import { Configuration, Linter } from 'tslint';

import { Logger } from './options/logger';
import { QuoteCharacter } from './options/quoteCharacter';
import { Signale } from 'signale';
import { Directory } from './interfaces/directory.interface';
import { FileTreeLocation } from './interfaces/location.interface';

export function mockFsConfiguration() {
  return {
    'code.ts': "export const code = 'Hello Saturn!'",
    directory1: {
      'barrel.ts': "@file Automatically generated by barrelsby. export const code = 'Hello Graham!'",
      directory2: {
        directory4: {
          'deeplyNested.ts': "export const code = 'Heya Wurrl",
        },
        'script.ts': "export const code = 'Hello Detroit!'",
      },
      directory3: {
        'program.ts': "export const code = 'Hello Detroit!'",
      },
      'ignore.txt': "export const code = 'Goodbye World!'",
      'index.ts': "export const code = 'Hello World!'",
    },
  };
}

export function mockDirectoryTree(): Directory {
  return {
    directories: [
      {
        directories: [
          {
            directories: [],
            files: [
              {
                name: 'deeplyNested.ts',
                path: 'directory1/directory2/directory4/deeplyNested.ts',
              },
            ],
            name: 'directory4',
            path: 'directory1/directory2/directory4',
          },
        ],
        files: [
          {
            name: 'script.ts',
            path: 'directory1/directory2/script.ts',
          },
        ],
        name: 'directory2',
        path: 'directory1/directory2',
      },
      {
        directories: [],
        files: [
          {
            name: 'program.ts',
            path: 'directory1/directory3/program.ts',
          },
        ],
        name: 'directory3',
        path: 'directory1/directory3',
      },
    ],
    files: [
      {
        name: 'barrel.ts',
        path: 'directory1/barrel.ts',
      },
      {
        name: 'ignore.txt',
        path: 'directory1/ignore.txt',
      },
      {
        name: 'index.ts',
        path: 'directory1/index.ts',
      },
    ],
    name: 'directory1',
    path: './directory1',
  };
}

export function mockModules(rootDirectory: Directory): FileTreeLocation[] {
  const getModules = (directory: Directory): FileTreeLocation[] =>
    directory.directories.reduce((previous: FileTreeLocation[], current: Directory) => {
      return previous.concat(getModules(current));
    }, directory.files);
  return getModules(rootDirectory).filter(module => module.name.indexOf('.ts') >= 0);
}

// Gets a mock Options object.
export function mockLogger(_: string[]): Logger {
  return new Signale();
}

// Multiline string assertion to give more useful output messages.
export function assertMultiLine(actual: string, expected: string): void {
  const actualParts = actual.split('\n');
  const expectParts = expected.split('\n');
  expect(actualParts.length).toEqual(expectParts.length);
  actualParts.forEach((actualPart, index) => {
    expect(actualPart).toEqual(expectParts[index]);
  });
}

// Runs tslint against the specified file and checks there are no errors.
export function tslint(content: string, quoteCharacter: QuoteCharacter) {
  const linter = new Linter({ fix: false, formatter: 'json' });
  const configuration = Configuration.loadConfigurationFromPath('./tslint.json');
  if (quoteCharacter === "'") {
    configuration.rules.set('quotemark', {
      ruleArguments: ['single', 'avoid-escape'],
    });
  }
  linter.lint('test_output.ts', content, configuration);
  /* istanbul ignore next: Should not be hit during successful test execution. */
  const failures = linter
    .getResult()
    .failures.map(failure => `${failure.getRuleName()} ${failure.getStartPosition().getLineAndCharacter().line}`);
  expect(failures).toEqual([]);
}