import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';
import * as context from '../src/context';

jest.spyOn(context, 'tmpDir').mockImplementation((): string => {
  const tmpDir = path.join('/tmp/.docker-setup-buildx-jest').split(path.sep).join(path.posix.sep);
  if (!fs.existsSync(tmpDir)) {
    fs.mkdirSync(tmpDir, {recursive: true});
  }
  return tmpDir;
});

describe('getInputList', () => {
  it('handles single line correctly', async () => {
    await setInput('foo', 'bar');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar']);
  });

  it('handles multiple lines correctly', async () => {
    setInput('foo', 'bar\nbaz');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz']);
  });

  it('remove empty lines correctly', async () => {
    setInput('foo', 'bar\n\nbaz');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz']);
  });

  it('handles comma correctly', async () => {
    setInput('foo', 'bar,baz');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz']);
  });

  it('remove empty result correctly', async () => {
    setInput('foo', 'bar,baz,');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz']);
  });

  it('handles different new lines correctly', async () => {
    setInput('foo', 'bar\r\nbaz');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz']);
  });

  it('handles different new lines and comma correctly', async () => {
    setInput('foo', 'bar\r\nbaz,bat');
    const res = await context.getInputList('foo');
    console.log(res);
    expect(res).toEqual(['bar', 'baz', 'bat']);
  });

  it('handles multiple lines and ignoring comma correctly', async () => {
    setInput('driver-opts', 'image=moby/buildkit:master\nnetwork=host');
    const res = await context.getInputList('driver-opts', true);
    console.log(res);
    expect(res).toEqual(['image=moby/buildkit:master', 'network=host']);
  });

  it('handles different new lines and ignoring comma correctly', async () => {
    setInput('driver-opts', 'image=moby/buildkit:master\r\nnetwork=host');
    const res = await context.getInputList('driver-opts', true);
    console.log(res);
    expect(res).toEqual(['image=moby/buildkit:master', 'network=host']);
  });
});

describe('asyncForEach', () => {
  it('executes async tasks sequentially', async () => {
    const testValues = [1, 2, 3, 4, 5];
    const results: number[] = [];

    await context.asyncForEach(testValues, async value => {
      results.push(value);
    });

    expect(results).toEqual(testValues);
  });
});

describe('setOutput', () => {
  beforeEach(() => {
    process.stdout.write = jest.fn();
  });

  it('setOutput produces the correct command', () => {
    context.setOutput('some output', 'some value');
    assertWriteCalls([`::set-output name=some output::some value${os.EOL}`]);
  });

  it('setOutput handles bools', () => {
    context.setOutput('some output', false);
    assertWriteCalls([`::set-output name=some output::false${os.EOL}`]);
  });

  it('setOutput handles numbers', () => {
    context.setOutput('some output', 1.01);
    assertWriteCalls([`::set-output name=some output::1.01${os.EOL}`]);
  });
});

// See: https://github.com/actions/toolkit/blob/master/packages/core/src/core.ts#L67
function getInputName(name: string): string {
  return `INPUT_${name.replace(/ /g, '_').toUpperCase()}`;
}

function setInput(name: string, value: string): void {
  process.env[getInputName(name)] = value;
}

// Assert that process.stdout.write calls called only with the given arguments.
function assertWriteCalls(calls: string[]): void {
  expect(process.stdout.write).toHaveBeenCalledTimes(calls.length);
  for (let i = 0; i < calls.length; i++) {
    expect(process.stdout.write).toHaveBeenNthCalledWith(i + 1, calls[i]);
  }
}