export class AdapterLoader {
  static load(options, defaultAdapter) {
    let adapter;

    // We have options and options have adapter key
    if (options) {
      // Pass an adapter as a module name, a function or an instance
      if (typeof options == "string" || typeof options == "function" || options.constructor != Object) {
        adapter = options;
      }
      if (options.adapter) {
        adapter = options.adapter;
      }
    }
    
    if (!adapter) {
      adapter = defaultAdapter;
    }

    // This is a string, require the module
    if (typeof adapter === "string") {
      adapter = require(adapter);
      // If it's define as a module, get the default
      if (adapter.default) {
        adapter = adapter.default;
      }
    }
    // From there it's either a function or an object
    // if it's an function, instanciate and pass the options 
    if (typeof adapter === "function") {
      var Adapter = adapter;
      adapter = new Adapter(options);
    }
    return adapter;
  }
}

export default AdapterLoader;