import { parseJson } from '@nx/devkit';
import {
  createFileSync,
  ensureDirSync,
  readdirSync,
  readFileSync,
  removeSync,
  renameSync,
  statSync,
  writeFileSync,
} from 'fs-extra';
import * as path from 'path';
import { e2eCwd } from './get-env-info';
import { tmpProjPath } from './create-project-utils';

export function createFile(f: string, content: string = ''): void {
  const path = tmpProjPath(f);
  createFileSync(path);
  if (content) {
    updateFile(f, content);
  }
}

export function updateFile(
  f: string,
  content: string | ((content: string) => string)
): void {
  ensureDirSync(path.dirname(tmpProjPath(f)));
  if (typeof content === 'string') {
    writeFileSync(tmpProjPath(f), content);
  } else {
    writeFileSync(
      tmpProjPath(f),
      content(readFileSync(tmpProjPath(f)).toString())
    );
  }
}

export function renameFile(f: string, newPath: string): void {
  ensureDirSync(path.dirname(tmpProjPath(newPath)));
  renameSync(tmpProjPath(f), tmpProjPath(newPath));
}

export function checkFilesExist(...expectedFiles: string[]) {
  expectedFiles.forEach((f) => {
    const ff = f.startsWith('/') ? f : tmpProjPath(f);
    if (!exists(ff)) {
      throw new Error(`File '${ff}' does not exist`);
    }
  });
}

export function updateJson<T extends object = any, U extends object = T>(
  f: string,
  updater: (value: T) => U
) {
  updateFile(f, (s) => {
    const json = JSON.parse(s);
    return JSON.stringify(updater(json), null, 2);
  });
}

export function checkFilesDoNotExist(...expectedFiles: string[]) {
  expectedFiles.forEach((f) => {
    const ff = f.startsWith('/') ? f : tmpProjPath(f);
    if (exists(ff)) {
      throw new Error(`File '${ff}' should not exist`);
    }
  });
}

export function listFiles(dirName: string) {
  return readdirSync(tmpProjPath(dirName));
}

export function readJson<T extends Object = any>(f: string): T {
  const content = readFile(f);
  return parseJson<T>(content);
}

export function readFile(f: string) {
  const ff = f.startsWith('/') ? f : tmpProjPath(f);
  return readFileSync(ff, 'utf-8');
}

export function removeFile(f: string) {
  const ff = f.startsWith('/') ? f : tmpProjPath(f);
  removeSync(ff);
}

export function rmDist() {
  removeSync(`${tmpProjPath()}/dist`);
}

export function directoryExists(filePath: string): boolean {
  try {
    return statSync(filePath).isDirectory();
  } catch (err) {
    return false;
  }
}

export function fileExists(filePath: string): boolean {
  try {
    return statSync(filePath).isFile();
  } catch (err) {
    return false;
  }
}

export function exists(filePath: string): boolean {
  return directoryExists(filePath) || fileExists(filePath);
}

export function getSize(filePath: string): number {
  return statSync(filePath).size;
}

export function tmpBackupProjPath(path?: string) {
  return path ? `${e2eCwd}/proj-backup/${path}` : `${e2eCwd}/proj-backup`;
}

export function tmpBackupNgCliProjPath(path?: string) {
  return path
    ? `${e2eCwd}/ng-cli-proj-backup/${path}`
    : `${e2eCwd}/ng-cli-proj-backup`;
}