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package org.apache.james.mailbox.model;

import java.io.Serializable;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Function;

import org.apache.james.core.quota.QuotaLimitValue;

import com.google.common.base.MoreObjects;

public class SerializableQuotaLimitValue> implements Serializable {

    public static > SerializableQuotaLimitValue valueOf(Optional input) {
        return new SerializableQuotaLimitValue<>(input.orElse(null));
    }

    public static final long UNLIMITED = -1;

    private static > Long encodeAsLong(U quota) {
        if (quota.isLimited()) {
            return quota.asLong();
        }
        return UNLIMITED;
    }

    private final Long value;

    public SerializableQuotaLimitValue(T value) {
        this(encodeAsLong(value));
    }

    SerializableQuotaLimitValue(Long value) {
        this.value = value;
    }

    public Long encodeAsLong() {
        return value;
    }

    public Optional toValue(Function factory, T unlimited) {
        Long longValue = encodeAsLong();
        if (longValue == null) {
            return Optional.empty();
        }
        if (longValue == UNLIMITED) {
            return Optional.of(unlimited);
        }
        return Optional.of(factory.apply(longValue));
    }

    @Override
    public boolean equals(Object o) {
        if (o instanceof SerializableQuotaLimitValue) {
            SerializableQuotaLimitValue that = (SerializableQuotaLimitValue) o;
            return Objects.equals(value, that.value);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Objects.hash(value);
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
            .add("value", value)
            .toString();
    }
}