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

usage() {
  cat <<'EOF'
Usage:
  ./scripts/ensure-core-ide.sh [--fork-url <git_url>] [--upstream-url <git_url>]

What it does:
  - Ensures the Lapce checkout exists at ./core_ide (ignored by the parent repo).
  - Optionally configures remotes for a fork workflow:
      - origin   = fork (if --fork-url is provided)
      - upstream = official Lapce upstream (default: https://github.com/lapce/lapce.git)

Notes:
  - This script does not write any secrets.
  - If you cloned with --depth 1 and need full history later:
      (cd core_ide && git fetch --unshallow)
EOF
}

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
CORE_IDE_DIR="${ROOT}/core_ide"

FORK_URL=""
UPSTREAM_URL="https://github.com/lapce/lapce.git"

while [[ $# -gt 0 ]]; do
  case "$1" in
    -h|--help)
      usage
      exit 0
      ;;
    --fork-url)
      FORK_URL="${2:-}"
      shift 2
      ;;
    --upstream-url)
      UPSTREAM_URL="${2:-}"
      shift 2
      ;;
    *)
      echo "Unknown argument: $1" >&2
      usage >&2
      exit 2
      ;;
  esac
done

if [[ -d "${CORE_IDE_DIR}/.git" ]]; then
  echo "core_ide already exists: ${CORE_IDE_DIR}"
else
  echo "core_ide missing; cloning..."
  mkdir -p "${ROOT}"
  if [[ -n "${FORK_URL}" ]]; then
    git clone --depth 1 "${FORK_URL}" "${CORE_IDE_DIR}"
  else
    git clone --depth 1 "${UPSTREAM_URL}" "${CORE_IDE_DIR}"
  fi
fi

if [[ ! -f "${CORE_IDE_DIR}/Cargo.toml" ]]; then
  echo "core_ide does not look like a Lapce checkout (missing Cargo.toml): ${CORE_IDE_DIR}" >&2
  exit 1
fi

(
  cd "${CORE_IDE_DIR}"

  # Ensure upstream remote exists (official Lapce).
  if ! git remote get-url upstream >/dev/null 2>&1; then
    git remote add upstream "${UPSTREAM_URL}"
  fi

  if [[ -n "${FORK_URL}" ]]; then
    git remote set-url origin "${FORK_URL}"
  fi

  echo "Remotes:"
  git remote -v
)

echo "OK"