import javax.swing.text.html.HTMLDocument;
import java.net.SocketOption;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.DateTimeException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.format.SignStyle;
import java.util.*;

public class TextMenu {
private final String title = "title";
private final String[] options = new String []{
        "List of all packages",
        "Add a package",
"remove a package",
"list overdue packages",
"List upcoming packages",
"mark package as delivered",
"exit"};

public void display(){
    int tag = title.length();
    for (int i=0; i<= tag+3; i++){
         System.out.print("#");
    }
    System.out.println("\n# " + title + " #");
    for (int i=0; i<= tag+3; i++){
        System.out.print("#");
    }
    DateFormat today = new SimpleDateFormat("yyy-MM-dd");
    Calendar cal=Calendar.getInstance();
    System.out.println("\nToday is: " + today.format(cal.getTime()));
for (int i = 0; i < options.length; i++){
    System.out.println((i+1) + ": " + options[i]);
}
}

public void list(ArrayList<PackageInfo> packageList){
if (packageList.size() == 0){
    System.out.println("No packages to show");
}
else{
    for (int i=0; i < packageList.size(); i++){
        System.out.println("Package #" + (i+1));
        System.out.println(packageList.get(i).toString());
    }
}
}

    public void add(ArrayList<PackageInfo> packageList){
        Scanner scan = new Scanner(System.in);
        String pName;
        do {
            System.out.println("enter a valid package name:");
            pName = scan.nextLine();
        }
        while (pName.length()==0);
        System.out.println("notes:");
        String pNotes = scan.nextLine();
        boolean checkDate = false;
        DateTimeFormatter format = DateTimeFormatter.ofPattern("yyy-MM-dd HH:mm");
        LocalDateTime pDate=LocalDateTime.now();
        while (checkDate == false){
            try {
                System.out.println("enter date as yyyy-mm-dd hh:mm:");
                pDate = LocalDateTime.parse(scan.nextLine(), format);
                checkDate = true;
            }
            catch (DateTimeParseException e) {
                System.out.println("invalid date format");
            }
        }
        double pPrice;
        do {
            System.out.println("enter price:");
            pPrice = scan.nextDouble();
        }
        while (pPrice < 0);
        double pWeight;
        do {
            System.out.println("enter weight:");
            pWeight = scan.nextDouble();
        }
        while (pWeight <= 0);

        packageList.add(new PackageInfo(pName, pNotes, pPrice, pWeight, false, pDate));
        System.out.println(pName + " has been added to the list!");
    }

    public void remove(ArrayList<PackageInfo> packageList) {
        this.list(packageList);
        if (packageList.size() == 0){
            return;
        }
        Scanner scan = new Scanner(System.in);
        int n;
        do {
            System.out.println("enter item number you want to remove (0 to cancel):");
            n = scan.nextInt();
        }
        while (n < 0 || n > packageList.size());
        if (n > 0){
            System.out.println(packageList.get(n-1).getName() + " has been removed from the list.");
            packageList.remove(n-1);
        }
    }

    //due=true returns overdue packages, else upcoming packages
    public ArrayList<PackageInfo> sortList(ArrayList<PackageInfo> pList, boolean due){
        ArrayList<PackageInfo> sortedList = new ArrayList<>();
        LocalDateTime today = LocalDateTime.now();
        DateTimeFormatter format = DateTimeFormatter.ofPattern("yyy-MM-dd HH:mm");
        today.format(format);
        for (int i = 0; i < pList.size(); i++) {
            PackageInfo p = pList.get(i);
            if (!p.getDelivered()) {
                if (due && today.isAfter(p.getExpectedDate())) {
                    sortedList.add(p);
                }
                else if (!due && today.isBefore(p.getExpectedDate())){
                    sortedList.add(p);
                }
            }
        }
Collections.sort(sortedList);
        return sortedList;
    }

    public void overDueList(ArrayList<PackageInfo> packageList){
ArrayList<PackageInfo> overdue = sortList(packageList, true);
if (overdue.size() == 0){
    System.out.println("no overdue packages to show");
    return;
}
this.list(overdue);
    }

    public void upcomingList(ArrayList<PackageInfo> packageList){
        ArrayList<PackageInfo> upcoming = sortList(packageList, false);
        if (upcoming.size() == 0){
            System.out.println("no upcoming packages to show");
            return;
        }
        this.list(upcoming);
    }

    public ArrayList<PackageInfo> getUndelivered(List<PackageInfo> packageList){
    ArrayList<PackageInfo> undelivered = new ArrayList<>();
        for (int i = 0; i < packageList.size(); i++){
            if (packageList.get(i).getDelivered() == false){
                undelivered.add(packageList.get(i));
            }
        }
return undelivered;
    }

    public void markDelivered(ArrayList<PackageInfo> packageList){
        ArrayList<PackageInfo> undelivered=getUndelivered(packageList);
        if (undelivered.size() == 0){
            System.out.println("No undelivered packages to show");
            return;
        }
        this.list(undelivered);
        Scanner scan = new Scanner(System.in);
        int n;
        do {
            System.out.println("enter item number you want to mark delivered (0 to cancel):");
            n = scan.nextInt();
        }
        while (n < 0 || n > undelivered.size());
        if (n > 0){
            PackageInfo p = undelivered.get(n-1);
            packageList.get(packageList.indexOf(p)).setDelivered(true);
            System.out.println(p.getName() + " has been delivered.");
        }
    }


}