#!/usr/bin/env bash
# Try to acquire agent-loop.lock. Exit 0 and create lock if none or stale (>24h). Exit 1 if lock is recent.
# Run from repo root. Used by agent-loop agent before starting x cycles (section 2).
#
# Usage:
#   cd <racine_projet> && ./ia_dev/gitea-issues/agent-loop-lock-acquire.sh
#
set -euo pipefail
if [ -n "${HOME:-}" ] && [ -r "$HOME/.bashrc" ]; then
  set +u
  # shellcheck source=/dev/null
  source "$HOME/.bashrc" 2>/dev/null || true
  set -u
fi

GITEA_ISSUES_DIR="${GITEA_ISSUES_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)}"
ROOT="$(cd "${GITEA_ISSUES_DIR}/../.." && pwd)"
export GITEA_ISSUES_DIR
export REPO_ROOT="${ROOT}"
cd "$ROOT"
# shellcheck source=lib.sh
source "${GITEA_ISSUES_DIR}/lib.sh" 2>/dev/null || true
LOGS_GITEA="${PROJECT_LOGS_DIR:-$ROOT/logs}/gitea-issues"

LOCK_FILE="${AGENT_LOOP_LOCK_FILE:-$LOGS_GITEA/agent-loop.lock}"
STALE_SEC=$((24 * 3600))  # 24 hours
mkdir -p "$(dirname "$LOCK_FILE")"

if [ -f "$LOCK_FILE" ]; then
  mtime=$(stat -c %Y "$LOCK_FILE" 2>/dev/null) || mtime=0
  now=$(date +%s)
  if [ $((now - mtime)) -lt "$STALE_SEC" ]; then
    echo "[agent-loop-lock-acquire] $(date -Iseconds) — Lock actif: $LOCK_FILE (mtime < 24 h). Ne pas lancer une deuxième instance." >&2
    exit 1
  fi
fi

printf "%s\n%s\n" "$$" "$(date -Iseconds)" > "$LOCK_FILE"
echo "[agent-loop-lock-acquire] $(date -Iseconds) — Lock acquis: $LOCK_FILE"