"""Test YAML file validation against UserInput schema."""

from pathlib import Path

import pytest
import yaml
from pydantic import ValidationError

from sentinel.user_input import UserInput


class TestYAMLValidation:
    """Test that all YAML files in examples/ validate against UserInput schema."""

    @pytest.fixture(scope="class")
    def examples_directory(self) -> Path:
        """Get the examples directory path.

        Returns:
            Path: Path to the examples directory.
        """
        return Path(__file__).parent.parent / "examples"

    @pytest.fixture(scope="class")
    def all_yaml_files(self, examples_directory: Path) -> list[Path]:
        """Get all YAML files in the examples directory.

        Args:
            examples_directory: Path to the examples directory.

        Returns:
            list[Path]: List of all YAML files found in the examples directory.
        """
        return list(examples_directory.rglob("*.yaml"))

    def test_yaml_files_exist(self, all_yaml_files: list[Path]) -> None:
        """Test that we found YAML files to validate.

        Args:
            all_yaml_files: List of all YAML files found in the examples directory.
        """
        assert len(all_yaml_files) > 0, "No YAML files found in examples directory"
        print(f"Found {len(all_yaml_files)} YAML files to validate")

    @pytest.mark.parametrize(
        "yaml_file",
        [
            pytest.param(p, id=p.relative_to(Path(__file__).parent.parent).as_posix())
            for p in (Path(__file__).parent.parent / "examples").rglob("*.yaml")
        ],
    )
    def test_individual_yaml_validation(self, yaml_file: Path) -> None:
        """Test that each YAML file validates against UserInput schema.

        Args:
            yaml_file: Path to the YAML file to validate.
        """
        assert yaml_file.exists(), f"YAML file does not exist: {yaml_file}"

        try:
            with yaml_file.open("r", encoding="utf-8") as file:
                data = yaml.safe_load(file)

            user_input = UserInput.model_validate(data)
            assert user_input is not None

        except yaml.YAMLError as error:
            pytest.fail(f"YAML parsing error in {yaml_file}: {error}")
        except ValidationError as error:
            error_details = []
            for error_detail in error.errors():
                field_path = " -> ".join(str(loc) for loc in error_detail["loc"])
                error_details.append(
                    f"  Field '{field_path}': {error_detail['msg']} "
                    f"(input: {error_detail.get('input', 'N/A')})"
                )
            pytest.fail(
                f"Validation error in {yaml_file}:\n" + "\n".join(error_details)
            )

    def test_all_yaml_files_valid(self, all_yaml_files: list[Path]) -> None:
        """Test that all YAML files are valid (batch validation).

        Args:
            all_yaml_files: List of all YAML files found in the examples directory.
        """
        failed_files = []

        for yaml_file in all_yaml_files:
            try:
                with yaml_file.open("r", encoding="utf-8") as file:
                    data = yaml.safe_load(file)
                UserInput.model_validate(data)
            except Exception as error:
                failed_files.append((yaml_file, str(error)))

        if failed_files:
            error_message = "YAML validation failures:\n"
            for file_path, error in failed_files:
                error_message += f"  {file_path}: {error}\n"
            pytest.fail(error_message)

        print(f"✅ All {len(all_yaml_files)} YAML files passed validation")

    def test_yaml_files_summary(self, all_yaml_files: list[Path]) -> None:
        """Test that provides a summary of all YAML files found.

        Args:
            all_yaml_files: List of all YAML files found in the examples directory.
        """
        categories = {}
        for yaml_file in all_yaml_files:
            # Get the relative path from examples directory
            rel_path = yaml_file.relative_to(Path(__file__).parent.parent / "examples")
            category = str(rel_path.parent) if rel_path.parent != Path(".") else "root"

            if category not in categories:
                categories[category] = []
            categories[category].append(rel_path.name)

        print(f"\nYAML Files Summary ({len(all_yaml_files)} total):")
        for category, files in sorted(categories.items()):
            print(f"  {category}: {len(files)} files")
            for file_name in sorted(files):
                print(f"    - {file_name}")

        # This test always passes - it's just for information
        assert True