import { inject, injectable } from 'inversify';

import * as path from 'path';

import { IPathUtils, IsWindows } from '../types';

import { NON_WINDOWS_PATH_VARIABLE_NAME, WINDOWS_PATH_VARIABLE_NAME } from './constants';

// tslint:disable-next-line:no-var-requires no-require-imports

const untildify = require('untildify');

@injectable()

export class PathUtils implements IPathUtils {

public readonly home = '';

constructor(@inject(IsWindows) private isWindows: boolean) {

this.home = untildify('~');

}

public get delimiter(): string {

return path.delimiter;

}

public get separator(): string {

return path.sep;

}

// TO DO: Deprecate in favor of IPlatformService

public getPathVariableName() {

return this.isWindows ? WINDOWS_PATH_VARIABLE_NAME : NON_WINDOWS_PATH_VARIABLE_NAME;

}

public basename(pathValue: string, ext?: string): string {

return path.basename(pathValue, ext);

}

public getDisplayName(pathValue: string, cwd?: string): string {

if (cwd && pathValue.startsWith(cwd)) {

return `.${path.sep}${path.relative(cwd, pathValue)}`;

} else if (pathValue.startsWith(this.home)) {

return `~${path.sep}${path.relative(this.home, pathValue)}`;

} else {

return pathValue;

}

}

}