package seedu.address.model.task;

import seedu.address.model.tag.UniqueTagList;

/**
 * A read-only immutable interface for a Task in the task manager.
 * Implementations should guarantee: details are present and not null, field values are validated.
 */
public interface ReadOnlyTask {

    Description getDescription();
    Priority getPriority();
    TaskDate getStartDate();
    TaskDate getEndDate();

    /**
     * The returned TagList is a deep copy of the internal TagList,
     * changes on the returned list will not affect the person's internal tags.
     */
    UniqueTagList getTags();

    /**
     * Returns true if both have the same state. (interfaces cannot override .equals)
     */
    default boolean isSameStateAs(ReadOnlyTask other) {
        return other == this // short circuit if same object
                || (other != null // this is first to avoid NPE below
                && other.getDescription().equals(this.getDescription()) // state checks here onwards
                && other.getPriority() == this.getPriority()
                && other.getStartDate().equals(this.getStartDate()))
                && other.getEndDate().equals(this.getEndDate());
    }

    /**
     * Formats the task as text, showing all task details.
     */
    default String getAsText() {
        final StringBuilder builder = new StringBuilder();
        builder.append(getDescription())
                .append(" Priority: ")
                .append(getPriority())
                .append(" Start Date: ")
                .append(getStartDate())
                .append(" End Date: ")
                .append(getEndDate())
                .append(" Tags: ");
        getTags().forEach(builder::append);
        return builder.toString();
    }

}

@@ -399,16 +399,42 @@
 dDate();
+%0A    boolean isComplete();
 %0A%0A    /*
@@ -1204,16 +1204,75 @@
 dDate())
+%0A                && other.isComplete() == this.isComplete()
 ;%0A    %7D%0A

add isComplete check to equals command in ReadOnlyTask