/**
 * @license
 * Copyright 2025 Vybestack LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect } from 'vitest';
/**
 * Test for upstream commit b1258dd5 - Context overflow prompt race condition fix.
 *
 * Race condition: When onCancelSubmit(true) is called before inputHistoryStore.inputHistory
 * has been updated with the latest user message, the wrong prompt gets restored.
 *
 * Fix: Use pendingRestorePrompt state to defer restoration until inputHistory syncs.
 *
 * This is a simplified unit test that verifies the race condition logic without
 * full component rendering.
 */
describe('AppContainer - Cancel/Restore Prompt Race Condition (b1258dd5)', () => {
    it('demonstrates the race condition without the fix', () => {
        // Simulate the state WITHOUT the fix (immediate restoration)
        let inputHistory = ['old prompt'];
        let restoredPrompt = null;
        // Simulate cancelHandler that restores immediately
        const cancelHandler = (shouldRestore) => {
            if (shouldRestore) {
                // BUG: This reads the OLD state because inputHistory hasn't updated yet
                restoredPrompt = inputHistory[inputHistory.length - 1];
            }
        };
        // Simulate onCancelSubmit calling cancelHandler immediately
        const onCancelSubmit = (shouldRestore) => {
            if (shouldRestore) {
                cancelHandler(true); // IMMEDIATE call - reads stale state
            }
        };
        // User submits new prompt - state updates asynchronously in real React
        // But onCancelSubmit is called BEFORE state updates
        onCancelSubmit(true);
        // State updates AFTER the cancel call (simulating React async state)
        inputHistory = ['old prompt', 'new prompt'];
        // Verify the bug: restored the wrong (old) prompt
        expect(restoredPrompt).toBe('old prompt'); // WRONG!
        // Expected: 'new prompt'
    });
    it('verifies the fix using pendingRestorePrompt deferred pattern', () => {
        // Simulate the state WITH the fix (deferred restoration)
        let inputHistory = ['old prompt'];
        let restoredPrompt = null;
        let pendingRestorePrompt = false;
        // Simulate cancelHandler
        const cancelHandler = (shouldRestore) => {
            if (shouldRestore) {
                restoredPrompt = inputHistory[inputHistory.length - 1];
            }
        };
        // Simulate onCancelSubmit with FIX: defer restoration
        const onCancelSubmit = (shouldRestore) => {
            if (shouldRestore) {
                pendingRestorePrompt = true; // DEFER instead of immediate call
            }
            else {
                cancelHandler(false);
            }
        };
        // Simulate useEffect that monitors pendingRestorePrompt
        const checkAndRestore = () => {
            if (pendingRestorePrompt) {
                cancelHandler(true); // Now reads CURRENT state
                pendingRestorePrompt = false;
            }
        };
        // User submits new prompt
        onCancelSubmit(true);
        // At this point, restoration is pending but not executed
        expect(restoredPrompt).toBeNull();
        expect(pendingRestorePrompt).toBe(true);
        // State updates (simulating React state sync)
        inputHistory = ['old prompt', 'new prompt'];
        // useEffect runs after state sync
        checkAndRestore();
        // Verify the fix: restored the correct (new) prompt
        expect(restoredPrompt).toBe('new prompt'); // CORRECT!
        expect(pendingRestorePrompt).toBe(false);
    });
    it('calls cancelHandler immediately when shouldRestorePrompt is false', () => {
        let cancelCalled = false;
        let pendingRestorePrompt = false;
        const cancelHandler = () => {
            cancelCalled = true;
        };
        const onCancelSubmit = (shouldRestore) => {
            if (shouldRestore) {
                pendingRestorePrompt = true;
            }
            else {
                cancelHandler(); // Immediate call for false
            }
        };
        onCancelSubmit(false);
        // Should call immediately, not defer
        expect(cancelCalled).toBe(true);
        expect(pendingRestorePrompt).toBe(false);
    });
});
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