const { sortMenuItems } = require('../src/menu-sort-helpers');

describe('contextMenu', () => {
  describe('dedupes separators', () => {
    it('preserves existing submenus', () => {
      const items = [{ submenu: [] }];
      expect(sortMenuItems(items)).toEqual(items);
    });
  });

  describe('dedupes separators', () => {
    it('trims leading separators', () => {
      const items = [{ type: 'separator' }, { command: 'core:one' }];
      const expected = [{ command: 'core:one' }];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('preserves separators at the begining of set two', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      const expected = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('trims trailing separators', () => {
      const items = [{ command: 'core:one' }, { type: 'separator' }];
      const expected = [{ command: 'core:one' }];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('removes duplicate separators across sets', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      const expected = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });
  });

  describe('can move an item to a different group by merging groups', () => {
    it('can move a group of one item', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' },
        { type: 'separator' },
        { command: 'core:three', after: ['core:one'] },
        { type: 'separator' }
      ];
      const expected = [
        { command: 'core:one' },
        { command: 'core:three', after: ['core:one'] },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it("moves all items in the moving item's group", () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' },
        { type: 'separator' },
        { command: 'core:three', after: ['core:one'] },
        { command: 'core:four' },
        { type: 'separator' }
      ];
      const expected = [
        { command: 'core:one' },
        { command: 'core:three', after: ['core:one'] },
        { command: 'core:four' },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it("ignores positions relative to commands that don't exist", () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' },
        { type: 'separator' },
        { command: 'core:three', after: ['core:does-not-exist'] },
        { command: 'core:four', after: ['core:one'] },
        { type: 'separator' }
      ];
      const expected = [
        { command: 'core:one' },
        { command: 'core:three', after: ['core:does-not-exist'] },
        { command: 'core:four', after: ['core:one'] },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('can handle recursive group merging', () => {
      const items = [
        { command: 'core:one', after: ['core:three'] },
        { command: 'core:two', before: ['core:one'] },
        { command: 'core:three' }
      ];
      const expected = [
        { command: 'core:three' },
        { command: 'core:two', before: ['core:one'] },
        { command: 'core:one', after: ['core:three'] }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('can merge multiple groups when given a list of before/after commands', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' },
        { type: 'separator' },
        { command: 'core:three', after: ['core:one', 'core:two'] }
      ];
      const expected = [
        { command: 'core:two' },
        { command: 'core:one' },
        { command: 'core:three', after: ['core:one', 'core:two'] }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });

    it('can merge multiple groups based on both before/after commands', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' },
        { type: 'separator' },
        { command: 'core:three', after: ['core:one'], before: ['core:two'] }
      ];
      const expected = [
        { command: 'core:one' },
        { command: 'core:three', after: ['core:one'], before: ['core:two'] },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual(expected);
    });
  });

  describe('sorts items within their ultimate group', () => {
    it('does a simple sort', () => {
      const items = [
        { command: 'core:two', after: ['core:one'] },
        { command: 'core:one' }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:one' },
        { command: 'core:two', after: ['core:one'] }
      ]);
    });

    it('resolves cycles by ignoring things that conflict', () => {
      const items = [
        { command: 'core:two', after: ['core:one'] },
        { command: 'core:one', after: ['core:two'] }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:one', after: ['core:two'] },
        { command: 'core:two', after: ['core:one'] }
      ]);
    });
  });

  describe('sorts groups', () => {
    it('does a simple sort', () => {
      const items = [
        { command: 'core:two', afterGroupContaining: ['core:one'] },
        { type: 'separator' },
        { command: 'core:one' }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two', afterGroupContaining: ['core:one'] }
      ]);
    });

    it('resolves cycles by ignoring things that conflict', () => {
      const items = [
        { command: 'core:two', afterGroupContaining: ['core:one'] },
        { type: 'separator' },
        { command: 'core:one', afterGroupContaining: ['core:two'] }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:one', afterGroupContaining: ['core:two'] },
        { type: 'separator' },
        { command: 'core:two', afterGroupContaining: ['core:one'] }
      ]);
    });

    it('ignores references to commands that do not exist', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        {
          command: 'core:two',
          afterGroupContaining: ['core:does-not-exist']
        }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two', afterGroupContaining: ['core:does-not-exist'] }
      ]);
    });

    it('only respects the first matching [before|after]GroupContaining rule in a given group', () => {
      const items = [
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:three', beforeGroupContaining: ['core:one'] },
        { command: 'core:four', afterGroupContaining: ['core:two'] },
        { type: 'separator' },
        { command: 'core:two' }
      ];
      expect(sortMenuItems(items)).toEqual([
        { command: 'core:three', beforeGroupContaining: ['core:one'] },
        { command: 'core:four', afterGroupContaining: ['core:two'] },
        { type: 'separator' },
        { command: 'core:one' },
        { type: 'separator' },
        { command: 'core:two' }
      ]);
    });
  });
});
