---
- name: Dokku migration playbook
  hosts: localhost
  gather_facts: no
  vars_files:
    - config.yml

  tasks:
    - name: Create temporary directory for SSH keypair
      tempfile:
        state: directory
        suffix: dokku_sync
      register: temp_dir

    - name: Generate SSH keypair
      community.crypto.openssh_keypair:
        path: "{{ temp_dir.path }}/dokku_sync_migration"
        type: ed25519
        owner: "{{ lookup('env', 'USER') }}"
        group: "{{ lookup('env', 'USER') }}"
        mode: '0600'

- name: Handle Source Server
  hosts: source
  gather_facts: yes
  vars_files:
    - config.yml
  tasks:
    - name: Get list of Dokku MariaDB services
      shell: dokku mariadb:list | tail -n+2
      register: mariadb_services

    - name: Get list of Dokku PostgreSQL services
      shell: dokku postgres:list | tail -n+2
      register: postgres_services

    - name: Get list of Dokku Redis services
      shell: dokku redis:list | tail -n+2
      register: redis_services

    - name: Get list of Dokku MongoDB services
      shell: dokku mongo:list | tail -n+2
      register: mongo_services

    - name: Save Dokku service lists to disk
      copy:
        content: |
          mariadb_services: {{ mariadb_services.stdout_lines }}
          postgres_services: {{ postgres_services.stdout_lines }}
          redis_services: {{ redis_services.stdout_lines }}
          mongo_services: {{ mongo_services.stdout_lines }}
        dest: /tmp/dokku_services.yml

    - name: Stop all Dokku apps
      command: dokku ps:stop --all

    - name: Stop all MariaDB services
      command: dokku mariadb:stop {{ item }}
      loop: "{{ mariadb_services.stdout_lines }}"

    - name: Stop all PostgreSQL services
      command: dokku postgres:stop {{ item }}
      loop: "{{ postgres_services.stdout_lines }}"

    - name: Stop all Redis services
      command: dokku redis:stop {{ item }}
      loop: "{{ redis_services.stdout_lines }}"

    - name: Stop all MongoDB services
      command: dokku mongo:stop {{ item }}
      loop: "{{ mongo_services.stdout_lines }}"

    - name: Stop Docker service
      service:
        name: docker
        state: stopped

    - name: Stop Docker socket service
      service:
        name: docker.socket
        state: stopped

    - name: Fetch Dokku service lists to local
      fetch:
        src: /tmp/dokku_services.yml
        dest: /tmp/dokku_services.yml
        flat: yes

- name: Handle Destination Server
  hosts: destination
  gather_facts: yes
  vars_files:
    - config.yml
  tasks:
    - name: Copy Dokku service lists to destination
      copy:
        src: /tmp/dokku_services.yml
        dest: /tmp/dokku_services.yml

    - name: Load Dokku service lists
      include_vars:
        file: /tmp/dokku_services.yml

    - name: Stop all Dokku apps
      command: dokku ps:stop --all

    - name: Stop Docker service
      service:
        name: docker
        state: stopped

    - name: Stop Docker socket service
      service:
        name: docker.socket
        state: stopped

    - name: Create necessary directories
      file:
        path: "{{ item }}"
        state: directory
        owner: dokku
        group: dokku
        mode: '0755'
      loop:
        - /home/dokku/
        - /home/data/
        - /var/lib/dokku/

    - name: Synchronize /home/dokku
      synchronize:
        src: "{{ source_host }}:/home/dokku/"
        dest: /home/dokku/
        archive: yes
        delete: yes

    - name: Synchronize /var/lib/dokku
      synchronize:
        src: "{{ source_host }}:/var/lib/dokku/"
        dest: /var/lib/dokku/
        archive: yes
        delete: yes

    - name: Synchronize /home/data
      synchronize:
        src: "{{ source_host }}:/home/data/"
        dest: /home/data/
        archive: yes
        delete: yes

    - name: Synchronize /home/git
      synchronize:
        src: "{{ source_host }}:/home/git/"
        dest: /home/git/
        archive: yes
        delete: yes

    - name: Start all MariaDB services
      command: dokku mariadb:start {{ item }}
      loop: "{{ mariadb_services }}"

    - name: Start all PostgreSQL services
      command: dokku postgres:start {{ item }}
      loop: "{{ postgres_services }}"

    - name: Start all Redis services
      command: dokku redis:start {{ item }}
      loop: "{{ redis_services }}"

    - name: Start all MongoDB services
      command: dokku mongo:start {{ item }}
      loop: "{{ mongo_services }}"

    - name: List Dokku apps
      command: dokku apps:list

    - name: Patch URLs in Dokku configuration files
      find:
        paths:
          - /home/dokku/
        patterns: ['VHOST', 'URLS']
        recurse: yes
      register: dokku_config_files

    - name: Replace source host with destination host in configuration files
      lineinfile:
        path: "{{ item.path }}"
        regexp: "{{ source_host }}"
        line: "{{ destination_host }}"
      loop: "{{ dokku_config_files.files }}"

    - name: Display success message
      debug:
        msg: "SUCCESS"