"""
Tests for ZIP utilities
"""

import pytest
import tempfile
import zipfile
import shutil
from pathlib import Path
from unittest.mock import Mock

from src.utils.zip_utils import ZipHandler


class TestZipHandler:
    
    def setup_method(self):
        """Setup test fixtures"""
        self.zip_handler = ZipHandler()
        
        # Create temporary directory for test files
        self.test_dir = Path(tempfile.mkdtemp())
        
    def teardown_method(self):
        """Clean up test fixtures"""
        if self.test_dir.exists():
            shutil.rmtree(self.test_dir)
        
        # Clean up any ZIP handler temp directories
        if self.zip_handler.temp_base_dir.exists():
            shutil.rmtree(self.zip_handler.temp_base_dir)
    
    def test_is_zip_file_valid_zip(self):
        """Test ZIP file detection with valid ZIP file"""
        # Create a valid ZIP file
        zip_file = self.test_dir / "test.zip"
        with zipfile.ZipFile(zip_file, 'w') as zf:
            zf.writestr("test.txt", "test content")
        
        assert self.zip_handler.is_zip_file(str(zip_file)) is True
    
    def test_is_zip_file_invalid_zip(self):
        """Test ZIP file detection with invalid ZIP file"""
        # Create a file that's not a ZIP
        not_zip_file = self.test_dir / "test.txt"
        not_zip_file.write_text("This is not a ZIP file")
        
        assert self.zip_handler.is_zip_file(str(not_zip_file)) is False
    
    def test_is_zip_file_nonexistent(self):
        """Test ZIP file detection with non-existent file"""
        nonexistent_file = self.test_dir / "does_not_exist.zip"
        assert self.zip_handler.is_zip_file(str(nonexistent_file)) is False
    
    def test_is_zip_file_wrong_extension(self):
        """Test ZIP file detection with wrong extension"""
        # Create a valid ZIP file but with wrong extension
        zip_file = self.test_dir / "test.txt"
        with zipfile.ZipFile(zip_file, 'w') as zf:
            zf.writestr("test.txt", "test content")
        
        assert self.zip_handler.is_zip_file(str(zip_file)) is False
    
    def test_extract_ada_project_success(self):
        """Test successful Ada project extraction"""
        # Create a ZIP file with Ada files
        zip_file = self.test_dir / "ada_project.zip"
        with zipfile.ZipFile(zip_file, 'w') as zf:
            zf.writestr("main.ads", "package Main is end Main;")
            zf.writestr("utils/helper.adb", "package body Helper is end Helper;")
            zf.writestr("config.ada", "package Config is end Config;")
            zf.writestr("readme.txt", "Not an Ada file")
        
        # Extract the project
        ada_project_path, session_dir = self.zip_handler.extract_ada_project(str(zip_file))
        
        # Verify extraction
        assert Path(ada_project_path).exists()
        assert Path(session_dir).exists()
        
        # Verify Ada files were extracted
        ada_project = Path(ada_project_path)
        assert (ada_project / "main.ads").exists()
        assert (ada_project / "utils" / "helper.adb").exists()
        assert (ada_project / "config.ada").exists()
        assert (ada_project / "readme.txt").exists()
    
    def test_extract_ada_project_no_ada_files(self):
        """Test extraction with ZIP containing no Ada files"""
        # Create a ZIP file without Ada files
        zip_file = self.test_dir / "no_ada.zip"
        with zipfile.ZipFile(zip_file, 'w') as zf:
            zf.writestr("readme.txt", "No Ada files here")
            zf.writestr("config.json", '{"key": "value"}')
        
        # Should raise ValueError
        with pytest.raises(ValueError, match="No Ada files found"):
            self.zip_handler.extract_ada_project(str(zip_file))
    
    def test_extract_ada_project_nonexistent_zip(self):
        """Test extraction with non-existent ZIP file"""
        nonexistent_zip = self.test_dir / "does_not_exist.zip"
        
        with pytest.raises(FileNotFoundError, match="does not exist"):
            self.zip_handler.extract_ada_project(str(nonexistent_zip))
    
    def test_extract_ada_project_invalid_zip(self):
        """Test extraction with invalid ZIP file"""
        # Create a file that's not a ZIP
        invalid_zip = self.test_dir / "invalid.zip"
        invalid_zip.write_text("Not a ZIP file")
        
        with pytest.raises(zipfile.BadZipFile, match="Not a valid ZIP file"):
            self.zip_handler.extract_ada_project(str(invalid_zip))
    
    def test_find_ada_project_root_single_file(self):
        """Test finding project root with single Ada file"""
        # Create directory structure with single Ada file
        test_extracted = self.test_dir / "extracted"
        test_extracted.mkdir()
        subdir = test_extracted / "project"
        subdir.mkdir()
        (subdir / "main.ads").write_text("package Main is end Main;")
        
        # Find root
        root = self.zip_handler._find_ada_project_root(test_extracted)
        assert root == subdir
    
    def test_find_ada_project_root_multiple_files(self):
        """Test finding project root with multiple Ada files"""
        # Create directory structure with multiple Ada files
        test_extracted = self.test_dir / "extracted"
        test_extracted.mkdir()
        
        # Create Ada files in same directory
        (test_extracted / "main.ads").write_text("package Main is end Main;")
        (test_extracted / "utils.adb").write_text("package body Utils is end Utils;")
        
        # Find root
        root = self.zip_handler._find_ada_project_root(test_extracted)
        assert root == test_extracted
    
    def test_find_ada_project_root_nested_structure(self):
        """Test finding project root with nested directory structure"""
        # Create nested directory structure
        test_extracted = self.test_dir / "extracted"
        test_extracted.mkdir()
        
        project_root = test_extracted / "my_project"
        project_root.mkdir()
        
        # Create Ada files in nested structure
        (project_root / "main.ads").write_text("package Main is end Main;")
        
        subdir = project_root / "src"
        subdir.mkdir()
        (subdir / "utils.adb").write_text("package body Utils is end Utils;")
        
        # Find root
        root = self.zip_handler._find_ada_project_root(test_extracted)
        assert root == project_root
    
    def test_create_python_project_zip_success(self):
        """Test successful Python project ZIP creation"""
        # Create a Python project directory structure
        python_project = self.test_dir / "python_project"
        python_project.mkdir()
        
        # Create project files
        src_dir = python_project / "src"
        src_dir.mkdir()
        (src_dir / "main.py").write_text("def main(): pass")
        (src_dir / "__init__.py").write_text("")
        
        tests_dir = python_project / "tests"
        tests_dir.mkdir()
        (tests_dir / "test_main.py").write_text("def test_main(): pass")
        (tests_dir / "__init__.py").write_text("")
        
        (python_project / "README.md").write_text("# Python Project")
        
        # Create ZIP
        zip_path = self.zip_handler.create_python_project_zip(str(python_project))
        
        # Verify ZIP was created
        assert Path(zip_path).exists()
        assert Path(zip_path).suffix == ".zip"
        
        # Verify ZIP contents
        with zipfile.ZipFile(zip_path, 'r') as zf:
            file_list = zf.namelist()
            assert "src/main.py" in file_list
            assert "src/__init__.py" in file_list
            assert "tests/test_main.py" in file_list
            assert "tests/__init__.py" in file_list
            assert "README.md" in file_list
    
    def test_create_python_project_zip_nonexistent_project(self):
        """Test ZIP creation with non-existent project directory"""
        nonexistent_project = self.test_dir / "does_not_exist"
        
        with pytest.raises(FileNotFoundError, match="does not exist"):
            self.zip_handler.create_python_project_zip(str(nonexistent_project))
    
    def test_create_python_project_zip_custom_output_path(self):
        """Test ZIP creation with custom output path"""
        # Create a Python project directory
        python_project = self.test_dir / "python_project"
        python_project.mkdir()
        (python_project / "main.py").write_text("def main(): pass")
        
        # Create ZIP with custom path
        custom_zip_path = self.test_dir / "custom_name.zip"
        zip_path = self.zip_handler.create_python_project_zip(
            str(python_project), 
            str(custom_zip_path)
        )
        
        # Verify custom path was used
        assert zip_path == str(custom_zip_path)
        assert custom_zip_path.exists()
    
    def test_extract_ada_project_with_session_id(self):
        """Test Ada project extraction with custom session ID"""
        # Create a ZIP file with Ada files
        zip_file = self.test_dir / "ada_project.zip"
        with zipfile.ZipFile(zip_file, 'w') as zf:
            zf.writestr("main.ads", "package Main is end Main;")
        
        # Extract with custom session ID
        custom_session_id = "test_session_123"
        ada_project_path, session_dir = self.zip_handler.extract_ada_project(
            str(zip_file), 
            session_id=custom_session_id
        )
        
        # Verify session ID was used in path
        assert custom_session_id in session_dir
        assert Path(session_dir).exists()
        assert Path(ada_project_path).exists()