/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { describe, it, expect } from 'vitest';
import type { KeyBindingConfig } from './keyBindings.js';
import {
  Command,
  commandCategories,
  commandDescriptions,
  defaultKeyBindings,
} from './keyBindings.js';

describe('keyBindings config', () => {
  describe('defaultKeyBindings', () => {
    it('should have bindings for all commands', () => {
      const commands = Object.values(Command);

      for (const command of commands) {
        expect(defaultKeyBindings[command]).toBeDefined();
        expect(Array.isArray(defaultKeyBindings[command])).toBe(true);
        expect(defaultKeyBindings[command]?.length).toBeGreaterThan(0);
      }
    });

    it('should have valid key binding structures', () => {
      for (const [_, bindings] of Object.entries(defaultKeyBindings)) {
        for (const binding of bindings) {
          // Each binding must have a key name
          expect(typeof binding.key).toBe('string');
          expect(binding.key.length).toBeGreaterThan(0);

          // Modifier properties should be boolean or undefined
          if (binding.shift !== undefined) {
            expect(typeof binding.shift).toBe('boolean');
          }
          if (binding.alt !== undefined) {
            expect(typeof binding.alt).toBe('boolean');
          }
          if (binding.ctrl !== undefined) {
            expect(typeof binding.ctrl).toBe('boolean');
          }
          if (binding.cmd !== undefined) {
            expect(typeof binding.cmd).toBe('boolean');
          }
        }
      }
    });

    it('should export all required types', () => {
      // Basic type checks
      expect(typeof Command.HOME).toBe('string');
      expect(typeof Command.END).toBe('string');

      // Config should be readonly
      const config: KeyBindingConfig = defaultKeyBindings;
      expect(config[Command.HOME]).toBeDefined();
    });

    it('should have correct specific bindings', () => {
      // Verify navigation ignores shift
      const navUp = defaultKeyBindings[Command.NAVIGATION_UP];
      expect(navUp).toContainEqual({ key: 'up', shift: false });

      const navDown = defaultKeyBindings[Command.NAVIGATION_DOWN];
      expect(navDown).toContainEqual({ key: 'down', shift: false });

      // Verify dialog navigation
      const dialogNavUp = defaultKeyBindings[Command.DIALOG_NAVIGATION_UP];
      expect(dialogNavUp).toContainEqual({ key: 'up', shift: false });
      expect(dialogNavUp).toContainEqual({ key: 'k', shift: false });

      const dialogNavDown = defaultKeyBindings[Command.DIALOG_NAVIGATION_DOWN];
      expect(dialogNavDown).toContainEqual({ key: 'down', shift: false });
      expect(dialogNavDown).toContainEqual({ key: 'j', shift: false });

      // Verify physical home/end keys for cursor movement
      expect(defaultKeyBindings[Command.HOME]).toContainEqual({
        key: 'home',
        ctrl: false,
        shift: false,
      });
      expect(defaultKeyBindings[Command.END]).toContainEqual({
        key: 'end',
        ctrl: false,
        shift: false,
      });

      // Verify physical home/end keys for scrolling
      expect(defaultKeyBindings[Command.SCROLL_HOME]).toContainEqual({
        key: 'home',
        ctrl: true,
      });
      expect(defaultKeyBindings[Command.SCROLL_END]).toContainEqual({
        key: 'end',
        ctrl: true,
      });
    });
  });

  describe('command metadata', () => {
    const commandValues = Object.values(Command);

    it('has a description entry for every command', () => {
      const describedCommands = Object.keys(commandDescriptions);
      expect(describedCommands.sort()).toEqual([...commandValues].sort());

      for (const command of commandValues) {
        expect(typeof commandDescriptions[command]).toBe('string');
        expect(commandDescriptions[command]?.trim()).not.toHaveLength(0);
      }
    });

    it('categorizes each command exactly once', () => {
      const seen = new Set<Command>();

      for (const category of commandCategories) {
        expect(typeof category.title).toBe('string');
        expect(Array.isArray(category.commands)).toBe(true);

        for (const command of category.commands) {
          expect(commandValues).toContain(command);
          expect(seen.has(command)).toBe(false);
          seen.add(command);
        }
      }

      expect(seen.size).toBe(commandValues.length);
    });
  });
});