"
          - "Environment: {{ deployment_summary.environment }}"
          - "Version: {{ deployment_summary.version }}"
          - "Replicas: {{ deployment_summary.replicas }}"
          - "Strategy: {{ deployment_summary.strategy }}"
          - "Timestamp: {{ deployment_summary.timestamp }}"

    - name: Save deployment record
      copy:
        content: "{{ deployment_summary | to_nice_yaml }}"
        dest: "/home/{{ server_user }}/ci/logs/{{ app_name }}/{{ deploy_env }}/deployment-{{ ansible_date_time.epoch }}.yml"
      when: save_deployment_record | default(true)

  # ============================================================================
  # HANDLERS
  # ============================================================================
  handlers:
    - name: reload nginx
      service:
        name: nginx
        state: reloaded
      when: ansible_service_mgr == "systemd"

  # ============================================================================
  # POST TASKS
  # ============================================================================