var testPackage = require('../../helpers/test-package');
var Dgeni = require('dgeni');
var path = require('path');

describe('collectExampleRegions processor', () => {
  var injector, processor, exampleMap, regionParser;

  beforeEach(function() {

    regionParser = jasmine.createSpy('regionParser').and.callFake(function(contents, extension) {
      return { contents: 'PARSED:' + contents, regions: {dummy: extension} }
    });

    const dgeni =
        new Dgeni([testPackage('examples-package', true).factory('regionParser', function() {
          return regionParser;
        })]);

    injector = dgeni.configureInjector();
    exampleMap = injector.get('exampleMap');
    processor = injector.get('collectExamples');

    processor.exampleFolders = ['examples-1', 'examples-2'];
  });

  it('should identify example files that are in the exampleFolders', () => {
    const docs = [
      createDoc('A', 'examples-1/x/app.js'), createDoc('B', 'examples-1/y/index.html'),
      createDoc('C', 'examples-2/s/app.js'), createDoc('D', 'examples-2/t/style.css'),
      createDoc('E', 'other/b/c.js')
    ];

    processor.$process(docs);

    expect(exampleMap['examples-1']['x/app.js']).toBeDefined();
    expect(exampleMap['examples-1']['y/index.html']).toBeDefined();
    expect(exampleMap['examples-2']['s/app.js']).toBeDefined();
    expect(exampleMap['examples-2']['t/style.css']).toBeDefined();

    expect(exampleMap['other']).toBeUndefined();
  });

  it('should remove example files from the docs collection', () => {
    const docs = [
      createDoc('Example A', 'examples-1/x/app.js'),
      createDoc('Example B', 'examples-1/y/index.html'),
      createDoc('Other doc 1', 'examples-2/t/style.css', 'content'),
      createDoc('Example C', 'examples-2/s/app.js'),
      createDoc('Other doc 2', 'other/b/c.js', 'content')
    ];

    const processedDocs = processor.$process(docs);

    expect(processedDocs.filter(doc => doc.docType === 'example-file')).toEqual([]);
  });

  it('should not remove docs from the docs collection that are not example files', () => {
    const docs = [
      createDoc('Example A', 'examples-1/x/app.js'),
      createDoc('Example B', 'examples-1/y/index.html'),
      createDoc('Other doc 1', 'examples-2/t/style.css', 'content'),
      createDoc('Example C', 'examples-2/s/app.js'),
      createDoc('Other doc 2', 'other/b/c.js', 'content')
    ];

    const processedDocs = processor.$process(docs);

    expect(processedDocs.filter(doc => doc.docType !== 'example-file'))
        .toEqual(jasmine.objectContaining([
          createDoc('Other doc 1', 'examples-2/t/style.css', 'content'),
          createDoc('Other doc 2', 'other/b/c.js', 'content')
        ]));
  });

  it('should call `regionParser` from with the content and file extension of each example doc',
     () => {
       const docs = [
         createDoc('Example A', 'examples-1/x/app.js'),
         createDoc('Example B', 'examples-1/y/index.html'),
         createDoc('Other doc 1', 'examples-2/t/style.css', 'content'),
         createDoc('Example C', 'examples-2/s/app.js'),
         createDoc('Other doc 2', 'other/b/c.js', 'content')
       ];

       const processedDocs = processor.$process(docs);

       expect(regionParser).toHaveBeenCalledTimes(3);
       expect(regionParser).toHaveBeenCalledWith('Example A', 'js');
       expect(regionParser).toHaveBeenCalledWith('Example B', 'html');
       expect(regionParser).toHaveBeenCalledWith('Example C', 'js');
     });


  it('should attach parsed content as renderedContent to the example file docs', () => {
    const docs = [
      createDoc('A', 'examples-1/x/app.js'),
      createDoc('B', 'examples-1/y/index.html'),
      createDoc('C', 'examples-2/s/app.js'),
      createDoc('D', 'examples-2/t/style.css'),
    ];

    processor.$process(docs);

    expect(exampleMap['examples-1']['x/app.js'].renderedContent).toEqual('PARSED:A');
    expect(exampleMap['examples-1']['y/index.html'].renderedContent).toEqual('PARSED:B');
    expect(exampleMap['examples-2']['s/app.js'].renderedContent).toEqual('PARSED:C');
    expect(exampleMap['examples-2']['t/style.css'].renderedContent).toEqual('PARSED:D');

  });

  it('should create region docs for each region in the example file docs', () => {
    const docs = [
      createDoc('/* #docregion X */\nA', 'examples-1/x/app.js'),
      createDoc('<!-- #docregion Y -->\nB', 'examples-1/y/index.html'),
      createDoc('/* #docregion Z */\nC', 'examples-2/t/style.css'),
    ];

    const newDocs = processor.$process(docs);

    expect(newDocs.length).toEqual(3);
    expect(newDocs).toEqual([
      jasmine.objectContaining({
        docType: 'example-region',
        name: 'dummy',
        id: 'examples-1/x/app.js#dummy',
        contents: 'js'
      }),
      jasmine.objectContaining({
        docType: 'example-region',
        name: 'dummy',
        id: 'examples-1/y/index.html#dummy',
        contents: 'html'
      }),
      jasmine.objectContaining({
        docType: 'example-region',
        name: 'dummy',
        id: 'examples-2/t/style.css#dummy',
        contents: 'css'
      })
    ]);
  });

  it('should attach region docs to the example file docs', () => {
    const docs = [
      createDoc('/* #docregion X */\nA', 'examples-1/x/app.js'),
      createDoc('<!-- #docregion Y -->\nB', 'examples-1/y/index.html'),
      createDoc('/* #docregion Z */\nC', 'examples-2/t/style.css'),
    ];

    processor.$process(docs);

    expect(exampleMap['examples-1']['x/app.js'].regions).toEqual({
      dummy: {
        docType: 'example-region',
        path: 'examples-1/x/app.js',
        name: 'dummy',
        id: 'examples-1/x/app.js#dummy',
        aliases: ['examples-1/x/app.js#dummy'],
        contents: 'js'
      }
    });
    expect(exampleMap['examples-1']['y/index.html'].regions).toEqual({
      dummy: {
        docType: 'example-region',
        path: 'examples-1/y/index.html',
        name: 'dummy',
        id: 'examples-1/y/index.html#dummy',
        aliases: ['examples-1/y/index.html#dummy'],
        contents: 'html'
      }
    });
    expect(exampleMap['examples-2']['t/style.css'].regions).toEqual({
      dummy: {
        docType: 'example-region',
        path: 'examples-2/t/style.css',
        name: 'dummy',
        id: 'examples-2/t/style.css#dummy',
        aliases: ['examples-2/t/style.css#dummy'],
        contents: 'css'
      }
    });
  });
});


function createDoc(content, relativePath, docType) {
  return {
    fileInfo: {relativePath: relativePath, extension: path.extname(relativePath).substr(1)},
    content: content,
    docType: docType || 'example-file',
    startingLine: 1
  };
}