import * as fsPromises from 'fs/promises';
import { mock } from 'jest-mock-extended';
import type { IExecuteFunctions } from 'n8n-workflow';
import type { SimpleGit } from 'simple-git';

import { Git } from '../Git.node';

// Mock simple-git
const mockGit = {
	checkout: jest.fn(),
	checkoutBranch: jest.fn(),
	checkoutLocalBranch: jest.fn(),
	add: jest.fn(),
	commit: jest.fn(),
	push: jest.fn(),
	pull: jest.fn(),
	clone: jest.fn(),
	addConfig: jest.fn(),
	fetch: jest.fn(),
	log: jest.fn(),
	pushTags: jest.fn(),
	listConfig: jest.fn(),
	status: jest.fn(),
	addTag: jest.fn(),
	env: jest.fn().mockReturnThis(),
} as unknown as jest.Mocked<SimpleGit>;

jest.mock('simple-git', () => ({
	__esModule: true,
	default: () => mockGit,
}));

// Mock filesystem operations
jest.mock('fs/promises', () => ({
	access: jest.fn(),
	mkdir: jest.fn(),
}));

const mockFsPromises = jest.mocked(fsPromises);

describe('Git Node', () => {
	let gitNode: Git;
	let mockExecuteFunctions: jest.Mocked<IExecuteFunctions>;

	beforeEach(() => {
		gitNode = new Git();
		mockExecuteFunctions = mock<IExecuteFunctions>({
			getInputData: jest.fn(() => [{ json: {} }]),
			getNodeParameter: jest.fn(),
			continueOnFail: jest.fn(() => false),
			helpers: {
				returnJsonArray: jest.fn((data: any[]) => data.map((item: any) => ({ json: item }))),
			},
		});
		jest.clearAllMocks();
	});

	describe('Branch switching', () => {
		it('should switch to existing branch for commit operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: 'feature' })
				.mockReturnValueOnce('test commit');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature');
			expect(mockGit.commit).toHaveBeenCalledWith('test commit', undefined);
		});

		it('should commit specific files when pathsToAdd is provided', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({
					branch: 'feature-branch',
					files: true,
					pathsToAdd: 'src/file1.js,src/file2.js,README.md',
				})
				.mockReturnValueOnce('Add specific files');

			mockGit.checkout.mockResolvedValueOnce('Switched to branch feature-branch' as any);

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.commit).toHaveBeenCalledWith('Add specific files', [
				'src/file1.js',
				'src/file2.js',
				'README.md',
			]);
			expect(result[0]).toEqual([{ json: { success: true }, pairedItem: { item: 0 } }]);
		});

		it('should fail when trying to push to non-existent branch', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('push')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: 'non-existent-branch' })
				.mockReturnValueOnce('none');

			const error = new Error('Branch not found');
			mockGit.checkout.mockRejectedValueOnce(error);

			await expect(gitNode.execute.call(mockExecuteFunctions)).rejects.toThrow('Branch not found');

			expect(mockGit.checkout).toHaveBeenCalledWith('non-existent-branch');
			expect(mockGit.checkoutLocalBranch).not.toHaveBeenCalled();
			expect(mockGit.push).not.toHaveBeenCalled();
		});

		it('should set upstream when creating branch for commit operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: 'feature-branch' })
				.mockReturnValueOnce('commit message');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.checkoutLocalBranch).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.addConfig).toHaveBeenCalledWith('branch.feature-branch.remote', 'origin');
			expect(mockGit.addConfig).toHaveBeenCalledWith(
				'branch.feature-branch.merge',
				'refs/heads/feature-branch',
			);
			expect(mockGit.commit).toHaveBeenCalledWith('commit message', undefined);
		});

		it('should set upstream when switching to existing branch for push operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('push')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: 'existing-branch' })
				.mockReturnValueOnce('none');

			// Branch exists, so checkout succeeds
			mockGit.checkout.mockResolvedValueOnce('Switched to branch existing-branch' as any);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('existing-branch');
			expect(mockGit.checkoutLocalBranch).not.toHaveBeenCalled();
			expect(mockGit.addConfig).toHaveBeenCalledWith('branch.existing-branch.remote', 'origin');
			expect(mockGit.addConfig).toHaveBeenCalledWith(
				'branch.existing-branch.merge',
				'refs/heads/existing-branch',
			);
			expect(mockGit.push).toHaveBeenCalled();
		});

		it('should push to specific repository when repository option is provided', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('push')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({
					branch: 'feature-branch',
					repository: true,
					targetRepository: 'https://github.com/example/repo.git',
				})
				.mockReturnValueOnce('none');

			// Branch exists, so checkout succeeds
			mockGit.checkout.mockResolvedValueOnce('Switched to branch feature-branch' as any);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.push).toHaveBeenCalledWith('https://github.com/example/repo.git');
		});

		it('should not switch branch when pushing with empty branch string', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('push')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: '' }) // empty string branch
				.mockReturnValueOnce('gitPassword');

			// Mock git config for push operation
			mockGit.listConfig.mockResolvedValueOnce({
				values: { '.git/config': { 'remote.origin.url': 'https://github.com/test/repo.git' } },
			} as any);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).not.toHaveBeenCalled();
			expect(mockGit.push).toHaveBeenCalled();
		});

		it('should handle switchBranch operation to existing branch', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('existing-branch');

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('existing-branch');
			expect(result[0]).toEqual([
				{ json: { success: true, branch: 'existing-branch' }, pairedItem: { item: 0 } },
			]);
		});

		it('should create new branch when switchBranch fails and createBranch is true', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ createBranch: true })
				.mockReturnValueOnce('new-branch');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('new-branch');
			expect(mockGit.checkoutLocalBranch).toHaveBeenCalledWith('new-branch');
			expect(result[0]).toEqual([
				{ json: { success: true, branch: 'new-branch' }, pairedItem: { item: 0 } },
			]);
		});

		it('should create branch from start point when specified', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ createBranch: true, startPoint: 'main' })
				.mockReturnValueOnce('feature-branch');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.checkoutBranch).toHaveBeenCalledWith('feature-branch', 'main');
		});

		it('should force checkout when force option is enabled', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ force: true })
				.mockReturnValueOnce('force-branch');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith(['-f', 'force-branch']);
		});

		it('should throw error when createBranch is false and branch does not exist', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ createBranch: false })
				.mockReturnValueOnce('nonexistent-branch');

			const error = new Error('Branch not found');
			mockGit.checkout.mockRejectedValueOnce(error);

			await expect(gitNode.execute.call(mockExecuteFunctions)).rejects.toThrow('Branch not found');
		});

		it('should set upstream tracking when creating new branch with setUpstream option', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({
					createBranch: true,
					setUpstream: true,
					remoteName: 'origin',
				})
				.mockReturnValueOnce('feature-branch');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.checkoutLocalBranch).toHaveBeenCalledWith('feature-branch');
			expect(mockGit.addConfig).toHaveBeenCalledWith('branch.feature-branch.remote', 'origin');
			expect(mockGit.addConfig).toHaveBeenCalledWith(
				'branch.feature-branch.merge',
				'refs/heads/feature-branch',
			);
		});

		it('should use default remote name when not specified', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({
					createBranch: true,
					setUpstream: true,
					// remoteName not specified, should default to 'origin'
				})
				.mockReturnValueOnce('feature-branch');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.addConfig).toHaveBeenCalledWith('branch.feature-branch.remote', 'origin');
		});

		it('should continue successfully even if upstream setup fails', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('switchBranch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({
					createBranch: true,
					setUpstream: true,
					remoteName: 'origin',
				})
				.mockReturnValueOnce('feature-branch');

			mockGit.checkout.mockRejectedValueOnce(new Error('Branch not found'));
			mockGit.addConfig.mockRejectedValueOnce(new Error('Remote not found'));

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkoutLocalBranch).toHaveBeenCalledWith('feature-branch');
			expect(result[0]).toEqual([
				{
					json: { success: true, branch: 'feature-branch' },
					pairedItem: { item: 0 },
				},
			]);
		});

		it('should not switch branch when not specified', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({}) // no branch
				.mockReturnValueOnce('test commit');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).not.toHaveBeenCalled();
			expect(mockGit.commit).toHaveBeenCalledWith('test commit', undefined);
		});

		it('should not switch branch when empty string is provided', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: '' }) // empty string branch
				.mockReturnValueOnce('test commit');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.checkout).not.toHaveBeenCalled();
			expect(mockGit.commit).toHaveBeenCalledWith('test commit', undefined);
		});
	});

	describe('All operations coverage', () => {
		it('should handle add operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('add')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('file.txt');

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.add).toHaveBeenCalledWith(['file.txt']);
			expect(result[0]).toEqual([{ json: { success: true }, pairedItem: { item: 0 } }]);
		});

		it('should handle addConfig operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('addConfig')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('user.name')
				.mockReturnValueOnce('test user');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.addConfig).toHaveBeenCalledWith('user.name', 'test user', false);
		});

		it('should handle clone operation and create directory when it does not exist', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('clone')
				.mockReturnValueOnce('/new-repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('https://github.com/test/repo.git');

			// Simulate directory not existing - access() throws
			mockFsPromises.access.mockRejectedValueOnce(new Error('Directory does not exist'));
			mockFsPromises.mkdir.mockResolvedValueOnce(undefined);

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockFsPromises.access).toHaveBeenCalledWith('/new-repo');
			expect(mockFsPromises.mkdir).toHaveBeenCalledWith('/new-repo');
			expect(mockGit.clone).toHaveBeenCalledWith('https://github.com/test/repo.git', '.');
			expect(result[0]).toEqual([{ json: { success: true }, pairedItem: { item: 0 } }]);
		});

		it('should handle clone operation when directory already exists', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('clone')
				.mockReturnValueOnce('/existing-repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('https://github.com/test/repo.git');

			// Simulate directory already exists - access() succeeds
			mockFsPromises.access.mockResolvedValueOnce(undefined);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockFsPromises.access).toHaveBeenCalledWith('/existing-repo');
			expect(mockFsPromises.mkdir).not.toHaveBeenCalled();
			expect(mockGit.clone).toHaveBeenCalledWith('https://github.com/test/repo.git', '.');
		});

		it('should handle fetch operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('fetch')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({});

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.fetch).toHaveBeenCalled();
		});

		it('should handle pull operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('pull')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({});

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.pull).toHaveBeenCalled();
		});

		it('should handle log operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('log')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce(false) // returnAll
				.mockReturnValueOnce(10); // limit

			const mockLogData = [
				{ hash: 'abc123', message: 'test commit', author_name: 'John Doe' },
				{ hash: 'def456', message: 'another commit', author_name: 'Jane Smith' },
			];
			mockGit.log.mockResolvedValueOnce({ all: mockLogData } as any);

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.log).toHaveBeenCalledWith({ maxCount: 10 });
			expect(result[0]).toHaveLength(2);
			expect(result[0]).toEqual([
				{
					json: { hash: 'abc123', message: 'test commit', author_name: 'John Doe' },
					pairedItem: { item: 0 },
				},
				{
					json: { hash: 'def456', message: 'another commit', author_name: 'Jane Smith' },
					pairedItem: { item: 0 },
				},
			]);
		});

		it('should handle pushTags operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('pushTags')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({});

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.pushTags).toHaveBeenCalled();
		});

		it('should handle listConfig operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('listConfig')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({});

			mockGit.listConfig.mockResolvedValueOnce({
				values: { '.git/config': { 'user.name': 'test' } },
			} as any);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.listConfig).toHaveBeenCalled();
		});

		it('should handle status operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('status')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({});

			mockGit.status.mockResolvedValueOnce({ current: 'main' } as any);

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.status).toHaveBeenCalled();
		});

		it('should handle tag operation', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('tag')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('v1.0.0');

			await gitNode.execute.call(mockExecuteFunctions);

			expect(mockGit.addTag).toHaveBeenCalledWith('v1.0.0');
		});
	});

	describe('Error handling', () => {
		it('should continue on fail when enabled', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('commit')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({ branch: 'bad-branch' })
				.mockReturnValueOnce('test');

			mockExecuteFunctions.continueOnFail.mockReturnValueOnce(true);
			mockGit.checkout.mockRejectedValueOnce(new Error('Branch error'));
			mockGit.checkoutLocalBranch.mockRejectedValueOnce(new Error('Create error'));

			const result = await gitNode.execute.call(mockExecuteFunctions);

			expect(result[0]).toEqual([
				{
					json: { error: 'Error: Create error' },
					pairedItem: { item: 0 },
				},
			]);
		});

		it('should throw on fail when continueOnFail is disabled', async () => {
			mockExecuteFunctions.getNodeParameter
				.mockReturnValueOnce('add')
				.mockReturnValueOnce('/repo')
				.mockReturnValueOnce({})
				.mockReturnValueOnce('file.txt');

			mockGit.add.mockRejectedValueOnce(new Error('Add failed'));

			await expect(gitNode.execute.call(mockExecuteFunctions)).rejects.toThrow('Add failed');
		});
	});
});