---
# Monitor Workflow Performance
# Collects comprehensive metrics about workflow execution, Gitea load, and system resources
- name: Monitor Workflow Performance
  hosts: production
  gather_facts: yes
  become: no
  vars:
    monitoring_output_dir: "/home/deploy/monitoring/workflow-metrics"
    monitoring_lookback_hours: 24
    gitea_stack_path: "{{ stacks_base_path }}/gitea"
    traefik_stack_path: "{{ stacks_base_path }}/traefik"

  tasks:
    - name: Create monitoring output directory
      ansible.builtin.file:
        path: "{{ monitoring_output_dir }}"
        state: directory
        mode: '0755'

    - name: Get system load average
      ansible.builtin.shell: |
        uptime | awk -F'load average:' '{print $2}' | awk '{print $1}' | tr -d ' '
      register: system_load
      changed_when: false

    - name: Get Docker container count
      ansible.builtin.shell: |
        docker ps --format '{{ '{{' }}.Names{{ '}}' }}' | wc -l
      register: docker_container_count
      changed_when: false

    - name: Get Gitea Runner status
      ansible.builtin.shell: |
        if docker ps --format '{{ '{{' }}.Names{{ '}}' }}' | grep -q "gitea-runner"; then
          echo "running"
        else
          echo "stopped"
        fi
      register: gitea_runner_status
      changed_when: false

    - name: Get Gitea container resource usage
      ansible.builtin.shell: |
        docker stats gitea --no-stream --format "{{ '{{' }}.CPUPerc{{ '}}' }},{{ '{{' }}.MemUsage{{ '}}' }},{{ '{{' }}.MemPerc{{ '}}' }}" 2>/dev/null || echo "N/A,N/A,N/A"
      register: gitea_stats
      changed_when: false
      failed_when: false

    - name: Get Traefik container resource usage
      ansible.builtin.shell: |
        docker stats traefik --no-stream --format "{{ '{{' }}.CPUPerc{{ '}}' }},{{ '{{' }}.MemUsage{{ '}}' }},{{ '{{' }}.MemPerc{{ '}}' }}" 2>/dev/null || echo "N/A,N/A,N/A"
      register: traefik_stats
      changed_when: false
      failed_when: false

    - name: Check Gitea API response time
      ansible.builtin.uri:
        url: "https://{{ gitea_domain }}/api/healthz"
        method: GET
        status_code: [200]
        validate_certs: false
        timeout: 10
      register: gitea_api_test
      changed_when: false
      failed_when: false

    - name: Get Gitea logs for workflow activity (last {{ monitoring_lookback_hours }} hours)
      ansible.builtin.shell: |
        cd {{ gitea_stack_path }}
        docker compose logs gitea --since "{{ monitoring_lookback_hours }}h" 2>&1 | \
          grep -iE "workflow|action|runner" | \
          tail -50 || echo "No workflow activity found"
      register: gitea_workflow_logs
      changed_when: false
      failed_when: false

    - name: Count workflow-related log entries
      ansible.builtin.shell: |
        cd {{ gitea_stack_path }}
        docker compose logs gitea --since "{{ monitoring_lookback_hours }}h" 2>&1 | \
          grep -iE "workflow|action|runner" | \
          wc -l
      register: workflow_log_count
      changed_when: false
      failed_when: false

    - name: Get disk usage for Gitea data
      ansible.builtin.shell: |
        du -sh {{ gitea_stack_path }}/data 2>/dev/null | awk '{print $1}' || echo "N/A"
      register: gitea_data_size
      changed_when: false
      failed_when: false

    - name: Get Docker system disk usage
      ansible.builtin.shell: |
        docker system df --format "{{ '{{' }}.Size{{ '}}' }}" 2>/dev/null | head -1 || echo "N/A"
      register: docker_disk_usage
      changed_when: false
      failed_when: false

    - name: Get memory usage
      ansible.builtin.shell: |
        free -h | grep Mem | awk '{print $3 "/" $2}'
      register: memory_usage
      changed_when: false

    - name: Get CPU usage (1 minute average)
      ansible.builtin.shell: |
        top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}'
      register: cpu_usage
      changed_when: false
      failed_when: false

    - name: Generate metrics JSON
      ansible.builtin.copy:
        dest: "{{ monitoring_output_dir }}/workflow_metrics_{{ ansible_date_time.epoch }}.json"
        content: |
          {
            "timestamp": "{{ ansible_date_time.iso8601 }}",
            "system_metrics": {
              "load_average": "{{ system_load.stdout }}",
              "cpu_usage_percent": "{{ cpu_usage.stdout | default('N/A') }}",
              "memory_usage": "{{ memory_usage.stdout }}",
              "docker_containers": "{{ docker_container_count.stdout }}",
              "docker_disk_usage": "{{ docker_disk_usage.stdout }}",
              "gitea_data_size": "{{ gitea_data_size.stdout }}"
            },
            "gitea_metrics": {
              "runner_status": "{{ gitea_runner_status.stdout }}",
              "api_response_time_ms": "{{ (gitea_api_test.elapsed * 1000) | default('N/A') | int }}",
              "workflow_log_entries_last_{{ monitoring_lookback_hours }}h": {{ workflow_log_count.stdout | int }},
              "container_stats": {
                "cpu_percent": "{{ gitea_stats.stdout.split(',')[0] if gitea_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}",
                "memory_usage": "{{ gitea_stats.stdout.split(',')[1] if gitea_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}",
                "memory_percent": "{{ gitea_stats.stdout.split(',')[2] if gitea_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}"
              }
            },
            "traefik_metrics": {
              "container_stats": {
                "cpu_percent": "{{ traefik_stats.stdout.split(',')[0] if traefik_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}",
                "memory_usage": "{{ traefik_stats.stdout.split(',')[1] if traefik_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}",
                "memory_percent": "{{ traefik_stats.stdout.split(',')[2] if traefik_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}"
              }
            },
            "optimizations": {
              "repository_artifact_enabled": true,
              "helper_script_caching_enabled": true,
              "combined_deployment_playbook": true,
              "exponential_backoff_health_checks": true,
              "concurrency_groups": true
            }
          }
        mode: '0644'

    - name: Display monitoring summary
      ansible.builtin.debug:
        msg: |
          ================================================================================
          WORKFLOW PERFORMANCE MONITORING - SUMMARY
          ================================================================================
          
          System Metrics:
          - Load Average: {{ system_load.stdout }}
          - CPU Usage: {{ cpu_usage.stdout | default('N/A') }}%
          - Memory Usage: {{ memory_usage.stdout }}
          - Docker Containers: {{ docker_container_count.stdout }}
          - Docker Disk Usage: {{ docker_disk_usage.stdout }}
          - Gitea Data Size: {{ gitea_data_size.stdout }}
          
          Gitea Metrics:
          - Runner Status: {{ gitea_runner_status.stdout }}
          - API Response Time: {{ (gitea_api_test.elapsed * 1000) | default('N/A') | int }}ms
          - Workflow Log Entries (last {{ monitoring_lookback_hours }}h): {{ workflow_log_count.stdout }}
          - Container CPU: {{ gitea_stats.stdout.split(',')[0] if gitea_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}
          - Container Memory: {{ gitea_stats.stdout.split(',')[1] if gitea_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}
          
          Traefik Metrics:
          - Container CPU: {{ traefik_stats.stdout.split(',')[0] if traefik_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}
          - Container Memory: {{ traefik_stats.stdout.split(',')[1] if traefik_stats.stdout != 'N/A,N/A,N/A' else 'N/A' }}
          
          Optimizations Enabled:
          ✅ Repository Artifact Caching
          ✅ Helper Script Caching
          ✅ Combined Deployment Playbook
          ✅ Exponential Backoff Health Checks
          ✅ Concurrency Groups
          
          Metrics saved to: {{ monitoring_output_dir }}/workflow_metrics_{{ ansible_date_time.epoch }}.json
          
          ================================================================================