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/* --------------------------------------------------------------------------------------------

* Copyright (c) Microsoft Corporation. All Rights Reserved.

* See 'LICENSE' in the project root for license information.

* ------------------------------------------------------------------------------------------ */

import { execChildProcess } from '../common';

import { PsProcessParser } from './nativeAttach';

import { AttachItem, showQuickPick } from './attachQuickPick';

import * as debugUtils from './utils';

import * as fs from 'fs';

import * as os from 'os';

import * as path from 'path';

import * as util from '../common';

import * as vscode from 'vscode';

export interface AttachItemsProvider {

getAttachItems(): Promise<AttachItem[]>;

}

export class AttachPicker {

constructor(private attachItemsProvider: AttachItemsProvider) { }

public ShowAttachEntries(): Promise<string> {

return util.isExtensionReady().then(ready => {

if (!ready) {

util.displayExtensionNotReadyPrompt();

} else {

return showQuickPick(() => this.attachItemsProvider.getAttachItems());

}

});

}

}

export class RemoteAttachPicker {

constructor() {

this._channel = vscode.window.createOutputChannel('remote-attach');

}

private _channel: vscode.OutputChannel = null;

public ShowAttachEntries(config: any): Promise<string> {

return util.isExtensionReady().then(ready => {

if (!ready) {

util.displayExtensionNotReadyPrompt();

} else {

this._channel.clear();

let pipeTransport: any = config ? config.pipeTransport : null;

if (pipeTransport === null) {

return Promise.reject<string>(new Error("Chosen debug configuration does not contain pipeTransport"));

}

let pipeProgram: string = null;

if (os.platform() === 'win32' &&

pipeTransport.pipeProgram &&

!fs.existsSync(pipeTransport.pipeProgram)) {

const pipeProgramStr: string = pipeTransport.pipeProgram.toLowerCase().trim();

const expectedArch: debugUtils.ArchType = debugUtils.ArchType[process.arch];

// Check for pipeProgram

if (!fs.existsSync(config.pipeTransport.pipeProgram)) {

pipeProgram = debugUtils.ArchitectureReplacer.checkAndReplaceWSLPipeProgram(pipeProgramStr, expectedArch);

}

// If pipeProgram does not get replaced and there is a pipeCwd, concatenate with pipeProgramStr and attempt to replace.

if (!pipeProgram && config.pipeTransport.pipeCwd) {

const pipeCwdStr: string = config.pipeTransport.pipeCwd.toLowerCase().trim();

const newPipeProgramStr: string = path.join(pipeCwdStr, pipeProgramStr);

if (!fs.existsSync(newPipeProgramStr)) {

pipeProgram = debugUtils.ArchitectureReplacer.checkAndReplaceWSLPipeProgram(newPipeProgramStr, expectedArch);

}

}

}

if (!pipeProgram) {

pipeProgram = pipeTransport.pipeProgram;

}

let pipeArgs: string[] = pipeTransport.pipeArgs;

let argList: string = RemoteAttachPicker.createArgumentList(pipeArgs);

let pipeCmd: string = `"${pipeProgram}" ${argList}`;

return this.getRemoteOSAndProcesses(pipeCmd)

.then(processes => {

let attachPickOptions: vscode.QuickPickOptions = {

matchOnDetail: true,

matchOnDescription: true,

placeHolder: "Select the process to attach to"

};

return vscode.window.showQuickPick(processes, attachPickOptions)

.then(item => {

return item ? item.id : Promise.reject<string>(new Error("Process not selected."));

});

});

}

});

}

private getRemoteOSAndProcesses(pipeCmd: string): Promise<AttachItem[]> {

// Commands to get OS and processes

const command: string = `sh -c "uname && if [ $(uname) = \\\"Linux\\\" ] ; then ${PsProcessParser.psLinuxCommand} ; elif [ $(uname) = \\\"Darwin\\\" ] ; ` +

`then ${PsProcessParser.psDarwinCommand}; fi"`;

// Must use single quotes around ${command}. Linux systems evaluate $() within double-quotes.

return execChildProcess(`${pipeCmd} '${command}'`, null, this._channel).then(output => {

// OS will be on first line

// Processess will follow if listed

let lines: string[] = output.split(/\r?\n/);

if (lines.length === 0) {

return Promise.reject<AttachItem[]>(new Error("Pipe transport failed to get OS and processes."));

} else {

let remoteOS: string = lines[0].replace(/[\r\n]+/g, '');

if (remoteOS !== "Linux" && remoteOS !== "Darwin") {

return Promise.reject<AttachItem[]>(new Error(`Operating system "${remoteOS}" not supported.`));

}

// Only got OS from uname

if (lines.length === 1) {

return Promise.reject<AttachItem[]>(new Error("Transport attach could not obtain processes list."));

} else {

let processes: string[] = lines.slice(1);

return PsProcessParser.ParseProcessFromPsArray(processes)

.sort((a, b) => {

if (a.name === undefined) {

if (b.name === undefined) {

return 0;

}

return 1;

}

if (b.name === undefined) {

return -1;

}

let aLower: string = a.name.toLowerCase();

let bLower: string = b.name.toLowerCase();

if (aLower === bLower) {

return 0;

}

return aLower < bLower ? -1 : 1;

})

.map(p => p.toAttachItem());

}

}

});

}

private static createArgumentList(args: string[]): string {

let argsString: string = "";

for (let arg of args) {

if (argsString) {

argsString += " ";

}

argsString += `"${arg}"`;

}

return argsString;

}

}