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

import * as assert from 'assert';
import { workspace, window, commands, ViewColumn, TextEditorViewColumnChangeEvent, Uri, Selection, Position, CancellationTokenSource, TextEditorSelectionChangeKind, QuickPickItem, TextEditor } from 'vscode';
import { join } from 'path';
import { closeAllEditors, pathEquals, createRandomFile } from '../utils';


suite('vscode API - window', () => {

	teardown(closeAllEditors);

	test('editor, active text editor', async () => {
		const doc = await workspace.openTextDocument(join(workspace.rootPath || '', './far.js'));
		await window.showTextDocument(doc);
		const active = window.activeTextEditor;
		assert.ok(active);
		assert.ok(pathEquals(active!.document.uri.fsPath, doc.uri.fsPath));
	});

	test('editor, opened via resource', () => {
		const uri = Uri.file(join(workspace.rootPath || '', './far.js'));
		return window.showTextDocument(uri).then((_editor) => {
			const active = window.activeTextEditor;
			assert.ok(active);
			assert.ok(pathEquals(active!.document.uri.fsPath, uri.fsPath));
		});
	});

	// test('editor, UN-active text editor', () => {
	// 	assert.equal(window.visibleTextEditors.length, 0);
	// 	assert.ok(window.activeTextEditor === undefined);
	// });

	test('editor, assign and check view columns', async () => {
		const doc = await workspace.openTextDocument(join(workspace.rootPath || '', './far.js'));
		let p1 = window.showTextDocument(doc, ViewColumn.One).then(editor => {
			assert.equal(editor.viewColumn, ViewColumn.One);
		});
		let p2 = window.showTextDocument(doc, ViewColumn.Two).then(editor_1 => {
			assert.equal(editor_1.viewColumn, ViewColumn.Two);
		});
		let p3 = window.showTextDocument(doc, ViewColumn.Three).then(editor_2 => {
			assert.equal(editor_2.viewColumn, ViewColumn.Three);
		});
		return Promise.all([p1, p2, p3]);
	});

	test('editor, onDidChangeVisibleTextEditors', async () => {
		let eventCounter = 0;
		let reg = window.onDidChangeVisibleTextEditors(_editor => {
			eventCounter += 1;
		});

		const doc = await workspace.openTextDocument(join(workspace.rootPath || '', './far.js'));
		await window.showTextDocument(doc, ViewColumn.One);
		assert.equal(eventCounter, 1);

		await window.showTextDocument(doc, ViewColumn.Two);
		assert.equal(eventCounter, 2);

		await window.showTextDocument(doc, ViewColumn.Three);
		assert.equal(eventCounter, 3);

		reg.dispose();
	});

	test('editor, onDidChangeTextEditorViewColumn (close editor)', () => {

		let actualEvent: TextEditorViewColumnChangeEvent;

		let registration1 = workspace.registerTextDocumentContentProvider('bikes', {
			provideTextDocumentContent() {
				return 'mountainbiking,roadcycling';
			}
		});

		return Promise.all([
			workspace.openTextDocument(Uri.parse('bikes://testing/one')).then(doc => window.showTextDocument(doc, ViewColumn.One)),
			workspace.openTextDocument(Uri.parse('bikes://testing/two')).then(doc => window.showTextDocument(doc, ViewColumn.Two))
		]).then(async editors => {

			let [one, two] = editors;

			await new Promise<void>(resolve => {
				let registration2 = window.onDidChangeTextEditorViewColumn(event => {
					actualEvent = event;
					registration2.dispose();
					resolve();
				});
				// close editor 1, wait a little for the event to bubble
				one.hide();
			});
			assert.ok(actualEvent);
			assert.ok(actualEvent.textEditor === two);
			assert.ok(actualEvent.viewColumn === two.viewColumn);

			registration1.dispose();
		});
	});

	test('editor, onDidChangeTextEditorViewColumn (move editor group)', () => {

		let actualEvents: TextEditorViewColumnChangeEvent[] = [];

		let registration1 = workspace.registerTextDocumentContentProvider('bikes', {
			provideTextDocumentContent() {
				return 'mountainbiking,roadcycling';
			}
		});

		return Promise.all([
			workspace.openTextDocument(Uri.parse('bikes://testing/one')).then(doc => window.showTextDocument(doc, ViewColumn.One)),
			workspace.openTextDocument(Uri.parse('bikes://testing/two')).then(doc => window.showTextDocument(doc, ViewColumn.Two))
		]).then(editors => {

			let [, two] = editors;
			two.show();

			return new Promise<void>(resolve => {

				let registration2 = window.onDidChangeTextEditorViewColumn(event => {
					actualEvents.push(event);

					if (actualEvents.length === 2) {
						registration2.dispose();
						resolve();
					}
				});

				// move active editor group left
				return commands.executeCommand('workbench.action.moveActiveEditorGroupLeft');

			}).then(() => {
				assert.equal(actualEvents.length, 2);

				for (const event of actualEvents) {
					assert.equal(event.viewColumn, event.textEditor.viewColumn);
				}

				registration1.dispose();
			});
		});
	});

	test('active editor not always correct... #49125', async function () {
		if (process.env['BUILD_SOURCEVERSION']) {
			this.skip();
			return;
		}
		function assertActiveEditor(editor: TextEditor) {
			if (window.activeTextEditor === editor) {
				assert.ok(true);
				return;
			}
			function printEditor(editor: TextEditor): string {
				return `doc: ${editor.document.uri.toString()}, column: ${editor.viewColumn}, active: ${editor === window.activeTextEditor}`;
			}
			const visible = window.visibleTextEditors.map(editor => printEditor(editor));
			assert.ok(false, `ACTIVE editor should be ${printEditor(editor)}, BUT HAVING ${visible.join(', ')}`);

		}

		const randomFile1 = await createRandomFile();
		const randomFile2 = await createRandomFile();

		const [docA, docB] = await Promise.all([
			workspace.openTextDocument(randomFile1),
			workspace.openTextDocument(randomFile2)
		]);
		for (let c = 0; c < 4; c++) {
			let editorA = await window.showTextDocument(docA, ViewColumn.One);
			assertActiveEditor(editorA);

			let editorB = await window.showTextDocument(docB, ViewColumn.Two);
			assertActiveEditor(editorB);
		}
	});

	test('default column when opening a file', async () => {
		const [docA, docB, docC] = await Promise.all([
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile())
		]);

		await window.showTextDocument(docA, ViewColumn.One);
		await window.showTextDocument(docB, ViewColumn.Two);

		assert.ok(window.activeTextEditor);
		assert.ok(window.activeTextEditor!.document === docB);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Two);

		const editor = await window.showTextDocument(docC);
		assert.ok(
			window.activeTextEditor === editor,
			`wanted fileName:${editor.document.fileName}/viewColumn:${editor.viewColumn} but got fileName:${window.activeTextEditor!.document.fileName}/viewColumn:${window.activeTextEditor!.viewColumn}. a:${docA.fileName}, b:${docB.fileName}, c:${docC.fileName}`
		);
		assert.ok(window.activeTextEditor!.document === docC);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Two);
	});

	test('showTextDocument ViewColumn.BESIDE', async () => {
		const [docA, docB, docC] = await Promise.all([
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile())
		]);

		await window.showTextDocument(docA, ViewColumn.One);
		await window.showTextDocument(docB, ViewColumn.Beside);

		assert.ok(window.activeTextEditor);
		assert.ok(window.activeTextEditor!.document === docB);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Two);

		await window.showTextDocument(docC, ViewColumn.Beside);

		assert.ok(window.activeTextEditor!.document === docC);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Three);
	});

	test('showTextDocument ViewColumn is always defined (even when opening > ViewColumn.Nine)', async () => {
		const [doc1, doc2, doc3, doc4, doc5, doc6, doc7, doc8, doc9, doc10] = await Promise.all([
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile())
		]);

		await window.showTextDocument(doc1, ViewColumn.One);
		await window.showTextDocument(doc2, ViewColumn.Two);
		await window.showTextDocument(doc3, ViewColumn.Three);
		await window.showTextDocument(doc4, ViewColumn.Four);
		await window.showTextDocument(doc5, ViewColumn.Five);
		await window.showTextDocument(doc6, ViewColumn.Six);
		await window.showTextDocument(doc7, ViewColumn.Seven);
		await window.showTextDocument(doc8, ViewColumn.Eight);
		await window.showTextDocument(doc9, ViewColumn.Nine);
		await window.showTextDocument(doc10, ViewColumn.Beside);

		assert.ok(window.activeTextEditor);
		assert.ok(window.activeTextEditor!.document === doc10);
		assert.equal(window.activeTextEditor!.viewColumn, 10);
	});

	test('issue #27408 - showTextDocument & vscode.diff always default to ViewColumn.One', async () => {
		const [docA, docB, docC] = await Promise.all([
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile()),
			workspace.openTextDocument(await createRandomFile())
		]);

		await window.showTextDocument(docA, ViewColumn.One);
		await window.showTextDocument(docB, ViewColumn.Two);

		assert.ok(window.activeTextEditor);
		assert.ok(window.activeTextEditor!.document === docB);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Two);

		await window.showTextDocument(docC, ViewColumn.Active);

		assert.ok(window.activeTextEditor!.document === docC);
		assert.equal(window.activeTextEditor!.viewColumn, ViewColumn.Two);
	});

	test('issue #5362 - Incorrect TextEditor passed by onDidChangeTextEditorSelection', (done) => {
		const file10Path = join(workspace.rootPath || '', './10linefile.ts');
		const file30Path = join(workspace.rootPath || '', './30linefile.ts');

		let finished = false;
		let failOncePlease = (err: Error) => {
			if (finished) {
				return;
			}
			finished = true;
			done(err);
		};

		let passOncePlease = () => {
			if (finished) {
				return;
			}
			finished = true;
			done(null);
		};

		let subscription = window.onDidChangeTextEditorSelection((e) => {
			let lineCount = e.textEditor.document.lineCount;
			let pos1 = e.textEditor.selections[0].active.line;
			let pos2 = e.selections[0].active.line;

			if (pos1 !== pos2) {
				failOncePlease(new Error('received invalid selection changed event!'));
				return;
			}

			if (pos1 >= lineCount) {
				failOncePlease(new Error(`Cursor position (${pos1}) is not valid in the document ${e.textEditor.document.fileName} that has ${lineCount} lines.`));
				return;
			}
		});

		// Open 10 line file, show it in slot 1, set cursor to line 10
		// Open 30 line file, show it in slot 1, set cursor to line 30
		// Open 10 line file, show it in slot 1
		// Open 30 line file, show it in slot 1
		workspace.openTextDocument(file10Path).then((doc) => {
			return window.showTextDocument(doc, ViewColumn.One);
		}).then((editor10line) => {
			editor10line.selection = new Selection(new Position(9, 0), new Position(9, 0));
		}).then(() => {
			return workspace.openTextDocument(file30Path);
		}).then((doc) => {
			return window.showTextDocument(doc, ViewColumn.One);
		}).then((editor30line) => {
			editor30line.selection = new Selection(new Position(29, 0), new Position(29, 0));
		}).then(() => {
			return workspace.openTextDocument(file10Path);
		}).then((doc) => {
			return window.showTextDocument(doc, ViewColumn.One);
		}).then(() => {
			return workspace.openTextDocument(file30Path);
		}).then((doc) => {
			return window.showTextDocument(doc, ViewColumn.One);
		}).then(() => {
			subscription.dispose();
		}).then(passOncePlease, failOncePlease);
	});

	test('#7013 - input without options', function () {
		const source = new CancellationTokenSource();
		let p = window.showInputBox(undefined, source.token);
		assert.ok(typeof p === 'object');
		source.dispose();
	});

	test('showInputBox - undefined on cancel', async function () {
		const source = new CancellationTokenSource();
		const p = window.showInputBox(undefined, source.token);
		source.cancel();
		const value = await p;
		assert.equal(value, undefined);
	});

	test('showInputBox - cancel early', async function () {
		const source = new CancellationTokenSource();
		source.cancel();
		const p = window.showInputBox(undefined, source.token);
		const value = await p;
		assert.equal(value, undefined);
	});

	test('showInputBox - \'\' on Enter', function () {
		const p = window.showInputBox();
		return Promise.all<any>([
			commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem'),
			p.then(value => assert.equal(value, ''))
		]);
	});

	test('showInputBox - default value on Enter', function () {
		const p = window.showInputBox({ value: 'farboo' });
		return Promise.all<any>([
			p.then(value => assert.equal(value, 'farboo')),
			commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem'),
		]);
	});

	test('showInputBox - `undefined` on Esc', function () {
		const p = window.showInputBox();
		return Promise.all<any>([
			commands.executeCommand('workbench.action.closeQuickOpen'),
			p.then(value => assert.equal(value, undefined))
		]);
	});

	test('showInputBox - `undefined` on Esc (despite default)', function () {
		const p = window.showInputBox({ value: 'farboo' });
		return Promise.all<any>([
			commands.executeCommand('workbench.action.closeQuickOpen'),
			p.then(value => assert.equal(value, undefined))
		]);
	});

	test('showInputBox - value not empty on second try', async function () {
		const one = window.showInputBox({ value: 'notempty' });
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		assert.equal(await one, 'notempty');
		const two = window.showInputBox({ value: 'notempty' });
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		assert.equal(await two, 'notempty');
	});

	test('showQuickPick, accept first', async function () {
		const tracker = createQuickPickTracker<string>();
		const first = tracker.nextItem();
		const pick = window.showQuickPick(['eins', 'zwei', 'drei'], {
			onDidSelectItem: tracker.onDidSelectItem
		});
		assert.equal(await first, 'eins');
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		assert.equal(await pick, 'eins');
		return tracker.done();
	});

	test('showQuickPick, accept second', async function () {
		const tracker = createQuickPickTracker<string>();
		const first = tracker.nextItem();
		const pick = window.showQuickPick(['eins', 'zwei', 'drei'], {
			onDidSelectItem: tracker.onDidSelectItem
		});
		assert.equal(await first, 'eins');
		const second = tracker.nextItem();
		await commands.executeCommand('workbench.action.quickOpenSelectNext');
		assert.equal(await second, 'zwei');
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		assert.equal(await pick, 'zwei');
		return tracker.done();
	});

	test('showQuickPick, select first two', async function () {
		const label = 'showQuickPick, select first two';
		let i = 0;
		const resolves: ((value: string) => void)[] = [];
		let done: () => void;
		const unexpected = new Promise<void>((resolve, reject) => {
			done = () => resolve();
			resolves.push(reject);
		});
		const picks = window.showQuickPick(['eins', 'zwei', 'drei'], {
			onDidSelectItem: item => resolves.pop()!(item as string),
			canPickMany: true
		});
		const first = new Promise(resolve => resolves.push(resolve));
		console.log(`${label}: ${++i}`);
		await new Promise(resolve => setTimeout(resolve, 100)); // Allow UI to update.
		console.log(`${label}: ${++i}`);
		await commands.executeCommand('workbench.action.quickOpenSelectNext');
		console.log(`${label}: ${++i}`);
		assert.equal(await first, 'eins');
		console.log(`${label}: ${++i}`);
		await commands.executeCommand('workbench.action.quickPickManyToggle');
		console.log(`${label}: ${++i}`);
		const second = new Promise(resolve => resolves.push(resolve));
		await commands.executeCommand('workbench.action.quickOpenSelectNext');
		console.log(`${label}: ${++i}`);
		assert.equal(await second, 'zwei');
		console.log(`${label}: ${++i}`);
		await commands.executeCommand('workbench.action.quickPickManyToggle');
		console.log(`${label}: ${++i}`);
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		console.log(`${label}: ${++i}`);
		assert.deepStrictEqual(await picks, ['eins', 'zwei']);
		console.log(`${label}: ${++i}`);
		done!();
		return unexpected;
	});

	test('showQuickPick, keep selection (microsoft/vscode-azure-account#67)', async function () {
		const picks = window.showQuickPick([
			{ label: 'eins' },
			{ label: 'zwei', picked: true },
			{ label: 'drei', picked: true }
		], {
			canPickMany: true
		});
		await new Promise<void>(resolve => setTimeout(() => resolve(), 100));
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		if (await Promise.race([picks, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 100))]) === false) {
			await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
			if (await Promise.race([picks, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 1000))]) === false) {
				await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
				if (await Promise.race([picks, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 1000))]) === false) {
					assert.ok(false, 'Picks not resolved!');
				}
			}
		}
		assert.deepStrictEqual((await picks)!.map(pick => pick.label), ['zwei', 'drei']);
	});

	test('showQuickPick, undefined on cancel', function () {
		const source = new CancellationTokenSource();
		const p = window.showQuickPick(['eins', 'zwei', 'drei'], undefined, source.token);
		source.cancel();
		return p.then(value => {
			assert.equal(value, undefined);
		});
	});

	test('showQuickPick, cancel early', function () {
		const source = new CancellationTokenSource();
		source.cancel();
		const p = window.showQuickPick(['eins', 'zwei', 'drei'], undefined, source.token);
		return p.then(value => {
			assert.equal(value, undefined);
		});
	});

	test('showQuickPick, canceled by another picker', function () {

		const source = new CancellationTokenSource();

		const result = window.showQuickPick(['eins', 'zwei', 'drei'], { ignoreFocusOut: true }).then(result => {
			source.cancel();
			assert.equal(result, undefined);
		});

		window.showQuickPick(['eins', 'zwei', 'drei'], undefined, source.token);

		return result;
	});

	test('showQuickPick, canceled by input', function () {

		const result = window.showQuickPick(['eins', 'zwei', 'drei'], { ignoreFocusOut: true }).then(result => {
			assert.equal(result, undefined);
		});

		const source = new CancellationTokenSource();
		window.showInputBox(undefined, source.token);
		source.cancel();

		return result;
	});

	test('showQuickPick, native promise - #11754', async function () {

		const data = new Promise<string[]>(resolve => {
			resolve(['a', 'b', 'c']);
		});

		const source = new CancellationTokenSource();
		const result = window.showQuickPick(data, undefined, source.token);
		source.cancel();
		const value_1 = await result;
		assert.equal(value_1, undefined);
	});

	test('showQuickPick, never resolve promise and cancel - #22453', function () {

		const result = window.showQuickPick(new Promise<string[]>(_resolve => { }));

		const a = result.then(value => {
			assert.equal(value, undefined);
		});
		const b = commands.executeCommand('workbench.action.closeQuickOpen');
		return Promise.all([a, b]);
	});

	test('showWorkspaceFolderPick', async function () {
		const p = window.showWorkspaceFolderPick(undefined);

		await new Promise(resolve => setTimeout(resolve, 10));
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		const r1 = await Promise.race([p, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 100))]);
		if (r1 !== false) {
			return;
		}
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		const r2 = await Promise.race([p, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 1000))]);
		if (r2 !== false) {
			return;
		}
		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		const r3 = await Promise.race([p, new Promise<boolean>(resolve => setTimeout(() => resolve(false), 1000))]);
		assert.ok(r3 !== false);
	});

	test('Default value for showInput Box not accepted when it fails validateInput, reversing #33691', async function () {
		const result = window.showInputBox({
			validateInput: (value: string) => {
				if (!value || value.trim().length === 0) {
					return 'Cannot set empty description';
				}
				return null;
			}
		});

		await commands.executeCommand('workbench.action.acceptSelectedQuickOpenItem');
		await commands.executeCommand('workbench.action.closeQuickOpen');
		assert.equal(await result, undefined);
	});

	function createQuickPickTracker<T extends string | QuickPickItem>() {
		const resolves: ((value: T) => void)[] = [];
		let done: () => void;
		const unexpected = new Promise<void>((resolve, reject) => {
			done = () => resolve();
			resolves.push(reject);
		});
		return {
			onDidSelectItem: (item: T) => resolves.pop()!(item),
			nextItem: () => new Promise<T>(resolve => resolves.push(resolve)),
			done: () => {
				done!();
				return unexpected;
			},
		};
	}


	test('editor, selection change kind', () => {
		return workspace.openTextDocument(join(workspace.rootPath || '', './far.js')).then(doc => window.showTextDocument(doc)).then(editor => {


			return new Promise<void>((resolve, _reject) => {

				let subscription = window.onDidChangeTextEditorSelection(e => {
					assert.ok(e.textEditor === editor);
					assert.equal(e.kind, TextEditorSelectionChangeKind.Command);

					subscription.dispose();
					resolve();
				});

				editor.selection = new Selection(editor.selection.anchor, editor.selection.active.translate(2));
			});

		});
	});
});