/**
 * Basic Usage Example - FunctionalHarness
 * 
 * @description Demonstrates basic usage of the FunctionalHarness with
 * state management, versioning, and command processing.
 */

// Import the harness components
import { FunctionalHarness } from '../core/harness.js';

// Sample script that uses ..listen and ..emit
const sampleScript = `
/* Sample script demonstrating ..listen and ..emit */

/* Get current state */
current_state : ..listen;

/* Process the state */
processed_data : when current_state is
    { status: "active" } then { result: "active_processed", data: current_state }
    { status: "inactive" } then { result: "inactive_processed", data: current_state }
    _ then { result: "unknown_processed", data: current_state };

/* Emit the processed data */
..emit processed_data;

/* Emit a status update */
..emit { action: "status_update", timestamp: 1234567890 };
`;

async function runBasicExample() {
    console.log('=== Basic Harness Usage Example ===\n');

    // Create harness with script content
    const harness = new FunctionalHarness(sampleScript, {
        logStateChanges: true,
        logCommands: true
    });

    // Initial state
    const initialState = {
        status: "active",
        user: { name: "Alice", score: 100 },
        settings: { theme: "dark" }
    };

    console.log('1. Processing initial state...');
    const result1 = await harness.processState(initialState);
    console.log('Result:', JSON.stringify(result1, null, 2));

    console.log('\n2. Processing state change...');
    const newState = {
        status: "inactive",
        user: { name: "Alice", score: 150 },
        settings: { theme: "light" }
    };
    const result2 = await harness.processState(newState);
    console.log('Result:', JSON.stringify(result2, null, 2));

    console.log('\n3. Version history...');
    const history = harness.getVersionHistory();
    console.log('History:', JSON.stringify(history, null, 2));

    console.log('\n4. State diff...');
    const diff = harness.stateHistory.getDiff(1, 2);
    console.log('Diff:', JSON.stringify(diff, null, 2));

    console.log('\n=== Example Complete ===');
}

// Run the example
runBasicExample().catch(console.error);

export { runBasicExample };