"""
Tests for FileSelector component - no GUI required.
"""

import pytest
from pathlib import Path
import tempfile

from src.ui.models import FileItem, FileStatus


class TestFileSelectorConstants:
    """Test FileSelector constants and configuration."""

    def test_supported_extensions(self):
        """Test supported file extensions."""
        from src.ui.file_selector import FileSelector

        expected = [".txt", ".md", ".html", ".htm"]
        assert FileSelector.SUPPORTED_EXTENSIONS == expected

    def test_file_filter(self):
        """Test file filter string."""
        from src.ui.file_selector import FileSelector

        filter_str = FileSelector.FILE_FILTER
        assert "*.txt" in filter_str
        assert "*.md" in filter_str
        assert "*.html" in filter_str


class TestFileScanner:
    """Test FileScanner thread logic."""

    def test_scanner_initialization(self):
        """Test scanner initialization with path and extensions."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt"]

            scanner = FileScanner(test_path, extensions)

            assert scanner._path == test_path
            assert scanner._extensions == extensions
            assert scanner._is_running is True

    def test_is_supported_file(self):
        """Test file extension checking."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt", ".md"]

            scanner = FileScanner(test_path, extensions)

            # Create test files
            (test_path / "test.txt").touch()
            (test_path / "test.md").touch()
            (test_path / "test.html").touch()

            assert scanner._is_supported_file(test_path / "test.txt") is True
            assert scanner._is_supported_file(test_path / "test.md") is True
            assert scanner._is_supported_file(test_path / "test.html") is False

    def test_create_file_item(self):
        """Test FileItem creation from path."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt"]

            # Create a test file with content
            test_file = test_path / "test.txt"
            test_file.write_text("Hello, World!")

            scanner = FileScanner(test_path, extensions)
            item = scanner._create_file_item(test_file)

            assert isinstance(item, FileItem)
            assert item.name == "test.txt"
            assert item.path == test_file
            assert item.size == len("Hello, World!")
            assert item.status == FileStatus.PENDING

    def test_stop_scanner(self):
        """Test stopping the scanner."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt"]

            scanner = FileScanner(test_path, extensions)
            scanner.stop()

            assert scanner._is_running is False


class TestFileItemExtensions:
    """Test FileItem extensions for file selector."""

    def test_file_item_with_real_file(self):
        """Test FileItem with actual file stats."""
        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir) / "novel.txt"
            content = "This is a test novel file.\n" * 10
            test_path.write_text(content)

            item = FileItem(
                path=test_path,
                name=test_path.name,
                size=test_path.stat().st_size,
                status=FileStatus.READY
            )

            assert item.name == "novel.txt"
            assert item.size == len(content)
            assert item.status == FileStatus.READY
            assert item.total_words == 0
            assert item.translated_words == 0

    def test_file_item_progress(self):
        """Test FileItem progress calculation."""
        item = FileItem(
            path=Path("/test/novel.txt"),
            name="novel.txt",
            size=10000,
            total_words=5000,
            translated_words=2500,
            status=FileStatus.TRANSLATING
        )

        assert item.progress == 50.0

    def test_file_item_size_formatting(self):
        """Test FileItem size formatting for various sizes."""
        # Bytes
        item1 = FileItem(Path("/test/small.txt"), "small.txt", 512)
        assert "B" in item1.size_formatted

        # Kilobytes
        item2 = FileItem(Path("/test/medium.txt"), "medium.txt", 2048)
        assert "KB" in item2.size_formatted

        # Megabytes
        item3 = FileItem(Path("/test/large.txt"), "large.txt", 1024 * 1024 * 5)
        assert "MB" in item3.size_formatted


class TestFileValidation:
    """Test file validation logic."""

    def test_validate_existing_files(self):
        """Test validation of existing files."""
        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)

            # Create test files
            (test_path / "test.txt").touch()
            (test_path / "test.md").touch()
            (test_path / "test.html").touch()

            files = [
                test_path / "test.txt",
                test_path / "test.md",
                test_path / "test.html",
            ]

            # All should be valid
            for file_path in files:
                assert file_path.exists()
                assert file_path.is_file()

    def test_validate_nonexistent_file(self):
        """Test validation of non-existent file."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt"]

            scanner = FileScanner(test_path, extensions)
            nonexistent = test_path / "does_not_exist.txt"

            assert scanner._is_supported_file(nonexistent) is True
            assert nonexistent.exists() is False

    def test_validate_unsupported_extension(self):
        """Test validation of unsupported file type."""
        from src.ui.file_selector import FileScanner

        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)
            extensions = [".txt", ".md"]

            scanner = FileScanner(test_path, extensions)

            # Create file with unsupported extension
            unsupported = test_path / "test.pdf"
            unsupported.touch()

            assert scanner._is_supported_file(unsupported) is False

    def test_validate_directory_vs_file(self):
        """Test validation distinguishes files from directories."""
        with tempfile.TemporaryDirectory() as tmpdir:
            test_path = Path(tmpdir)

            # Create a directory
            test_dir = test_path / "subdir"
            test_dir.mkdir()

            # Create a file
            test_file = test_path / "test.txt"
            test_file.touch()

            assert test_dir.is_dir() is True
            assert test_file.is_file() is True
            assert test_dir.is_file() is False
            assert test_file.is_dir() is False