import { describe, test, expect, jest, beforeEach } from '@jest/globals';

// Mock the dependencies
jest.mock('../utils/logger.js', () => ({
  Logger: {
    log: jest.fn(),
    info: jest.fn(),
    debug: jest.fn(),
    warn: jest.fn(),
    error: jest.fn(),
  },
}));

jest.mock('../utils/events.js', () => ({
  default: jest.fn(),
}));

// Since we can't import the actual WindowContainer that depends on GNOME APIs,
// we'll test the logic patterns used in the container

describe('Container Logic Tests', () => {
  describe('Orientation Toggle Logic', () => {
    enum Layout {
      HORIZONTAL = 0,
      VERTICAL = 1,
      TABBED = 2,
    }

    const toggleOrientation = (current: Layout): Layout => {
      if (current === Layout.TABBED) return Layout.HORIZONTAL;
      return current === Layout.HORIZONTAL
        ? Layout.VERTICAL
        : Layout.HORIZONTAL;
    };

    test('should toggle from HORIZONTAL to VERTICAL', () => {
      const result = toggleOrientation(Layout.HORIZONTAL);
      expect(result).toBe(Layout.VERTICAL);
    });

    test('should toggle from VERTICAL to HORIZONTAL', () => {
      const result = toggleOrientation(Layout.VERTICAL);
      expect(result).toBe(Layout.HORIZONTAL);
    });

    test('should toggle from TABBED to HORIZONTAL', () => {
      const result = toggleOrientation(Layout.TABBED);
      expect(result).toBe(Layout.HORIZONTAL);
    });

    test('enum reverse mapping should return string names', () => {
      expect(Layout[Layout.HORIZONTAL]).toBe('HORIZONTAL');
      expect(Layout[Layout.VERTICAL]).toBe('VERTICAL');
      expect(Layout[Layout.TABBED]).toBe('TABBED');
    });
  });

  describe('Window Bounds Calculation', () => {
    test('should calculate horizontal bounds correctly', () => {
      const workArea = { x: 0, y: 0, width: 1000, height: 500 };
      const itemCount = 3;
      const windowWidth = Math.floor(workArea.width / itemCount);

      const bounds = Array.from({ length: itemCount }, (_, index) => ({
        x: workArea.x + (index * windowWidth),
        y: workArea.y,
        width: windowWidth,
        height: workArea.height,
      }));

      expect(bounds.length).toBe(3);
      expect(bounds[0].x).toBe(0);
      expect(bounds[1].x).toBe(333);
      expect(bounds[2].x).toBe(666);
      expect(bounds[0].width).toBe(333);
    });

    test('should calculate vertical bounds correctly', () => {
      const workArea = { x: 0, y: 0, width: 1000, height: 900 };
      const itemCount = 3;
      const windowHeight = Math.floor(workArea.height / itemCount);

      const bounds = Array.from({ length: itemCount }, (_, index) => ({
        x: workArea.x,
        y: workArea.y + (index * windowHeight),
        width: workArea.width,
        height: windowHeight,
      }));

      expect(bounds.length).toBe(3);
      expect(bounds[0].y).toBe(0);
      expect(bounds[1].y).toBe(300);
      expect(bounds[2].y).toBe(600);
      expect(bounds[0].height).toBe(300);
    });

    test('should handle single window bounds', () => {
      const workArea = { x: 100, y: 50, width: 800, height: 600 };
      const itemCount = 1;
      const windowWidth = Math.floor(workArea.width / itemCount);

      const bounds = [{
        x: workArea.x,
        y: workArea.y,
        width: windowWidth,
        height: workArea.height,
      }];

      expect(bounds[0].x).toBe(100);
      expect(bounds[0].y).toBe(50);
      expect(bounds[0].width).toBe(800);
      expect(bounds[0].height).toBe(600);
    });
  });

  describe('Tabbed Bounds Calculation', () => {
    const TAB_BAR_HEIGHT = 24;

    test('should give all items the same content rect in tabbed mode', () => {
      const workArea = { x: 100, y: 0, width: 1000, height: 500 };
      const itemCount = 3;

      const contentRect = {
        x: workArea.x,
        y: workArea.y + TAB_BAR_HEIGHT,
        width: workArea.width,
        height: workArea.height - TAB_BAR_HEIGHT,
      };

      const bounds = Array.from({ length: itemCount }, () => contentRect);

      expect(bounds.length).toBe(3);
      // All bounds should be identical
      bounds.forEach(b => {
        expect(b.x).toBe(100);
        expect(b.y).toBe(TAB_BAR_HEIGHT);
        expect(b.width).toBe(1000);
        expect(b.height).toBe(500 - TAB_BAR_HEIGHT);
      });
    });

    test('tab bar rect should occupy top of work area', () => {
      const workArea = { x: 200, y: 50, width: 800, height: 600 };

      const tabBarRect = {
        x: workArea.x,
        y: workArea.y,
        width: workArea.width,
        height: TAB_BAR_HEIGHT,
      };

      expect(tabBarRect.x).toBe(200);
      expect(tabBarRect.y).toBe(50);
      expect(tabBarRect.width).toBe(800);
      expect(tabBarRect.height).toBe(TAB_BAR_HEIGHT);
    });

    test('active tab index should clamp after removal', () => {
      let activeTabIndex = 2;
      const itemCount = 2; // after removing one from 3

      if (activeTabIndex >= itemCount) {
        activeTabIndex = itemCount - 1;
      }

      expect(activeTabIndex).toBe(1);
    });

    test('active tab index should stay at 0 when first item removed', () => {
      let activeTabIndex = 0;
      const itemCount = 2; // after removing one from 3

      if (activeTabIndex >= itemCount) {
        activeTabIndex = itemCount - 1;
      }

      expect(activeTabIndex).toBe(0);
    });
  });

  describe('Window Index Finding', () => {
    test('should find window index in array', () => {
      const windows = [
        { id: 1, title: 'Window 1' },
        { id: 2, title: 'Window 2' },
        { id: 3, title: 'Window 3' },
      ];

      const findIndex = (id: number) => {
        for (let i = 0; i < windows.length; i++) {
          if (windows[i].id === id) {
            return i;
          }
        }
        return -1;
      };

      expect(findIndex(2)).toBe(1);
      expect(findIndex(3)).toBe(2);
      expect(findIndex(999)).toBe(-1);
    });

    test('should safely remove window by index', () => {
      const windows = [
        { id: 1, title: 'Window 1' },
        { id: 2, title: 'Window 2' },
        { id: 3, title: 'Window 3' },
      ];

      const removeWindow = (id: number) => {
        const index = windows.findIndex(w => w.id === id);
        if (index !== -1) {
          windows.splice(index, 1);
          return true;
        }
        return false;
      };

      const removed = removeWindow(2);
      expect(removed).toBe(true);
      expect(windows.length).toBe(2);
      expect(windows.find(w => w.id === 2)).toBeUndefined();
    });
  });

  describe('Container Item Reordering', () => {
    test('should reorder items correctly', () => {
      const items = ['A', 'B', 'C', 'D'];
      const originalIndex = 1; // 'B'
      const newIndex = 3;

      // Remove from original position and insert at new position
      const [item] = items.splice(originalIndex, 1);
      items.splice(newIndex, 0, item);

      expect(items).toEqual(['A', 'C', 'D', 'B']);
    });

    test('should handle reordering to same position', () => {
      const items = ['A', 'B', 'C'];
      const originalIndex = 1;
      const newIndex = 1;

      if (originalIndex !== newIndex) {
        const [item] = items.splice(originalIndex, 1);
        items.splice(newIndex, 0, item);
      }

      expect(items).toEqual(['A', 'B', 'C']);
    });

    test('should handle moving first item to last', () => {
      const items = ['A', 'B', 'C'];
      const [item] = items.splice(0, 1);
      items.splice(2, 0, item);

      expect(items).toEqual(['B', 'C', 'A']);
    });
  });
});