#!/usr/bin/env bash
# Ringa CLI Installer
# Usage: curl -fsSL https://install.ringa.com.br | sh
set -euo pipefail

BASE_URL="${RINGA_BASE_URL:-https://install.ringa.com.br}"
INSTALL_DIR="${RINGA_INSTALL_DIR:-$HOME/.ringa/bin}"

# Detect OS and arch
OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
ARCH="$(uname -m)"

case "${ARCH}" in
  x86_64|amd64) ARCH="amd64" ;;
  aarch64|arm64) ARCH="arm64" ;;
  *) echo "Unsupported architecture: ${ARCH}"; exit 1 ;;
esac

case "${OS}" in
  linux) SUFFIX="linux-${ARCH}" ;;
  darwin) SUFFIX="darwin-${ARCH}" ;;
  *) echo "Unsupported OS: ${OS}"; exit 1 ;;
esac

BINARY="ringa-${SUFFIX}"
VERSION_URL="${BASE_URL}/VERSION"
CHECKSUMS_URL="${BASE_URL}/checksums.txt"

# Get latest version
echo "=> Detecting latest version..."
VERSION="$(curl -fsSL "${VERSION_URL}" | tr -d '\r\n')"

if [ -z "${VERSION}" ]; then
  echo "Error: Could not determine latest version"
  exit 1
fi

echo "=> Installing Ringa CLI ${VERSION} (${OS}/${ARCH})"

# Download
URL="${BASE_URL}/${BINARY}"
echo "=> Downloading ${URL}..."

mkdir -p "${INSTALL_DIR}"
TMP_BIN="$(mktemp "${TMPDIR:-/tmp}/ringa.XXXXXX")"
TMP_CHECKSUMS="$(mktemp "${TMPDIR:-/tmp}/ringa-checksums.XXXXXX")"
trap 'rm -f "${TMP_BIN}" "${TMP_CHECKSUMS}"' EXIT

curl -fsSL "${URL}" -o "${TMP_BIN}"
curl -fsSL "${CHECKSUMS_URL}" -o "${TMP_CHECKSUMS}"

if command -v sha256sum >/dev/null 2>&1; then
  EXPECTED="$(grep " ${BINARY}\$" "${TMP_CHECKSUMS}" | awk '{print $1}')"
  ACTUAL="$(sha256sum "${TMP_BIN}" | awk '{print $1}')"
elif command -v shasum >/dev/null 2>&1; then
  EXPECTED="$(grep " ${BINARY}\$" "${TMP_CHECKSUMS}" | awk '{print $1}')"
  ACTUAL="$(shasum -a 256 "${TMP_BIN}" | awk '{print $1}')"
else
  EXPECTED=""
  ACTUAL=""
fi

if [ -n "${EXPECTED}" ] && [ "${EXPECTED}" != "${ACTUAL}" ]; then
  echo "Error: checksum validation failed for ${BINARY}"
  exit 1
fi

mv "${TMP_BIN}" "${INSTALL_DIR}/ringa"
chmod +x "${INSTALL_DIR}/ringa"

# Add to PATH if not already there
if ! echo "$PATH" | tr ':' '\n' | grep -q "${INSTALL_DIR}"; then
  SHELL_RC=""
  case "${SHELL:-}" in
    */zsh) SHELL_RC="$HOME/.zshrc" ;;
    */bash) SHELL_RC="$HOME/.bashrc" ;;
    *) SHELL_RC="$HOME/.profile" ;;
  esac

  if [ -n "${SHELL_RC}" ] && ! grep -q "${INSTALL_DIR}" "${SHELL_RC}" 2>/dev/null; then
    echo "" >> "${SHELL_RC}"
    echo "# Ringa CLI" >> "${SHELL_RC}"
    echo "export PATH=\"${INSTALL_DIR}:\$PATH\"" >> "${SHELL_RC}"
    echo "=> Added ${INSTALL_DIR} to PATH in ${SHELL_RC}"
  fi
fi

echo ""
echo "=> Ringa CLI ${VERSION} installed to ${INSTALL_DIR}/ringa"
echo ""
echo "   Run 'ringa install' to complete setup."
echo "   Run 'ringa --help' for usage."
echo ""
echo "   If ringa is not found, restart your terminal or run:"
echo "   export PATH=\"${INSTALL_DIR}:\$PATH\""