/**
 * @license
 * Copyright 2025 Vybestack LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/** @vitest-environment jsdom */
import { describe, it, expect } from 'vitest';
import { renderHook, act } from '@testing-library/react';
import { useReverseSearchCompletion } from './useReverseSearchCompletion.js';
import { useTextBuffer } from '../components/shared/text-buffer.js';
describe('useReverseSearchCompletion', () => {
    function useTextBufferForTest(text) {
        return useTextBuffer({
            initialText: text,
            initialCursorOffset: text.length,
            viewport: { width: 80, height: 20 },
            isValidPath: () => false,
            onChange: () => { },
        });
    }
    describe('Core Hook Behavior', () => {
        describe('State Management', () => {
            it('should initialize with default state', () => {
                const mockShellHistory = ['echo hello'];
                const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest(''), mockShellHistory, false));
                expect(result.current.suggestions).toEqual([]);
                expect(result.current.activeSuggestionIndex).toBe(-1);
                expect(result.current.visibleStartIndex).toBe(0);
                expect(result.current.showSuggestions).toBe(false);
                expect(result.current.isLoadingSuggestions).toBe(false);
            });
            it('should reset state when reverseSearchActive becomes false', () => {
                const mockShellHistory = ['echo hello'];
                const { result, rerender } = renderHook(({ text, active }) => {
                    const textBuffer = useTextBufferForTest(text);
                    return useReverseSearchCompletion(textBuffer, mockShellHistory, active);
                }, { initialProps: { text: 'echo', active: true } });
                // Simulate reverseSearchActive becoming false
                rerender({ text: 'echo', active: false });
                expect(result.current.suggestions).toEqual([]);
                expect(result.current.activeSuggestionIndex).toBe(-1);
                expect(result.current.visibleStartIndex).toBe(0);
                expect(result.current.showSuggestions).toBe(false);
            });
            describe('Navigation', () => {
                it('should handle navigateUp with no suggestions', () => {
                    const mockShellHistory = ['echo hello'];
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('grep'), mockShellHistory, true));
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(-1);
                });
                it('should handle navigateDown with no suggestions', () => {
                    const mockShellHistory = ['echo hello'];
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('grep'), mockShellHistory, true));
                    act(() => {
                        result.current.navigateDown();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(-1);
                });
                it('should navigate up through suggestions with wrap-around', () => {
                    const mockShellHistory = [
                        'ls -l',
                        'ls -la',
                        'cd /some/path',
                        'git status',
                        'echo "Hello, World!"',
                        'echo Hi',
                    ];
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('echo'), mockShellHistory, true));
                    expect(result.current.suggestions.length).toBe(2);
                    expect(result.current.activeSuggestionIndex).toBe(0);
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(1);
                });
                it('should navigate down through suggestions with wrap-around', () => {
                    const mockShellHistory = [
                        'ls -l',
                        'ls -la',
                        'cd /some/path',
                        'git status',
                        'echo "Hello, World!"',
                        'echo Hi',
                    ];
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('ls'), mockShellHistory, true));
                    expect(result.current.suggestions.length).toBe(2);
                    expect(result.current.activeSuggestionIndex).toBe(0);
                    act(() => {
                        result.current.navigateDown();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(1);
                });
                it('should handle navigation with multiple suggestions', () => {
                    const mockShellHistory = [
                        'ls -l',
                        'ls -la',
                        'cd /some/path/l',
                        'git status',
                        'echo "Hello, World!"',
                        'echo "Hi all"',
                    ];
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('l'), mockShellHistory, true));
                    expect(result.current.suggestions.length).toBe(5);
                    expect(result.current.activeSuggestionIndex).toBe(0);
                    act(() => {
                        result.current.navigateDown();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(1);
                    act(() => {
                        result.current.navigateDown();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(2);
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(1);
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(0);
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(4);
                });
                it('should handle navigation with large suggestion lists and scrolling', () => {
                    const largeMockCommands = Array.from({ length: 15 }, (_, i) => `echo ${i}`);
                    const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('echo'), largeMockCommands, true));
                    expect(result.current.suggestions.length).toBe(15);
                    expect(result.current.activeSuggestionIndex).toBe(0);
                    expect(result.current.visibleStartIndex).toBe(0);
                    act(() => {
                        result.current.navigateUp();
                    });
                    expect(result.current.activeSuggestionIndex).toBe(14);
                    expect(result.current.visibleStartIndex).toBe(Math.max(0, 15 - 8));
                });
            });
        });
    });
    describe('Filtering', () => {
        it('filters history by buffer.text and sets showSuggestions', () => {
            const history = ['foo', 'barfoo', 'baz'];
            const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('foo'), history, true));
            // should only return the two entries containing "foo"
            expect(result.current.suggestions.map((s) => s.value)).toEqual([
                'foo',
                'barfoo',
            ]);
            expect(result.current.showSuggestions).toBe(true);
        });
        it('hides suggestions when there are no matches', () => {
            const history = ['alpha', 'beta'];
            const { result } = renderHook(() => useReverseSearchCompletion(useTextBufferForTest('γ'), history, true));
            expect(result.current.suggestions).toEqual([]);
            expect(result.current.showSuggestions).toBe(false);
        });
    });
});
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