#!/usr/bin/env bash
# GoatCMS installer for Linux / macOS
# Auto-detects OS and CPU architecture, then installs the matching binary.
#
# Usage:
#   curl -fsSL https://goatcms.com/dist/install.sh | bash
#   curl -fsSL https://goatcms.com/dist/install.sh | bash -s -- --version 0.0.1
#   curl -fsSL https://goatcms.com/dist/install.sh | bash -s -- --dir "$HOME/.local/bin"
set -euo pipefail

VERSION="latest"
INSTALL_DIR=""

while [ $# -gt 0 ]; do
  case "$1" in
    --version) VERSION="$2";     shift 2 ;;
    --dir)     INSTALL_DIR="$2"; shift 2 ;;
    -h|--help)
      cat <<'EOF'
GoatCMS installer

Options:
  --version <v>   Install a specific version (default: latest)
  --dir <path>    Install directory (default: /usr/local/bin or $HOME/.local/bin)
  -h, --help      Show this help
EOF
      exit 0 ;;
    *) echo "Unknown option: $1" >&2; exit 1 ;;
  esac
done

# --- Resolve base URL ---------------------------------------------------
if [ "${VERSION}" = "latest" ]; then
  BASE="https://goatcms.com/dist/latest"
  curl -fsI "${BASE}/" >/dev/null 2>&1 || BASE="https://goatcms.com/dist/0.0.1"
else
  BASE="https://goatcms.com/dist/${VERSION}"
fi

# --- Detect OS ----------------------------------------------------------
OS_RAW="$(uname -s)"
case "${OS_RAW}" in
  Linux)  OS="linux"  ;;
  Darwin) OS="darwin" ;;
  *) echo "Unsupported OS: ${OS_RAW}" >&2; exit 1 ;;
esac

# --- Detect architecture ------------------------------------------------
ARCH_RAW="$(uname -m)"
case "${ARCH_RAW}" in
  x86_64|amd64)  ARCH="amd64" ;;
  aarch64|arm64) ARCH="arm64" ;;
  *) echo "Unsupported architecture: ${ARCH_RAW}" >&2; exit 1 ;;
esac

[ "${OS}" = "darwin" ] && [ "${ARCH}" = "amd64" ] && {
  echo "No darwin/amd64 build available." >&2; exit 1;
}

# --- Choose install dir -------------------------------------------------
if [ -z "${INSTALL_DIR}" ]; then
  if [ -w /usr/local/bin ]; then
    INSTALL_DIR="/usr/local/bin"
  elif [ -n "${HOME:-}" ] && [ -d "${HOME}/.local/bin" ]; then
    INSTALL_DIR="${HOME}/.local/bin"
  else
    INSTALL_DIR="/usr/local/bin"
  fi
fi

echo "Detected: OS=${OS} ARCH=${ARCH} -> ${INSTALL_DIR}"

# --- Download -----------------------------------------------------------
TMP="$(mktemp -d)"
trap 'rm -rf "${TMP}"' EXIT

if [ "${VERSION}" = "latest" ]; then
  URL="${BASE}/bin/goat_${OS}_${ARCH}"
  echo "Downloading ${URL}"
  curl -fsSL "${URL}" -o "${TMP}/goat"
else
  URL="${BASE}/archives/goat_${VERSION}_${OS}_${ARCH}.tar.gz"
  echo "Downloading ${URL}"
  curl -fsSL "${URL}" -o "${TMP}/goat.tar.gz"
  tar -xzf "${TMP}/goat.tar.gz" -C "${TMP}"
  FOUND="$(find "${TMP}" -type f -name goat -perm -u+x | head -n1 || true)"
  [ -n "${FOUND}" ] && mv "${FOUND}" "${TMP}/goat"
fi
chmod +x "${TMP}/goat"

# --- Install ------------------------------------------------------------
echo "Installing to ${INSTALL_DIR}/goat"
if [ -w "${INSTALL_DIR}" ]; then
  install -m 0755 "${TMP}/goat" "${INSTALL_DIR}/goat"
else
  sudo install -m 0755 "${TMP}/goat" "${INSTALL_DIR}/goat"
fi

# --- macOS: clear quarantine -------------------------------------------
if [ "${OS}" = "darwin" ]; then
  sudo xattr -d com.apple.quarantine "${INSTALL_DIR}/goat" 2>/dev/null || true
fi

# --- Verify -------------------------------------------------------------
echo "Done. Verifying:"
"${INSTALL_DIR}/goat" version || true