/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the Source EULA. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import * as nbformat from '@jupyterlab/nbformat';
import * as assert from 'assert';
import * as vscode from 'vscode';
import { jupyterCellOutputToCellOutput, jupyterNotebookModelToNotebookData } from '../deserializers';

function deepStripProperties(obj: any, props: string[]) {
	for (let prop in obj) {
		if (obj[prop]) {
			delete obj[prop];
		} else if (typeof obj[prop] === 'object') {
			deepStripProperties(obj[prop], props);
		}
	}
}

suite('ipynb serializer', () => {
	const base64EncodedImage =
		'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mOUlZL6DwAB/wFSU1jVmgAAAABJRU5ErkJggg==';
	test('Deserialize', async () => {
		const cells: nbformat.ICell[] = [
			{
				cell_type: 'code',
				execution_count: 10,
				outputs: [],
				source: 'print(1)',
				metadata: {}
			},
			{
				cell_type: 'markdown',
				source: '# HEAD',
				metadata: {}
			}
		];
		const notebook = jupyterNotebookModelToNotebookData({ cells }, 'python');
		assert.ok(notebook);

		const expectedCodeCell = new vscode.NotebookCellData(vscode.NotebookCellKind.Code, 'print(1)', 'python');
		expectedCodeCell.outputs = [];
		expectedCodeCell.metadata = { custom: { metadata: {} } };
		expectedCodeCell.executionSummary = { executionOrder: 10 };

		const expectedMarkdownCell = new vscode.NotebookCellData(vscode.NotebookCellKind.Markup, '# HEAD', 'markdown');
		expectedMarkdownCell.outputs = [];
		expectedMarkdownCell.metadata = {
			custom: { metadata: {} }
		};

		assert.deepStrictEqual(notebook.cells, [expectedCodeCell, expectedMarkdownCell]);
	});
	suite('Outputs', () => {
		function validateCellOutputTranslation(
			outputs: nbformat.IOutput[],
			expectedOutputs: vscode.NotebookCellOutput[],
			propertiesToExcludeFromComparison: string[] = []
		) {
			const cells: nbformat.ICell[] = [
				{
					cell_type: 'code',
					execution_count: 10,
					outputs,
					source: 'print(1)',
					metadata: {}
				}
			];
			const notebook = jupyterNotebookModelToNotebookData({ cells }, 'python');

			// OutputItems contain an `id` property generated by VSC.
			// Exclude that property when comparing.
			const propertiesToExclude = propertiesToExcludeFromComparison.concat(['id']);
			const actualOuts = notebook.cells[0].outputs;
			deepStripProperties(actualOuts, propertiesToExclude);
			deepStripProperties(expectedOutputs, propertiesToExclude);
			assert.deepStrictEqual(actualOuts, expectedOutputs);
		}

		test('Empty output', () => {
			validateCellOutputTranslation([], []);
		});

		test('Stream output', () => {
			validateCellOutputTranslation(
				[
					{
						output_type: 'stream',
						name: 'stderr',
						text: 'Error'
					},
					{
						output_type: 'stream',
						name: 'stdout',
						text: 'NoError'
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stderr('Error')], {
						outputType: 'stream'
					}),
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stdout('NoError')], {
						outputType: 'stream'
					})
				]
			);
		});
		test('Stream output and line endings', () => {
			validateCellOutputTranslation(
				[
					{
						output_type: 'stream',
						name: 'stdout',
						text: [
							'Line1\n',
							'\n',
							'Line3\n',
							'Line4'
						]
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stdout('Line1\n\nLine3\nLine4')], {
						outputType: 'stream'
					})
				]
			);
			validateCellOutputTranslation(
				[
					{
						output_type: 'stream',
						name: 'stdout',
						text: [
							'Hello\n',
							'Hello\n',
							'Hello\n',
							'Hello\n',
							'Hello\n',
							'Hello\n'
						]
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stdout('Hello\nHello\nHello\nHello\nHello\nHello\n')], {
						outputType: 'stream'
					})
				]
			);
		});
		test('Multi-line Stream output', () => {
			validateCellOutputTranslation(
				[
					{
						name: 'stdout',
						output_type: 'stream',
						text: [
							'Epoch 1/5\n',
							'...\n',
							'Epoch 2/5\n',
							'...\n',
							'Epoch 3/5\n',
							'...\n',
							'Epoch 4/5\n',
							'...\n',
							'Epoch 5/5\n',
							'...\n'
						]
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stdout(['Epoch 1/5\n',
						'...\n',
						'Epoch 2/5\n',
						'...\n',
						'Epoch 3/5\n',
						'...\n',
						'Epoch 4/5\n',
						'...\n',
						'Epoch 5/5\n',
						'...\n'].join(''))], {
						outputType: 'stream'
					})
				]
			);
		});

		test('Multi-line Stream output (last empty line should not be saved in ipynb)', () => {
			validateCellOutputTranslation(
				[
					{
						name: 'stderr',
						output_type: 'stream',
						text: [
							'Epoch 1/5\n',
							'...\n',
							'Epoch 2/5\n',
							'...\n',
							'Epoch 3/5\n',
							'...\n',
							'Epoch 4/5\n',
							'...\n',
							'Epoch 5/5\n',
							'...\n'
						]
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stderr(['Epoch 1/5\n',
						'...\n',
						'Epoch 2/5\n',
						'...\n',
						'Epoch 3/5\n',
						'...\n',
						'Epoch 4/5\n',
						'...\n',
						'Epoch 5/5\n',
						'...\n',
						// This last empty line should not be saved in ipynb.
						'\n'].join(''))], {
						outputType: 'stream'
					})
				]
			);
		});

		test('Streamed text with Ansi characters', async () => {
			validateCellOutputTranslation(
				[
					{
						name: 'stderr',
						text: '\u001b[K\u001b[33m✅ \u001b[0m Loading\n',
						output_type: 'stream'
					}
				],
				[
					new vscode.NotebookCellOutput(
						[vscode.NotebookCellOutputItem.stderr('\u001b[K\u001b[33m✅ \u001b[0m Loading\n')],
						{
							outputType: 'stream'
						}
					)
				]
			);
		});

		test('Streamed text with angle bracket characters', async () => {
			validateCellOutputTranslation(
				[
					{
						name: 'stderr',
						text: '1 is < 2',
						output_type: 'stream'
					}
				],
				[
					new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.stderr('1 is < 2')], {
						outputType: 'stream'
					})
				]
			);
		});

		test('Streamed text with angle bracket characters and ansi chars', async () => {
			validateCellOutputTranslation(
				[
					{
						name: 'stderr',
						text: '1 is < 2\u001b[K\u001b[33m✅ \u001b[0m Loading\n',
						output_type: 'stream'
					}
				],
				[
					new vscode.NotebookCellOutput(
						[vscode.NotebookCellOutputItem.stderr('1 is < 2\u001b[K\u001b[33m✅ \u001b[0m Loading\n')],
						{
							outputType: 'stream'
						}
					)
				]
			);
		});

		test('Error', async () => {
			validateCellOutputTranslation(
				[
					{
						ename: 'Error Name',
						evalue: 'Error Value',
						traceback: ['stack1', 'stack2', 'stack3'],
						output_type: 'error'
					}
				],
				[
					new vscode.NotebookCellOutput(
						[
							vscode.NotebookCellOutputItem.error({
								name: 'Error Name',
								message: 'Error Value',
								stack: ['stack1', 'stack2', 'stack3'].join('\n')
							})
						],
						{
							outputType: 'error',
							originalError: {
								ename: 'Error Name',
								evalue: 'Error Value',
								traceback: ['stack1', 'stack2', 'stack3'],
								output_type: 'error'
							}
						}
					)
				]
			);
		});

		['display_data', 'execute_result'].forEach(output_type => {
			suite(`Rich output for output_type = ${output_type}`, () => {
				// Properties to exclude when comparing.
				let propertiesToExcludeFromComparison: string[] = [];
				setup(() => {
					if (output_type === 'display_data') {
						// With display_data the execution_count property will never exist in the output.
						// We can ignore that (as it will never exist).
						// But we leave it in the case of `output_type === 'execute_result'`
						propertiesToExcludeFromComparison = ['execution_count', 'executionCount'];
					}
				});

				test('Text mimeType output', async () => {
					validateCellOutputTranslation(
						[
							{
								data: {
									'text/plain': 'Hello World!'
								},
								output_type,
								metadata: {},
								execution_count: 1
							}
						],
						[
							new vscode.NotebookCellOutput(
								[new vscode.NotebookCellOutputItem(Buffer.from('Hello World!', 'utf8'), 'text/plain')],
								{
									outputType: output_type,
									metadata: {}, // display_data & execute_result always have metadata.
									executionCount: 1
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});

				test('png,jpeg images', async () => {
					validateCellOutputTranslation(
						[
							{
								execution_count: 1,
								data: {
									'image/png': base64EncodedImage,
									'image/jpeg': base64EncodedImage
								},
								metadata: {},
								output_type
							}
						],
						[
							new vscode.NotebookCellOutput(
								[
									new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/png'),
									new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/jpeg')
								],
								{
									executionCount: 1,
									outputType: output_type,
									metadata: {} // display_data & execute_result always have metadata.
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});

				test('png image with a light background', async () => {
					validateCellOutputTranslation(
						[
							{
								execution_count: 1,
								data: {
									'image/png': base64EncodedImage
								},
								metadata: {
									needs_background: 'light'
								},
								output_type
							}
						],
						[
							new vscode.NotebookCellOutput(
								[new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/png')],
								{
									executionCount: 1,
									metadata: {
										needs_background: 'light'
									},
									outputType: output_type
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});

				test('png image with a dark background', async () => {
					validateCellOutputTranslation(
						[
							{
								execution_count: 1,
								data: {
									'image/png': base64EncodedImage
								},
								metadata: {
									needs_background: 'dark'
								},
								output_type
							}
						],
						[
							new vscode.NotebookCellOutput(
								[new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/png')],
								{
									executionCount: 1,
									metadata: {
										needs_background: 'dark'
									},
									outputType: output_type
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});

				test('png image with custom dimensions', async () => {
					validateCellOutputTranslation(
						[
							{
								execution_count: 1,
								data: {
									'image/png': base64EncodedImage
								},
								metadata: {
									'image/png': { height: '111px', width: '999px' }
								},
								output_type
							}
						],
						[
							new vscode.NotebookCellOutput(
								[new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/png')],
								{
									executionCount: 1,
									metadata: {
										'image/png': { height: '111px', width: '999px' }
									},
									outputType: output_type
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});

				test('png allowed to scroll', async () => {
					validateCellOutputTranslation(
						[
							{
								execution_count: 1,
								data: {
									'image/png': base64EncodedImage
								},
								metadata: {
									unconfined: true,
									'image/png': { width: '999px' }
								},
								output_type
							}
						],
						[
							new vscode.NotebookCellOutput(
								[new vscode.NotebookCellOutputItem(Buffer.from(base64EncodedImage, 'base64'), 'image/png')],
								{
									executionCount: 1,
									metadata: {
										unconfined: true,
										'image/png': { width: '999px' }
									},
									outputType: output_type
								}
							)
						],
						propertiesToExcludeFromComparison
					);
				});
			});
		});
	});

	suite('Output Order', () => {
		test('Verify order of outputs', async () => {
			const dataAndExpectedOrder: { output: nbformat.IDisplayData; expectedMimeTypesOrder: string[] }[] = [
				{
					output: {
						data: {
							'application/vnd.vegalite.v4+json': 'some json',
							'text/html': '<a>Hello</a>'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['application/vnd.vegalite.v4+json', 'text/html']
				},
				{
					output: {
						data: {
							'application/vnd.vegalite.v4+json': 'some json',
							'application/javascript': 'some js',
							'text/plain': 'some text',
							'text/html': '<a>Hello</a>'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: [
						'application/vnd.vegalite.v4+json',
						'text/html',
						'application/javascript',
						'text/plain'
					]
				},
				{
					output: {
						data: {
							'application/vnd.vegalite.v4+json': '', // Empty, should give preference to other mimetypes.
							'application/javascript': 'some js',
							'text/plain': 'some text',
							'text/html': '<a>Hello</a>'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: [
						'text/html',
						'application/javascript',
						'text/plain',
						'application/vnd.vegalite.v4+json'
					]
				},
				{
					output: {
						data: {
							'text/plain': 'some text',
							'text/html': '<a>Hello</a>'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['text/html', 'text/plain']
				},
				{
					output: {
						data: {
							'application/javascript': 'some js',
							'text/plain': 'some text'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['application/javascript', 'text/plain']
				},
				{
					output: {
						data: {
							'image/svg+xml': 'some svg',
							'text/plain': 'some text'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['image/svg+xml', 'text/plain']
				},
				{
					output: {
						data: {
							'text/latex': 'some latex',
							'text/plain': 'some text'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['text/latex', 'text/plain']
				},
				{
					output: {
						data: {
							'application/vnd.jupyter.widget-view+json': 'some widget',
							'text/plain': 'some text'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['application/vnd.jupyter.widget-view+json', 'text/plain']
				},
				{
					output: {
						data: {
							'text/plain': 'some text',
							'image/svg+xml': 'some svg',
							'image/png': 'some png'
						},
						metadata: {},
						output_type: 'display_data'
					},
					expectedMimeTypesOrder: ['image/png', 'image/svg+xml', 'text/plain']
				}
			];

			dataAndExpectedOrder.forEach(({ output, expectedMimeTypesOrder }) => {
				const sortedOutputs = jupyterCellOutputToCellOutput(output);
				const mimeTypes = sortedOutputs.items.map((item) => item.mime).join(',');
				assert.equal(mimeTypes, expectedMimeTypesOrder.join(','));
			});
		});
	});
});