package com.camilstaps.taize;

import org.json.JSONException;

import java.text.ParseException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.camilstaps.common.Date;
import com.camilstaps.common.DatedString;

/**
 * A daily reading is linked to a Date
 * @author Camil Staps
 */
public class DailyReading extends DatedString {

    public DailyReading(Date date, String string) {
        super(date, string);
    }

    /**
     * Get the text without the Bible reference on the end
     * @return
     */
    public String getTextWithoutReference() {
        Matcher bible_ref_m = referenceMatcher();

        if (bible_ref_m.find()) {
            return string.substring(0, bible_ref_m.start() - 1);
        } else {
            return string;
        }
    }

    /**
     * Get the Bible reference on the end
     * @return
     */
    public BibleText getBibleReference() {
        final Matcher bible_ref_m = referenceMatcher();

        if (!bible_ref_m.find()) {
            return null;
        }

        if (bible_ref_m.group(3) == null) {
            return new BibleText(bible_ref_m.group(1), Integer.parseInt(bible_ref_m.group(2)));
        } else {
            return new BibleText(bible_ref_m.group(1), Integer.parseInt(bible_ref_m.group(2)), Integer.parseInt(bible_ref_m.group(3)), Integer.parseInt(bible_ref_m.group(2)), Integer.parseInt(bible_ref_m.group(4)));
        }
    }

    /**
     * A regex matcher to find the Bible reference
     * @return
     */
    private Matcher referenceMatcher() {
        Pattern bible_ref = Pattern.compile("\\((\\d? ?[a-zA-Z]+) (\\d{1,3})(?::|,)?(\\d+)?-?(\\d+?)?\\)");
        return bible_ref.matcher(string);
    }

    /**
     * Parse a JSON-encoded DailyReading to a DailyReading
     * @param s the JSON-encoded dailyReading
     * @return
     * @throws JSONException if the string is no valid JSON
     * @throws ParseException if the date in the JSON is no valid Date
     */
    public static DailyMeditation fromString(String s) throws JSONException, ParseException {
        return (DailyMeditation) DatedString.fromString(s, DailyMeditation.class);
    }
}