/**
 * Enhanced Real-Time Error Monitoring
 * Captures ALL browser console output and forwards it to the server
 */

(function() {
    'use strict';

    const ERROR_ENDPOINT = '/claude/api/log-error';

    // Queue to prevent error loops
    const errorQueue = [];
    let isReporting = false;

    // Send error to server with better error handling
    function reportError(errorData) {
        errorQueue.push(errorData);
        processQueue();
    }

    function processQueue() {
        if (isReporting || errorQueue.length === 0) return;

        isReporting = true;
        const errorData = errorQueue.shift();

        // Add timestamp if not present
        if (!errorData.timestamp) {
            errorData.timestamp = new Date().toISOString();
        }

        // Add URL if not present
        if (!errorData.url) {
            errorData.url = window.location.href;
        }

        // Add page info
        errorData.pageInfo = {
            pathname: window.location.pathname,
            search: window.location.search,
            hash: window.location.hash
        };

        fetch(ERROR_ENDPOINT, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(errorData)
        })
        .catch(err => {
            // Silently fail - don't log to console to prevent infinite loop
            // Last resort: store in sessionStorage for later retrieval
            try {
                const stored = JSON.parse(sessionStorage.getItem('browser_errors') || '[]');
                stored.push(errorData);
                sessionStorage.setItem('browser_errors', JSON.stringify(stored.slice(-50)));
            } catch(e) {}
        })
        .finally(() => {
            isReporting = false;
            // Process next error after a short delay
            setTimeout(processQueue, 100);
        });
    }

    // Create visual error indicator
    function createErrorIndicator() {
        if (document.getElementById('error-indicator')) return;

        const indicator = document.createElement('div');
        indicator.id = 'error-indicator';
        indicator.innerHTML = '⚠️ Errors - Check Server Logs';
        indicator.style.cssText = `
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
            z-index: 99999;
            cursor: pointer;
            animation: slideIn 0.3s ease-out;
            display: none;
        `;
        indicator.onclick = () => {
            indicator.remove();
        };

        const style = document.createElement('style');
        style.textContent = `
            @keyframes slideIn {
                from { transform: translateY(100px); opacity: 0; }
                to { transform: translateY(0); opacity: 1; }
            }
        `;
        document.head.appendChild(style);

        document.body.appendChild(indicator);

        return indicator;
    }

    function showErrorIndicator() {
        const indicator = createErrorIndicator();
        if (indicator) {
            indicator.style.display = 'block';
            // Auto-hide after 30 seconds
            setTimeout(() => {
                if (indicator.parentElement) {
                    indicator.style.animation = 'slideIn 0.3s ease-out reverse';
                    setTimeout(() => indicator.remove(), 300);
                }
            }, 30000);
        }
    }

    // Intercept ALL console methods
    const consoleMethods = ['log', 'warn', 'info', 'error', 'debug'];
    const originals = {};

    consoleMethods.forEach(method => {
        originals[method] = console[method];

        console[method] = function(...args) {
            // Call original console method
            originals[method].apply(console, args);

            // Format the message for server logging
            const message = args.map(arg => {
                if (typeof arg === 'string') return arg;
                if (typeof arg === 'object') {
                    try { return JSON.stringify(arg); }
                    catch(e) { return String(arg); }
                }
                return String(arg);
            }).join(' ');

            // Skip reporting our own error-monitor failures to prevent infinite loop
            if (message.includes('[ErrorMonitor] Failed to report error')) {
                return;
            }
            // Skip AUTO-FIX logs from server
            if (message.includes('AUTO_FIX')) {
                return;
            }

            // Report to server
            reportError({
                type: `console-${method}`,
                method: method,
                message: message,
                args: args.map(arg => {
                    if (typeof arg === 'object') {
                        try { return JSON.stringify(arg); }
                        catch(e) { return String(arg); }
                    }
                    return String(arg);
                }),
                timestamp: new Date().toISOString(),
                url: window.location.href
            });

            // Show error indicator for errors
            if (method === 'error') {
                showErrorIndicator();
            }
        };
    });

    // Global error handler
    window.addEventListener('error', (event) => {
        reportError({
            type: 'javascript-error',
            message: event.message,
            filename: event.filename,
            line: event.lineno,
            column: event.colno,
            stack: event.error?.stack,
            timestamp: new Date().toISOString(),
            url: window.location.href
        });
        showErrorIndicator();
    });

    // Unhandled promise rejection handler
    window.addEventListener('unhandledrejection', (event) => {
        reportError({
            type: 'unhandled-rejection',
            message: event.reason?.message || String(event.reason),
            stack: event.reason?.stack,
            timestamp: new Date().toISOString(),
            url: window.location.href
        });
        showErrorIndicator();
    });

    // Resource loading errors
    window.addEventListener('error', (event) => {
        if (event.target !== window) {
            const src = event.target.src || event.target.href || 'unknown';
            reportError({
                type: 'resource-error',
                message: 'Failed to load: ' + src,
                tagName: event.target.tagName,
                timestamp: new Date().toISOString(),
                url: window.location.href
            });
            showErrorIndicator();
        }
    }, true);

    // Log page load
    reportError({
        type: 'page-load',
        message: 'Page loaded',
        url: window.location.href,
        timestamp: new Date().toISOString()
    });

    // Log SSE client status after page loads
    setTimeout(() => {
        reportError({
            type: 'sse-status-check',
            message: 'SSE Client Status',
            sseClientExists: typeof window.sseClient !== 'undefined',
            sseClientType: typeof window.sseClient,
            registerSSEEventHandlersExists: typeof window.registerSSEEventHandlers !== 'undefined',
            attachedSessionId: window.attachedSessionId || 'not-set',
            currentSessionId: window.chatSessionId || 'not-set',
            pathname: window.location.pathname,
            timestamp: new Date().toISOString()
        });
    }, 2000);

    // Report any sessionStorage errors from previous page loads
    try {
        const stored = sessionStorage.getItem('browser_errors');
        if (stored) {
            const errors = JSON.parse(stored);
            errors.forEach(err => reportError(err));
            sessionStorage.removeItem('browser_errors');
        }
    } catch(e) {
        // Ignore errors parsing stored errors
    }

    console.log('[ErrorMonitor] Enhanced error monitoring active - all console output being sent to server');
})();