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package org.asteriskjava.config;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Category extends ConfigElement {
    private String name;
    private boolean template;
    private final List baseCategories = new ArrayList<>();
    private final List elements = new ArrayList<>();

    /**
     * The last object in the list will get assigned any trailing comments when EOF is hit.
     */
    //private String trailingComment;
    public Category(String name) {
        if (name == null) {
            throw new IllegalArgumentException("Name must not be null");
        }
        this.name = name;
    }

    public Category(String filename, int lineno, String name) {
        super(filename, lineno);
        this.name = name;
    }

    /**
     * Returns the name of this category.
     *
     * @return the name of this category.
     */
    public String getName() {
        return name;
    }

    /**
     * Checks if this category is a template.
     *
     * @return true if this category is a template, false otherwise.
     */
    public boolean isTemplate() {
        return template;
    }

    void markAsTemplate() {
        template = true;
    }

    /**
     * Returns a list of categories this category inherits from.
     *
     * @return a list of categories this category inherits from, never null.
     */
    public List getBaseCategories() {
        return baseCategories;
    }

    void addBaseCategory(Category baseCategory) {
        baseCategories.add(baseCategory);
    }

    public List getElements() {
        return elements;
    }

    public void addElement(ConfigElement element) {
        if (element instanceof Category) {
            throw new IllegalArgumentException("Nested categories are not allowed");
        }

        elements.add(element);
    }

    public String format() {
        StringBuilder sb = new StringBuilder();

        format(sb);
        for (ConfigElement e : elements) {
            sb.append("\n");
            e.format(sb);
        }
        return sb.toString();
    }

    @Override
    protected StringBuilder rawFormat(StringBuilder sb) {
        sb.append("[").append(name).append("]");
        if (isTemplate() || !getBaseCategories().isEmpty()) {
            sb.append("(");
            if (isTemplate()) {
                sb.append("!");
                if (!getBaseCategories().isEmpty()) {
                    sb.append(",");
                }
            }
            Iterator inheritsFromIterator = getBaseCategories().iterator();
            while (inheritsFromIterator.hasNext()) {
                sb.append(inheritsFromIterator.next().getName());
                if (inheritsFromIterator.hasNext()) {
                    sb.append(",");
                }
            }
            sb.append(")");
        }

        return sb;
    }

    @Override
    public String toString() {
        return name;
    }
}