Home.java

package dashboard;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class Home {

    private static final String FILE_SEPARATOR = File.separator;

    public static void page() {

        CodeUtil.clearScreen();
        announcements();

        System.out.println("\n");
        tasks();

        System.out.println("\n");
        displayServerStatsGraph();

        System.out.println("\n");
        displayStatuses();

        //Waiting for user input to move forward:
        
        System.out.print("\nPress any key to go to the Navigation page...");
        waitForUserInput();

        Navigation.navbar();
        
    }

    private static void waitForUserInput() {
        try {
            System.in.read();
        } catch (IOException e) {
            System.out.println("Error while waiting for user input: " + e.getMessage());
        }
    }

    //Shows announcements from the file:
    public static void announcements(){

        String path = null;

        try {
            path = new File(".").getCanonicalPath();
        } catch (IOException e) {
            System.out.println("Error: while getting the path of the program.");
        }

        

        System.out.println("Recent Announcements:\n");

        File announcementsFile = new File(path + FILE_SEPARATOR + "dashboard" + FILE_SEPARATOR + "files"+ FILE_SEPARATOR + "announcements.txt");

        try (BufferedReader reader = new BufferedReader(new FileReader(announcementsFile))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (FileNotFoundException e) {
            System.out.println("-");
        } catch (IOException e) {
            System.out.println("Error reading announcements file: " + e.getMessage());
        }

    }

    //shows server statuses:
    public static void displayStatuses() {

        //Following code is for getting specific path to avoid future errors...
        String path = null;
    
        try {
            path = new File(".").getCanonicalPath();
        } catch (IOException e) {
            System.out.println("Error: while getting the path of the program.");
        }
    
        System.out.println("Server Status:\n");
    
        File statusesFile = new File(path + FILE_SEPARATOR + "dashboard" + FILE_SEPARATOR + "files" + FILE_SEPARATOR + "statuses.csv");
    
        StatusData statusData = new StatusData();
        statusData.load(statusesFile.getAbsolutePath());
        StatusData[] statuses = statusData.getStatuses();
    
        if (statuses != null && statuses.length > 0) {
            // Displaying the titles with proper formatting:
            System.out.printf("%-15s%-20s%-15s%-10s%-10s%-20s%-15s\n",
                    "ServerName", "ServerAddress", "CPUUsage", "Cycles", "IO", "LastUpdate", "ServerHealth");
    
            // Displaying the data with proper formatting...
            for (StatusData status : statuses) {
                //used printf to get better option of displaying and spacing:
                System.out.printf("%-15s%-20s%-15s%-10s%-10s%-20s%-15s\n",
                        status.getServerName(), status.getServerAddress(), status.getCpuUsage(),
                        status.getCycles(), status.getIo(), status.getLastUpdate(), status.getServerHealth());
            }
        } else {
            System.out.println("No status data available.");
        }
    }
    
    //shows a small graph by using '*':
    public static void displayServerStatsGraph() {
        String path = null;

        try {
            path = new File(".").getCanonicalPath();
        } catch (IOException e) {
            System.out.println("Error: while getting the path of the program.");
        }

        System.out.println("Server Statistics Bar Graph:\n");

        File serverStatsFile = new File(path + FILE_SEPARATOR + "dashboard" + FILE_SEPARATOR + "files" + FILE_SEPARATOR + "monthstats.csv");

        ServerStats serverStats = new ServerStats();
        serverStats.load(serverStatsFile.getAbsolutePath());
        ServerStats[] servers = serverStats.getServers();

        if (servers != null && servers.length > 0) {
            ServerStats.displayBarGraph(servers);
        } else {
            System.out.println("No server statistics available.");
        }
    }

    //Shows assigned tasks:
    public static void tasks(){

        String path = null;

        try {
            path = new File(".").getCanonicalPath();
        } catch (IOException e) {
            System.out.println("Error: while getting the path of the program.");
        }

        

        System.out.println("Assigned to You:\n");

        File assignmentsFile = new File(path + FILE_SEPARATOR + "dashboard" + FILE_SEPARATOR + "files"+ FILE_SEPARATOR + "assignments.txt");

        try (BufferedReader reader = new BufferedReader(new FileReader(assignmentsFile))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (FileNotFoundException e) {
            System.out.println("-");
        } catch (IOException e) {
            System.out.println("Error reading assignments file: " + e.getMessage());
        }

    }
}