package io.trygvis.model;

import javax.persistence.*;
import java.util.*;
import java.util.regex.*;

@Entity
public class Task {
    @Id
    @SequenceGenerator(name = "task_seq", sequenceName = "task_seq")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "task_seq")
    private Long id;

    @ManyToOne
    private Queue queue;

    private Date scheduled;

    private Date lastRun;

    private int runCount;

    private Date completed;

    private String arguments;

    private static final Pattern pattern = Pattern.compile(" ");

    @SuppressWarnings("UnusedDeclaration")
    private Task() {
    }

    public Task(Queue queue, Date scheduled, String... arguments) {
        this.queue = queue;
        this.scheduled = scheduled;

        StringBuilder builder = new StringBuilder(arguments.length * 100);
        for (String argument : arguments) {
            if (pattern.matcher(argument).matches()) {
                throw new RuntimeException("Bad argument: '" + argument + "'.");
            }
            builder.append(argument).append(' ');
        }
        this.arguments = builder.toString();
    }

    public Long getId() {
        return id;
    }

    public String[] getArguments() {
        return arguments.split(" ");
    }

    public Date getScheduled() {
        return scheduled;
    }

    public Date getLastRun() {
        return lastRun;
    }

    public int getRunCount() {
        return runCount;
    }

    public Date getCompleted() {
        return completed;
    }

    public boolean isDone() {
        return completed != null;
    }

    public void registerRun() {
        lastRun = new Date();
        runCount++;
    }

    public void registerComplete(Date completed) {
        this.completed = completed;
    }

    public String toString() {
        return "Task{" +
                "id=" + id +
                ", queue=" + queue +
                ", scheduled=" + scheduled +
                ", lastRun=" + lastRun +
                ", runCount=" + runCount +
                ", completed=" + completed +
                ", arguments='" + arguments + '\'' +
                '}';
    }
}