import { Message, SendActionsStore, ExtensionRegistry } from 'mailspring-exports';

const SendAction1 = {
  title: 'Send Action 1',
  isAvailableForDraft: () => true,
  performSendAction: () => {},
};

const SendAction2 = {
  title: 'Send Action 2',
  isAvailableForDraft: () => true,
  performSendAction: () => {},
};

const SendAction3 = {
  title: 'Send Action 3',
  isAvailableForDraft: () => true,
  performSendAction: () => {},
};

const NoTitleAction = {
  isAvailableForDraft: () => true,
  performSendAction: () => {},
};

const NoPerformAction = {
  title: 'No Perform',
  isAvailableForDraft: () => true,
};

const NotAvailableAction = {
  title: 'Not Available',
  isAvailableForDraft: () => false,
  performSendAction: () => {},
};

const GoodExtension = {
  name: 'GoodExtension',
  sendActions() {
    return [SendAction1];
  },
};

const BadExtension = {
  name: 'BadExtension',
  sendActions() {
    return [null];
  },
};

const NoTitleExtension = {
  name: 'NoTitleExtension',
  sendActions() {
    return [NoTitleAction];
  },
};

const NoPerformExtension = {
  name: 'NoPerformExtension',
  sendActions() {
    return [NoPerformAction];
  },
};

const NotAvailableExtension = {
  name: 'NotAvailableExtension',
  sendActions() {
    return [NotAvailableAction];
  },
};

const NullExtension = {
  name: 'NullExtension',
  sendActions() {
    return null;
  },
};

const OtherExtension = {
  name: 'OtherExtension',
  sendActions() {
    return [SendAction2, SendAction3];
  },
};

const { DefaultSendActionKey } = SendActionsStore;

function sendActionKeys() {
  return SendActionsStore.collectSendActions().map(({ configKey }) => configKey);
}

describe('SendActionsStore', function describeBlock() {
  beforeEach(() => {
    this.id = 'client-23';
    this.draft = new Message({ id: this.id, draft: true });
    spyOn(AppEnv, 'reportError');
  });

  describe('sendActions', () => {
    it('returns default action when no extensions registered', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey]);
    });

    it('returns correct send actions', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, OtherExtension]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([
        DefaultSendActionKey,
        'send-action-1',
        'send-action-2',
        'send-action-3',
      ]);
    });

    it('handles extensions that return null for `sendActions`', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, NullExtension]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey, 'send-action-1']);
    });

    it('handles extensions that return null actions', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, BadExtension]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey, 'send-action-1']);
    });

    it('omits and reports when action is missing a title', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, NoTitleExtension]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey, 'send-action-1']);
      expect(AppEnv.reportError).toHaveBeenCalled();
    });

    it('omits reports when action is missing performSendAction', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([
        GoodExtension,
        NoPerformExtension,
      ]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey, 'send-action-1']);
      expect(AppEnv.reportError).toHaveBeenCalled();
    });

    it('includes not available actions', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([
        GoodExtension,
        NotAvailableExtension,
      ]);
      SendActionsStore._onComposerExtensionsChanged();
      expect(sendActionKeys()).toEqual([DefaultSendActionKey, 'send-action-1', 'not-available']);
    });
  });

  describe('orderedSendActionsForDraft', () => {
    it('returns default action when no extensions registered', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([]);
      SendActionsStore._onComposerExtensionsChanged();
      const [preferred, ...rest] = SendActionsStore.orderedSendActionsForDraft();
      expect(preferred.configKey).toBe(DefaultSendActionKey);
      expect(rest).toEqual([]);
    });

    it('returns actions in correct grouping', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([
        GoodExtension,
        OtherExtension,
        NotAvailableExtension,
      ]);
      spyOn(AppEnv.config, 'get').andReturn('send-action-1');
      SendActionsStore._onComposerExtensionsChanged();
      const [preferred, ...rest] = SendActionsStore.orderedSendActionsForDraft();
      const restKeys = rest.map(({ configKey }) => configKey);
      expect(preferred.configKey).toBe('send-action-1');
      expect(restKeys).toEqual([DefaultSendActionKey, 'send-action-2', 'send-action-3']);
    });

    it('falls back to a default if value in config not present', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, OtherExtension]);
      spyOn(AppEnv.config, 'get').andReturn(null);
      SendActionsStore._onComposerExtensionsChanged();
      const [preferred] = SendActionsStore.orderedSendActionsForDraft();
      expect(preferred.configKey).toBe(DefaultSendActionKey);
    });

    it("falls back to a default if the primary item can't be found", () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([GoodExtension, OtherExtension]);
      spyOn(AppEnv.config, 'get').andReturn('does-not-exist');
      SendActionsStore._onComposerExtensionsChanged();
      const [preferred] = SendActionsStore.orderedSendActionsForDraft();
      expect(preferred.configKey).toBe(DefaultSendActionKey);
    });

    it('falls back to a default if the primary item is not available for draft', () => {
      spyOn(ExtensionRegistry.Composer, 'extensions').andReturn([
        GoodExtension,
        NotAvailableExtension,
      ]);
      spyOn(AppEnv.config, 'get').andReturn('not-available');
      SendActionsStore._onComposerExtensionsChanged();
      const [preferred] = SendActionsStore.orderedSendActionsForDraft();
      expect(preferred.configKey).toBe(DefaultSendActionKey);
    });
  });

  // TODO Should go Task spec
  it('catches any errors in an extension performSendAction method', () => {});
});