#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
cd "${REPO_ROOT}"

SLEEP_SECONDS="${SLEEP_SECONDS:-600}"
MAX_ITERATIONS="${MAX_ITERATIONS:-0}" # 0 means run forever
CODEX_MODEL="${CODEX_MODEL:-gpt-5.3-codex}"
CODEX_REASONING_EFFORT="${CODEX_REASONING_EFFORT:-medium}"

read -r -d '' PROMPT <<'EOF' || true
1. load the refactor skill and read its SKILL.md fully from top to bottom (do not skim or partially read)
2. check previous commits to see what other agents have worked on
3. identify and work on a single large improvement based on the refactor skill (can be a file system reorg, file splitting, refactor, add a new test, harden a test, deflakify a test, fix a test, improve control flow, remove unused code)
4. commit with a description of what was done, your reasoning, and document accomplishments or challenges for the next agent

guidelines:
- focus on the server and app code, it's the most hairy
EOF

iteration=1
while true; do
  if [[ "${MAX_ITERATIONS}" -gt 0 && "${iteration}" -gt "${MAX_ITERATIONS}" ]]; then
    echo "Reached MAX_ITERATIONS=${MAX_ITERATIONS}; exiting."
    exit 0
  fi

  echo "[$(date -u +"%Y-%m-%dT%H:%M:%SZ")] Starting codex exec iteration ${iteration}"

  cmd=(
    codex exec
    --dangerously-bypass-approvals-and-sandbox
    --cd "${REPO_ROOT}"
  )

  if [[ -n "${CODEX_MODEL}" ]]; then
    cmd+=(--model "${CODEX_MODEL}")
  fi

  cmd+=(-c "model_reasoning_effort=\"${CODEX_REASONING_EFFORT}\"")

  if "${cmd[@]}" "${PROMPT}"; then
    echo "[$(date -u +"%Y-%m-%dT%H:%M:%SZ")] Iteration ${iteration} completed successfully"
  else
    status=$?
    echo "[$(date -u +"%Y-%m-%dT%H:%M:%SZ")] Iteration ${iteration} failed with exit code ${status}"
  fi

  echo "Sleeping ${SLEEP_SECONDS}s before next iteration..."
  sleep "${SLEEP_SECONDS}"
  iteration=$((iteration + 1))
done