#!/bin/sh
set -e

# Vikasit Code Installer
# Usage: curl -fsSL https://vikasit.ai/install | sh

REPO="Vikasit-AI/releases"
BINARY="vikasit"

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

  case "$OS" in
    linux) OS="linux" ;;
    darwin) OS="darwin" ;;
    *) echo "Unsupported OS: $OS"; exit 1 ;;
  esac

  case "$ARCH" in
    x86_64|amd64) ARCH="x64" ;;
    aarch64|arm64) ARCH="arm64" ;;
    *) echo "Unsupported architecture: $ARCH"; exit 1 ;;
  esac

  echo "${OS}-${ARCH}"
}

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

PLATFORM=$(detect_platform)
VERSION=$(get_latest_version)

if [ -z "$VERSION" ]; then
  echo "Failed to fetch latest version"
  exit 1
fi

echo "Installing Vikasit Code v$VERSION for $PLATFORM..."

# Determine file extension
case "$PLATFORM" in
  linux-*) EXT="tar.gz" ;;
  darwin-*) EXT="zip" ;;
esac

URL="https://github.com/$REPO/releases/download/v$VERSION/vikasit-code-$PLATFORM.$EXT"
INSTALL_DIR="/usr/local/bin"
TMP_DIR=$(mktemp -d)

echo "Downloading from $URL..."
curl -fsSL "$URL" -o "$TMP_DIR/vikasit.$EXT"

echo "Extracting..."
cd "$TMP_DIR"
case "$EXT" in
  tar.gz) tar xzf "vikasit.$EXT" ;;
  zip) unzip -q "vikasit.$EXT" ;;
esac

echo "Installing to $INSTALL_DIR..."
if [ -w "$INSTALL_DIR" ]; then
  mv "$BINARY" "$INSTALL_DIR/$BINARY"
else
  sudo mv "$BINARY" "$INSTALL_DIR/$BINARY"
fi
chmod +x "$INSTALL_DIR/$BINARY"

# Cleanup
rm -rf "$TMP_DIR"

echo ""
echo "✓ Vikasit Code v$VERSION installed successfully!"
echo ""
echo "Run 'vikasit' to get started."