---
- name: Configure Nginx monitoring in Prometheus
  hosts: 192.168.0.105
  become: yes
  
  tasks:
    - name: Check if nginx config already exists
      stat:
        path: /etc/prometheus/nginx-app1.yml
      register: nginx_config
    
    - name: Create Nginx scrape config
      copy:
        content: |
          # Nginx stub_status metrics
          - job_name: 'nginx-app1'
            scrape_interval: 15s
            scrape_timeout: 10s
            metrics_path: /status
            static_configs:
              - targets: ['192.168.0.110:80']
                labels:
                  instance: 'app1'
                  service: 'nginx'
                  job: 'nginx'
            metric_relabel_configs:
              - source_labels: [__address__]
                target_label: instance
              - source_labels: [__address__]
                regex: '([^:]+):\d+'
                replacement: '${1}'
                target_label: host
        dest: /etc/prometheus/nginx-app1.yml
        owner: root
        group: root
        mode: '0644'
      when: not nginx_config.stat.exists
      register: config_created
    
    - name: Include nginx config in prometheus.yml
      lineinfile:
        path: /etc/prometheus/prometheus.yml
        line: '  - "nginx-app1.yml"'
        insertafter: '^rule_files:'
        state: present
      register: config_modified
    
    - name: Test Prometheus configuration
      command: promtool check config /etc/prometheus/prometheus.yml
      register: prometheus_test
      changed_when: false
    
    - name: Show test result
      debug:
        msg: "{{ prometheus_test.stdout_lines }}"
    
    - name: Reload Prometheus if config changed
      systemd:
        name: prometheus
        state: reloaded
      when: (config_created.changed or config_modified.changed) and prometheus_test.rc == 0
    
    - name: Wait for Prometheus to reload
      pause:
        seconds: 3
    
    - name: Verify Nginx target in Prometheus
      shell: |
        curl -s "http://localhost:9090/api/v1/targets" | python3 -c "
import json, sys
data = json.load(sys.stdin)
for target in data['data']['activeTargets']:
    if 'nginx' in target['labels'].get('job', ''):
        print(f\"Found nginx target: {target['labels']} - Health: {target['health']}\")
"
      register: target_check
      changed_when: false
      ignore_errors: yes
    
    - name: Show target check result
      debug:
        msg: "{{ target_check.stdout_lines if target_check.stdout_lines else 'Nginx target not found' }}"
    
    - name: Check if nginx metrics are available
      shell: |
        # Wait a bit for metrics to appear
        sleep 2
        curl -s "http://localhost:9090/api/v1/query?query=up{job='nginx-app1'}" | python3 -c "
import json, sys
data = json.load(sys.stdin)
if data['status'] == 'success' and data['data']['result']:
    for result in data['data']['result']:
        print(f\"Nginx metrics UP: {result['metric']}\")
else:
    print(\"Nginx metrics not available yet\")
"
      register: metrics_check
      changed_when: false
    
    - name: Show metrics check result
      debug:
        msg: "{{ metrics_check.stdout_lines }}"