/**
 * Copyright (c) 2017, Daniel Imms (MIT License).
 * Copyright (c) 2018, Microsoft Corporation (MIT License).
 */

import * as assert from 'assert';
import { argsToCommandLine } from './windowsPtyAgent';

function check(file: string, args: string | string[], expected: string): void {
  assert.equal(argsToCommandLine(file, args), expected);
}

if (process.platform === 'win32') {
  describe('argsToCommandLine', () => {
    describe('Plain strings', () => {
      it('doesn\'t quote plain string', () => {
        check('asdf', [], 'asdf');
      });
      it('doesn\'t escape backslashes', () => {
        check('\\asdf\\qwer\\', [], '\\asdf\\qwer\\');
      });
      it('doesn\'t escape multiple backslashes', () => {
        check('asdf\\\\qwer', [], 'asdf\\\\qwer');
      });
      it('adds backslashes before quotes', () => {
        check('"asdf"qwer"', [], '\\"asdf\\"qwer\\"');
      });
      it('escapes backslashes before quotes', () => {
        check('asdf\\"qwer', [], 'asdf\\\\\\"qwer');
      });
    });

    describe('Quoted strings', () => {
      it('quotes string with spaces', () => {
        check('asdf qwer', [], '"asdf qwer"');
      });
      it('quotes empty string', () => {
        check('', [], '""');
      });
      it('quotes string with tabs', () => {
        check('asdf\tqwer', [], '"asdf\tqwer"');
      });
      it('escapes only the last backslash', () => {
        check('\\asdf \\qwer\\', [], '"\\asdf \\qwer\\\\"');
      });
      it('doesn\'t escape multiple backslashes', () => {
        check('asdf \\\\qwer', [], '"asdf \\\\qwer"');
      });
      it('escapes backslashes before quotes', () => {
        check('asdf \\"qwer', [], '"asdf \\\\\\"qwer"');
      });
      it('escapes multiple backslashes at the end', () => {
        check('asdf qwer\\\\', [], '"asdf qwer\\\\\\\\"');
      });
    });

    describe('Multiple arguments', () => {
      it('joins arguments with spaces', () => {
        check('asdf', ['qwer zxcv', '', '"'], 'asdf "qwer zxcv" "" \\"');
      });
      it('array argument all in quotes', () => {
        check('asdf', ['"surounded by quotes"'], 'asdf \\"surounded by quotes\\"');
      });
      it('array argument quotes in the middle', () => {
        check('asdf', ['quotes "in the" middle'], 'asdf "quotes \\"in the\\" middle"');
      });
      it('array argument quotes near start', () => {
        check('asdf', ['"quotes" near start'], 'asdf "\\"quotes\\" near start"');
      });
      it('array argument quotes near end', () => {
        check('asdf', ['quotes "near end"'], 'asdf "quotes \\"near end\\""');
      });
    });

    describe('Args as CommandLine', () => {
      it('should handle empty string', () => {
        check('file', '', 'file');
      });
      it('should not change args', () => {
        check('file', 'foo bar baz', 'file foo bar baz');
        check('file', 'foo \\ba"r \baz', 'file foo \\ba"r \baz');
      });
    });

    describe('Real-world cases', () => {
      it('quotes within quotes', () => {
        check('cmd.exe', ['/c', 'powershell -noexit -command \'Set-location \"C:\\user\"\''], 'cmd.exe /c "powershell -noexit -command \'Set-location \\\"C:\\user\\"\'"');
      });
      it('space within quotes', () => {
        check('cmd.exe', ['/k', '"C:\\Users\\alros\\Desktop\\test script.bat"'], 'cmd.exe /k \\"C:\\Users\\alros\\Desktop\\test script.bat\\"');
      });
    });
  });
}