"""Exception classes for Summarizer API errors."""
from __future__ import annotations

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from httpx import Response


class SummarizerAPIError(Exception):
    """Base exception for Summarizer API errors."""

    def __init__(self, message: str, status_code: int | None = None) -> None:
        super().__init__(message)
        self.message = message
        self.status_code = status_code

    def __str__(self) -> str:
        if self.status_code:
            return f"[{self.status_code}] {self.message}"
        return self.message


class SummarizerConnectionError(SummarizerAPIError):
    """Raised when connection to the API fails."""

    def __init__(self, message: str = "Failed to connect to Summarizer API") -> None:
        super().__init__(message)


class SummarizerTimeoutError(SummarizerAPIError):
    """Raised when API request times out."""

    def __init__(self, message: str = "Request to Summarizer API timed out") -> None:
        super().__init__(message)


class SummarizerBadRequestError(SummarizerAPIError):
    """Raised for 400 Bad Request errors."""

    def __init__(self, message: str, response: Response | None = None) -> None:
        super().__init__(message, status_code=400)
        self.response = response


class SummarizerServerError(SummarizerAPIError):
    """Raised for 5xx server errors."""

    def __init__(self, message: str, status_code: int = 500) -> None:
        super().__init__(message, status_code=status_code)


class SummarizerRateLimitError(SummarizerAPIError):
    """Raised when rate limit is exceeded."""

    def __init__(self, message: str = "Rate limit exceeded") -> None:
        super().__init__(message, status_code=429)