"""Tests for debug helpers."""

from __future__ import annotations

import io

from rich.console import Console

from rp.debug import DEBUG_ENV_VAR, env_debug_enabled, log_debug, make_debug_logger


class TestEnvDebugEnabled:
    """Environment-based debug mode toggles."""

    def test_disabled_by_default(self) -> None:
        assert env_debug_enabled({}) is False

    def test_false_like_values_disable_debug(self) -> None:
        for value in ["", "0", "false", "no", "off"]:
            assert env_debug_enabled({DEBUG_ENV_VAR: value}) is False

    def test_false_like_values_are_trimmed_and_case_insensitive(self) -> None:
        for value in [" False ", "\tNO\n", " Off "]:
            assert env_debug_enabled({DEBUG_ENV_VAR: value}) is False

    def test_truthy_values_enable_debug(self) -> None:
        assert env_debug_enabled({DEBUG_ENV_VAR: "1"}) is True
        assert env_debug_enabled({DEBUG_ENV_VAR: "true"}) is True

    def test_truthy_values_are_trimmed_and_case_insensitive(self) -> None:
        for value in [" TRUE ", " Yes ", "\ton\n"]:
            assert env_debug_enabled({DEBUG_ENV_VAR: value}) is True


class TestMakeDebugLogger:
    """Console-backed debug logger output."""

    def test_logs_visible_prefix(self) -> None:
        stream = io.StringIO()
        console = Console(file=stream, force_terminal=False)
        logger = make_debug_logger(console, enabled=True)

        assert logger is not None
        logger("hello")

        assert stream.getvalue() == "[rp debug] hello\n"


class TestLogDebug:
    """Nil-safe debug logger forwarding."""

    def test_noop_when_logger_is_none(self) -> None:
        log_debug(None, "hello")

    def test_forwards_to_logger(self) -> None:
        messages: list[str] = []

        log_debug(messages.append, "hello")

        assert messages == ["hello"]