#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Test cases for read_partial_file MCP tool

Tests the partial file reading tool that provides selective
content extraction from files.
"""

import json
import tempfile
from pathlib import Path
from typing import Any, Dict
# Mock functionality now provided by pytest-mock

import pytest
import pytest_asyncio

from tree_sitter_analyzer.mcp.tools.read_partial_tool import ReadPartialTool


class TestReadPartialToolSchema:
    """Test read_partial_file tool schema and validation"""

    def setup_method(self) -> None:
        """Set up test fixtures"""
        self.tool = ReadPartialTool()

    def test_tool_schema_structure(self) -> None:
        """Test that tool schema has required structure"""
        schema = self.tool.get_tool_schema()
        
        # Test schema structure
        assert "type" in schema
        assert "properties" in schema
        assert "required" in schema
        
        # Test schema type
        assert schema["type"] == "object"
        
        # Test required fields
        assert "file_path" in schema["required"]
        
        # Test properties
        properties = schema["properties"]
        assert "file_path" in properties
        assert "start_line" in properties
        assert "end_line" in properties
        assert "start_column" in properties
        assert "end_column" in properties
        assert "format" in properties

    def test_input_parameters_validation(self) -> None:
        """Test input parameter validation"""
        # Valid arguments
        valid_args = {
            "file_path": "/path/to/file.java",
            "start_line": 1,
            "end_line": 10,
            "format": "json"
        }
        
        # Should not raise exception
        result = self.tool.validate_arguments(valid_args)
        assert result is True

    def test_required_parameters(self) -> None:
        """Test required parameter validation"""
        # Missing file_path
        invalid_args = {
            "start_line": 1,
            "end_line": 10
        }
        
        with pytest.raises(ValueError) as exc_info:
            self.tool.validate_arguments(invalid_args)
        assert "file_path" in str(exc_info.value)


class TestReadPartialToolFunctionality:
    """Test read_partial_file tool core functionality"""

    def setup_method(self) -> None:
        """Set up test fixtures"""
        self.tool = ReadPartialTool()
        self.sample_content = '''Line 1: package com.example;
Line 2: 
Line 3: import java.util.List;
Line 4: 
Line 5: /**
Line 6:  * Sample class
Line 7:  */
Line 8: public class Sample {
Line 9:     private String name;
Line 10:     
Line 11:     public String getName() {
Line 12:         return name;
Line 13:     }
Line 14: }
Line 15: '''

    def test_read_line_range_placeholder(self) -> None:
        """Test reading a specific line range - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Line range reading test placeholder"

    def test_read_single_line_placeholder(self) -> None:
        """Test reading a single line - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Single line reading test placeholder"

    def test_read_with_column_range_placeholder(self) -> None:
        """Test reading with column range - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Column range reading test placeholder"

    def test_json_format_output_placeholder(self) -> None:
        """Test JSON format output - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "JSON format output test placeholder"

    def test_read_beyond_file_end_placeholder(self) -> None:
        """Test reading beyond file end - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Read beyond file end test placeholder"


class TestReadPartialToolErrorHandling:
    """Test error handling in read_partial_file tool"""

    def setup_method(self) -> None:
        """Set up test fixtures"""
        self.tool = ReadPartialTool()

    def test_invalid_arguments(self) -> None:
        """Test validation of invalid arguments"""
        # Invalid line range
        invalid_args = {
            "file_path": "/path/to/file.java",
            "start_line": 10,
            "end_line": 5  # end < start
        }
        
        with pytest.raises(ValueError):
            self.tool.validate_arguments(invalid_args)

    def test_invalid_line_range_placeholder(self) -> None:
        """Test invalid line range handling - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Invalid line range test placeholder"

    def test_nonexistent_file_placeholder(self) -> None:
        """Test error handling for nonexistent file - placeholder"""
        # TODO: Implement proper async testing when tool is fully implemented
        assert True, "Nonexistent file test placeholder"


class TestReadPartialToolIntegration:
    """Test integration with existing file handling components"""

    def setup_method(self) -> None:
        """Set up test fixtures"""
        self.tool = ReadPartialTool()

    def test_integration_with_file_handler(self) -> None:
        """Test integration with file handling utilities"""
        from tree_sitter_analyzer.file_handler import read_file_partial
        
        # Verify file handler exists and is callable
        # Function-based API, no handler object needed
        assert callable(read_file_partial)
        
        # Test tool uses file handling
        assert True, "File handler integration placeholder"


if __name__ == "__main__":
    pytest.main([__file__])