import parsePackageName from 'parse-package-name';

export default async function(code, imports, scripts) {
  const replacements = [];

  for (const [index, item] of imports.entries()) {
    const moduleName = `__npm_module_${index}`;
    const pkg = parsePackageName(item.module);
    const version = pkg.version || 'latest';
    scripts.push({
      path: pkg.path ? `/${pkg.path}` : '',
      name: moduleName,
      module:
        pkg.name === 'vue' && !pkg.path
          ? `vue@${version}/dist/vue.esm.js`
          : `${pkg.name}@${version}`
    });
    let replacement = '\n';
    for (const variable of item.variables) {
      if (variable.imported === 'default') {
        replacement += `var ${
          variable.local
        } = ${moduleName}.default || ${moduleName};\n`;
      } else {
        replacement += `var ${variable.local} = ${moduleName}.${
          variable.imported
        };\n`;
      }
    }
    if (replacement) {
      replacements.push(replacement);
    }
  }

  if (replacements.length > 0) {
    code = replacements.join('\n') + code;
  }

  return code;
}