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Common utils for BOX projects.
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package commons.box.app;

import commons.box.util.Maps;
import commons.box.util.Strs;
import org.apache.commons.lang3.builder.ToStringBuilder;

import java.util.Locale;
import java.util.Map;
import java.util.Objects;

/**
 *
 */
public abstract class MetaLabelValueBase implements MetaLabelValue {
    private I18nLabel label;
    private Map labels;

    protected abstract R root();

    /**
     * 主对象对应的标签
     *
     * @return
     */
    @Override
    public String label() {
        if (this.label == null) return this.name();
        String lb = this.label.label();
        return (lb != null) ? lb : this.name();
    }

    /**
     * 主对象对应的标签 按语区获取
     *
     * @param locale
     * @return
     */
    @Override
    public String label(String locale) {
        if (this.label == null) return this.name();
        String lb = this.label.label(locale);
        return (lb != null) ? lb : this.name();
    }

    /**
     * 主对象对应的标签 按语区获取
     *
     * @param locale
     * @return
     */
    @Override
    public String label(Locale locale) {
        if (this.label == null) return this.name();
        String lb = this.label.label(locale);
        return (lb != null) ? lb : this.name();
    }

    /**
     * 全部 标签
     *
     * @return
     */
    @Override
    public Map labels() {
        return Maps.immmap(this.labels);
    }

    /**
     * 值对应的标签
     *
     * @param value
     * @return
     */
    @Override
    public String valueLabel(String value) {
        if (value == null || this.labels == null) return null;
        I18nLabel l = this.labels.get(this.name() + "." + value);
        if (l == null) return null;
        return l.label();
    }

    /**
     * 值对应的标签 带语区
     *
     * @param locale
     * @param value
     * @return
     */
    @Override
    public String valueLabel(String locale, String value) {
        if (value == null || this.labels == null) return null;
        I18nLabel l = this.labels.get(this.name() + "." + value);
        if (l == null) return null;
        return l.label(locale);
    }

    /**
     * 此方法用于内部机制 不允许直接调用
     *
     * @param label
     * @return
     */
    public R withLabel(String label) {
        if (this.label == null) this.label = new I18nLabel();
        this.label.add(label);
        return this.root();
    }

    /**
     * 此方法用于内部机制 不允许直接调用
     * 
     * 注意，本方法每次调用均复制原内容并生成不可变实例，所以如果要批量增加请使用批量方法
     *
     * @param name
     * @param labels
     * @return
     */
    public R withLabels(String name, Map labels) {
        if (labels == null) return this.root();
        if (Strs.isBlank(name)) {
            if (this.label == null) this.label = new I18nLabel();
            this.label.addAll(labels);
        } else {
            if (this.labels == null) this.labels = new SafeMap<>();

            I18nLabel i18n = this.labels.computeIfAbsent(name, k -> new I18nLabel());
            i18n.addAll(labels);
        }
        return this.root();
    }

    /**
     * 此方法用于内部机制 不允许直接调用
     *
     * @param labels
     * @return
     */
    public R withLabels(Map> labels) {
        return this.withLabels(labels, false);
    }

    /**
     * 此方法用于内部机制 不允许直接调用
     * 
     * 因每次增加均应用了不可变实例，所以如果有批量记录需要添加请使用本方法
     *
     * @param labels
     * @param overwrite
     * @return
     */
    public R withLabels(Map> labels, boolean overwrite) {
        Map map = new SafeMap<>((this.labels == null || overwrite) ? Maps.immmap() : this.labels);
        if (labels != null) labels.forEach((k, v) -> {
            if (Strs.isBlank(k)) {
                if (this.label == null) this.label = new I18nLabel();
                this.label.addAll(v);
            } else {
                I18nLabel i18n = map.computeIfAbsent(k, m -> new I18nLabel());
                i18n.addAll(v);
            }
        });

        this.labels = map;
        return this.root();
    }

    public I18nLabel getLabel() {
        return label;
    }

    public void setLabel(I18nLabel label) {
        this.label = label;
    }

    public Map getLabels() {
        return labels;
    }

    public void setLabels(Map labels) {
        this.labels = new SafeMap<>(Maps.immmap(labels));
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        MetaLabelValueBase metaLabel = (MetaLabelValueBase) o;
        return Objects.equals(this.name(), metaLabel.name()) &&
                Objects.equals(label, metaLabel.label) &&
                Objects.equals(labels, metaLabel.labels);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name(), label, labels);
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this)
                .append("name", this.name())
                .append("label", label)
                .append("labels", labels)
                .toString();
    }
}