"""Tests for configuration."""

import pytest
import os
from pathlib import Path

from config import Settings


class TestSettings:
    """Test Settings model."""

    def test_settings_from_env(self, monkeypatch):
        """Test loading settings from environment."""
        monkeypatch.setenv("API_ID", "12345678")
        monkeypatch.setenv("API_HASH", "abcdef1234567890")
        monkeypatch.setenv("PHONE", "+79991234567")
        monkeypatch.setenv("MAX_FILE_SIZE", "104857600")

        settings = Settings()

        assert settings.api_id == 12345678
        assert settings.api_hash == "abcdef1234567890"
        assert settings.phone == "+79991234567"
        assert settings.max_file_size == 104857600

    def test_settings_default_values(self, monkeypatch):
        """Test default setting values."""
        monkeypatch.setenv("API_ID", "12345678")
        monkeypatch.setenv("API_HASH", "abcdef1234567890")
        monkeypatch.setenv("PHONE", "+79991234567")

        settings = Settings()

        assert settings.session_name == "telegram-archiver"
        assert settings.max_file_size == 209715200  # 200 MB default
        assert settings.log_level == "INFO"
        assert settings.otel_enabled is False

    def test_settings_session_path(self, monkeypatch):
        """Test session_path property."""
        monkeypatch.setenv("API_ID", "12345678")
        monkeypatch.setenv("API_HASH", "abcdef1234567890")
        monkeypatch.setenv("PHONE", "+79991234567")
        monkeypatch.setenv("SESSION_NAME", "test_session")

        settings = Settings()
        session_path = settings.session_path

        assert session_path.name == "test_session.session"
        assert session_path.suffix == ".session"

    def test_settings_validate_credentials_invalid(self, monkeypatch):
        """Test credential validation."""
        monkeypatch.setenv("API_ID", "0")  # Invalid
        monkeypatch.setenv("API_HASH", "abcdef1234567890")
        monkeypatch.setenv("PHONE", "+79991234567")

        settings = Settings()

        with pytest.raises(ValueError, match="API_ID must be a positive integer"):
            settings.validate_credentials()

    def test_settings_validate_phone_format(self, monkeypatch):
        """Test phone number format validation."""
        monkeypatch.setenv("API_ID", "12345678")
        monkeypatch.setenv("API_HASH", "abcdef1234567890")
        monkeypatch.setenv("PHONE", "79991234567")  # Missing +

        settings = Settings()

        with pytest.raises(ValueError, match="PHONE must start with +"):
            settings.validate_credentials()