#!/usr/bin/env sh
# Headless loop script for overnight Claude Code automation.
# Set CLAUDE_AUTONOMOUS=1 for Ralph Wiggum (Stop hook blocks until plan is complete).
set -eu

PROJECT_DIR="${CLAUDE_PROJECT_DIR:-$(cd "$(dirname "$0")/.." && pwd)}"
PROMPT_FILE="${PROMPT_FILE:-$PROJECT_DIR/loop/prompt.md}"
LOG_FILE="${LOG_FILE:-$PROJECT_DIR/loop/loop.log}"
ITERATION_COUNT="${ITERATION_COUNT:-1}"
ITERATION_DELAY="${ITERATION_DELAY:-600}"
CLAUDE_BIN="${CLAUDE_BIN:-claude}"

cd "$PROJECT_DIR"

echo "=== Overnight loop started $(date '+%Y-%m-%dT%H:%M:%S' 2>/dev/null || date) ===" | tee -a "$LOG_FILE"
echo "  PROMPT_FILE=$PROMPT_FILE" | tee -a "$LOG_FILE"
echo "  CLAUDE_AUTONOMOUS=${CLAUDE_AUTONOMOUS:-0}" | tee -a "$LOG_FILE"
echo "  ITERATION_COUNT=$ITERATION_COUNT" | tee -a "$LOG_FILE"
echo "" | tee -a "$LOG_FILE"

i=1
while [ "$i" -le "$ITERATION_COUNT" ]; do
  echo "--- Iteration $i/$ITERATION_COUNT @ $(date '+%Y-%m-%dT%H:%M:%S' 2>/dev/null || date) ---" | tee -a "$LOG_FILE"
  export CLAUDE_PROJECT_DIR="$PROJECT_DIR"
  export CLAUDE_AUTONOMOUS="${CLAUDE_AUTONOMOUS:-1}"

  # Run Claude with autonomous permissions; prompt from file
  if [ -f "$PROMPT_FILE" ]; then
    "$CLAUDE_BIN" -p --dangerously-skip-permissions --output-format=stream-json \
      < "$PROMPT_FILE" 2>&1 | tee -a "$LOG_FILE" || true
  else
    echo "Error: $PROMPT_FILE not found" | tee -a "$LOG_FILE"
    exit 1
  fi

  i=$((i + 1))
  if [ "$i" -le "$ITERATION_COUNT" ] && [ "$ITERATION_DELAY" -gt 0 ]; then
    echo "Waiting ${ITERATION_DELAY}s before next iteration..." | tee -a "$LOG_FILE"
    sleep "$ITERATION_DELAY"
  fi
done

echo "=== Loop complete $(date '+%Y-%m-%dT%H:%M:%S' 2>/dev/null || date) ===" | tee -a "$LOG_FILE"