---
# Unifi Migration Playbook
# MongoDB -> databases (.81), Unifi app -> network-services (.121)
#
# Usage:
#   ansible-playbook playbooks/migrate-unifi.yml --tags=setup-nfs
#   ansible-playbook playbooks/migrate-unifi.yml --tags=stop-old
#   ansible-playbook playbooks/migrate-unifi.yml --tags=deploy
#   ansible-playbook playbooks/migrate-unifi.yml  # full migration

- name: Setup NFS mount on network-services
  hosts: network-services
  gather_facts: no
  become: yes
  tags: [setup-nfs, deploy]
  tasks:
    - name: Create mount directory
      file:
        path: /mnt/nas/docker
        state: directory
        mode: '0755'

    - name: Check if NFS already in fstab
      shell: grep -q "192.168.1.251:/volume1/docker" /etc/fstab
      register: fstab_check
      ignore_errors: yes
      changed_when: false

    - name: Add NFS mount to fstab
      lineinfile:
        path: /etc/fstab
        line: "192.168.1.251:/volume1/docker /mnt/nas/docker nfs defaults 0 0"
        state: present
      when: fstab_check.rc != 0

    - name: Mount NFS
      shell: mount -a
      changed_when: false

    - name: Verify mount
      stat:
        path: /mnt/nas/docker/unifi
      register: mount_check

    - name: Fail if mount not working
      fail:
        msg: "NFS mount failed - /mnt/nas/docker/unifi not accessible"
      when: not mount_check.stat.exists

- name: Stop Unifi on docker666
  hosts: docker666
  gather_facts: no
  tags: [stop-old]
  tasks:
    - name: Stop old Unifi stack
      shell: |
        cd /volume1/docker/unifi
        docker compose down
      register: stop_result
      ignore_errors: yes

    - name: Show result
      debug:
        msg: "{{ stop_result.stdout_lines | default(['Stopped']) }}"

- name: Deploy MongoDB on databases
  hosts: databases
  gather_facts: no
  tags: [deploy, deploy-mongo]
  tasks:
    - name: Ensure database network exists
      shell: docker network inspect database >/dev/null 2>&1 || docker network create database
      changed_when: false

    - name: Create compose directory
      file:
        path: /home/docker/appdata/mongodb
        state: directory
        mode: '0755'

    - name: Copy MongoDB compose
      copy:
        src: "../compose-files/databases/mongodb/docker-compose.yml"
        dest: /home/docker/appdata/mongodb/docker-compose.yml
        mode: '0644'

    - name: Deploy MongoDB
      shell: |
        cd /home/docker/appdata/mongodb
        docker compose pull
        docker compose up -d

    - name: Wait for MongoDB
      shell: |
        for i in $(seq 1 30); do
          if docker exec unifi-db mongo --eval "db.adminCommand('ping')" 2>/dev/null | grep -q "ok"; then
            echo "MongoDB ready"
            exit 0
          fi
          sleep 2
        done
        exit 1
      register: mongo_wait
      changed_when: false

- name: Deploy Unifi on network-services
  hosts: network-services
  gather_facts: no
  tags: [deploy, deploy-unifi]
  tasks:
    - name: Ensure proxy network exists
      shell: docker network inspect proxy >/dev/null 2>&1 || docker network create proxy
      changed_when: false

    - name: Create compose directory
      file:
        path: /root/docker/appdata/unifi
        state: directory
        mode: '0755'

    - name: Copy Unifi compose
      copy:
        src: "../compose-files/network-services/unifi/docker-compose.yml"
        dest: /root/docker/appdata/unifi/docker-compose.yml
        mode: '0644'

    - name: Deploy Unifi
      shell: |
        cd /root/docker/appdata/unifi
        docker compose pull
        docker compose up -d

    - name: Wait for Unifi startup
      pause:
        seconds: 60
        prompt: "Waiting for Unifi to initialize..."

    - name: Check Unifi status
      shell: docker ps --filter name=unifi --format "table {{'{{'}}.Names{{'}}'}}\t{{'{{'}}.Status{{'}}'}}"
      register: unifi_status

    - name: Show status
      debug:
        msg: "{{ unifi_status.stdout_lines }}"

- name: Migration summary
  hosts: localhost
  gather_facts: no
  tags: [always]
  tasks:
    - name: Next steps
      debug:
        msg:
          - "============================================"
          - "UNIFI MIGRATION SUMMARY"
          - "============================================"
          - "MongoDB:  192.168.1.81:27017"
          - "Unifi:    https://192.168.1.121:8443"
          - ""
          - "UPDATE YOUR 4 APs:"
          - "  ssh admin@<AP-IP>"
          - "  set-inform http://192.168.1.121:8080/inform"
          - ""
          - "Or from Unifi UI: Settings > System > Advanced"
          - "  Set 'Inform Host' to: 192.168.1.121"
          - ""
          - "CLEANUP (after APs reconnect):"
          - "  ssh docker666 'cd /volume1/docker/unifi && docker compose down'"
          - "============================================"