import * as child_process from 'child_process';

import { ConfigurationTarget, window, workspace } from 'vscode';

import { RegistryImplementation } from '../common/registry';

import { Is_64Bit, IS_WINDOWS } from '../common/utils';

import { WorkspacePythonPath } from './contracts';

import { CondaEnvService } from './locators/services/condaEnvService';

import { WindowsRegistryService } from './locators/services/windowsRegistryService';

export function getFirstNonEmptyLineFromMultilineString(stdout: string) {

if (!stdout) {

return '';

}

const lines = stdout.split(/\r?\n/g).map(line => line.trim()).filter(line => line.length > 0);

return lines.length > 0 ? lines[0] : '';

}

export function getActiveWorkspaceUri(): WorkspacePythonPath | undefined {

if (!Array.isArray(workspace.workspaceFolders) || workspace.workspaceFolders.length === 0) {

return undefined;

}

if (workspace.workspaceFolders.length === 1) {

return { folderUri: workspace.workspaceFolders[0].uri, configTarget: ConfigurationTarget.Workspace };

}

if (window.activeTextEditor) {

const workspaceFolder = workspace.getWorkspaceFolder(window.activeTextEditor.document.uri);

if (workspaceFolder) {

return { configTarget: ConfigurationTarget.WorkspaceFolder, folderUri: workspaceFolder.uri };

}

}

return undefined;

}

export async function getCondaVersion() {

let condaService: CondaEnvService;

if (IS_WINDOWS) {

const windowsRegistryProvider = new WindowsRegistryService(new RegistryImplementation(), Is_64Bit);

condaService = new CondaEnvService(windowsRegistryProvider);

} else {

condaService = new CondaEnvService();

}

return condaService.getCondaFile()

.then(async condaFile => {

return new Promise<string>((resolve, reject) => {

child_process.execFile(condaFile, ['--version'], (_, stdout) => {

if (stdout && stdout.length > 0) {

resolve(getFirstNonEmptyLineFromMultilineString(stdout));

} else {

reject();

}

});

});

});

}