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package com.kintone.client;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.kintone.client.model.app.report.EveryQuarterPeriod;
import com.kintone.client.model.app.report.IntervalType;
import java.io.IOException;
import java.time.format.DateTimeFormatter;
import java.util.function.Function;

class EveryQuarterPeriodSerializer extends StdSerializer {

    private static final long serialVersionUID = -2575834834468053522L;
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm");

    EveryQuarterPeriodSerializer() {
        this(null);
    }

    protected EveryQuarterPeriodSerializer(Class t) {
        super(t);
    }

    @Override
    public void serialize(EveryQuarterPeriod value, JsonGenerator gen, SerializerProvider provider)
            throws IOException {
        gen.writeStartObject();
        gen.writeStringField("every", IntervalType.QUARTER.toString());
        writeField(gen, "pattern", value.getPattern(), v -> v.toString());
        if (value.isEndOfMonth()) {
            gen.writeStringField("dayOfMonth", JsonConstants.END_OF_MONTH);
        } else {
            writeField(gen, "dayOfMonth", value.getDayOfMonth(), v -> Integer.toString(v));
        }
        writeField(gen, "time", value.getTime(), v -> v.format(TIME_FORMATTER));
        gen.writeEndObject();
    }

    private  void writeField(JsonGenerator gen, String field, T value, Function func)
            throws IOException {
        if (value == null) {
            gen.writeNullField(field);
        } else {
            gen.writeStringField(field, func.apply(value));
        }
    }
}