#!/usr/bin/env bash
# Генерирует sac-daily-report.timer из SAC_DAILY_REPORT_HOUR и SAC_DAILY_REPORT_TIMEZONE.
# Usage: sudo deploy/systemd/render-sac-daily-report-timer.sh [config.env] [output.timer]

set -euo pipefail

CONFIG_FILE="${1:-/opt/security-alert-center/config/sac-api.env}"
OUTPUT="${2:-/etc/systemd/system/sac-daily-report.timer}"

HOUR=9
TZ_NAME="Europe/Moscow"

if [ -f "${CONFIG_FILE}" ]; then
 set -a
 # shellcheck source=/dev/null
 source "${CONFIG_FILE}"
 set +a
fi

HOUR="${SAC_DAILY_REPORT_HOUR:-9}"
TZ_NAME="${SAC_DAILY_REPORT_TIMEZONE:-Europe/Moscow}"

if ! [[ "${HOUR}" =~ ^[0-9]+$ ]] || [ "${HOUR}" -lt 0 ] || [ "${HOUR}" -gt 23 ]; then
 printf 'render-sac-daily-report-timer: invalid SAC_DAILY_REPORT_HOUR=%s\n' "${HOUR}" >&2
 exit 1
fi

HOUR_PADDED="$(printf '%02d' "${HOUR}")"

cat >"${OUTPUT}" <<EOF
[Unit]
Description=Daily SAC report aggregation and notify

[Timer]
OnCalendar=*-*-* ${HOUR_PADDED}:00:00
Timezone=${TZ_NAME}
Persistent=true

[Install]
WantedBy=timers.target
EOF

printf 'render-sac-daily-report-timer: wrote %s (OnCalendar=%s:00:00 Timezone=%s)\n' \
 "${OUTPUT}" "${HOUR_PADDED}" "${TZ_NAME}"