"""Application exceptions."""


class FailedToStartError(Exception):
    """Should be raised when application fails to start."""

    def __init__(self, reason, *args, **kwargs):
        """Create new instance of FailedToStartError.

        Args:
            reason (str): Description of failure.
        """
        super(FailedToStartError).__init__(*args, **kwargs)
        self.reason = reason

    def __str__(self):
        """Get string representation of FailedToStart error."""
        return 'Application failed to start due to: {0}'.format(self.reason)


class TranscodingFatalError(Exception):
    """Should be raised for fatal transcoding errors."""

    def __init__(self, reason, *args, **kwargs):
        """Create new instance of TranscodingFatalError.

        Args:
            reason (str): Description of failure.
        """
        super(TranscodingFatalError).__init__(*args, **kwargs)
        self.reason = reason

    def __str__(self):
        """Get string representation of TranscodingFatalError error."""
        return 'Transcoding fatal error: {0}'.format(self.reason)


class TranscodingRetryableError(Exception):
    """Should be raise for retryable transcoding errors."""

    def __init__(self, reason, *args, **kwargs):
        """Create new instance of TranscodingRetryableError.

        Args:
            reason (str): Description of failure.
        """
        super(TranscodingRetryableError).__init__(*args, **kwargs)
        self.reason = reason

    def __str__(self):
        """Get string representation of TranscodingRetryableError error."""
        return 'Transcoding retryable error: {0}'.format(self.reason)