#!/usr/bin/env bash
set -euo pipefail
#
# ops/install-cron.sh — idempotently install a crontab entry that runs the toknmtr agent in
# reconcile mode (`--once`) every ~10 minutes.
#
# Why this exists alongside the Stop hook (ops/install-hook.sh):
#   The hook is near-live but best-effort — it's deliberately fail-open (see
#   agent/hooks/toknmtr-capture.sh), so it silently no-ops if the project dir/config/node
#   binary is momentarily missing, and it never retries a failed push itself (a failed push
#   just leaves the file's cursor unmoved, see agent/run.ts). It also only fires on Claude
#   Code turns, so a transcript that's touched outside a tracked Stop event (or a session
#   whose final hook fire was the one that raced/failed) won't get its tail captured until
#   *something* sweeps again. This cron line is that backstop: a periodic, host-crontab-
#   driven sweep that's independent of any particular Claude Code session being open, so the
#   data self-heals even if every hook fire that session ever missed/failed.
#   Push is idempotent (PK = host+session_id+uuid, see CLAUDE.md), so overlapping
#   hook-triggered and cron-triggered sweeps are always safe to interleave.
#
# What this script does:
#   - Adds (or updates, if already present) a single crontab line running
#     `node --experimental-strip-types agent/run.ts --once` every 10 minutes, sourcing
#     ~/.toknmtr/env first for TOKNMTR_URL/TOKNMTR_TOKEN, with stdout/stderr appended to a
#     log file.
#   - Idempotent: matches by a unique marker comment, so re-running replaces (rather than
#     duplicating) the line — safe to re-run after changing TOKNMTR_PROJECT_DIR etc.
#   - Reversible: `ops/install-cron.sh --remove` deletes just the marked line; everything
#     else in the user's crontab is left untouched.
#
# Usage:
#   ops/install-cron.sh            # install/update the cron line
#   ops/install-cron.sh --remove   # remove just this cron line
#
# Override knobs (env, all optional):
#   TOKNMTR_PROJECT_DIR   path to the toknmtr repo checkout (default: ~/claude/projects/toknmtr)
#   TOKNMTR_ENV_FILE      path to the config file            (default: ~/.toknmtr/env)
#   TOKNMTR_LOG_FILE      cron sweep log path                (default: ~/.toknmtr/cron.log)
#   TOKNMTR_CRON_SCHEDULE cron schedule expression            (default: "*/10 * * * *")

PROJECT_DIR="${TOKNMTR_PROJECT_DIR:-$HOME/claude/projects/toknmtr}"
CONFIG_FILE="${TOKNMTR_ENV_FILE:-$HOME/.toknmtr/env}"
LOG_FILE="${TOKNMTR_LOG_FILE:-$HOME/.toknmtr/cron.log}"
SCHEDULE="${TOKNMTR_CRON_SCHEDULE:-*/10 * * * *}"

MARKER="# toknmtr-cron-reconcile"
CRON_CMD="cd \"$PROJECT_DIR\" && . \"$CONFIG_FILE\" && node --experimental-strip-types agent/run.ts --once >> \"$LOG_FILE\" 2>&1"
CRON_LINE="$SCHEDULE bash -lc '$CRON_CMD' $MARKER"

current_crontab() {
	crontab -l 2>/dev/null || true
}

if [ "${1:-}" = "--remove" ]; then
	existing="$(current_crontab)"
	if ! printf '%s\n' "$existing" | grep -qF "$MARKER"; then
		echo "no toknmtr cron line found, nothing to remove"
		exit 0
	fi
	printf '%s\n' "$existing" | grep -vF "$MARKER" | crontab -
	echo "removed toknmtr reconcile cron line"
	exit 0
fi

command -v crontab >/dev/null 2>&1 || {
	echo "error: crontab is required (e.g. 'sudo apt install cron') and the cron daemon must be running" >&2
	exit 1
}
[ -d "$PROJECT_DIR" ] || {
	echo "error: $PROJECT_DIR does not exist (set TOKNMTR_PROJECT_DIR?)" >&2
	exit 1
}
[ -f "$PROJECT_DIR/agent/run.ts" ] || {
	echo "error: $PROJECT_DIR/agent/run.ts not found — is TOKNMTR_PROJECT_DIR correct?" >&2
	exit 1
}

mkdir -p "$(dirname "$LOG_FILE")"

# Replace any prior toknmtr line (matched by marker) with the new one; append if absent.
existing="$(current_crontab)"
filtered="$(printf '%s\n' "$existing" | grep -vF "$MARKER" || true)"
{
	[ -n "$filtered" ] && printf '%s\n' "$filtered"
	printf '%s\n' "$CRON_LINE"
} | crontab -

echo "installed toknmtr reconcile cron line (schedule: $SCHEDULE):"
echo "  $CRON_LINE"
echo ""
echo "config read from: $CONFIG_FILE (must exist with TOKNMTR_URL / TOKNMTR_TOKEN, see ops/README.md)"
echo "sweep log:        $LOG_FILE"
echo ""
echo "to remove later:"
echo "  ops/install-cron.sh --remove"
echo "  (or run 'crontab -e' and delete the line ending in '$MARKER')"