import { Logger } from '@rondo.dev/logger'
import { ValidationError } from '@rondo.dev/validator'
import { ErrorHandler } from './ErrorHandler'
import { Middleware } from './Middleware'

export class ErrorApiHandler implements Middleware {
  constructor(readonly logger: Logger) {}

  handle: ErrorHandler = (err, req, res, next) => {
    this.logger.error('%s An API error occurred: %s',
      req.correlationId, err.stack)
    const statusCode = this.getStatus(err)
    res.status(statusCode)
    if (ValidationError.isInstanceOf(err)) {
      res.json({
        error: err.message,
        errors: err.errors,
      })
      return
    }
    res.json({
      error: 'An error occurred',
      errors: [],
    })
  }

  protected getStatus(err: Error): number {
    if (typeof (err as any).status === 'number') {
      return (err as any).status
    }
    return 500
  }
}