/**
 * DailyNotificationRollingWindowTest.java
 * 
 * Unit tests for rolling window safety functionality
 * Tests window maintenance, capacity management, and platform-specific limits
 * 
 * @author Matthew Raymer
 * @version 1.0.0
 */

package com.timesafari.dailynotification;

import android.content.Context;
import android.test.AndroidTestCase;
import android.test.mock.MockContext;

import java.util.concurrent.TimeUnit;

/**
 * Unit tests for DailyNotificationRollingWindow
 * 
 * Tests the rolling window safety functionality including:
 * - Window maintenance and state updates
 * - Capacity limit enforcement
 * - Platform-specific behavior (iOS vs Android)
 * - Statistics and maintenance timing
 */
public class DailyNotificationRollingWindowTest extends AndroidTestCase {
    
    private DailyNotificationRollingWindow rollingWindow;
    private Context mockContext;
    private DailyNotificationScheduler mockScheduler;
    private DailyNotificationTTLEnforcer mockTTLEnforcer;
    private DailyNotificationStorage mockStorage;
    
    @Override
    protected void setUp() throws Exception {
        super.setUp();
        
        // Create mock context
        mockContext = new MockContext() {
            @Override
            public android.content.SharedPreferences getSharedPreferences(String name, int mode) {
                return getContext().getSharedPreferences(name, mode);
            }
        };
        
        // Create mock components
        mockScheduler = new MockDailyNotificationScheduler();
        mockTTLEnforcer = new MockDailyNotificationTTLEnforcer();
        mockStorage = new MockDailyNotificationStorage();
        
        // Create rolling window for Android platform
        rollingWindow = new DailyNotificationRollingWindow(
            mockContext, 
            mockScheduler, 
            mockTTLEnforcer, 
            mockStorage, 
            false // Android platform
        );
    }
    
    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }
    
    /**
     * Test rolling window initialization
     */
    public void testRollingWindowInitialization() {
        assertNotNull("Rolling window should be initialized", rollingWindow);
        
        // Test Android platform limits
        String stats = rollingWindow.getRollingWindowStats();
        assertNotNull("Stats should not be null", stats);
        assertTrue("Stats should contain Android platform info", stats.contains("Android"));
    }
    
    /**
     * Test rolling window maintenance
     */
    public void testRollingWindowMaintenance() {
        // Test that maintenance can be forced
        rollingWindow.forceMaintenance();
        
        // Test maintenance timing
        assertFalse("Maintenance should not be needed immediately after forcing", 
            rollingWindow.isMaintenanceNeeded());
        
        // Test time until next maintenance
        long timeUntilNext = rollingWindow.getTimeUntilNextMaintenance();
        assertTrue("Time until next maintenance should be positive", timeUntilNext > 0);
    }
    
    /**
     * Test iOS platform behavior
     */
    public void testIOSPlatformBehavior() {
        // Create rolling window for iOS platform
        DailyNotificationRollingWindow iosRollingWindow = new DailyNotificationRollingWindow(
            mockContext, 
            mockScheduler, 
            mockTTLEnforcer, 
            mockStorage, 
            true // iOS platform
        );
        
        String stats = iosRollingWindow.getRollingWindowStats();
        assertNotNull("iOS stats should not be null", stats);
        assertTrue("Stats should contain iOS platform info", stats.contains("iOS"));
    }
    
    /**
     * Test maintenance timing
     */
    public void testMaintenanceTiming() {
        // Initially, maintenance should not be needed
        assertFalse("Maintenance should not be needed initially", 
            rollingWindow.isMaintenanceNeeded());
        
        // Force maintenance
        rollingWindow.forceMaintenance();
        
        // Should not be needed immediately after
        assertFalse("Maintenance should not be needed after forcing", 
            rollingWindow.isMaintenanceNeeded());
    }
    
    /**
     * Test statistics retrieval
     */
    public void testStatisticsRetrieval() {
        String stats = rollingWindow.getRollingWindowStats();
        
        assertNotNull("Statistics should not be null", stats);
        assertTrue("Statistics should contain pending count", stats.contains("pending"));
        assertTrue("Statistics should contain daily count", stats.contains("daily"));
        assertTrue("Statistics should contain platform info", stats.contains("platform"));
    }
    
    /**
     * Test error handling
     */
    public void testErrorHandling() {
        // Test with null components (should not crash)
        try {
            DailyNotificationRollingWindow errorWindow = new DailyNotificationRollingWindow(
                null, null, null, null, false
            );
            // Should not crash during construction
        } catch (Exception e) {
            // Expected to handle gracefully
        }
    }
    
    /**
     * Mock DailyNotificationScheduler for testing
     */
    private static class MockDailyNotificationScheduler extends DailyNotificationScheduler {
        public MockDailyNotificationScheduler() {
            super(null, null);
        }
        
        @Override
        public boolean scheduleNotification(NotificationContent content) {
            return true; // Always succeed for testing
        }
    }
    
    /**
     * Mock DailyNotificationTTLEnforcer for testing
     */
    private static class MockDailyNotificationTTLEnforcer extends DailyNotificationTTLEnforcer {
        public MockDailyNotificationTTLEnforcer() {
            super(null, null, false);
        }
        
        @Override
        public boolean validateBeforeArming(NotificationContent content) {
            return true; // Always pass validation for testing
        }
    }
    
    /**
     * Mock DailyNotificationStorage for testing
     */
    private static class MockDailyNotificationStorage extends DailyNotificationStorage {
        public MockDailyNotificationStorage() {
            super(null);
        }
    }
}