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

import type { Terminal } from '@xterm/xterm';
import { deepEqual, deepStrictEqual, strictEqual } from 'assert';
import * as sinon from 'sinon';
import { importAMDNodeModule } from '../../../../../../amdX.js';
import { ensureNoDisposablesAreLeakedInTestSuite } from '../../../../../../base/test/common/utils.js';
import { NullLogService } from '../../../../../../platform/log/common/log.js';
import { ITerminalCapabilityStore, TerminalCapability } from '../../../../../../platform/terminal/common/capabilities/capabilities.js';
import { deserializeVSCodeOscMessage, serializeVSCodeOscMessage, parseKeyValueAssignment, parseMarkSequence, ShellIntegrationAddon } from '../../../../../../platform/terminal/common/xterm/shellIntegrationAddon.js';
import { writeP } from '../../../browser/terminalTestHelpers.js';

class TestShellIntegrationAddon extends ShellIntegrationAddon {
	getCommandDetectionMock(terminal: Terminal): sinon.SinonMock {
		const capability = super._createOrGetCommandDetection(terminal);
		this.capabilities.add(TerminalCapability.CommandDetection, capability);
		return sinon.mock(capability);
	}
	getCwdDectionMock(): sinon.SinonMock {
		const capability = super._createOrGetCwdDetection();
		this.capabilities.add(TerminalCapability.CwdDetection, capability);
		return sinon.mock(capability);
	}
}

suite('ShellIntegrationAddon', () => {
	const store = ensureNoDisposablesAreLeakedInTestSuite();

	let xterm: Terminal;
	let shellIntegrationAddon: TestShellIntegrationAddon;
	let capabilities: ITerminalCapabilityStore;

	setup(async () => {
		const TerminalCtor = (await importAMDNodeModule<typeof import('@xterm/xterm')>('@xterm/xterm', 'lib/xterm.js')).Terminal;
		xterm = store.add(new TerminalCtor({ allowProposedApi: true, cols: 80, rows: 30 }));
		shellIntegrationAddon = store.add(new TestShellIntegrationAddon('', true, undefined, undefined, new NullLogService()));
		xterm.loadAddon(shellIntegrationAddon);
		capabilities = shellIntegrationAddon.capabilities;
	});

	suite('cwd detection', () => {
		test('should activate capability on the cwd sequence (OSC 633 ; P ; Cwd=<cwd> ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CwdDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CwdDetection), false);
			await writeP(xterm, '\x1b]633;P;Cwd=/foo\x07');
			strictEqual(capabilities.has(TerminalCapability.CwdDetection), true);
		});

		test('should pass cwd sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCwdDectionMock();
			mock.expects('updateCwd').once().withExactArgs('/foo');
			await writeP(xterm, '\x1b]633;P;Cwd=/foo\x07');
			mock.verify();
		});

		test('detect ITerm sequence: `OSC 1337 ; CurrentDir=<Cwd> ST`', async () => {
			type TestCase = [title: string, input: string, expected: string];
			const cases: TestCase[] = [
				['root', '/', '/'],
				['non-root', '/some/path', '/some/path'],
			];
			for (const x of cases) {
				const [title, input, expected] = x;
				const mock = shellIntegrationAddon.getCwdDectionMock();
				mock.expects('updateCwd').once().withExactArgs(expected).named(title);
				await writeP(xterm, `\x1b]1337;CurrentDir=${input}\x07`);
				mock.verify();
			}
		});

		suite('detect `SetCwd` sequence: `OSC 7; scheme://cwd ST`', () => {
			test('should accept well-formatted URLs', async () => {
				type TestCase = [title: string, input: string, expected: string];
				const cases: TestCase[] = [
					// Different hostname values:
					['empty hostname, pointing root', 'file:///', '/'],
					['empty hostname', 'file:///test-root/local', '/test-root/local'],
					['non-empty hostname', 'file://some-hostname/test-root/local', '/test-root/local'],
					// URL-encoded chars:
					['URL-encoded value (1)', 'file:///test-root/%6c%6f%63%61%6c', '/test-root/local'],
					['URL-encoded value (2)', 'file:///test-root/local%22', '/test-root/local"'],
					['URL-encoded value (3)', 'file:///test-root/local"', '/test-root/local"'],
				];
				for (const x of cases) {
					const [title, input, expected] = x;
					const mock = shellIntegrationAddon.getCwdDectionMock();
					mock.expects('updateCwd').once().withExactArgs(expected).named(title);
					await writeP(xterm, `\x1b]7;${input}\x07`);
					mock.verify();
				}
			});

			test('should ignore ill-formatted URLs', async () => {
				type TestCase = [title: string, input: string];
				const cases: TestCase[] = [
					// Different hostname values:
					['no hostname, pointing root', 'file://'],
					// Non-`file` scheme values:
					['no scheme (1)', '/test-root'],
					['no scheme (2)', '//test-root'],
					['no scheme (3)', '///test-root'],
					['no scheme (4)', ':///test-root'],
					['http', 'http:///test-root'],
					['ftp', 'ftp:///test-root'],
					['ssh', 'ssh:///test-root'],
				];

				for (const x of cases) {
					const [title, input] = x;
					const mock = shellIntegrationAddon.getCwdDectionMock();
					mock.expects('updateCwd').never().named(title);
					await writeP(xterm, `\x1b]7;${input}\x07`);
					mock.verify();
				}
			});
		});

		test('detect `SetWindowsFrindlyCwd` sequence: `OSC 9 ; 9 ; <cwd> ST`', async () => {
			type TestCase = [title: string, input: string, expected: string];
			const cases: TestCase[] = [
				['root', '/', '/'],
				['non-root', '/some/path', '/some/path'],
			];
			for (const x of cases) {
				const [title, input, expected] = x;
				const mock = shellIntegrationAddon.getCwdDectionMock();
				mock.expects('updateCwd').once().withExactArgs(expected).named(title);
				await writeP(xterm, `\x1b]9;9;${input}\x07`);
				mock.verify();
			}
		});
	});

	suite('command tracking', () => {
		test('should activate capability on the prompt start sequence (OSC 633 ; A ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, '\x1b]633;A\x07');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), true);
		});
		test('should pass prompt start sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('handlePromptStart').once().withExactArgs();
			await writeP(xterm, '\x1b]633;A\x07');
			mock.verify();
		});
		test('should activate capability on the command start sequence (OSC 633 ; B ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, '\x1b]633;B\x07');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), true);
		});
		test('should pass command start sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('handleCommandStart').once().withExactArgs();
			await writeP(xterm, '\x1b]633;B\x07');
			mock.verify();
		});
		test('should activate capability on the command executed sequence (OSC 633 ; C ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, '\x1b]633;C\x07');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), true);
		});
		test('should pass command executed sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('handleCommandExecuted').once().withExactArgs();
			await writeP(xterm, '\x1b]633;C\x07');
			mock.verify();
		});
		test('should activate capability on the command finished sequence (OSC 633 ; D ; <ExitCode> ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, '\x1b]633;D;7\x07');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), true);
		});
		test('should pass command finished sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('handleCommandFinished').once().withExactArgs(7);
			await writeP(xterm, '\x1b]633;D;7\x07');
			mock.verify();
		});
		test('should pass command line sequence to the capability', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('setCommandLine').once().withExactArgs('', false);
			await writeP(xterm, '\x1b]633;E\x07');
			mock.verify();

			const mock2 = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock2.expects('setCommandLine').twice().withExactArgs('cmd', false);
			await writeP(xterm, '\x1b]633;E;cmd\x07');
			await writeP(xterm, '\x1b]633;E;cmd;invalid-nonce\x07');
			mock2.verify();
		});
		test('should not activate capability on the cwd sequence (OSC 633 ; P=Cwd=<cwd> ST)', async () => {
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
			await writeP(xterm, '\x1b]633;P;Cwd=/foo\x07');
			strictEqual(capabilities.has(TerminalCapability.CommandDetection), false);
		});
		test('should pass cwd sequence to the capability if it\'s initialized', async () => {
			const mock = shellIntegrationAddon.getCommandDetectionMock(xterm);
			mock.expects('setCwd').once().withExactArgs('/foo');
			await writeP(xterm, '\x1b]633;P;Cwd=/foo\x07');
			mock.verify();
		});
	});
	suite('BufferMarkCapability', () => {
		test('SetMark', async () => {
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, '\x1b]633;SetMark;\x07');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), true);
		});
		test('SetMark - ID', async () => {
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, '\x1b]633;SetMark;1;\x07');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), true);
		});
		test('SetMark - hidden', async () => {
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, '\x1b]633;SetMark;;Hidden\x07');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), true);
		});
		test('SetMark - hidden & ID', async () => {
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, 'foo');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), false);
			await writeP(xterm, '\x1b]633;SetMark;1;Hidden\x07');
			strictEqual(capabilities.has(TerminalCapability.BufferMarkDetection), true);
		});
		suite('parseMarkSequence', () => {
			test('basic', async () => {
				deepEqual(parseMarkSequence(['', '']), { id: undefined, hidden: false });
			});
			test('ID', async () => {
				deepEqual(parseMarkSequence(['Id=3', '']), { id: '3', hidden: false });
			});
			test('hidden', async () => {
				deepEqual(parseMarkSequence(['', 'Hidden']), { id: undefined, hidden: true });
			});
			test('ID + hidden', async () => {
				deepEqual(parseMarkSequence(['Id=4555', 'Hidden']), { id: '4555', hidden: true });
			});
		});
	});

	suite('deserializeMessage', () => {
		// A single literal backslash, in order to avoid confusion about whether we are escaping test data or testing escapes.
		const Backslash = '\\' as const;
		const Newline = '\n' as const;
		const Semicolon = ';' as const;

		type TestCase = [title: string, input: string, expected: string];
		const cases: TestCase[] = [
			['empty', '', ''],
			['basic', 'value', 'value'],
			['space', 'some thing', 'some thing'],
			['escaped backslash', `${Backslash}${Backslash}`, Backslash],
			['non-initial escaped backslash', `foo${Backslash}${Backslash}`, `foo${Backslash}`],
			['two escaped backslashes', `${Backslash}${Backslash}${Backslash}${Backslash}`, `${Backslash}${Backslash}`],
			['escaped backslash amidst text', `Hello${Backslash}${Backslash}there`, `Hello${Backslash}there`],
			['backslash escaped literally and as hex', `${Backslash}${Backslash} is same as ${Backslash}x5c`, `${Backslash} is same as ${Backslash}`],
			['escaped semicolon', `${Backslash}x3b`, Semicolon],
			['non-initial escaped semicolon', `foo${Backslash}x3b`, `foo${Semicolon}`],
			['escaped semicolon (upper hex)', `${Backslash}x3B`, Semicolon],
			['escaped backslash followed by literal "x3b" is not a semicolon', `${Backslash}${Backslash}x3b`, `${Backslash}x3b`],
			['non-initial escaped backslash followed by literal "x3b" is not a semicolon', `foo${Backslash}${Backslash}x3b`, `foo${Backslash}x3b`],
			['escaped backslash followed by escaped semicolon', `${Backslash}${Backslash}${Backslash}x3b`, `${Backslash}${Semicolon}`],
			['escaped semicolon amidst text', `some${Backslash}x3bthing`, `some${Semicolon}thing`],
			['escaped newline', `${Backslash}x0a`, Newline],
			['non-initial escaped newline', `foo${Backslash}x0a`, `foo${Newline}`],
			['escaped newline (upper hex)', `${Backslash}x0A`, Newline],
			['escaped backslash followed by literal "x0a" is not a newline', `${Backslash}${Backslash}x0a`, `${Backslash}x0a`],
			['non-initial escaped backslash followed by literal "x0a" is not a newline', `foo${Backslash}${Backslash}x0a`, `foo${Backslash}x0a`],
			['PS1 simple', '[\\u@\\h \\W]\\$', '[\\u@\\h \\W]\\$'],
			['PS1 VSC SI', `${Backslash}x1b]633;A${Backslash}x07\\[${Backslash}x1b]0;\\u@\\h:\\w\\a\\]${Backslash}x1b]633;B${Backslash}x07`, '\x1b]633;A\x07\\[\x1b]0;\\u@\\h:\\w\\a\\]\x1b]633;B\x07']
		];

		cases.forEach(([title, input, expected]) => {
			test(title, () => strictEqual(deserializeVSCodeOscMessage(input), expected));
		});
	});

	suite('serializeVSCodeOscMessage', () => {
		// A single literal backslash, in order to avoid confusion about whether we are escaping test data or testing escapes.
		const Backslash = '\\' as const;
		const Newline = '\n' as const;
		const Semicolon = ';' as const;

		type TestCase = [title: string, input: string, expected: string];
		const cases: TestCase[] = [
			['empty', '', ''],
			['basic', 'value', 'value'],
			['space', 'some thing', `some${Backslash}x20thing`],
			['backslash', Backslash, `${Backslash}${Backslash}`],
			['non-initial backslash', `foo${Backslash}`, `foo${Backslash}${Backslash}`],
			['two backslashes', `${Backslash}${Backslash}`, `${Backslash}${Backslash}${Backslash}${Backslash}`],
			['backslash amidst text', `Hello${Backslash}there`, `Hello${Backslash}${Backslash}there`],
			['semicolon', Semicolon, `${Backslash}x3b`],
			['non-initial semicolon', `foo${Semicolon}`, `foo${Backslash}x3b`],
			['semicolon amidst text', `some${Semicolon}thing`, `some${Backslash}x3bthing`],
			['newline', Newline, `${Backslash}x0a`],
			['non-initial newline', `foo${Newline}`, `foo${Backslash}x0a`],
			['newline amidst text', `some${Newline}thing`, `some${Backslash}x0athing`],
			['tab character', '\t', `${Backslash}x09`],
			['carriage return', '\r', `${Backslash}x0d`],
			['null character', '\x00', `${Backslash}x00`],
			['space character (0x20)', ' ', `${Backslash}x20`],
			['character above 0x20', '!', '!'],
			['multiple special chars', `hello${Newline}world${Semicolon}test${Backslash}end`, `hello${Backslash}x0aworld${Backslash}x3btest${Backslash}${Backslash}end`],
			['PS1 with escape sequences', `\x1b]633;A\x07\\[\x1b]0;\\u@\\h:\\w\\a\\]\x1b]633;B\x07`, `${Backslash}x1b]633${Backslash}x3bA${Backslash}x07${Backslash}${Backslash}[${Backslash}x1b]0${Backslash}x3b${Backslash}${Backslash}u@${Backslash}${Backslash}h:${Backslash}${Backslash}w${Backslash}${Backslash}a${Backslash}${Backslash}]${Backslash}x1b]633${Backslash}x3bB${Backslash}x07`]
		];

		cases.forEach(([title, input, expected]) => {
			test(title, () => strictEqual(serializeVSCodeOscMessage(input), expected));
		});
	});

	test('parseKeyValueAssignment', () => {
		type TestCase = [title: string, input: string, expected: [key: string, value: string | undefined]];
		const cases: TestCase[] = [
			['empty', '', ['', undefined]],
			['no "=" sign', 'some-text', ['some-text', undefined]],
			['empty value', 'key=', ['key', '']],
			['empty key', '=value', ['', 'value']],
			['normal', 'key=value', ['key', 'value']],
			['multiple "=" signs (1)', 'key==value', ['key', '=value']],
			['multiple "=" signs (2)', 'key=value===true', ['key', 'value===true']],
			['just a "="', '=', ['', '']],
			['just a "=="', '==', ['', '=']],
		];

		cases.forEach(x => {
			const [title, input, [key, value]] = x;
			deepStrictEqual(parseKeyValueAssignment(input), { key, value }, title);
		});
	});
});
