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

# CodexHelper.sh — minimal wrapper to invoke Codex CLI
# - Finds a codex binary (env `CODEX_BIN`, or `codex`, or `codex-cli`)
# - Uses the repository's prompts/system_prompt.md by default
# - Passes through any extra args to the codex binary

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

if [[ ! -f "${SYSTEM_PROMPT_PATH}" ]]; then
  echo "Error: system prompt not found at ${SYSTEM_PROMPT_PATH}" >&2
  exit 1
fi

# Binary detection: prefer $CODEX_BIN, then common names
if [[ -n "${CODEX_BIN:-}" ]]; then
  BIN="${CODEX_BIN}"
elif command -v codex >/dev/null 2>&1; then
  BIN="$(command -v codex)"
elif command -v codex-cli >/dev/null 2>&1; then
  BIN="$(command -v codex-cli)"
else
  echo "Error: Could not find codex binary. Set CODEX_BIN or install 'codex'/'codex-cli'." >&2
  exit 1
fi

# Try a common flag name for supplying a system prompt. Adjust if needed.
# Additional args are forwarded so callers can customize behavior.
exec "${BIN}" --system-prompt "${SYSTEM_PROMPT_PATH}" "$@"