const { platform, arch } = process;
const path = require('path');

// Platform mapping for @ruvector/tiny-dancer
const platformMap = {
  'linux': {
    'x64': { package: '@ruvector/tiny-dancer-linux-x64-gnu', file: 'ruvector-tiny-dancer.linux-x64-gnu.node' },
    'arm64': { package: '@ruvector/tiny-dancer-linux-arm64-gnu', file: 'ruvector-tiny-dancer.linux-arm64-gnu.node' }
  },
  'darwin': {
    'x64': { package: '@ruvector/tiny-dancer-darwin-x64', file: 'ruvector-tiny-dancer.darwin-x64.node' },
    'arm64': { package: '@ruvector/tiny-dancer-darwin-arm64', file: 'ruvector-tiny-dancer.darwin-arm64.node' }
  },
  'win32': {
    'x64': { package: '@ruvector/tiny-dancer-win32-x64-msvc', file: 'ruvector-tiny-dancer.win32-x64-msvc.node' }
  }
};

function loadNativeModule() {
  const platformInfo = platformMap[platform]?.[arch];

  if (!platformInfo) {
    throw new Error(
      `Unsupported platform: ${platform}-${arch}\n` +
      `@ruvector/tiny-dancer native module is available for:\n` +
      `- Linux (x64, ARM64)\n` +
      `- macOS (x64, ARM64)\n` +
      `- Windows (x64)\n\n` +
      `Install the package for your platform:\n` +
      `  npm install @ruvector/tiny-dancer`
    );
  }

  // Try local .node file first (for development and bundled packages)
  try {
    const localPath = path.join(__dirname, platformInfo.file);
    return require(localPath);
  } catch (localError) {
    // Fall back to platform-specific package
    try {
      return require(platformInfo.package);
    } catch (error) {
      if (error.code === 'MODULE_NOT_FOUND') {
        throw new Error(
          `Native module not found for ${platform}-${arch}\n` +
          `Please install: npm install ${platformInfo.package}\n` +
          `Or reinstall @ruvector/tiny-dancer to get optional dependencies`
        );
      }
      throw error;
    }
  }
}

module.exports = loadNativeModule();