#!/bin/bash
# Varaverk job runner — wraps script execution with JSON status tracking.
# Called by /etc/cron.d/varaverk for every scheduled job.
#
# Usage: bash run_job.sh <job_id> <script_path> [flags...]
#
# Writes: /var/log/varaverk/<id>.json — status, timestamps, exit code, pid
#         /var/log/varaverk/<id>.log  — appended per run, trimmed to LOG_MAX_LINES
#
# Status values: running → ok (exit 0) | warn (exit 1) | error (exit 2+)

JOB_ID="$1"
SCRIPT="$2"
shift 2

LOG_DIR="/var/log/varaverk"
BASE="${JOB_ID%.sh}"
LOG_FILE="$LOG_DIR/$BASE.log"
STAT_FILE="$LOG_DIR/$BASE.json"
LOG_MAX_LINES=1000

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

START=$(date +%s)
printf '{"id":"%s","status":"running","start":%s,"pid":%s}\n' \
    "$JOB_ID" "$START" "$$" > "$STAT_FILE"

printf '\n── %s ────────────────────────────────────────────────\n' \
    "$(date '+%Y-%m-%d %H:%M:%S')" >> "$LOG_FILE"

bash "$SCRIPT" "$@" >> "$LOG_FILE" 2>&1
EC=$?

END=$(date +%s)
if   [ "$EC" -eq 0 ]; then STATUS="ok"
elif [ "$EC" -eq 1 ]; then STATUS="warn"
else                        STATUS="error"
fi

printf '{"id":"%s","status":"%s","start":%s,"end":%s,"exit":%s}\n' \
    "$JOB_ID" "$STATUS" "$START" "$END" "$EC" > "$STAT_FILE"

# Trim to last LOG_MAX_LINES to prevent unbounded growth
line_count=$(wc -l < "$LOG_FILE" 2>/dev/null || echo 0)
if [ "$line_count" -gt "$LOG_MAX_LINES" ]; then
    tail -n "$LOG_MAX_LINES" "$LOG_FILE" > "${LOG_FILE}.tmp" && mv "${LOG_FILE}.tmp" "$LOG_FILE"
fi

exit $EC