const path = require('path');
const Package = require('../src/package');
const ThemePackage = require('../src/theme-package');
const { mockLocalStorage } = require('./spec-helper');

describe('Package', function() {
  const build = (constructor, packagePath) =>
    new constructor({
      path: packagePath,
      packageManager: atom.packages,
      config: atom.config,
      styleManager: atom.styles,
      notificationManager: atom.notifications,
      keymapManager: atom.keymaps,
      commandRegistry: atom.command,
      grammarRegistry: atom.grammars,
      themeManager: atom.themes,
      menuManager: atom.menu,
      contextMenuManager: atom.contextMenu,
      deserializerManager: atom.deserializers,
      viewRegistry: atom.views
    });

  const buildPackage = packagePath => build(Package, packagePath);

  const buildThemePackage = themePath => build(ThemePackage, themePath);

  describe('when the package contains incompatible native modules', function() {
    beforeEach(function() {
      atom.packages.devMode = false;
      mockLocalStorage();
    });

    afterEach(() => (atom.packages.devMode = true));

    it('does not activate it', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-incompatible-native-module');
      const pack = buildPackage(packagePath);
      expect(pack.isCompatible()).toBe(false);
      expect(pack.incompatibleModules[0].name).toBe('native-module');
      expect(pack.incompatibleModules[0].path).toBe(
        path.join(packagePath, 'node_modules', 'native-module')
      );
    });

    it('detects the package as incompatible even if .node file is loaded conditionally', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve(
          'packages/package-with-incompatible-native-module-loaded-conditionally'
        );
      const pack = buildPackage(packagePath);
      expect(pack.isCompatible()).toBe(false);
      expect(pack.incompatibleModules[0].name).toBe('native-module');
      expect(pack.incompatibleModules[0].path).toBe(
        path.join(packagePath, 'node_modules', 'native-module')
      );
    });

    it("utilizes _atomModuleCache if present to determine the package's native dependencies", function() {
      let packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-ignored-incompatible-native-module');
      let pack = buildPackage(packagePath);
      expect(pack.getNativeModuleDependencyPaths().length).toBe(1); // doesn't see the incompatible module
      expect(pack.isCompatible()).toBe(true);

      packagePath = __guard__(atom.project.getDirectories()[0], x =>
        x.resolve('packages/package-with-cached-incompatible-native-module')
      );
      pack = buildPackage(packagePath);
      expect(pack.isCompatible()).toBe(false);
    });

    it('caches the incompatible native modules in local storage', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-incompatible-native-module');
      expect(buildPackage(packagePath).isCompatible()).toBe(false);
      expect(global.localStorage.getItem.callCount).toBe(1);
      expect(global.localStorage.setItem.callCount).toBe(1);

      expect(buildPackage(packagePath).isCompatible()).toBe(false);
      expect(global.localStorage.getItem.callCount).toBe(2);
      expect(global.localStorage.setItem.callCount).toBe(1);
    });

    it('logs an error to the console describing the problem', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-incompatible-native-module');

      spyOn(console, 'warn');
      spyOn(atom.notifications, 'addFatalError');

      buildPackage(packagePath).activateNow();

      expect(atom.notifications.addFatalError).not.toHaveBeenCalled();
      expect(console.warn.callCount).toBe(1);
      expect(console.warn.mostRecentCall.args[0]).toContain(
        'it requires one or more incompatible native modules (native-module)'
      );
    });
  });

  describe('::rebuild()', function() {
    beforeEach(function() {
      atom.packages.devMode = false;
      mockLocalStorage();
    });

    afterEach(() => (atom.packages.devMode = true));

    it('returns a promise resolving to the results of `apm rebuild`', function() {
      const packagePath = __guard__(atom.project.getDirectories()[0], x =>
        x.resolve('packages/package-with-index')
      );
      const pack = buildPackage(packagePath);
      const rebuildCallbacks = [];
      spyOn(pack, 'runRebuildProcess').andCallFake(callback =>
        rebuildCallbacks.push(callback)
      );

      const promise = pack.rebuild();
      rebuildCallbacks[0]({
        code: 0,
        stdout: 'stdout output',
        stderr: 'stderr output'
      });

      waitsFor(done =>
        promise.then(function(result) {
          expect(result).toEqual({
            code: 0,
            stdout: 'stdout output',
            stderr: 'stderr output'
          });
          done();
        })
      );
    });

    it('persists build failures in local storage', function() {
      const packagePath = __guard__(atom.project.getDirectories()[0], x =>
        x.resolve('packages/package-with-index')
      );
      const pack = buildPackage(packagePath);

      expect(pack.isCompatible()).toBe(true);
      expect(pack.getBuildFailureOutput()).toBeNull();

      const rebuildCallbacks = [];
      spyOn(pack, 'runRebuildProcess').andCallFake(callback =>
        rebuildCallbacks.push(callback)
      );

      pack.rebuild();
      rebuildCallbacks[0]({ code: 13, stderr: 'It is broken' });

      expect(pack.getBuildFailureOutput()).toBe('It is broken');
      expect(pack.getIncompatibleNativeModules()).toEqual([]);
      expect(pack.isCompatible()).toBe(false);

      // A different package instance has the same failure output (simulates reload)
      const pack2 = buildPackage(packagePath);
      expect(pack2.getBuildFailureOutput()).toBe('It is broken');
      expect(pack2.isCompatible()).toBe(false);

      // Clears the build failure after a successful build
      pack.rebuild();
      rebuildCallbacks[1]({ code: 0, stdout: 'It worked' });

      expect(pack.getBuildFailureOutput()).toBeNull();
      expect(pack2.getBuildFailureOutput()).toBeNull();
    });

    it('sets cached incompatible modules to an empty array when the rebuild completes (there may be a build error, but rebuilding *deletes* native modules)', function() {
      const packagePath = __guard__(atom.project.getDirectories()[0], x =>
        x.resolve('packages/package-with-incompatible-native-module')
      );
      const pack = buildPackage(packagePath);

      expect(pack.getIncompatibleNativeModules().length).toBeGreaterThan(0);

      const rebuildCallbacks = [];
      spyOn(pack, 'runRebuildProcess').andCallFake(callback =>
        rebuildCallbacks.push(callback)
      );

      pack.rebuild();
      expect(pack.getIncompatibleNativeModules().length).toBeGreaterThan(0);
      rebuildCallbacks[0]({ code: 0, stdout: 'It worked' });
      expect(pack.getIncompatibleNativeModules().length).toBe(0);
    });
  });

  describe('theme', function() {
    let [editorElement, theme] = [];

    beforeEach(function() {
      editorElement = document.createElement('atom-text-editor');
      jasmine.attachToDOM(editorElement);
    });

    afterEach(() =>
      waitsForPromise(function() {
        if (theme != null) {
          return Promise.resolve(theme.deactivate());
        }
      })
    );

    describe('when the theme contains a single style file', function() {
      it('loads and applies css', function() {
        expect(getComputedStyle(editorElement).paddingBottom).not.toBe(
          '1234px'
        );
        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-with-index-css')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
        expect(getComputedStyle(editorElement).paddingTop).toBe('1234px');
      });

      it('parses, loads and applies less', function() {
        expect(getComputedStyle(editorElement).paddingBottom).not.toBe(
          '1234px'
        );
        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-with-index-less')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
        expect(getComputedStyle(editorElement).paddingTop).toBe('4321px');
      });
    });

    describe('when the theme contains a package.json file', () =>
      it('loads and applies stylesheets from package.json in the correct order', function() {
        expect(getComputedStyle(editorElement).paddingTop).not.toBe('101px');
        expect(getComputedStyle(editorElement).paddingRight).not.toBe('102px');
        expect(getComputedStyle(editorElement).paddingBottom).not.toBe('103px');

        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-with-package-file')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
        expect(getComputedStyle(editorElement).paddingTop).toBe('101px');
        expect(getComputedStyle(editorElement).paddingRight).toBe('102px');
        expect(getComputedStyle(editorElement).paddingBottom).toBe('103px');
      }));

    describe('when the theme does not contain a package.json file and is a directory', () =>
      it('loads all stylesheet files in the directory', function() {
        expect(getComputedStyle(editorElement).paddingTop).not.toBe('10px');
        expect(getComputedStyle(editorElement).paddingRight).not.toBe('20px');
        expect(getComputedStyle(editorElement).paddingBottom).not.toBe('30px');

        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-without-package-file')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
        expect(getComputedStyle(editorElement).paddingTop).toBe('10px');
        expect(getComputedStyle(editorElement).paddingRight).toBe('20px');
        expect(getComputedStyle(editorElement).paddingBottom).toBe('30px');
      }));

    describe('reloading a theme', function() {
      beforeEach(function() {
        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-with-package-file')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
      });

      it('reloads without readding to the stylesheets list', function() {
        expect(theme.getStylesheetPaths().length).toBe(3);
        theme.reloadStylesheets();
        expect(theme.getStylesheetPaths().length).toBe(3);
      });
    });

    describe('events', function() {
      beforeEach(function() {
        const themePath = __guard__(atom.project.getDirectories()[0], x =>
          x.resolve('packages/theme-with-package-file')
        );
        theme = buildThemePackage(themePath);
        theme.activate();
      });

      it('deactivated event fires on .deactivate()', function() {
        let spy;
        theme.onDidDeactivate((spy = jasmine.createSpy()));
        waitsForPromise(() => Promise.resolve(theme.deactivate()));
        runs(() => expect(spy).toHaveBeenCalled());
      });
    });
  });

  describe('.loadMetadata()', function() {
    let [packagePath, metadata] = [];

    beforeEach(function() {
      packagePath = __guard__(atom.project.getDirectories()[0], x =>
        x.resolve('packages/package-with-different-directory-name')
      );
      metadata = atom.packages.loadPackageMetadata(packagePath, true);
    });

    it('uses the package name defined in package.json', () =>
      expect(metadata.name).toBe('package-with-a-totally-different-name'));
  });

  describe('the initialize() hook', function() {
    it('gets called when the package is activated', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-deserializers');
      const pack = buildPackage(packagePath);
      pack.requireMainModule();
      const { mainModule } = pack;
      spyOn(mainModule, 'initialize');
      expect(mainModule.initialize).not.toHaveBeenCalled();
      pack.activate();
      expect(mainModule.initialize).toHaveBeenCalled();
      expect(mainModule.initialize.callCount).toBe(1);
    });

    it('gets called when a deserializer is used', function() {
      const packagePath = atom.project
        .getDirectories()[0]
        .resolve('packages/package-with-deserializers');
      const pack = buildPackage(packagePath);
      pack.requireMainModule();
      const { mainModule } = pack;
      spyOn(mainModule, 'initialize');
      pack.load();
      expect(mainModule.initialize).not.toHaveBeenCalled();
      atom.deserializers.deserialize({ deserializer: 'Deserializer1', a: 'b' });
      expect(mainModule.initialize).toHaveBeenCalled();
    });
  });
});

function __guard__(value, transform) {
  return typeof value !== 'undefined' && value !== null
    ? transform(value)
    : undefined;
}