#!/bin/bash

# Exit immediately on error
set -e

# Display usage if no tag is provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <tag>"
    echo "Available tags: main_backup, wordpress_db, core_files, media_themes, full_backup"
    exit 1
fi

# Assign input argument
TAG=$1
backupPath='/mnt/backups'
password_file="/etc/restic-password" # Use a password file instead of embedding the password

# Validate if the password file exists
if [ ! -f "$password_file" ]; then
    echo "Error: Password file not found at $password_file"
    exit 1
fi

# Set Restic environment variables
export RESTIC_REPOSITORY="$backupPath"
export RESTIC_PASSWORD=$(cat "$password_file")

# Validate the provided tag against known tags
case "$TAG" in
    main_backup|wordpress_db|core_files|media_themes|full_backup)
        # Use the --json flag to output the snapshots in JSON format
        if restic -r "$RESTIC_REPOSITORY" snapshots --tag "$TAG" --json; then
            echo "Snapshots for tag '$TAG' displayed successfully."
        else
            echo "Error: Unable to display snapshots for tag '$TAG'."
            exit 1
        fi
        ;;
    *)
        echo "Error: Unknown tag '$TAG'."
        echo "Available tags: main_backup, wordpress_db, core_files, media_themes, full_backup"
        exit 1
        ;;
esac