import { ParsedMessage } from '../message_handler';
import { OperationHandler } from './operation_handler';
import { OperationPlugin } from './operation_plugin';

export abstract class OperationBase implements OperationPlugin {
    // Shared operation codes
    public static readonly operationCodes = {
        OK: 'OK',
        ERR: 'ERR',
        END: 'END',
    };

    // Default handler for OK operation
    public static handleOk(parsedMessage: ParsedMessage): ParsedMessage {
        console.log('OK operation received');
        return parsedMessage;  // Typically, you would just acknowledge with OK, returning as-is
    }

    // Default handler for ERR operation
    public static handleErr(parsedMessage: ParsedMessage): ParsedMessage {
        console.log('ERR operation received: ', parsedMessage.metaInfo?.message || 'No error details provided');
        return parsedMessage;  // Typically, you would log the error and return
    }

    // Default handler for END operation
    public static handleEnd(parsedMessage: ParsedMessage): ParsedMessage {
        console.log('END operation received');
        return {
            operationCode: OperationBase.operationCodes.END,
            metaInfo: { message: 'Connection ended.' },
        };
    }

    // Register the common OK, ERR, and END handlers
    public static registerCommonOperations(operationHandler: OperationHandler): void {
        operationHandler.registerHandler(OperationBase.operationCodes.OK, OperationBase.handleOk);
        operationHandler.registerHandler(OperationBase.operationCodes.ERR, OperationBase.handleErr);
        operationHandler.registerHandler(OperationBase.operationCodes.END, OperationBase.handleEnd);
    }

    // Abstract register method that will be implemented by subclasses
    public abstract register(operationHandler: OperationHandler): void;
}