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package com.firefly.utils.json.parser;

import com.firefly.utils.exception.CommonRuntimeException;
import com.firefly.utils.json.JsonReader;
import com.firefly.utils.json.Parser;
import com.firefly.utils.time.SafeSimpleDateFormat;

import java.util.Date;

public class DateParser implements Parser {

    private SafeSimpleDateFormat safeSimpleDateFormat = SafeSimpleDateFormat.defaultDateFormat;

    public DateParser() {
    }

    public DateParser(String datePattern) {
        this.safeSimpleDateFormat = new SafeSimpleDateFormat(datePattern);
    }

    @Override
    public Object convertTo(JsonReader reader, Class clazz) {
        if (reader.isNull())
            return null;

        try {
            reader.mark(1024);
            if (reader.isString()) {
                reader.reset();
                String s = reader.readString();
                return safeSimpleDateFormat.parse(s);
            } else {
                reader.reset();
                long timestamp = reader.readLong();
                return new Date(timestamp);
            }
        } catch (Exception e) {
            throw new CommonRuntimeException(e);
        }
    }

}