#!/bin/bash
set -euo pipefail

REPO="confighub/sdk"
VERSION="${VERSION:-latest}"

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

# Normalize arch naming
case "$ARCH" in
  x86_64) ARCH="amd64" ;;
  aarch64 | arm64) ARCH="arm64" ;;
  *) echo "Unsupported architecture: $ARCH" && exit 1 ;;
esac

# Normalize OS naming
case "$OS" in
  darwin | linux) ;;  # supported
  *) echo "Unsupported OS: $OS" && exit 1 ;;
esac

# Resolve latest version if needed
if [ "$VERSION" = "latest" ]; then
  VERSION=$(curl -fsSL "https://api.github.com/repos/$REPO/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')
  if [ -z "$VERSION" ]; then
    echo "Failed to determine latest version" && exit 1
  fi
fi

BASE_URL="https://github.com/$REPO/releases/download/$VERSION"

mkdir -p "$HOME/.confighub/bin"

echo "Installing ConfigHub CLI $VERSION ($OS/$ARCH)..."

echo "Downloading cub..."
curl -fsSL "$BASE_URL/cub-$OS-$ARCH" -o "$HOME/.confighub/bin/cub"
chmod +x "$HOME/.confighub/bin/cub"

echo "Downloading cub-worker-run..."
curl -fsSL "$BASE_URL/cub-worker-run-$OS-$ARCH" -o "$HOME/.confighub/bin/cub-worker-run"
chmod +x "$HOME/.confighub/bin/cub-worker-run"

echo ""
echo "Installation complete ($VERSION). Add cub to your PATH using your preferred method. E.g:"
echo "  sudo ln -sf $HOME/.confighub/bin/cub /usr/local/bin/cub"
echo "  ln -sf $HOME/.confighub/bin/cub \$HOME/bin/cub"
echo "  export PATH=\$HOME/.confighub/bin:\$PATH"
echo ""
echo "Then run 'cub --help' to get started"