"""Tests for CLI commands module."""

import tempfile
from pathlib import Path
from unittest.mock import MagicMock, patch

import pytest
from typer.testing import CliRunner

from codexchange.main import app
from codexchange.cli.commands import (
    show_supported_languages,
    convert_cmd,
    batch_convert_cmd,
    list_models_cmd,
    list_languages_cmd,
)


runner = CliRunner()


class TestListLanguages:
    """Tests for list-languages command."""

    def test_list_languages_cmd(self):
        """Test list-languages command executes without error."""
        result = runner.invoke(app, ["list-languages"])
        assert result.exit_code == 0
        assert "Supported Languages" in result.output

    def test_show_supported_languages(self):
        """Test show_supported_languages function."""
        result = runner.invoke(app, ["list-languages"])
        assert "JavaScript" in result.output
        assert "TypeScript" in result.output
        assert "Python" in result.output
        assert "Java" in result.output


class TestListModels:
    """Tests for list-models command."""

    @patch("codexchange.cli.commands.connect")
    @patch("codexchange.cli.commands.list_models")
    def test_list_models_success(self, mock_list, mock_connect):
        """Test list-models command with successful connection."""
        from codexchange.models import ModelInfo
        mock_list.return_value = [
            ModelInfo(name="codellama", size="4GB", modified_at="2024-01-01"),
            ModelInfo(name="llama2", size="7GB", modified_at="2024-01-02"),
        ]
        
        result = runner.invoke(app, ["list-models"])
        
        assert result.exit_code == 0

    @patch("codexchange.cli.commands.connect")
    def test_list_models_connection_error(self, mock_connect):
        """Test list-models command with connection error."""
        mock_connect.side_effect = Exception("Connection failed")
        
        result = runner.invoke(app, ["list-models"])
        
        assert result.exit_code == 1
        assert "Error" in result.output


class TestConvert:
    """Tests for convert command."""

    @patch("codexchange.cli.commands.connect")
    def test_convert_file_success(self, mock_connect, sample_python_code):
        """Test converting a file successfully."""
        mock_ollama = MagicMock()
        mock_ollama.generate.return_value = "console.log('Hello');"
        mock_connect.return_value = mock_ollama
        
        with tempfile.NamedTemporaryFile(mode="w", suffix=".py", delete=False) as f:
            f.write(sample_python_code)
            input_file = f.name
        
        try:
            result = runner.invoke(app, [
                "convert",
                input_file,
                "--from", "python",
                "--to", "javascript",
                "--model", "codellama"
            ])
            
            assert result.exit_code == 0
            assert "Hello" in result.output or "conversion" in result.output.lower()
        finally:
            Path(input_file).unlink()

    def test_convert_file_not_found(self):
        """Test convert with non-existent file."""
        result = runner.invoke(app, [
            "convert",
            "/nonexistent/file.py",
            "--from", "python",
            "--to", "javascript"
        ])
        
        assert result.exit_code == 1
        assert "not found" in result.output.lower()

    def test_convert_invalid_source_language(self):
        """Test convert with invalid source language."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".py", delete=False) as f:
            f.write("print('hello')")
            input_file = f.name
        
        try:
            result = runner.invoke(app, [
                "convert",
                input_file,
                "--from", "invalid-lang",
                "--to", "javascript"
            ])
            
            assert result.exit_code == 1
            assert "Unsupported" in result.output
        finally:
            Path(input_file).unlink()

    def test_convert_invalid_target_language(self):
        """Test convert with invalid target language."""
        with tempfile.NamedTemporaryFile(mode="w", suffix=".py", delete=False) as f:
            f.write("print('hello')")
            input_file = f.name
        
        try:
            result = runner.invoke(app, [
                "convert",
                input_file,
                "--from", "python",
                "--to", "invalid-lang"
            ])
            
            assert result.exit_code == 1
            assert "Unsupported" in result.output
        finally:
            Path(input_file).unlink()


class TestBatchConvert:
    """Tests for batch-convert command."""

    @patch("codexchange.cli.commands.connect")
    def test_batch_convert_directory(self, mock_connect, sample_python_code):
        """Test batch converting a directory."""
        mock_ollama = MagicMock()
        mock_ollama.generate.return_value = "console.log('Hello');"
        mock_connect.return_value = mock_ollama
        
        with tempfile.TemporaryDirectory() as tmpdir:
            (Path(tmpdir) / "file1.py").write_text(sample_python_code)
            (Path(tmpdir) / "file2.py").write_text(sample_python_code)
            
            result = runner.invoke(app, [
                "batch-convert",
                tmpdir,
                "--from", "python",
                "--to", "javascript",
                "--concurrency", "1"
            ])
            
            assert result.exit_code == 0
            assert "file1.py" in result.output or "Successfully" in result.output

    def test_batch_convert_directory_not_found(self):
        """Test batch convert with non-existent directory."""
        result = runner.invoke(app, [
            "batch-convert",
            "/nonexistent/dir",
            "--from", "python",
            "--to", "javascript"
        ])
        
        assert result.exit_code == 1
        assert "not found" in result.output.lower()

    def test_batch_convert_no_files_found(self):
        """Test batch convert with directory having no matching files."""
        with tempfile.TemporaryDirectory() as tmpdir:
            (Path(tmpdir) / "readme.txt").write_text("README")
            
            result = runner.invoke(app, [
                "batch-convert",
                tmpdir,
                "--from", "python",
                "--to", "javascript"
            ])
            
            assert result.exit_code == 0
            assert "No" in result.output or "found" in result.output.lower()


class TestMainApp:
    """Tests for main app entry point."""

    def test_app_help(self):
        """Test app help command."""
        result = runner.invoke(app, ["--help"])
        assert result.exit_code == 0
        assert "CodeXchange" in result.output
        assert "convert" in result.output
        assert "batch-convert" in result.output

    def test_app_no_args(self):
        """Test app with no arguments shows help or error."""
        result = runner.invoke(app)
        assert result.exit_code in [0, 2]