#!/bin/sh
set -e

REPO="nimbus-solution/nimbus-releases"
INSTALL_DIR="/usr/local/bin"
BINARY="nimbus"

# Detect OS
OS=$(uname -s | tr '[:upper:]' '[:lower:]')
case "$OS" in
  linux|darwin) ;;
  *) echo "Unsupported OS: $OS" >&2; exit 1 ;;
esac

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

# Resolve latest version
VERSION=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" \
  | grep '"tag_name"' \
  | sed 's/.*"tag_name": *"v\([^"]*\)".*/\1/')

if [ -z "$VERSION" ]; then
  echo "error: could not determine latest version" >&2
  exit 1
fi

FILENAME="${BINARY}_${VERSION}_${OS}_${ARCH}.tar.gz"
URL="https://github.com/${REPO}/releases/download/v${VERSION}/${FILENAME}"

echo "Installing nimbus v${VERSION} (${OS}/${ARCH})..."

# Download and extract to a temp dir
TMP=$(mktemp -d)
trap 'rm -rf "$TMP"' EXIT

curl -fsSL "$URL" -o "$TMP/$FILENAME"
tar -xzf "$TMP/$FILENAME" -C "$TMP"

# Install — fall back to ~/.local/bin if /usr/local/bin is not writable
if [ ! -w "$INSTALL_DIR" ]; then
  INSTALL_DIR="$HOME/.local/bin"
  mkdir -p "$INSTALL_DIR"
fi

install -m 755 "$TMP/$BINARY" "$INSTALL_DIR/$BINARY"

echo "nimbus v${VERSION} installed to $INSTALL_DIR/$BINARY"

# Remind user to add to PATH if using the fallback location
if [ "$INSTALL_DIR" = "$HOME/.local/bin" ]; then
  echo ""
  echo "Add to your PATH if needed:"
  echo "  echo 'export PATH=\"\$HOME/.local/bin:\$PATH\"' >> ~/.zshrc && source ~/.zshrc"
fi