#!/bin/bash
# Main cron wrapper — runs the daily prompt against Claude Code
set -uo pipefail

# ─── Environment ──────────────────────────────────────────────────────────────
# Cron doesn't source /etc/environment (PAM does that for interactive logins).
# Source it explicitly so env vars (notifications, API tokens, etc.) are available.
if [ -f /etc/environment ]; then
    set -a
    source /etc/environment
    set +a
fi

# Ensure locally-installed tools (like claude) are on PATH
export PATH="$HOME/.local/bin:$PATH"

# ─── Config ───────────────────────────────────────────────────────────────────
# IMPORTANT: Update PROJECT_DIR to the absolute path of your Daedalus installation
PROJECT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
PROMPT_FILE="$PROJECT_DIR/prompts/daily.md"
LOG_DIR="$PROJECT_DIR/logs"
LOG_FILE="$LOG_DIR/daily-$(date +%Y%m%d-%H%M%S).log"
MAX_TURNS="${MAX_TURNS:-200}"  # Safety limit on agentic loops
PID_FILE="$PROJECT_DIR/.claude/cron.pid"
CHECKPOINT_FILE="$PROJECT_DIR/.claude/checkpoint.md"

# Maximum age (in minutes) of the checkpoint before we consider the session stale.
# If the checkpoint was updated within this window, the session is likely still working.
STALE_THRESHOLD_MINUTES="${STALE_THRESHOLD_MINUTES:-30}"

# ─── Previous Session Cleanup ────────────────────────────────────────────────
if [ -f "$PID_FILE" ]; then
    OLD_PID=$(cat "$PID_FILE")
    if kill -0 "$OLD_PID" 2>/dev/null; then
        # Process is still alive — check if it's actually working
        # by looking at how recently the checkpoint was updated
        SESSION_ACTIVE=false
        if [ -f "$CHECKPOINT_FILE" ]; then
            CHECKPOINT_AGE=$(( ( $(date +%s) - $(stat -c %Y "$CHECKPOINT_FILE") ) / 60 ))
            if [ "$CHECKPOINT_AGE" -lt "$STALE_THRESHOLD_MINUTES" ]; then
                SESSION_ACTIVE=true
            fi
        fi

        if [ "$SESSION_ACTIVE" = true ]; then
            echo "[$(date)] Previous session (PID $OLD_PID) is still active (checkpoint updated ${CHECKPOINT_AGE}m ago). Skipping this run." >> "$LOG_DIR/cron-skip.log"
            exit 0
        else
            echo "[$(date)] Previous session (PID $OLD_PID) appears stale. Killing." >> "$LOG_DIR/cron-cleanup.log"
            kill "$OLD_PID" 2>/dev/null || true
            sleep 5
            # Force kill if still alive
            if kill -0 "$OLD_PID" 2>/dev/null; then
                kill -9 "$OLD_PID" 2>/dev/null || true
                sleep 2
            fi
        fi
    fi
    rm -f "$PID_FILE"
fi

# ─── Setup ────────────────────────────────────────────────────────────────────
mkdir -p "$LOG_DIR"
cd "$PROJECT_DIR"

echo "=============================================" >> "$LOG_FILE"
echo "Daedalus Autonomous Session"                   >> "$LOG_FILE"
echo "Started: $(date)"                              >> "$LOG_FILE"
echo "Prompt:  $PROMPT_FILE"                         >> "$LOG_FILE"
echo "Max turns: $MAX_TURNS"                         >> "$LOG_FILE"
echo "=============================================" >> "$LOG_FILE"

# ─── Run ──────────────────────────────────────────────────────────────────────
claude -p "$(cat "$PROMPT_FILE")" \
  --dangerously-skip-permissions \
  --max-turns "$MAX_TURNS" \
  --output-format text \
  >> "$LOG_FILE" 2>&1 &

CLAUDE_PID=$!
echo "$CLAUDE_PID" > "$PID_FILE"
wait "$CLAUDE_PID" && EXIT_CODE=0 || EXIT_CODE=$?

rm -f "$PID_FILE"

echo "=============================================" >> "$LOG_FILE"
echo "Finished: $(date)"                             >> "$LOG_FILE"
echo "Exit code: $EXIT_CODE"                         >> "$LOG_FILE"
echo "=============================================" >> "$LOG_FILE"

exit $EXIT_CODE