import { Thread } from '../../src/flux/models/thread';
import { Folder } from '../../src/flux/models/folder';
import { Label } from '../../src/flux/models/label';
import { Message } from '../../src/flux/models/message';
import FocusedContentStore from '../../src/flux/stores/focused-content-store';
import FocusedPerspectiveStore from '../../src/flux/stores/focused-perspective-store';
import { MessageStore } from '../../src/flux/stores/message-store';
import DatabaseStore from '../../src/flux/stores/database-store';
import { ChangeUnreadTask } from '../../src/flux/tasks/change-unread-task';
import * as Actions from '../../src/flux/actions';

const testThread = new Thread({ id: '123', accountId: TEST_ACCOUNT_ID });
const testMessage1 = new Message({
  folder: new Folder({ role: 'all' }),
  id: 'a',
  body: '123',
  files: [],
  accountId: TEST_ACCOUNT_ID,
});
const testMessage2 = new Message({
  folder: new Folder({ role: 'all' }),
  id: 'b',
  body: '123',
  files: [],
  accountId: TEST_ACCOUNT_ID,
});
const testMessage3 = new Message({
  folder: new Folder({ role: 'all' }),
  id: 'c',
  body: '123',
  files: [],
  accountId: TEST_ACCOUNT_ID,
});

describe('MessageStore', function() {
  describe('when the receiving focus changes from the FocusedContentStore', function() {
    beforeEach(function() {
      if (MessageStore._onFocusChangedTimer) {
        clearTimeout(MessageStore._onFocusChangedTimer);
        MessageStore._onFocusChangedTimer = null;
      }
      spyOn(MessageStore, '_onApplyFocusChange');
    });

    afterEach(function() {
      if (MessageStore._onFocusChangedTimer) {
        clearTimeout(MessageStore._onFocusChangedTimer);
        MessageStore._onFocusChangedTimer = null;
      }
    });

    describe('if no change has happened in the last 100ms', () =>
      it('should apply immediately', function() {
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange).toHaveBeenCalled();
      }));

    describe('if a change has happened in the last 100ms', function() {
      it('should not apply immediately', function() {
        const noop = () => {};
        MessageStore._onFocusChangedTimer = setTimeout(noop, 100);
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange).not.toHaveBeenCalled();
      });

      it('should apply 100ms after the last focus change and reset', function() {
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange.callCount).toBe(1);
        advanceClock(50);
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange.callCount).toBe(1);
        advanceClock(50);
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange.callCount).toBe(1);
        advanceClock(150);
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange.callCount).toBe(3);
        advanceClock(150);
        FocusedContentStore.trigger({
          impactsCollection(c) {
            return true;
          },
        });
        expect(MessageStore._onApplyFocusChange.callCount).toBe(5);
      });
    });
  });

  describe('items', function() {
    beforeEach(function() {
      MessageStore._showingHiddenItems = false;
      MessageStore._items = [
        new Message({
          folder: new Folder({ role: 'trash' }),
          labels: [new Label({ displayName: 'bla' })],
        }),
        new Message({
          folder: new Folder({ role: 'all' }),
          labels: [new Label({ role: 'inbox' })],
        }),
        new Message({
          folder: new Folder({ role: 'spam' }),
          labels: [new Label({ displayName: 'bla' })],
        }),
        new Message({ folder: new Folder({ role: 'all' }), labels: [] }),
        new Message({ folder: new Folder({ role: 'all' }), labels: [], draft: true }),
      ];
    });

    describe('when showing hidden items', () =>
      it('should return the entire items array', function() {
        MessageStore._showingHiddenItems = true;
        expect(MessageStore.items().length).toBe(5);
      }));

    describe('when in trash or spam', () =>
      it('should show only the message which are in trash or spam, and drafts', function() {
        spyOn(FocusedPerspectiveStore, 'current').andReturn({
          categoriesSharedRole: () => 'trash',
        });
        expect(MessageStore.items()).toEqual([
          MessageStore._items[0],
          MessageStore._items[2],
          MessageStore._items[4],
        ]);
      }));

    describe('when in another folder', () =>
      it('should hide all of the messages which are in trash or spam', function() {
        spyOn(FocusedPerspectiveStore, 'current').andReturn({
          categoriesSharedRole: () => 'inbox',
        });
        expect(MessageStore.items()).toEqual([
          MessageStore._items[1],
          MessageStore._items[3],
          MessageStore._items[4],
        ]);
      }));
  });

  describe('when applying focus changes', function() {
    beforeEach(function() {
      MessageStore._lastLoadedThreadId = null;

      this.focus = null;
      spyOn(FocusedContentStore, 'focused').andCallFake(collection => {
        if (collection === 'thread') {
          return this.focus;
        } else {
          return null;
        }
      });

      spyOn(FocusedContentStore, 'focusedId').andCallFake(collection => {
        if (collection === 'thread') {
          return this.focus != null ? this.focus.id : undefined;
        } else {
          return null;
        }
      });

      spyOn(DatabaseStore, 'findAll').andCallFake(function() {
        return {
          include() {
            return this;
          },
          where() {
            return this;
          },
          then(callback) {
            return callback([testMessage1, testMessage2]);
          },
        };
      });
    });

    it('should retrieve the focused thread', function() {
      this.focus = testThread;
      MessageStore._thread = null;
      MessageStore._onApplyFocusChange();
      expect(DatabaseStore.findAll).toHaveBeenCalled();
      expect(DatabaseStore.findAll.mostRecentCall.args[0]).toBe(Message);
    });

    describe('when the thread is already focused', () =>
      it('should do nothing', function() {
        this.focus = testThread;
        MessageStore._thread = this.focus;
        MessageStore._onApplyFocusChange();
        expect(DatabaseStore.findAll).not.toHaveBeenCalled();
      }));

    describe('when the thread is unread', function() {
      beforeEach(function() {
        this.focus = null;
        MessageStore._onApplyFocusChange();
        testThread.unread = true;
        spyOn(Actions, 'queueTask');
        spyOn(AppEnv.config, 'get').andCallFake(key => {
          if (key === 'core.reading.markAsReadDelay') {
            return 600;
          }
        });
      });

      it('should queue a task to mark the thread as read', function() {
        this.focus = testThread;
        MessageStore._onApplyFocusChange();
        advanceClock(500);
        expect(Actions.queueTask).not.toHaveBeenCalled();
        advanceClock(500);
        expect(Actions.queueTask).toHaveBeenCalled();
        expect(Actions.queueTask.mostRecentCall.args[0] instanceof ChangeUnreadTask).toBe(true);
      });

      it('should not queue a task to mark the thread as read if the thread is no longer selected 500msec later', function() {
        this.focus = testThread;
        MessageStore._onApplyFocusChange();
        advanceClock(500);
        expect(Actions.queueTask).not.toHaveBeenCalled();
        this.focus = null;
        MessageStore._onApplyFocusChange();
        advanceClock(500);
        expect(Actions.queueTask).not.toHaveBeenCalled();
      });

      it('should not re-mark the thread as read when made unread', function() {
        this.focus = testThread;
        testThread.unread = false;
        MessageStore._onApplyFocusChange();
        advanceClock(500);
        expect(Actions.queueTask).not.toHaveBeenCalled();

        // This simulates a DB change or some attribute changing on the
        // thread.
        testThread.unread = true;
        MessageStore._fetchFromCache();
        advanceClock(500);
        expect(Actions.queueTask).not.toHaveBeenCalled();
      });
    });
  });

  describe('when toggling expansion of all messages', function() {
    beforeEach(function() {
      MessageStore._items = [testMessage1, testMessage2, testMessage3];
      spyOn(MessageStore, '_fetchExpandedAttachments');
    });

    it('should expand all when at default state', function() {
      MessageStore._itemsExpanded = { c: 'default' };
      Actions.toggleAllMessagesExpanded();
      expect(MessageStore._itemsExpanded).toEqual({ a: 'explicit', b: 'explicit', c: 'explicit' });
    });

    it('should expand all when at least one item is collapsed', function() {
      MessageStore._itemsExpanded = { b: 'explicit', c: 'explicit' };
      Actions.toggleAllMessagesExpanded();
      expect(MessageStore._itemsExpanded).toEqual({ a: 'explicit', b: 'explicit', c: 'explicit' });
    });

    it('should collapse all except the latest message when all expanded', function() {
      MessageStore._itemsExpanded = { a: 'explicit', b: 'explicit', c: 'explicit' };
      Actions.toggleAllMessagesExpanded();
      expect(MessageStore._itemsExpanded).toEqual({ c: 'explicit' });
    });
  });
});