import { DockerfileServiceImpl, DockerfileInfoImpl } from './dockerfile.service.impl';
import Spy = jasmine.Spy;


describe("DockerfileServiceImpl", () => {
  var dockerfileServiceImpl: DockerfileServiceImpl;
  var dataFileServiceMock: any;
  var configMock: any;
  var fileReaderMock: FileReader;

  beforeEach(() => {
    dataFileServiceMock = jasmine.createSpyObj('dataFileServiceMock', [
      'readDataArrayAsPossibleArchive',
      'arrayToString',
      'blobToString',
    ]);
    configMock = jasmine.createSpyObj('configMock', ['getDomain']);
    fileReaderMock = new FileReader();
    dockerfileServiceImpl = new DockerfileServiceImpl(dataFileServiceMock, configMock, () => fileReaderMock);
  });

  describe("getDockerfile", () => {
    var file: any;
    var readAsFileBufferSpy: Spy;

    beforeEach(() => {
      dataFileServiceMock.readDataArrayAsPossibleArchive.and.callFake((buf, success, failure) => {
        var files: any[] = [];
        failure(files);
      });

      dataFileServiceMock.arrayToString.and.callFake((buf, callback) => {
        var contents: string = "";
        callback(contents);
      });

      dataFileServiceMock.blobToString.and.callFake((blob, callback) => {
        var contents: string = "";
        callback(contents);
      });

      spyOn(DockerfileInfoImpl, "forData").and.returnValue(null);
      readAsFileBufferSpy = spyOn(fileReaderMock, "readAsArrayBuffer").and.callFake(() => {
        var event: any = {target: {result: file}};
        fileReaderMock.onload(event);
      });

      file = "FROM quay.io/coreos/nginx:latest";
    });

    it("calls datafile service to read given file as possible archive file", (done) => {
      dockerfileServiceImpl.getDockerfile(file,
        (dockerfile: DockerfileInfoImpl) => {
          fail("Should not invoke success callback");
          done();
        },
        (error: Event | string) => {
          expect(readAsFileBufferSpy.calls.argsFor(0)[0]).toEqual(file);
          expect(dataFileServiceMock.readDataArrayAsPossibleArchive).toHaveBeenCalled();
          done();
        });
    });

    it("calls datafile service to convert file to string if given file is not an archive", (done) => {
      dockerfileServiceImpl.getDockerfile(file,
        (dockerfile: DockerfileInfoImpl) => {
          fail("Should not invoke success callback");
          done();
        },
        (error: Event | string) => {
          expect(dataFileServiceMock.arrayToString.calls.argsFor(0)[0]).toEqual(file);
          done();
        });
    });

    it("calls failure callback if given non-archive file that is not a valid Dockerfile", (done) => {
      dockerfileServiceImpl.getDockerfile(file,
        (dockerfile: DockerfileInfoImpl) => {
          fail("Should not invoke success callback");
          done();
        },
        (error: Event | string) => {
          expect(error).toEqual('File chosen is not a valid Dockerfile');
          done();
        });
    });

    it("calls success callback with new DockerfileInfoImpl instance if given valid Dockerfile", (done) => {
      done();
    });

    it("calls failure callback if given archive file with no Dockerfile present in root directory", (done) => {
      done();
    });

    it("calls datafile service to convert blob to string if given file is an archive", (done) => {
      done();
    });

    it("calls failure callback if given archive file with invalid Dockerfile", (done) => {
      done();
    });

    it("calls success callback with new DockerfileInfoImpl instance if given archive with valid Dockerfile", (done) => {
      done();
    });
  });

  describe("extractDockerfile", () => {
    // TODO
  });
});


describe("DockerfileInfoImpl", () => {
  var dockerfileInfoImpl: DockerfileInfoImpl;
  var contents: string;
  var configMock: any;

  beforeEach(() => {
    contents = "";
    configMock = jasmine.createSpyObj('configMock', ['getDomain']);
    dockerfileInfoImpl = new DockerfileInfoImpl(contents, configMock);
  });

  describe("forData", () => {

    it("returns null if given contents do not contain a 'FROM' command", () => {
      expect(DockerfileInfoImpl.forData(contents, configMock)).toBe(null);
    });

    it("returns a new DockerfileInfoImpl instance if given contents are valid", () => {
      contents = "FROM quay.io/coreos/nginx";

      expect(DockerfileInfoImpl.forData(contents, configMock) instanceof DockerfileInfoImpl).toBe(true);
    });
  });

  describe("getRegistryBaseImage", () => {
    var domain: string;

    beforeEach(() => {
      domain = "quay.io";
    });

    it("returns null if instance's contents do not contain a 'FROM' command", () => {
      var getBaseImageSpy: Spy = spyOn(dockerfileInfoImpl, "getBaseImage").and.returnValue(null);

      expect(dockerfileInfoImpl.getRegistryBaseImage()).toBe(null);
      expect(getBaseImageSpy).toHaveBeenCalled();
    });

    it("returns null if the domain of the instance's config does not match that of the base image", () => {
      configMock.getDomain.and.returnValue(domain);
      spyOn(dockerfileInfoImpl, "getBaseImage").and.returnValue('host.com');

      expect(dockerfileInfoImpl.getRegistryBaseImage()).toBe(null);
      expect(configMock.getDomain).toHaveBeenCalled();
    });

    it("returns the registry base image", () => {
      spyOn(dockerfileInfoImpl, "getBaseImage").and.returnValue(null);
    });
  });

  describe("getBaseImage", () => {
    var host: string;
    var port: number;
    var tag: string;
    var image: string;

    beforeEach(() => {
      host = 'quay.io';
      port = 80;
      tag = 'latest';
      image = 'coreos/nginx';
    });

    it("returns null if instance's contents do not contain a 'FROM' command", () => {
      var getBaseImageAndTagSpy: Spy = spyOn(dockerfileInfoImpl, "getBaseImageAndTag").and.returnValue(null);

      expect(dockerfileInfoImpl.getBaseImage()).toBe(null);
      expect(getBaseImageAndTagSpy).toHaveBeenCalled();
    });

    it("returns the image name if in the format 'someimage'", () => {
      spyOn(dockerfileInfoImpl, "getBaseImageAndTag").and.returnValue(image);

      expect(dockerfileInfoImpl.getBaseImage()).toEqual(image);
    });

    it("returns the image name if in the format 'someimage:tag'", () => {
      spyOn(dockerfileInfoImpl, "getBaseImageAndTag").and.returnValue(`${image}:${tag}`);

      expect(dockerfileInfoImpl.getBaseImage()).toEqual(image);
    });

    it("returns the host, port, and image name if in the format 'host:port/someimage'", () => {
      spyOn(dockerfileInfoImpl, "getBaseImageAndTag").and.returnValue(`${host}:${port}/${image}`);

      expect(dockerfileInfoImpl.getBaseImage()).toEqual(`${host}:${port}/${image}`);
    });

    it("returns the host, port, and image name if in the format 'host:port/someimage:tag'", () => {
      spyOn(dockerfileInfoImpl, "getBaseImageAndTag").and.returnValue(`${host}:${port}/${image}:${tag}`);

      expect(dockerfileInfoImpl.getBaseImage()).toEqual(`${host}:${port}/${image}`);
    });
  });

  describe("getBaseImageAndTag", () => {

    it("returns null if instance's contents do not contain a 'FROM' command", () => {
      expect(dockerfileInfoImpl.getBaseImageAndTag()).toBe(null);
    });

    it("returns a string containing the base image and tag from the instance's contents", () => {
      contents = "FROM quay.io/coreos/nginx";
      dockerfileInfoImpl = new DockerfileInfoImpl(contents, configMock);
      var baseImageAndTag: string = dockerfileInfoImpl.getBaseImageAndTag();

      expect(baseImageAndTag).toEqual(contents.substring('FROM '.length, contents.length).trim());
    });

    it("handles the presence of newlines", () => {
      contents = "FROM quay.io/coreos/nginx\nRUN echo $0";
      dockerfileInfoImpl = new DockerfileInfoImpl(contents, configMock);
      var baseImageAndTag: string = dockerfileInfoImpl.getBaseImageAndTag();

      expect(baseImageAndTag).toEqual(contents.substring('FROM '.length, contents.indexOf('\n')).trim());
    });
  });
});