/**
 * Integration test for direct function imports in MCP server
 */

import { jest } from '@jest/globals';
import path, { dirname } from 'path';
import { fileURLToPath } from 'url';

// Get the current module's directory
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// Test file paths
const testProjectRoot = path.join(__dirname, '../../fixtures');
const testTasksPath = path.join(testProjectRoot, 'test-tasks.json');

// Create explicit mock functions
const mockExistsSync = jest.fn().mockReturnValue(true);
const mockWriteFileSync = jest.fn();
const mockReadFileSync = jest.fn();
const mockUnlinkSync = jest.fn();
const mockMkdirSync = jest.fn();

const mockFindTasksJsonPath = jest.fn().mockReturnValue(testTasksPath);
const mockReadJSON = jest.fn();
const mockWriteJSON = jest.fn();
const mockEnableSilentMode = jest.fn();
const mockDisableSilentMode = jest.fn();
const mockReadComplexityReport = jest.fn().mockReturnValue(null);

const mockGetAnthropicClient = jest.fn().mockReturnValue({});
const mockGetConfiguredAnthropicClient = jest.fn().mockReturnValue({});
const mockHandleAnthropicStream = jest.fn().mockResolvedValue(
	JSON.stringify([
		{
			id: 1,
			title: 'Mock Subtask 1',
			description: 'First mock subtask',
			dependencies: [],
			details: 'Implementation details for mock subtask 1'
		},
		{
			id: 2,
			title: 'Mock Subtask 2',
			description: 'Second mock subtask',
			dependencies: [1],
			details: 'Implementation details for mock subtask 2'
		}
	])
);
const mockParseSubtasksFromText = jest.fn().mockReturnValue([
	{
		id: 1,
		title: 'Mock Subtask 1',
		description: 'First mock subtask',
		status: 'pending',
		dependencies: []
	},
	{
		id: 2,
		title: 'Mock Subtask 2',
		description: 'Second mock subtask',
		status: 'pending',
		dependencies: [1]
	}
]);

// Create a mock for expandTask that returns predefined responses instead of making real calls
const mockExpandTask = jest
	.fn()
	.mockImplementation(
		(taskId, numSubtasks, useResearch, additionalContext, options) => {
			const task = {
				...(sampleTasks.tasks.find((t) => t.id === taskId) || {}),
				subtasks: useResearch
					? [
							{
								id: 1,
								title: 'Research-Backed Subtask 1',
								description: 'First research-backed subtask',
								status: 'pending',
								dependencies: []
							},
							{
								id: 2,
								title: 'Research-Backed Subtask 2',
								description: 'Second research-backed subtask',
								status: 'pending',
								dependencies: [1]
							}
						]
					: [
							{
								id: 1,
								title: 'Mock Subtask 1',
								description: 'First mock subtask',
								status: 'pending',
								dependencies: []
							},
							{
								id: 2,
								title: 'Mock Subtask 2',
								description: 'Second mock subtask',
								status: 'pending',
								dependencies: [1]
							}
						]
			};

			return Promise.resolve(task);
		}
	);

const mockGenerateTaskFiles = jest.fn().mockResolvedValue(true);
const mockFindTaskById = jest.fn();
const mockTaskExists = jest.fn().mockReturnValue(true);

// Mock fs module to avoid file system operations
jest.mock('fs', () => ({
	existsSync: mockExistsSync,
	writeFileSync: mockWriteFileSync,
	readFileSync: mockReadFileSync,
	unlinkSync: mockUnlinkSync,
	mkdirSync: mockMkdirSync
}));

// Mock utils functions to avoid actual file operations
jest.mock('../../../scripts/modules/utils.js', () => ({
	readJSON: mockReadJSON,
	writeJSON: mockWriteJSON,
	enableSilentMode: mockEnableSilentMode,
	disableSilentMode: mockDisableSilentMode,
	readComplexityReport: mockReadComplexityReport,
	CONFIG: {
		model: 'claude-3-7-sonnet-20250219',
		maxTokens: 8192,
		temperature: 0.2,
		defaultSubtasks: 5
	}
}));

// Mock path-utils with findTasksJsonPath
jest.mock('../../../mcp-server/src/core/utils/path-utils.js', () => ({
	findTasksJsonPath: mockFindTasksJsonPath
}));

// Mock the AI module to prevent any real API calls
jest.mock('../../../scripts/modules/ai-services-unified.js', () => ({
	// Mock the functions exported by ai-services-unified.js as needed
	// For example, if you are testing a function that uses generateTextService:
	generateTextService: jest.fn().mockResolvedValue('Mock AI Response')
	// Add other mocks for generateObjectService, streamTextService if used
}));

// Mock task-manager.js to avoid real operations
jest.mock('../../../scripts/modules/task-manager.js', () => ({
	expandTask: mockExpandTask,
	generateTaskFiles: mockGenerateTaskFiles,
	findTaskById: mockFindTaskById,
	taskExists: mockTaskExists
}));

// Import dependencies after mocks are set up
import { sampleTasks } from '../../fixtures/sample-tasks.js';

// Mock logger
const mockLogger = {
	info: jest.fn(),
	error: jest.fn(),
	debug: jest.fn(),
	warn: jest.fn()
};

// Mock session
const mockSession = {
	env: {
		ANTHROPIC_API_KEY: 'mock-api-key',
		MODEL: 'claude-3-sonnet-20240229',
		MAX_TOKENS: 4000,
		TEMPERATURE: '0.2'
	}
};

describe('MCP Server Direct Functions', () => {
	// Set up before each test
	beforeEach(() => {
		jest.clearAllMocks();

		// Default mockReadJSON implementation
		mockReadJSON.mockReturnValue(JSON.parse(JSON.stringify(sampleTasks)));

		// Default mockFindTaskById implementation
		mockFindTaskById.mockImplementation((tasks, taskId) => {
			const id = parseInt(taskId, 10);
			return tasks.find((t) => t.id === id);
		});

		// Default mockTaskExists implementation
		mockTaskExists.mockImplementation((tasks, taskId) => {
			const id = parseInt(taskId, 10);
			return tasks.some((t) => t.id === id);
		});

		// Default findTasksJsonPath implementation
		mockFindTasksJsonPath.mockImplementation((args) => {
			// Mock returning null for non-existent files
			if (args.file === 'non-existent-file.json') {
				return null;
			}
			return testTasksPath;
		});
	});

	describe('listTasksDirect', () => {
		// Sample complexity report for testing
		const mockComplexityReport = {
			meta: {
				generatedAt: '2025-03-24T20:01:35.986Z',
				tasksAnalyzed: 3,
				thresholdScore: 5,
				projectName: 'Test Project',
				usedResearch: false
			},
			complexityAnalysis: [
				{
					taskId: 1,
					taskTitle: 'Initialize Project',
					complexityScore: 3,
					recommendedSubtasks: 2
				},
				{
					taskId: 2,
					taskTitle: 'Create Core Functionality',
					complexityScore: 8,
					recommendedSubtasks: 5
				},
				{
					taskId: 3,
					taskTitle: 'Implement UI Components',
					complexityScore: 6,
					recommendedSubtasks: 4
				}
			]
		};

		// Test wrapper function that doesn't rely on the actual implementation
		async function testListTasks(args, mockLogger) {
			// File not found case
			if (args.file === 'non-existent-file.json') {
				mockLogger.error('Tasks file not found');
				return {
					success: false,
					error: {
						code: 'FILE_NOT_FOUND_ERROR',
						message: 'Tasks file not found'
					}
				};
			}

			// Check for complexity report
			const complexityReport = mockReadComplexityReport();
			let tasksData = [...sampleTasks.tasks];

			// Add complexity scores if report exists
			if (complexityReport && complexityReport.complexityAnalysis) {
				tasksData = tasksData.map((task) => {
					const analysis = complexityReport.complexityAnalysis.find(
						(a) => a.taskId === task.id
					);
					if (analysis) {
						return { ...task, complexityScore: analysis.complexityScore };
					}
					return task;
				});
			}

			// Success case
			if (!args.status && !args.withSubtasks) {
				return {
					success: true,
					data: {
						tasks: tasksData,
						stats: {
							total: tasksData.length,
							completed: tasksData.filter((t) => t.status === 'done').length,
							inProgress: tasksData.filter((t) => t.status === 'in-progress')
								.length,
							pending: tasksData.filter((t) => t.status === 'pending').length
						}
					}
				};
			}

			// Status filter case
			if (args.status) {
				const filteredTasks = tasksData.filter((t) => t.status === args.status);
				return {
					success: true,
					data: {
						tasks: filteredTasks,
						filter: args.status,
						stats: {
							total: tasksData.length,
							filtered: filteredTasks.length
						}
					}
				};
			}

			// Include subtasks case
			if (args.withSubtasks) {
				return {
					success: true,
					data: {
						tasks: tasksData,
						includeSubtasks: true,
						stats: {
							total: tasksData.length
						}
					}
				};
			}

			// Default case
			return {
				success: true,
				data: { tasks: [] }
			};
		}

		test('should return all tasks when no filter is provided', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath
			};

			// Act
			const result = await testListTasks(args, mockLogger);

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.tasks.length).toBe(sampleTasks.tasks.length);
			expect(result.data.stats.total).toBe(sampleTasks.tasks.length);
		});

		test('should filter tasks by status', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				status: 'pending'
			};

			// Act
			const result = await testListTasks(args, mockLogger);

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.filter).toBe('pending');
			// Should only include pending tasks
			result.data.tasks.forEach((task) => {
				expect(task.status).toBe('pending');
			});
		});

		test('should include subtasks when requested', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				withSubtasks: true
			};

			// Act
			const result = await testListTasks(args, mockLogger);

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.includeSubtasks).toBe(true);

			// Verify subtasks are included for tasks that have them
			const tasksWithSubtasks = result.data.tasks.filter(
				(t) => t.subtasks && t.subtasks.length > 0
			);
			expect(tasksWithSubtasks.length).toBeGreaterThan(0);
		});

		test('should handle file not found errors', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: 'non-existent-file.json'
			};

			// Act
			const result = await testListTasks(args, mockLogger);

			// Assert
			expect(result.success).toBe(false);
			expect(result.error.code).toBe('FILE_NOT_FOUND_ERROR');
			expect(mockLogger.error).toHaveBeenCalled();
		});

		test('should include complexity scores when complexity report exists', async () => {
			// Arrange
			mockReadComplexityReport.mockReturnValueOnce(mockComplexityReport);
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				withSubtasks: true
			};

			// Act
			const result = await testListTasks(args, mockLogger);
			// Assert
			expect(result.success).toBe(true);

			// Check that tasks have complexity scores from the report
			mockComplexityReport.complexityAnalysis.forEach((analysis) => {
				const task = result.data.tasks.find((t) => t.id === analysis.taskId);
				if (task) {
					expect(task.complexityScore).toBe(analysis.complexityScore);
				}
			});
		});
	});

	describe('expandTaskDirect', () => {
		// Test wrapper function that returns appropriate results based on the test case
		async function testExpandTask(args, mockLogger, options = {}) {
			// Missing task ID case
			if (!args.id) {
				mockLogger.error('Task ID is required');
				return {
					success: false,
					error: {
						code: 'INPUT_VALIDATION_ERROR',
						message: 'Task ID is required'
					}
				};
			}

			// Non-existent task ID case
			if (args.id === '999') {
				mockLogger.error(`Task with ID ${args.id} not found`);
				return {
					success: false,
					error: {
						code: 'TASK_NOT_FOUND',
						message: `Task with ID ${args.id} not found`
					}
				};
			}

			// Completed task case
			if (args.id === '1') {
				mockLogger.error(
					`Task ${args.id} is already marked as done and cannot be expanded`
				);
				return {
					success: false,
					error: {
						code: 'TASK_COMPLETED',
						message: `Task ${args.id} is already marked as done and cannot be expanded`
					}
				};
			}

			// For successful cases, record that functions were called but don't make real calls
			mockEnableSilentMode();

			// This is just a mock call that won't make real API requests
			// We're using mockExpandTask which is already a mock function
			const expandedTask = await mockExpandTask(
				parseInt(args.id, 10),
				args.num,
				args.research || false,
				args.prompt || '',
				{ mcpLog: mockLogger, session: options.session }
			);

			mockDisableSilentMode();

			return {
				success: true,
				data: {
					task: expandedTask,
					subtasksAdded: expandedTask.subtasks.length,
					hasExistingSubtasks: false
				}
			};
		}

		test('should expand a task with subtasks', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				id: '3', // ID 3 exists in sampleTasks with status 'pending'
				num: 2
			};

			// Act
			const result = await testExpandTask(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.task).toBeDefined();
			expect(result.data.task.subtasks).toBeDefined();
			expect(result.data.task.subtasks.length).toBe(2);
			expect(mockExpandTask).toHaveBeenCalledWith(
				3, // Task ID as number
				2, // num parameter
				false, // useResearch
				'', // prompt
				expect.objectContaining({
					mcpLog: mockLogger,
					session: mockSession
				})
			);
			expect(mockEnableSilentMode).toHaveBeenCalled();
			expect(mockDisableSilentMode).toHaveBeenCalled();
		});

		test('should handle missing task ID', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath
				// id is intentionally missing
			};

			// Act
			const result = await testExpandTask(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(false);
			expect(result.error.code).toBe('INPUT_VALIDATION_ERROR');
			expect(mockLogger.error).toHaveBeenCalled();
			// Make sure no real expand calls were made
			expect(mockExpandTask).not.toHaveBeenCalled();
		});

		test('should handle non-existent task ID', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				id: '999' // Non-existent task ID
			};

			// Act
			const result = await testExpandTask(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(false);
			expect(result.error.code).toBe('TASK_NOT_FOUND');
			expect(mockLogger.error).toHaveBeenCalled();
			// Make sure no real expand calls were made
			expect(mockExpandTask).not.toHaveBeenCalled();
		});

		test('should handle completed tasks', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				id: '1' // Task with 'done' status in sampleTasks
			};

			// Act
			const result = await testExpandTask(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(false);
			expect(result.error.code).toBe('TASK_COMPLETED');
			expect(mockLogger.error).toHaveBeenCalled();
			// Make sure no real expand calls were made
			expect(mockExpandTask).not.toHaveBeenCalled();
		});

		test('should use AI client when research flag is set', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				id: '3',
				research: true
			};

			// Act
			const result = await testExpandTask(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(mockExpandTask).toHaveBeenCalledWith(
				3, // Task ID as number
				undefined, // args.num is undefined
				true, // useResearch should be true
				'', // prompt
				expect.objectContaining({
					mcpLog: mockLogger,
					session: mockSession
				})
			);
			// Verify the result includes research-backed subtasks
			expect(result.data.task.subtasks[0].title).toContain('Research-Backed');
		});
	});

	describe('expandAllTasksDirect', () => {
		// Test wrapper function that returns appropriate results based on the test case
		async function testExpandAllTasks(args, mockLogger, options = {}) {
			// For successful cases, record that functions were called but don't make real calls
			mockEnableSilentMode();

			// Mock expandAllTasks - now returns a structured object instead of undefined
			const mockExpandAll = jest.fn().mockImplementation(async () => {
				// Return the new structured response that matches the actual implementation
				return {
					success: true,
					expandedCount: 2,
					failedCount: 0,
					skippedCount: 1,
					tasksToExpand: 3,
					telemetryData: {
						timestamp: new Date().toISOString(),
						commandName: 'expand-all-tasks',
						totalCost: 0.05,
						totalTokens: 1000,
						inputTokens: 600,
						outputTokens: 400
					}
				};
			});

			// Call mock expandAllTasks with the correct signature
			const result = await mockExpandAll(
				args.file, // tasksPath
				args.num, // numSubtasks
				args.research || false, // useResearch
				args.prompt || '', // additionalContext
				args.force || false, // force
				{
					mcpLog: mockLogger,
					session: options.session,
					projectRoot: args.projectRoot
				}
			);

			mockDisableSilentMode();

			return {
				success: true,
				data: {
					message: `Expand all operation completed. Expanded: ${result.expandedCount}, Failed: ${result.failedCount}, Skipped: ${result.skippedCount}`,
					details: {
						expandedCount: result.expandedCount,
						failedCount: result.failedCount,
						skippedCount: result.skippedCount,
						tasksToExpand: result.tasksToExpand
					},
					telemetryData: result.telemetryData
				}
			};
		}

		test('should expand all pending tasks with subtasks', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				num: 3
			};

			// Act
			const result = await testExpandAllTasks(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.message).toMatch(/Expand all operation completed/);
			expect(result.data.details.expandedCount).toBe(2);
			expect(result.data.details.failedCount).toBe(0);
			expect(result.data.details.skippedCount).toBe(1);
			expect(result.data.details.tasksToExpand).toBe(3);
			expect(result.data.telemetryData).toBeDefined();
			expect(result.data.telemetryData.commandName).toBe('expand-all-tasks');
			expect(mockEnableSilentMode).toHaveBeenCalled();
			expect(mockDisableSilentMode).toHaveBeenCalled();
		});

		test('should handle research flag', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				research: true,
				num: 2
			};

			// Act
			const result = await testExpandAllTasks(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.details.expandedCount).toBe(2);
			expect(result.data.telemetryData).toBeDefined();
			expect(mockEnableSilentMode).toHaveBeenCalled();
			expect(mockDisableSilentMode).toHaveBeenCalled();
		});

		test('should handle force flag', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				force: true
			};

			// Act
			const result = await testExpandAllTasks(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.details.expandedCount).toBe(2);
			expect(result.data.telemetryData).toBeDefined();
			expect(mockEnableSilentMode).toHaveBeenCalled();
			expect(mockDisableSilentMode).toHaveBeenCalled();
		});

		test('should handle additional context/prompt', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				prompt: 'Additional context for subtasks'
			};

			// Act
			const result = await testExpandAllTasks(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.details.expandedCount).toBe(2);
			expect(result.data.telemetryData).toBeDefined();
			expect(mockEnableSilentMode).toHaveBeenCalled();
			expect(mockDisableSilentMode).toHaveBeenCalled();
		});

		test('should handle case with no eligible tasks', async () => {
			// Arrange
			const args = {
				projectRoot: testProjectRoot,
				file: testTasksPath,
				num: 3
			};

			// Act - Mock the scenario where no tasks are eligible for expansion
			async function testNoEligibleTasks(args, mockLogger, options = {}) {
				mockEnableSilentMode();

				const mockExpandAll = jest.fn().mockImplementation(async () => {
					return {
						success: true,
						expandedCount: 0,
						failedCount: 0,
						skippedCount: 0,
						tasksToExpand: 0,
						telemetryData: null,
						message: 'No tasks eligible for expansion.'
					};
				});

				const result = await mockExpandAll(
					args.file,
					args.num,
					false,
					'',
					false,
					{
						mcpLog: mockLogger,
						session: options.session,
						projectRoot: args.projectRoot
					},
					'json'
				);

				mockDisableSilentMode();

				return {
					success: true,
					data: {
						message: result.message,
						details: {
							expandedCount: result.expandedCount,
							failedCount: result.failedCount,
							skippedCount: result.skippedCount,
							tasksToExpand: result.tasksToExpand
						},
						telemetryData: result.telemetryData
					}
				};
			}

			const result = await testNoEligibleTasks(args, mockLogger, {
				session: mockSession
			});

			// Assert
			expect(result.success).toBe(true);
			expect(result.data.message).toBe('No tasks eligible for expansion.');
			expect(result.data.details.expandedCount).toBe(0);
			expect(result.data.details.tasksToExpand).toBe(0);
			expect(result.data.telemetryData).toBeNull();
		});
	});
});