#!/usr/bin/env bash

#
# Run the WCX update at most once every 48 hours.
#
# The systemd timer invokes this script every night. The timestamp file is
# updated only after a successful WCX update.
#

set -Eeuo pipefail

ROOT_DIR="/storage/disk1/WCX"

UPDATE_SCRIPT="${ROOT_DIR}/scripts/update_wcx.sh"
STAMP_FILE="${ROOT_DIR}/database/last_scheduled_update"

MINIMUM_INTERVAL_SECONDS=$((47 * 60 * 60))


log() {
    printf '[%s] %s\n' \
        "$(date '+%Y-%m-%d %H:%M:%S')" \
        "$*"
}


if [[ ! -x "${UPDATE_SCRIPT}" ]]; then
    log "ERROR: Update script is missing or not executable: ${UPDATE_SCRIPT}" >&2
    exit 1
fi


if [[ -f "${STAMP_FILE}" ]]; then
    current_time=$(date +%s)
    previous_time=$(stat -c %Y "${STAMP_FILE}")
    elapsed_seconds=$((current_time - previous_time))

    if (( elapsed_seconds < MINIMUM_INTERVAL_SECONDS )); then
        elapsed_hours=$((elapsed_seconds / 3600))

        log "Skipping update; previous successful scheduled run was ${elapsed_hours} hours ago."
        exit 0
    fi
fi


log "Starting scheduled WCX update."

"${UPDATE_SCRIPT}"

touch "${STAMP_FILE}"

log "Scheduled WCX update completed successfully."