import type { MutableRefObject } from 'react';
import type { ActionSet, ActionDefinition } from '../types';

/**
 * Bridge type that TilingWorkspace writes into and the ActionSet reads from.
 */
export interface TilingHandle {
  splitRight(): void;
  splitDown(): void;
  newTab(): void;
  closeActiveTab(): void;
  nextTab(): void;
  prevTab(): void;
}

/**
 * ActionSet for tiling workspace actions.
 *
 * The handle is populated by TilingWorkspace via a ref bridge so the
 * ActionSet can trigger splits without owning tiling state.
 */
export class TilingActionSet implements ActionSet {
  readonly id = 'tiling';

  constructor(private handleRef: MutableRefObject<TilingHandle | null>) {}

  getActions(): ActionDefinition[] {
    return [
      {
        id: 'split-right',
        name: 'Split view to the right',
        description: 'Split the active tile vertically',
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.splitRight(),
      },
      {
        id: 'split-down',
        name: 'Split view down',
        description: 'Split the active tile horizontally',
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.splitDown(),
      },
      {
        id: 'new-tab',
        name: 'New tab',
        description: 'Open a new tab in the active tile',
        hotkeys: [{ modifiers: ['Mod'], key: 't' }],
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.newTab(),
      },
      {
        id: 'close-tab',
        name: 'Close tab',
        description: 'Close the active tab in the active tile',
        // Mod+W is reserved by the native window menu (Close Window), so the
        // default binding is left to the command palette / tab close button.
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.closeActiveTab(),
      },
      {
        id: 'next-tab',
        name: 'Next tab',
        description: 'Activate the next tab in the active tile',
        hotkeys: [{ modifiers: ['Mod', 'Alt'], key: 'ArrowRight' }],
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.nextTab(),
      },
      {
        id: 'prev-tab',
        name: 'Previous tab',
        description: 'Activate the previous tab in the active tile',
        hotkeys: [{ modifiers: ['Mod', 'Alt'], key: 'ArrowLeft' }],
        checkAvailable: () => this.handleRef.current !== null,
        execute: () => this.handleRef.current?.prevTab(),
      },
    ];
  }
}