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 * The MIT License (MIT)                                                         *
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 * Copyright (c) 2015-2022 aoju.org and other contributors.                      *
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package org.aoju.bus.core.map;

import org.aoju.bus.core.text.TextJoiner;
import org.aoju.bus.core.toolkit.ArrayKit;
import org.aoju.bus.core.toolkit.StringKit;

import java.util.Iterator;
import java.util.Map;
import java.util.function.Predicate;

/**
 * Map拼接器，可以拼接包括Map、Entry列表等
 *
 * @author Kimi Liu
 * @since Java 17+
 */
public class MapJoiner {

    private final TextJoiner joiner;
    private final String keyValueSeparator;

    /**
     * 构造
     *
     * @param joiner            entry之间的Joiner
     * @param keyValueSeparator kv之间的连接符
     */
    public MapJoiner(final TextJoiner joiner, final String keyValueSeparator) {
        this.joiner = joiner;
        this.keyValueSeparator = keyValueSeparator;
    }

    /**
     * 构建一个MapJoiner
     *
     * @param separator         entry之间的连接符
     * @param keyValueSeparator kv之间的连接符
     * @return this
     */
    public static MapJoiner of(final String separator, final String keyValueSeparator) {
        return of(TextJoiner.of(separator), keyValueSeparator);
    }

    /**
     * 构建一个MapJoiner
     *
     * @param joiner            entry之间的Joiner
     * @param keyValueSeparator kv之间的连接符
     * @return this
     */
    public static MapJoiner of(final TextJoiner joiner, final String keyValueSeparator) {
        return new MapJoiner(joiner, keyValueSeparator);
    }

    /**
     * 追加Map
     *
     * @param <K>       键类型
     * @param <V>       值类型
     * @param map       Map
     * @param predicate Map过滤器
     * @return this
     */
    public <K, V> MapJoiner append(final Map<K, V> map, final Predicate<Map.Entry<K, V>> predicate) {
        return append(map.entrySet().iterator(), predicate);
    }

    /**
     * 追加Entry列表
     *
     * @param <K>       键类型
     * @param <V>       值类型
     * @param parts     Entry列表
     * @param predicate Map过滤器
     * @return this
     */
    public <K, V> MapJoiner append(final Iterator<? extends Map.Entry<K, V>> parts, final Predicate<Map.Entry<K, V>> predicate) {
        if (null == parts) {
            return this;
        }

        Map.Entry<K, V> entry;
        while (parts.hasNext()) {
            entry = parts.next();
            if (null == predicate || predicate.test(entry)) {
                joiner.append(TextJoiner.of(this.keyValueSeparator).append(entry.getKey()).append(entry.getValue()));
            }
        }
        return this;
    }

    /**
     * 追加其他字符串，其他字符串简单拼接
     *
     * @param params 字符串列表
     * @return this
     */
    public MapJoiner append(final String... params) {
        if (ArrayKit.isNotEmpty(params)) {
            joiner.append(StringKit.concat(false, params));
        }
        return this;
    }

    @Override
    public String toString() {
        return joiner.toString();
    }

}
