---
- name: Backup Postgres
  hosts: postgres
  gather_facts: yes
  become: yes

  vars:
    postgres_container_name: "{{ postgres.dockercompose.services.postgres.container_name }}"
    postgres_user: "{{ postgres.dockercompose.services.postgres.environment.POSTGRES_USER }}"
    backup_dir: "{{ backup_root_dir }}/{{ backup_dirname }}"
    scripts_dir: "/home/pi/arcodange/docker_composes/postgres/scripts"
    keep_days: 3

  tasks:
    - name: S'assurer que le répertoire de backup existe
      file:
        path: "{{ backup_dir }}"
        state: directory
        mode: '0755'
    
    - name: define backup command
      set_fact:
        backup_cmd: "docker exec {{ postgres_container_name }} pg_dumpall -U {{ postgres_user }}"
    
    - name: test backup_cmd
      ansible.builtin.shell: |
        {{ backup_cmd }} > /dev/null
    
    - name: Créer le script de backup
      copy:
        dest: "{{ scripts_dir }}/backup.sh"
        mode: '0755'
        content: |
          #!/bin/bash
          set -e
          mkdir -p {{ backup_dir }}
          {{ backup_cmd }} | gzip > {{ backup_dir }}/backup_$(date +\%Y\%m\%d).sql.gz
          find {{ backup_dir }} -type f -name 'backup_*.sql.gz' -mtime +{{ keep_days }} -delete

    - name: Ajouter une tâche cron pour dump PostgreSQL tous les jours à 4h avec compression
      cron:
        name: "Backup PostgreSQL compressé"
        minute: "0"
        hour: "4"
        user: root
        job: "{{ scripts_dir }}/backup.sh"

    - name: Créer le script de restauration
      copy:
        dest: "{{ scripts_dir }}/restore.sh"
        mode: '0755'
        content: |
          #!/bin/bash
          set -e

          CONTAINER_NAME="{{ postgres_container_name }}"
          POSTGRES_USER="{{ postgres_user }}"
          BACKUP_DIR="{{ backup_dir }}"

          if [ -z "$1" ]; then
            FILE=$(ls -1t "$BACKUP_DIR"/backup_*.sql.gz | head -n 1)
            echo "Aucune date fournie, restauration du dernier dump : $FILE"
          else
            FILE="$BACKUP_DIR/backup_$1.sql.gz"
            if [ ! -f "$FILE" ]; then
              echo "Fichier $FILE introuvable"
              exit 1
            fi
          fi

          echo "Copie du fichier dans le container..."
          docker cp "$FILE" "$CONTAINER_NAME":/tmp/restore.sql.gz

          echo "Décompression dans le container..."
          docker exec "$CONTAINER_NAME" sh -c "gunzip -f /tmp/restore.sql.gz"

          echo "Restauration dans PostgreSQL..."
          docker exec -i "$CONTAINER_NAME" psql -U "$POSTGRES_USER" -f /tmp/restore.sql

          echo "Restauration terminée."
          echo "Si cela ne fonctionne pas, supprimez le contenu du dossier data avant de rejouer le script"

# docker exec -u git gitea
# gitea dump --skip-log --skip-db --type tar.gz -c /data/gitea/conf/app.ini -C /data/gitea/ -f /tmp/backup_20250828.gitea.gz