/**
 * Memory Management Tests
 * Tests DOM cache invalidation, event listener cleanup, and debug log management
 */

describe('DOM Cache Invalidation', () => {
    test('clearDomCache sets all jQuery references to null', () => {
        // Simulate the clearDomCache logic
        const domCache = {
            $panelContainer: { isPanel: true },
            $userStatsContainer: { isStats: true },
            $infoBoxContainer: { isInfoBox: true },
            $thoughtsContainer: { isThoughts: true },
            $inventoryContainer: { isInventory: true },
            $questsContainer: { isQuests: true },
            $musicPlayerContainer: { isMusic: true },
            $equipmentContainer: { isEquipment: true }
        };

        // Simulate clearDomCache
        domCache.$panelContainer = null;
        domCache.$userStatsContainer = null;
        domCache.$infoBoxContainer = null;
        domCache.$thoughtsContainer = null;
        domCache.$inventoryContainer = null;
        domCache.$questsContainer = null;
        domCache.$musicPlayerContainer = null;
        domCache.$equipmentContainer = null;

        // Verify all are null
        expect(domCache.$panelContainer).toBeNull();
        expect(domCache.$userStatsContainer).toBeNull();
        expect(domCache.$infoBoxContainer).toBeNull();
        expect(domCache.$thoughtsContainer).toBeNull();
        expect(domCache.$inventoryContainer).toBeNull();
        expect(domCache.$questsContainer).toBeNull();
        expect(domCache.$musicPlayerContainer).toBeNull();
        expect(domCache.$equipmentContainer).toBeNull();
    });

    test('clearDomCache is idempotent (safe to call multiple times)', () => {
        const cache = { $panelContainer: null };

        // Call clear twice - should not throw
        cache.$panelContainer = null;
        cache.$panelContainer = null;

        expect(cache.$panelContainer).toBeNull();
    });
});

describe('Debug Log Memory Management', () => {
    test('debugLogs array is capped at 100 entries', () => {
        const debugLogs = [];
        const MAX_LOGS = 100;

        // Add 150 entries
        for (let i = 0; i < 150; i++) {
            debugLogs.push({ timestamp: new Date().toISOString(), message: `Log ${i}` });
            if (debugLogs.length > MAX_LOGS) {
                debugLogs.shift();
            }
        }

        expect(debugLogs.length).toBe(100);
        expect(debugLogs[0].message).toBe('Log 50'); // First 50 were shifted out
        expect(debugLogs[99].message).toBe('Log 149');
    });

    test('clearDebugLogs empties the array', () => {
        const debugLogs = [
            { timestamp: '2024-01-01T00:00:00Z', message: 'Log 1' },
            { timestamp: '2024-01-01T00:00:01Z', message: 'Log 2' },
            { timestamp: '2024-01-01T00:00:02Z', message: 'Log 3' }
        ];

        // Simulate clearDebugLogs: debugLogs.length = 0
        debugLogs.length = 0;

        expect(debugLogs.length).toBe(0);
    });

    test('debugLogs cleared on chat change prevents memory accumulation', () => {
        const debugLogs = [];
        const MAX_LOGS = 100;

        // Simulate multiple chat sessions
        for (let chat = 0; chat < 5; chat++) {
            // Clear on chat change
            debugLogs.length = 0;

            // Add logs during this chat session
            for (let i = 0; i < 30; i++) {
                debugLogs.push({ timestamp: new Date().toISOString(), message: `Chat ${chat} Log ${i}` });
                if (debugLogs.length > MAX_LOGS) {
                    debugLogs.shift();
                }
            }
        }

        // After 5 chats with clearing, we should only have logs from the last chat
        expect(debugLogs.length).toBe(30);
        expect(debugLogs[0].message).toBe('Chat 4 Log 0');
    });
});

describe('Event Listener Cleanup', () => {
    test('registered handlers are tracked for cleanup', () => {
        // Simulate the registeredHandlers Map from events.js
        const registeredHandlers = new Map();

        function trackHandler(eventType, handler) {
            if (!registeredHandlers.has(eventType)) {
                registeredHandlers.set(eventType, []);
            }
            registeredHandlers.get(eventType).push(handler);
        }

        const handler1 = () => {};
        const handler2 = () => {};

        trackHandler('MESSAGE_SENT', handler1);
        trackHandler('MESSAGE_SENT', handler2);
        trackHandler('CHAT_CHANGED', handler1);

        expect(registeredHandlers.get('MESSAGE_SENT').length).toBe(2);
        expect(registeredHandlers.get('CHAT_CHANGED').length).toBe(1);
    });

    test('unregisterAllEvents clears all tracked handlers', () => {
        const registeredHandlers = new Map();

        function trackHandler(eventType, handler) {
            if (!registeredHandlers.has(eventType)) {
                registeredHandlers.set(eventType, []);
            }
            registeredHandlers.get(eventType).push(handler);
        }

        trackHandler('MESSAGE_SENT', () => {});
        trackHandler('CHAT_CHANGED', () => {});

        // Simulate unregisterAllEvents
        registeredHandlers.clear();

        expect(registeredHandlers.size).toBe(0);
    });

    test('on() function tracks handlers for cleanup', () => {
        const registeredHandlers = new Map();

        // Simulate the on() function with tracking
        function on(eventType, handler) {
            // eventSource.on(eventType, handler); // Would call real event source
            if (!registeredHandlers.has(eventType)) {
                registeredHandlers.set(eventType, []);
            }
            registeredHandlers.get(eventType).push(handler);
        }

        const handler = () => {};
        on('GENERATE_BEFORE_COMBINE_PROMPTS', handler);

        expect(registeredHandlers.has('GENERATE_BEFORE_COMBINE_PROMPTS')).toBe(true);
        expect(registeredHandlers.get('GENERATE_BEFORE_COMBINE_PROMPTS').includes(handler)).toBe(true);
    });

    test('once() function tracks handlers for cleanup', () => {
        const registeredHandlers = new Map();

        // Simulate the once() function with tracking
        function once(eventType, handler) {
            // eventSource.once(eventType, handler); // Would call real event source
            if (!registeredHandlers.has(eventType)) {
                registeredHandlers.set(eventType, []);
            }
            registeredHandlers.get(eventType).push(handler);
        }

        const handler = () => {};
        once('TEXT_COMPLETION_SETTINGS_READY', handler);

        expect(registeredHandlers.has('TEXT_COMPLETION_SETTINGS_READY')).toBe(true);
        expect(registeredHandlers.get('TEXT_COMPLETION_SETTINGS_READY').includes(handler)).toBe(true);
    });

    test('multiple handlers for same event type are all tracked', () => {
        const registeredHandlers = new Map();

        function on(eventType, handler) {
            if (!registeredHandlers.has(eventType)) {
                registeredHandlers.set(eventType, []);
            }
            registeredHandlers.get(eventType).push(handler);
        }

        const handlers = [() => {}, () => {}, () => {}];
        handlers.forEach(h => on('CHAT_CHANGED', h));

        expect(registeredHandlers.get('CHAT_CHANGED').length).toBe(3);
    });
});

describe('jQuery Event Handler Tracking', () => {
    test('tracked jQuery handlers can be cleaned up', () => {
        const jqueryEventHandlers = [];

        function trackJQueryHandler(event, selector, handler) {
            jqueryEventHandlers.push({ event, selector, handler });
            return handler;
        }

        const handler1 = () => {};
        const handler2 = () => {};

        trackJQueryHandler('click', '.rpg-item-remove', handler1);
        trackJQueryHandler('click', '.rpg-equip-btn', handler2);

        expect(jqueryEventHandlers.length).toBe(2);

        // Simulate cleanup
        jqueryEventHandlers.length = 0;
        expect(jqueryEventHandlers.length).toBe(0);
    });

    test('trackJQueryHandler returns the handler for chaining', () => {
        const jqueryEventHandlers = [];

        function trackJQueryHandler(event, selector, handler) {
            jqueryEventHandlers.push({ event, selector, handler });
            return handler;
        }

        const handler = () => 'test';
        const returned = trackJQueryHandler('click', '.selector', handler);

        expect(returned).toBe(handler);
        expect(returned()).toBe('test');
    });
});