package tgapi

import (
	"errors"
	"fmt"
)

// ErrPoolUnexpected reports an unexpected result type returned from the worker pool.
var ErrPoolUnexpected = errors.New("unexpected response from pool")

// ErrPoolQueueFull reports that the internal request queue is full.
var ErrPoolQueueFull = errors.New("worker pool queue full")

// ErrPoolStopped reports that a request was submitted after the worker pool stopped.
var ErrPoolStopped = errors.New("worker pool stopped")

// ResponseError reports an unsuccessful Telegram API response.
type ResponseError struct {
	Code        int
	Description string
	Parameters  *ResponseParameters
}

// Error returns the Telegram API error code and description.
func (e *ResponseError) Error() string {
	if e == nil {
		return "<nil>"
	}
	return fmt.Sprintf("[%d] %s", e.Code, e.Description)
}