import type { ICommand } from '../services/commands/ICommand';
import { GetSDKConfigCommand } from '../services/commands/GetSDKConfigCommand';

type SendToJavaScript = (script: string) => void;

export class CommandDispatcher {
  private commandMap: Record<string, ICommand>;
  private sendToJavaScript: SendToJavaScript;

  constructor(sendToJavaScript: SendToJavaScript) {
    this.sendToJavaScript = sendToJavaScript;

    this.commandMap = {
      GetSDKConfig: new GetSDKConfigCommand(),
    };
  }

  async dispatch(method: string, jsonParams?: string | null): Promise<void> {
    const command = this.commandMap[method];

    if (!command) {
      console.error(`CommandDispatcher: Unknown method "${method}"`);
      return;
    }

    try {
      const params =
        jsonParams && jsonParams.trim().length > 0
          ? JSON.parse(jsonParams)
          : {};

      const jsonResponse = await command.execute(params);
      this.sendResponseToJavaScript(method, jsonResponse);
    } catch (error) {
      console.error('CommandDispatcher dispatch error', error);
    }
  }

  private sendResponseToJavaScript(method: string, jsonResponse: string): void {
    const script = `window.mychipsNativeCallback('${method}', ${jsonResponse}); true;`;
    this.sendToJavaScript(script);
  }
}