package io.trygvis.queue;

import java.util.*;

import static java.util.Collections.unmodifiableList;

/**
 * TODO: next run on failures. A default strategy from the queue, let the task be able to re-schedule itself.
 */
public class Task {

    public final long id;

    public final String queue;

    public final Date scheduled;

    public final Date lastRun;

    public final int runCount;

    public final Date completed;

    public final List<String> arguments;

    Task(long id, String queue, Date scheduled, Date lastRun, int runCount, Date completed, List<String> arguments) {
        this.id = id;
        this.queue = queue;
        this.scheduled = scheduled;
        this.lastRun = lastRun;
        this.runCount = runCount;
        this.completed = completed;

        this.arguments = unmodifiableList(new ArrayList<>(arguments));
    }

    public Task registerRun() {
        return new Task(id, queue, scheduled, new Date(), runCount + 1, completed, arguments);
    }

    public Task registerComplete(Date completed) {
        return new Task(id, queue, scheduled, lastRun, runCount, new Date(), arguments);
    }

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

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