// Dashboard JavaScript
class ResourceDashboard {
    constructor() {
        this.connection = null;
        this.cpuChart = null;
        this.memoryChart = null;
        this.cpuHistory = [];
        this.memoryHistory = [];
        this.maxHistoryPoints = 20;
        this.lastResourceData = null; // Store latest resource data
        this.lastSystemInfo = null; // Store latest system info
        this.autoRefreshEnabled = true; // Auto-refresh toggle
        this.refreshInterval = null; // Manual refresh interval
        
        this.init();
    }

    async init() {
        this.setupEventListeners();
        this.initializeCharts();
        await this.connectSignalR();
        await this.loadInitialData();
        this.hideLoading();
        this.startAutoRefresh(); // Use our new auto-refresh system
    }

    setupEventListeners() {
        document.getElementById('toggleAutoRefresh').addEventListener('click', () => {
            this.toggleAutoRefresh();
        });

        document.getElementById('toggleProcesses').addEventListener('click', () => {
            this.toggleProcessesSection();
        });

        document.getElementById('toggleDetails').addEventListener('click', () => {
            this.toggleDetailsSection();
        });

        document.getElementById('refreshData').addEventListener('click', () => {
            this.refreshData();
        });
    }

    toggleDetailsSection() {
        const detailsSection = document.getElementById('detailsSection');
        const toggleButton = document.getElementById('toggleDetails');
        
        if (detailsSection.classList.contains('hidden')) {
            detailsSection.classList.remove('hidden');
            toggleButton.innerHTML = '<i class="fas fa-info-circle mr-2"></i>Hide Details';
            // Refresh disk usage when details section becomes visible
            this.refreshDetailsData();
        } else {
            detailsSection.classList.add('hidden');
            toggleButton.innerHTML = '<i class="fas fa-info-circle mr-2"></i>Details';
        }
    }

    toggleProcessesSection() {
        const processesSection = document.getElementById('processesSection');
        const toggleButton = document.getElementById('toggleProcesses');
        
        if (processesSection.classList.contains('hidden')) {
            processesSection.classList.remove('hidden');
            toggleButton.innerHTML = '<i class="fas fa-list mr-2"></i>Hide Processes';
            // Refresh processes when section becomes visible
            this.refreshProcessesData();
        } else {
            processesSection.classList.add('hidden');
            toggleButton.innerHTML = '<i class="fas fa-list mr-2"></i>Processes';
        }
    }

    async refreshProcessesData() {
        try {
            // If we have cached data, use it immediately
            if (this.lastResourceData && this.lastResourceData.topProcesses) {
                this.updateProcessTable(this.lastResourceData.topProcesses);
            }
            
            // Then fetch fresh data
            const resourceUsage = await this.fetchData('/api/resource/usage');
            this.updateProcessTable(resourceUsage.topProcesses);
        } catch (error) {
            console.error('Error refreshing processes data:', error);
        }
    }

    async refreshDetailsData() {
        try {
            // If we have cached data, use it immediately
            if (this.lastResourceData && this.lastResourceData.disks) {
                this.updateDiskUsage(this.lastResourceData.disks);
            }
            if (this.lastSystemInfo) {
                this.updateSystemInfo(this.lastSystemInfo);
            }
            
            // Then fetch fresh data
            const [resourceUsage, systemInfo] = await Promise.all([
                this.fetchData('/api/resource/usage'),
                this.fetchData('/api/resource/system-info')
            ]);

            this.updateDiskUsage(resourceUsage.disks);
            this.updateSystemInfo(systemInfo);
        } catch (error) {
            console.error('Error refreshing details data:', error);
        }
    }

    toggleAutoRefresh() {
        this.autoRefreshEnabled = !this.autoRefreshEnabled;
        const toggleButton = document.getElementById('toggleAutoRefresh');
        
        if (this.autoRefreshEnabled) {
            toggleButton.innerHTML = '<i class="fas fa-sync mr-2"></i>Auto: ON';
            toggleButton.className = 'bg-yellow-500 hover:bg-yellow-700 px-4 py-2 rounded-lg transition-colors';
            this.startAutoRefresh();
        } else {
            toggleButton.innerHTML = '<i class="fas fa-pause mr-2"></i>Auto: OFF';
            toggleButton.className = 'bg-gray-500 hover:bg-gray-700 px-4 py-2 rounded-lg transition-colors';
            this.stopAutoRefresh();
        }
        
        console.log(`Auto-refresh ${this.autoRefreshEnabled ? 'enabled' : 'disabled'}`);
    }

    startAutoRefresh() {
        // Connect SignalR for real-time updates
        if (!this.connection || this.connection.state === 'Disconnected') {
            this.connectSignalR();
        }
        
        // Also start a fallback manual refresh timer (every 60 seconds as backup)
        if (this.refreshInterval) {
            clearInterval(this.refreshInterval);
        }
        this.refreshInterval = setInterval(() => {
            if (this.autoRefreshEnabled) {
                this.refreshData();
            }
        }, 60000); // 60 second fallback
    }

    stopAutoRefresh() {
        // Disconnect SignalR
        if (this.connection && this.connection.state === 'Connected') {
            this.connection.stop();
        }
        
        // Clear manual refresh timer
        if (this.refreshInterval) {
            clearInterval(this.refreshInterval);
            this.refreshInterval = null;
        }
    }

    async connectSignalR() {
        try {
            // Only connect if auto-refresh is enabled
            if (!this.autoRefreshEnabled) {
                console.log("SignalR connection skipped - auto-refresh disabled");
                return;
            }

            this.connection = new signalR.HubConnectionBuilder()
                .withUrl("/resourceHub")
                .build();

            this.connection.on("ResourceUpdate", (data) => {
                if (this.autoRefreshEnabled) {
                    this.updateDashboard(data);
                }
            });

            await this.connection.start();
            console.log("SignalR Connected");
        } catch (err) {
            console.error("SignalR Connection Error: ", err);
        }
    }

    async loadInitialData() {
        try {
            const [resourceUsage, systemInfo] = await Promise.all([
                this.fetchData('/api/resource/usage'),
                this.fetchData('/api/resource/system-info')
            ]);

            this.updateDashboard(resourceUsage);
            this.updateSystemInfo(systemInfo);
        } catch (error) {
            console.error('Error loading initial data:', error);
        }
    }

    async fetchData(url) {
        const response = await fetch(url);
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return await response.json();
    }

    updateDashboard(data) {
        try {
            // Store the latest data for when details section is opened
            this.lastResourceData = data;
            
            // Update CPU
            if (data.cpu) {
                const cpuUsage = data.cpu.usage || 0;
                document.getElementById('cpuUsage').textContent = `${cpuUsage.toFixed(1)}%`;
                document.getElementById('cpuBar').style.width = `${cpuUsage}%`;
                this.updateCpuChart(cpuUsage);
            }

            // Update Memory
            if (data.memory) {
                const memUsage = data.memory.usagePercentage || 0;
                document.getElementById('memoryUsage').textContent = `${memUsage.toFixed(1)}%`;
                document.getElementById('memoryBar').style.width = `${memUsage}%`;
                this.updateMemoryChart(memUsage);
            }

            // Update GPU
            if (data.gpu) {
                const gpuUsage = data.gpu.usage || 0;
                document.getElementById('gpuUsage').textContent = `${gpuUsage.toFixed(1)}%`;
                document.getElementById('gpuBar').style.width = `${gpuUsage}%`;
            }

            // Update Network
            if (data.network) {
                const bytesReceived = data.network.bytesReceived || 0;
                const bytesSent = data.network.bytesSent || 0;
                const totalSpeed = (bytesReceived + bytesSent) / 1024 / 1024;
                document.getElementById('networkSpeed').textContent = `${totalSpeed.toFixed(1)} MB/s`;
                document.getElementById('networkDetail').textContent = 
                    `↑ ${(bytesSent / 1024 / 1024).toFixed(1)} MB/s ↓ ${(bytesReceived / 1024 / 1024).toFixed(1)} MB/s`;
            }

            // Update Game Detection
            if (data.runningGame) {
                this.updateGameInfo(data.runningGame);
            } else {
                this.updateGameInfo(null);
            }

            // Update Processes (only if processes section is visible)
            if (data.topProcesses && Array.isArray(data.topProcesses) && !document.getElementById('processesSection').classList.contains('hidden')) {
                this.updateProcessTable(data.topProcesses);
            }

            // Update Disk Usage (only if details section is visible)
            if (data.disks && !document.getElementById('detailsSection').classList.contains('hidden')) {
                this.updateDiskUsage(data.disks);
            }
        } catch (error) {
            console.error('Error updating dashboard:', error);
            this.showNotification('Error updating dashboard data', 'error');
        }
    }

    updateProcessTable(processes) {
        const tableBody = document.getElementById('processTable');
        tableBody.innerHTML = '';

        if (!processes || !Array.isArray(processes)) {
            const row = document.createElement('tr');
            row.innerHTML = '<td colspan="4" class="px-4 py-4 text-center text-gray-500">No process data available</td>';
            tableBody.appendChild(row);
            return;
        }

        processes.slice(0, 10).forEach((process, index) => {
            if (!process) return;
            
            const row = document.createElement('tr');
            row.className = 'hover:bg-gray-50';
            
            const killButtonClass = index < 3 ? 
                'bg-red-500 hover:bg-red-700 text-white px-2 py-1 rounded text-xs transition-colors' :
                'bg-gray-300 text-gray-500 px-2 py-1 rounded text-xs cursor-not-allowed';
            
            const killButtonDisabled = index >= 3 ? 'disabled' : '';
            const processName = process.name || 'Unknown';
            const processId = process.processId || 0;
            const cpuUsage = process.cpuUsage || 0;
            const memoryUsage = process.memoryUsage || 0;

            row.innerHTML = `
                <td class="px-4 py-4 whitespace-nowrap">
                    <div class="flex items-center">
                        <div class="text-sm font-medium text-gray-900">${processName}</div>
                        <div class="text-sm text-gray-500 ml-2">PID: ${processId}</div>
                    </div>
                </td>
                <td class="px-4 py-4 whitespace-nowrap text-sm text-gray-900">
                    ${cpuUsage.toFixed(1)}%
                </td>
                <td class="px-4 py-4 whitespace-nowrap text-sm text-gray-900">
                    ${(memoryUsage / 1024 / 1024).toFixed(1)} MB
                </td>
                <td class="px-4 py-4 whitespace-nowrap text-sm text-gray-900">
                    <button onclick="dashboard.killProcess(${processId}, '${processName}')" 
                            class="${killButtonClass}" ${killButtonDisabled}>
                        <i class="fas fa-times mr-1"></i>Kill
                    </button>
                </td>
            `;
            tableBody.appendChild(row);
        });
    }

    async killProcess(processId, processName) {
        if (!confirm(`Are you sure you want to terminate "${processName}" (PID: ${processId})?`)) {
            return;
        }

        try {
            const response = await fetch(`/api/resource/kill-process/${processId}`, {
                method: 'POST'
            });

            if (response.ok) {
                const result = await response.json();
                this.showNotification(result.message, 'success');
                await this.refreshData();
            } else {
                const error = await response.text();
                this.showNotification(`Failed to kill process: ${error}`, 'error');
            }
        } catch (error) {
            console.error('Error killing process:', error);
            this.showNotification('Error killing process', 'error');
        }
    }

    updateSystemInfo(systemInfo) {
        // Store the latest system info
        this.lastSystemInfo = systemInfo;
        
        const systemInfoDiv = document.getElementById('systemInfo');
        systemInfoDiv.innerHTML = `
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">Machine Name</h4>
                <p class="text-gray-600">${systemInfo.machineName || 'N/A'}</p>
            </div>
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">OS Version</h4>
                <p class="text-gray-600">${systemInfo.osVersion || 'N/A'}</p>
            </div>
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">CPU</h4>
                <p class="text-gray-600">${systemInfo.cpuName || 'N/A'}</p>
            </div>
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">Processor Count</h4>
                <p class="text-gray-600">${systemInfo.processorCount || 0} cores</p>
            </div>
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">Total Memory</h4>
                <p class="text-gray-600">${systemInfo.totalPhysicalMemory ? (systemInfo.totalPhysicalMemory / 1024 / 1024 / 1024).toFixed(1) : 'N/A'} GB</p>
            </div>
            <div class="bg-gray-50 p-4 rounded-lg">
                <h4 class="font-semibold text-gray-700">Uptime</h4>
                <p class="text-gray-600">${systemInfo.uptime ? this.formatUptime(systemInfo.uptime) : 'N/A'}</p>
            </div>
        `;
    }

    updateDiskUsage(disks) {
        const diskUsageDiv = document.getElementById('diskUsage');
        diskUsageDiv.innerHTML = '';

        if (!disks || !Array.isArray(disks)) {
            diskUsageDiv.innerHTML = '<p class="text-gray-500">No disk information available</p>';
            return;
        }

        disks.forEach(disk => {
            if (!disk || !disk.totalSize || !disk.freeSpace) return;
            
            const usagePercentage = ((disk.totalSize - disk.freeSpace) / disk.totalSize * 100);
            const diskName = disk.label ? `${disk.driveLetter} (${disk.label})` : disk.driveLetter || 'Unknown Drive';
            const diskDiv = document.createElement('div');
            diskDiv.className = 'bg-gray-50 p-4 rounded-lg';
            diskDiv.innerHTML = `
                <div class="flex justify-between items-center mb-2">
                    <h4 class="font-semibold text-gray-700">${diskName}</h4>
                    <span class="text-sm text-gray-500">${usagePercentage.toFixed(1)}% used</span>
                </div>
                <div class="w-full bg-gray-200 rounded-full h-2 mb-2">
                    <div class="bg-blue-600 h-2 rounded-full" style="width: ${usagePercentage}%"></div>
                </div>
                <div class="flex justify-between text-sm text-gray-600">
                    <span>Free: ${(disk.freeSpace / 1024 / 1024 / 1024).toFixed(1)} GB</span>
                    <span>Total: ${(disk.totalSize / 1024 / 1024 / 1024).toFixed(1)} GB</span>
                </div>
            `;
            diskUsageDiv.appendChild(diskDiv);
        });
    }

    updateGameInfo(gameInfo) {
        console.log('updateGameInfo called with:', gameInfo); // Debug log
        const gameStatusSpan = document.getElementById('gameStatus');
        const gameInfoDiv = document.getElementById('gameInfo');

        if (!gameInfo) {
            console.log('No game detected, showing default state'); // Debug log
            gameStatusSpan.textContent = 'No game detected';
            gameInfoDiv.innerHTML = `
                <div class="text-center py-8">
                    <div class="text-gray-400 mb-4">
                        <i class="fas fa-gamepad text-4xl"></i>
                    </div>
                    <p class="text-gray-500">No game currently running</p>
                </div>
            `;
            return;
        }

        console.log('Game detected:', gameInfo.gameName); // Debug log
        gameStatusSpan.textContent = 'Game detected';
        gameStatusSpan.className = 'text-sm text-green-600 font-semibold';
        
        gameInfoDiv.innerHTML = `
            <div class="bg-gradient-to-r from-purple-50 to-blue-50 p-6 rounded-lg">
                <div class="flex items-center justify-between mb-4">
                    <div class="flex items-center">
                        <div class="bg-green-100 p-3 rounded-full mr-4">
                            <i class="fas fa-gamepad text-green-600 text-2xl"></i>
                        </div>
                        <div>
                            <h3 class="text-xl font-bold text-gray-800">${gameInfo.gameName || 'Unknown Game'}</h3>
                            <p class="text-gray-600">Running since ${this.formatGameStartTime(gameInfo.startTime)}</p>
                        </div>
                    </div>
                    <div class="flex items-center space-x-3">
                        <div class="bg-green-500 text-white px-3 py-1 rounded-full text-sm font-medium">
                            <i class="fas fa-circle text-xs mr-1"></i>ACTIVE
                        </div>
                        <button onclick="dashboard.killProcess(${gameInfo.processId}, '${gameInfo.gameName || 'Unknown Game'}')" 
                                class="bg-red-500 hover:bg-red-700 text-white px-3 py-2 rounded-lg text-sm font-medium transition-colors">
                            <i class="fas fa-times mr-1"></i>End Game
                        </button>
                    </div>
                </div>
                
                <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
                    <div class="bg-white p-4 rounded-lg">
                        <h4 class="font-semibold text-gray-700 mb-2">Process ID</h4>
                        <p class="text-gray-600">${gameInfo.processId || 'N/A'}</p>
                    </div>
                    <div class="bg-white p-4 rounded-lg">
                        <h4 class="font-semibold text-gray-700 mb-2">Memory Usage</h4>
                        <p class="text-gray-600">${gameInfo.memoryUsage ? (gameInfo.memoryUsage / 1024 / 1024).toFixed(1) + ' MB' : 'N/A'}</p>
                    </div>
                    <div class="bg-white p-4 rounded-lg">
                        <h4 class="font-semibold text-gray-700 mb-2">CPU Usage</h4>
                        <p class="text-gray-600">${gameInfo.cpuUsage ? gameInfo.cpuUsage.toFixed(1) + '%' : 'N/A'}</p>
                    </div>
                </div>
            </div>
        `;
    }

    formatGameStartTime(startTime) {
        if (!startTime) return 'Unknown';
        try {
            const date = new Date(startTime);
            const now = new Date();
            const diffMs = now - date;
            const diffMins = Math.floor(diffMs / 60000);
            const diffHours = Math.floor(diffMins / 60);
            
            if (diffHours > 0) {
                return `${diffHours}h ${diffMins % 60}m ago`;
            } else {
                return `${diffMins}m ago`;
            }
        } catch (error) {
            return 'Unknown';
        }
    }

    initializeCharts() {
        // CPU Chart
        const cpuCtx = document.getElementById('cpuChart').getContext('2d');
        this.cpuChart = new Chart(cpuCtx, {
            type: 'line',
            data: {
                labels: [],
                datasets: [{
                    label: 'CPU Usage %',
                    data: [],
                    borderColor: 'rgb(59, 130, 246)',
                    backgroundColor: 'rgba(59, 130, 246, 0.1)',
                    tension: 0.4
                }]
            },
            options: {
                responsive: true,
                scales: {
                    y: {
                        beginAtZero: true,
                        max: 100
                    }
                }
            }
        });

        // Memory Chart
        const memoryCtx = document.getElementById('memoryChart').getContext('2d');
        this.memoryChart = new Chart(memoryCtx, {
            type: 'line',
            data: {
                labels: [],
                datasets: [{
                    label: 'Memory Usage %',
                    data: [],
                    borderColor: 'rgb(34, 197, 94)',
                    backgroundColor: 'rgba(34, 197, 94, 0.1)',
                    tension: 0.4
                }]
            },
            options: {
                responsive: true,
                scales: {
                    y: {
                        beginAtZero: true,
                        max: 100
                    }
                }
            }
        });
    }

    updateCpuChart(cpuUsage) {
        this.cpuHistory.push(cpuUsage);
        if (this.cpuHistory.length > this.maxHistoryPoints) {
            this.cpuHistory.shift();
        }

        this.cpuChart.data.labels = this.cpuHistory.map((_, index) => '');
        this.cpuChart.data.datasets[0].data = this.cpuHistory;
        this.cpuChart.update('none');
    }

    updateMemoryChart(memoryUsage) {
        this.memoryHistory.push(memoryUsage);
        if (this.memoryHistory.length > this.maxHistoryPoints) {
            this.memoryHistory.shift();
        }

        this.memoryChart.data.labels = this.memoryHistory.map((_, index) => '');
        this.memoryChart.data.datasets[0].data = this.memoryHistory;
        this.memoryChart.update('none');
    }

    async refreshData() {
        try {
            console.log('Manual refresh triggered');
            const resourceUsage = await this.fetchData('/api/resource/usage');
            this.updateDashboard(resourceUsage);
            
            // Show brief success feedback
            this.showNotification('Data refreshed successfully', 'success');
        } catch (error) {
            console.error('Error refreshing data:', error);
            this.showNotification('Error refreshing data', 'error');
        }
    }

    // Legacy method - now handled by startAutoRefresh()
    startDataRefresh() {
        console.log("Using new auto-refresh system instead");
        this.startAutoRefresh();
    }

    formatUptime(uptime) {
        // Parse TimeSpan string format "d.hh:mm:ss.fffffff"
        if (typeof uptime === 'string') {
            const parts = uptime.split('.');
            const days = parseInt(parts[0]) || 0;
            
            if (parts[1]) {
                const timeParts = parts[1].split(':');
                const hours = parseInt(timeParts[0]) || 0;
                const minutes = parseInt(timeParts[1]) || 0;
                
                return `${days}d ${hours}h ${minutes}m`;
            }
            return `${days}d 0h 0m`;
        }
        
        // Fallback for object format
        const days = Math.floor(uptime.totalDays || 0);
        const hours = Math.floor(uptime.hours || 0);
        const minutes = Math.floor(uptime.minutes || 0);
        
        return `${days}d ${hours}h ${minutes}m`;
    }

    showNotification(message, type = 'info') {
        const notification = document.createElement('div');
        notification.className = `fixed top-4 right-4 z-50 p-4 rounded-lg shadow-lg ${
            type === 'success' ? 'bg-green-500' : 
            type === 'error' ? 'bg-red-500' : 'bg-blue-500'
        } text-white`;
        notification.textContent = message;
        
        document.body.appendChild(notification);
        
        setTimeout(() => {
            notification.remove();
        }, 3000);
    }

    hideLoading() {
        document.getElementById('loadingOverlay').style.display = 'none';
    }
}

// Initialize dashboard when page loads
let dashboard;
document.addEventListener('DOMContentLoaded', () => {
    dashboard = new ResourceDashboard();
});