"""Tests for configuration loader module."""

import os
from pathlib import Path

import pytest
from pydantic import ValidationError

from gitea_mcp_remote.config import GiteaSettings, load_settings


class TestGiteaSettings:
    """Test GiteaSettings configuration class."""

    def test_required_fields(self):
        """Test that required fields are enforced."""
        with pytest.raises(ValidationError) as exc_info:
            GiteaSettings()

        errors = exc_info.value.errors()
        # Note: gitea_repo is optional (for PMO mode)
        required_fields = {"gitea_url", "gitea_token", "gitea_owner"}
        error_fields = {error["loc"][0] for error in errors}
        assert required_fields.issubset(error_fields)

    def test_valid_configuration(self):
        """Test valid configuration creation."""
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="test_token",
            gitea_owner="test_owner",
            gitea_repo="test_repo",
        )

        assert settings.gitea_url == "https://gitea.example.com"
        assert settings.gitea_token == "test_token"
        assert settings.gitea_owner == "test_owner"
        assert settings.gitea_repo == "test_repo"
        assert settings.http_host == "127.0.0.1"
        assert settings.http_port == 8000
        assert settings.auth_token is None

    def test_gitea_url_validation(self):
        """Test Gitea URL validation."""
        # Valid URLs
        valid_urls = [
            "http://gitea.local",
            "https://gitea.example.com",
            "http://192.168.1.1:3000",
        ]

        for url in valid_urls:
            settings = GiteaSettings(
                gitea_url=url,
                gitea_token="token",
                gitea_owner="owner",
                gitea_repo="repo",
            )
            assert settings.gitea_url == url.rstrip("/")

        # Invalid URL (no protocol)
        with pytest.raises(ValidationError) as exc_info:
            GiteaSettings(
                gitea_url="gitea.example.com",
                gitea_token="token",
                gitea_owner="owner",
                gitea_repo="repo",
            )
        assert "must start with http://" in str(exc_info.value)

    def test_gitea_url_trailing_slash_removed(self):
        """Test that trailing slashes are removed from Gitea URL."""
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com/",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
        )
        assert settings.gitea_url == "https://gitea.example.com"

    def test_http_port_validation(self):
        """Test HTTP port validation."""
        # Valid port
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
            http_port=9000,
        )
        assert settings.http_port == 9000

        # Invalid port (too high)
        with pytest.raises(ValidationError):
            GiteaSettings(
                gitea_url="https://gitea.example.com",
                gitea_token="token",
                gitea_owner="owner",
                gitea_repo="repo",
                http_port=70000,
            )

        # Invalid port (too low)
        with pytest.raises(ValidationError):
            GiteaSettings(
                gitea_url="https://gitea.example.com",
                gitea_token="token",
                gitea_owner="owner",
                gitea_repo="repo",
                http_port=0,
            )

    def test_enabled_tools_list_parsing(self):
        """Test enabled_tools string parsing to list."""
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
            enabled_tools="tool1,tool2,tool3",
        )
        assert settings.enabled_tools_list == ["tool1", "tool2", "tool3"]

        # Test with spaces
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
            enabled_tools="tool1, tool2 , tool3",
        )
        assert settings.enabled_tools_list == ["tool1", "tool2", "tool3"]

        # Test empty string
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
            enabled_tools="",
        )
        assert settings.enabled_tools_list is None

    def test_disabled_tools_list_parsing(self):
        """Test disabled_tools string parsing to list."""
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="token",
            gitea_owner="owner",
            gitea_repo="repo",
            disabled_tools="tool1,tool2",
        )
        assert settings.disabled_tools_list == ["tool1", "tool2"]

    def test_get_gitea_mcp_env(self):
        """Test environment variable generation for wrapped MCP server."""
        settings = GiteaSettings(
            gitea_url="https://gitea.example.com",
            gitea_token="test_token",
            gitea_owner="test_owner",
            gitea_repo="test_repo",
        )

        env = settings.get_gitea_mcp_env()

        assert env["GITEA_BASE_URL"] == "https://gitea.example.com"
        assert env["GITEA_API_TOKEN"] == "test_token"
        assert env["GITEA_DEFAULT_OWNER"] == "test_owner"
        assert env["GITEA_DEFAULT_REPO"] == "test_repo"


class TestLoadSettings:
    """Test load_settings factory function."""

    def test_load_from_env_file(self, tmp_path):
        """Test loading settings from a .env file."""
        env_file = tmp_path / ".env"
        env_file.write_text(
            """
GITEA_URL=https://gitea.test.com
GITEA_TOKEN=test_token_123
GITEA_OWNER=test_owner
GITEA_REPO=test_repo
HTTP_PORT=9000
            """
        )

        settings = load_settings(env_file)

        assert settings.gitea_url == "https://gitea.test.com"
        assert settings.gitea_token == "test_token_123"
        assert settings.gitea_owner == "test_owner"
        assert settings.gitea_repo == "test_repo"
        assert settings.http_port == 9000

    def test_load_from_environment(self, monkeypatch):
        """Test loading settings from environment variables."""
        monkeypatch.setenv("GITEA_URL", "https://env.gitea.com")
        monkeypatch.setenv("GITEA_TOKEN", "env_token")
        monkeypatch.setenv("GITEA_OWNER", "env_owner")
        monkeypatch.setenv("GITEA_REPO", "env_repo")
        monkeypatch.setenv("HTTP_PORT", "8080")

        # Mock _env_file to prevent loading actual .env
        settings = GiteaSettings()

        assert settings.gitea_url == "https://env.gitea.com"
        assert settings.gitea_token == "env_token"
        assert settings.gitea_owner == "env_owner"
        assert settings.gitea_repo == "env_repo"
        assert settings.http_port == 8080