#!/bin/bash

# Source the .env file
source <(sed 's/#.*//g' ./.env)

# Set up variables from environment variables
MARIADB_HOST=${MARIADB_HOST:-"localhost"}
MARIADB_USER=${MARIADB_USER:-"root"}
MARIADB_PASSWORD=${MARIADB_PASSWORD:-"passwd"}
MARIADB_DATABASE=${MARIADB_DATABASE:-"DBName"}
SQLITE_DATABASE=${SQLITE_DATABASE:-"/Path/to/database"}
SFTP_HOST=${SFTP_HOST:-"localhost"}
SFTP_PATH=${SFTP_PATH:-"/Paht/to/sftp"}
TELEGRAM_BOT_TOKEN=${TELEGRAM_BOT_TOKEN:-"TOKEN"}
TELEGRAM_CHAT_ID=${TELEGRAM_CHAT_ID:-"ID_CHAT"}

# Generate backups
start_time=$(date +%s)
mariadb_backup_filename="globalists_mariadb_backup_$(date +%Y%m%d).sql.gz"
mariadb-dump -h "$MARIADB_HOST" -u "$MARIADB_USER" -p"$MARIADB_PASSWORD" "$MARIADB_DATABASE" | gzip > "$mariadb_backup_filename"
sqlite_backup_filename="globalists_sqlite_backup_$(date +%Y%m%d).sql.gz"
sqlite3 "$SQLITE_DATABASE" .dump | gzip > "$sqlite_backup_filename"

# Calculate SHA512 hash of backups
mariadb_hash=$(sha512sum "$mariadb_backup_filename" | awk '{ print $1 }')
sqlite_hash=$(sha512sum "$sqlite_backup_filename" | awk '{ print $1 }')

# Transfer backups to SFTP server
sftp "$SFTP_HOST"<< EOF > /dev/null
cd "$SFTP_PATH"
put "$mariadb_backup_filename"
put "$sqlite_backup_filename"
quit
EOF

# Delete local backup files
rm "$mariadb_backup_filename"
rm "$sqlite_backup_filename"

# Send message via Telegram
message="
** Respaldo completado! **

** Base de datos:**

*  MariaDB: **$(echo $mariadb_backup_filename hash: $mariadb_hash)**

*  SQLite: **$(echo $sqlite_backup_filename hash: $sqlite_hash)**

**⏱️ Tiempo de transferencia:** $(date -u -d "@$(( $(date +%s) - start_time ))" +'%T')

** Disponible en SFTP:** ($SFTP_PATH)
"


curl -s -X POST "https://api.telegram.org/bot$TELEGRAM_BOT_TOKEN/sendMessage" -d chat_id="$TELEGRAM_CHAT_ID" -d text="$message" > /dev/null