"""Tests for Local Code Assistant utilities."""

import pytest
from pathlib import Path
from unittest.mock import Mock, patch

from local_code_assistant.utils.language import (
    detect_language_from_extension,
    detect_language_from_content,
    detect_language,
    get_language_config,
    get_supported_languages,
    is_language_supported,
    get_file_extension,
    get_comment_style,
    get_testing_framework,
)
from local_code_assistant.utils.context import (
    should_ignore,
    scan_directory,
    build_context_string,
    get_project_info,
)


class TestLanguageDetection:
    """Tests for language detection utilities."""

    def test_detect_python_from_extension(self):
        """Test Python detection from extension."""
        path = Path("test.py")
        assert detect_language_from_extension(path) == "python"

    def test_detect_javascript_from_extension(self):
        """Test JavaScript detection from extension."""
        path = Path("script.js")
        assert detect_language_from_extension(path) == "javascript"

    def test_detect_typescript_from_extension(self):
        """Test TypeScript detection from extension."""
        path = Path("module.ts")
        assert detect_language_from_extension(path) == "typescript"

    def test_detect_go_from_extension(self):
        """Test Go detection from extension."""
        path = Path("main.go")
        assert detect_language_from_extension(path) == "go"

    def test_detect_rust_from_extension(self):
        """Test Rust detection from extension."""
        path = Path("lib.rs")
        assert detect_language_from_extension(path) == "rust"

    def test_detect_from_content_python(self):
        """Test Python detection from content."""
        code = "def hello():\n    print('world')"
        assert detect_language_from_content(code) == "python"

    def test_detect_from_content_javascript(self):
        """Test JavaScript detection from content."""
        code = "function hello() {\n    console.log('world');\n}"
        assert detect_language_from_content(code) == "javascript"

    def test_detect_from_content_go(self):
        """Test Go detection from content."""
        code = "func main() {\n    fmt.Println(\"Hello\")\n}"
        assert detect_language_from_content(code) == "go"

    def test_detect_from_content_rust(self):
        """Test Rust detection from content."""
        code = "fn main() {\n    println!(\"Hello\");\n}"
        assert detect_language_from_content(code) == "rust"

    def test_detect_language_combined(self):
        """Test combined detection (extension + content)."""
        path = Path("script.py")
        assert detect_language(path) == "python"

    def test_get_supported_languages(self):
        """Test getting supported languages list."""
        languages = get_supported_languages()
        assert "python" in languages
        assert "javascript" in languages

    def test_is_language_supported(self):
        """Test language support checking."""
        assert is_language_supported("python") is True
        assert is_language_supported("unknown") is False

    def test_get_file_extension(self):
        """Test file extension retrieval."""
        assert get_file_extension("python") == ".py"
        assert get_file_extension("javascript") == ".js"

    def test_get_comment_style(self):
        """Test comment style retrieval."""
        assert get_comment_style("python") == "#"
        assert get_comment_style("javascript") == "//"

    def test_get_testing_framework(self):
        """Test testing framework retrieval."""
        assert get_testing_framework("python") == "pytest"
        assert get_testing_framework("rust") == "test"


class TestContextBuilding:
    """Tests for context building utilities."""

    def test_should_ignore_python_cache(self):
        """Test ignoring __pycache__ directories."""
        path = Path("project/__pycache__/module.pyc")
        assert should_ignore(path) is True

    def test_should_ignore_git(self):
        """Test ignoring .git directories."""
        path = Path("project/.git/config")
        assert should_ignore(path) is True

    def test_should_ignore_node_modules(self):
        """Test ignoring node_modules."""
        path = Path("project/node_modules/package/index.js")
        assert should_ignore(path) is True

    def test_should_not_ignore_source_files(self):
        """Test not ignoring source files."""
        path = Path("project/src/main.py")
        assert should_ignore(path) is False

    def test_build_context_string(self):
        """Test context string building."""
        files = {
            "/project/main.py": "def main(): pass",
            "/project/utils.py": "def util(): pass"
        }
        context = build_context_string(files, max_files=5)

        assert "main.py" in context
        assert "utils.py" in context
        assert "def main(): pass" in context

    def test_build_context_string_limit(self):
        """Test context string file limit."""
        files = {
            "/project/f1.py": "code1",
            "/project/f2.py": "code2",
            "/project/f3.py": "code3"
        }
        context = build_context_string(files, max_files=2)

        assert context.count("===") == 2

    def test_scan_directory_empty(self, tmp_path):
        """Test scanning empty directory."""
        files = scan_directory(tmp_path)
        assert files == {}

    def test_scan_directory_nonexistent(self):
        """Test scanning nonexistent directory."""
        files = scan_directory(Path("/nonexistent"))
        assert files == {}

    def test_get_project_info_python(self, tmp_path):
        """Test detecting Python project."""
        (tmp_path / "pyproject.toml").write_text("[tool.poetry]")

        info = get_project_info(tmp_path)
        assert info.get("build_system") == "python"

    def test_get_project_info_javascript(self, tmp_path):
        """Test detecting JavaScript project."""
        (tmp_path / "package.json").write_text("{\"name\": \"test\"}")

        info = get_project_info(tmp_path)
        assert info.get("build_system") == "javascript"

    def test_get_project_info_go(self, tmp_path):
        """Test detecting Go project."""
        (tmp_path / "go.mod").write_text("module test")

        info = get_project_info(tmp_path)
        assert info.get("build_system") == "go"

    def test_get_project_info_rust(self, tmp_path):
        """Test detecting Rust project."""
        (tmp_path / "Cargo.toml").write_text("[package]")

        info = get_project_info(tmp_path)
        assert info.get("build_system") == "rust"