#!/bin/bash

# shellcheck source=/dev/null
. /app/includes.sh

function clear_dir() {
    rm -rf "${BACKUP_DIR}"
}

function backup_init() {
  NOW="$(date +"${BACKUP_FILE_DATE_FORMAT}")"
  # backup postgresql database file
  BACKUP_FILE_DB_POSTGRESQL="${BACKUP_DIR}/db.${NOW}.dump"
  # backup zip file
  BACKUP_FILE_ZIP="${BACKUP_DIR}/../backup.${NOW}.7z"

  mkdir -p "${BACKUP_DIR}"
}

function backup_db_postgresql() {
  echo "backup postgresql database"

  if ! pg_dump -Fc -h "${POSTGRES_HOST}" -p "${POSTGRES_PORT}" -d "${POSTGRES_DB}" -U "${POSTGRES_USER}" -f "${BACKUP_FILE_DB_POSTGRESQL}"; then
    echo "backup postgresql database failed"

    exit 1
  fi
}

function backup_package() {
  echo "package backup file"

  7z a -t7z -m0=lzma2 -mx=9 -mfb=64 -md=32m -ms=on -mhe=on "${BACKUP_FILE_ZIP}" "${BACKUP_DIR}"/*

  ls -lah "${BACKUP_DIR}"

  echo "display backup ${ZIP_TYPE} file list"

  7z l "${BACKUP_FILE_ZIP}"

  chown 1000:100 "${BACKUP_FILE_ZIP}"
}

function clear_history() {
  if [[ "${BACKUP_KEEP_DAYS}" -gt 0 ]]; then
    echo find "${BACKUP_DIR}" -mtime +"${BACKUP_KEEP_DAYS}" -exec rm -rf {} \;
  fi
}

echo "running the backup program at $(date +"%Y-%m-%d %H:%M:%S %Z")"

init_env

clear_dir
backup_init
backup_db_postgresql
backup_package
clear_dir
clear_history