/**
 * Unit tests for OpenCodeCellActions DOM rendering and button disabled states.
 *
 * Mocks @jupyterlab/cells, @jupyterlab/apputils, and @lumino/widgets at the
 * test boundary so the real ESM packages are not loaded (Jest + pnpm can't
 * transform the hoisted @jupyterlab/* packages out of the box).
 */
jest.mock('@jupyterlab/cells', () => ({
  CodeCell: class CodeCell {}
}));

jest.mock('@jupyterlab/apputils', () => ({
  Notification: {
    info: jest.fn(),
    error: jest.fn(),
    success: jest.fn(),
    warning: jest.fn()
  }
}));

jest.mock('@lumino/widgets', () => {
  class Widget {
    public node: HTMLElement = document.createElement('div');
    public id = '';
    public parent: Widget | null = null;
    private _isDisposed = false;
    public get isDisposed(): boolean {
      return this._isDisposed;
    }
    public addClass(cls: string): void {
      this.node.classList.add(cls);
    }
    public dispose(): void {
      this._isDisposed = true;
    }
  }
  return { Widget };
});

import { OpenCodeCellActions } from '../components/opencode_cell_actions';
import { CodeCell } from '@jupyterlab/cells';

function makeFakeOutputs(items: any[]): any {
  return {
    get length() {
      return items.length;
    },
    get(i: number) {
      return items[i];
    }
  };
}

function makeFakeCell(
  source: string,
  errorOutputs: any[] = [],
  notebookPath = 'foo.ipynb',
  cellIndex = 0,
  totalCells = 1
): CodeCell {
  const model: any = {
    id: 'cell-test',
    type: 'code',
    sharedModel: {
      getSource: () => source
    },
    outputs: makeFakeOutputs(errorOutputs),
    contentChanged: { connect: jest.fn(), disconnect: jest.fn() },
    stateChanged: { connect: jest.fn(), disconnect: jest.fn() }
  };
  const cell = new (CodeCell as unknown as new () => CodeCell)();
  (cell as any).model = model;

  // Parent chain: cell -> notebook -> panel (mirrors real JupyterLab, where
  // the cell's grandparent Notebook matches the duck-typed panel lookup).
  const notebook: any = { widgets: [] as CodeCell[] };
  const panel: any = {
    context: { path: notebookPath },
    content: notebook
  };
  for (let i = 0; i < cellIndex; i++) {
    notebook.widgets.push({
      model: { sharedModel: { getSource: () => '' } }
    } as any);
  }
  notebook.widgets.push(cell);
  for (let i = cellIndex + 1; i < totalCells; i++) {
    notebook.widgets.push({
      model: { sharedModel: { getSource: () => '' } }
    } as any);
  }

  Object.defineProperty(cell, 'parent', {
    value: notebook,
    configurable: true
  });
  Object.defineProperty(notebook, 'parent', {
    value: panel,
    configurable: true
  });

  return cell as CodeCell;
}

describe('OpenCodeCellActions', () => {
  it('renders 3 buttons with the expected labels', () => {
    const cell = makeFakeCell('x = 1');
    const actions = new OpenCodeCellActions(cell);
    const btns = actions.node.querySelectorAll('button');
    expect(btns.length).toBe(3);
    expect(btns[0].textContent).toBe('✨ 优化');
    expect(btns[1].textContent).toBe('🐛 排错');
    expect(btns[2].textContent).toBe('🪄 编辑');
  });

  it('disables all buttons when the notebook panel cannot be resolved', () => {
    const cell = new (CodeCell as unknown as new () => CodeCell)();
    (cell as any).model = {
      id: 'orphan',
      type: 'code',
      sharedModel: { getSource: () => 'x = 1' },
      outputs: makeFakeOutputs([]),
      contentChanged: { connect: jest.fn(), disconnect: jest.fn() },
      stateChanged: { connect: jest.fn(), disconnect: jest.fn() }
    };
    // No parent chain: extractCellContextFromCell must return null.
    const actions = new OpenCodeCellActions(cell);
    const btns = actions.node.querySelectorAll('button');
    btns.forEach((b: HTMLButtonElement) => {
      expect(b.disabled).toBe(true);
    });
  });

  it('enables optimize and edit; fix stays disabled without an error', () => {
    const cell = makeFakeCell('x = 1', [], 'foo.ipynb', 0, 1);
    const actions = new OpenCodeCellActions(cell);
    const btns = actions.node.querySelectorAll('button');
    expect((btns[0] as HTMLButtonElement).disabled).toBe(false);
    expect((btns[1] as HTMLButtonElement).disabled).toBe(true);
    expect((btns[2] as HTMLButtonElement).disabled).toBe(false);
  });

  it('enables the fix button when the cell has an error output', () => {
    const cell = makeFakeCell(
      '1/0',
      [
        {
          type: 'error',
          ename: 'ZeroDivisionError',
          evalue: 'div by zero',
          traceback: []
        }
      ],
      'foo.ipynb',
      0,
      1
    );
    const actions = new OpenCodeCellActions(cell);
    const btns = actions.node.querySelectorAll('button');
    expect((btns[1] as HTMLButtonElement).disabled).toBe(false);
  });

  it('disconnects model signals on dispose', () => {
    const cell = makeFakeCell('x = 1');
    const actions = new OpenCodeCellActions(cell);
    actions.dispose();
    const model = (cell as any).model;
    expect(model.contentChanged.disconnect).toHaveBeenCalled();
    expect(model.stateChanged.disconnect).toHaveBeenCalled();
  });
});