#!/usr/bin/env bash
# Evomedia.net Token Savers — https://github.com/kellymichels/zscripts-token-savers
# Created by Kelly Michels · dev@evomedia.net
# Licensed under the MIT License. See LICENSE.
#
# setup_backup_schedule — schedule daily zbackup_and_sync via cron.
# (The PowerShell version creates a Windows Scheduled Task; this is the cron equivalent.)
#
# Usage:
#   setup_backup_schedule              # print the crontab line to add
#   setup_backup_schedule --install    # append it to your crontab (2:00 AM daily)
#   setup_backup_schedule --time 03:30 --install

set -uo pipefail
_HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$_HERE/zhelpers.sh"
z_track_start "$@"

install=0; at_time="02:00"
while [ $# -gt 0 ]; do
  case "$1" in
    --install) install=1; shift ;;
    --time)    at_time="${2:-02:00}"; shift 2 ;;
    *)         err "Unknown option: $1"; exit 1 ;;
  esac
done

hh="${at_time%%:*}"; mm="${at_time##*:}"
if ! [[ "$hh" =~ ^[0-9]{1,2}$ && "$mm" =~ ^[0-9]{2}$ ]] || [ "$hh" -gt 23 ] || [ "$mm" -gt 59 ]; then
  err "Invalid --time '$at_time' (expected HH:MM, 24h)"; exit 1
fi

cron_line="${mm#0} ${hh#0} * * * $_HERE/zbackup_and_sync all >> \$HOME/zbackup_and_sync.log 2>&1"

info "=== Backup schedule (cron) ==="
dim  "Daily at $at_time:"
printf '\n  %s\n\n' "$cron_line"

if [ "$install" -eq 1 ]; then
  z_require crontab
  if crontab -l 2>/dev/null | grep -qF "$_HERE/zbackup_and_sync"; then
    warn "A crontab entry for zbackup_and_sync already exists - not adding a duplicate."
    dim  "Edit it with: crontab -e"
    exit 0
  fi
  ( crontab -l 2>/dev/null; printf '%s\n' "$cron_line" ) | crontab - \
    || { err "Failed to update crontab."; exit 1; }
  ok "Installed. Verify with: crontab -l"
else
  dim "Run with --install to add it to your crontab, or add it manually with: crontab -e"
fi