/* © SRSoftware 2025 */
package de.srsoftware.umbrella.message;

import static de.srsoftware.tools.jdbc.Condition.equal;
import static de.srsoftware.tools.jdbc.Query.*;
import static de.srsoftware.umbrella.core.Errors.*;
import static de.srsoftware.umbrella.core.constants.Constants.TABLE_SETTINGS;
import static de.srsoftware.umbrella.core.constants.Field.*;
import static de.srsoftware.umbrella.core.exceptions.UmbrellaException.*;
import static de.srsoftware.umbrella.core.model.Translatable.t;
import static de.srsoftware.umbrella.message.model.Schedule.schedule;
import static java.text.MessageFormat.format;

import de.srsoftware.umbrella.core.constants.Text;
import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
import de.srsoftware.umbrella.core.model.UmbrellaUser;
import de.srsoftware.umbrella.message.model.Instantly;
import de.srsoftware.umbrella.message.model.Settings;
import de.srsoftware.umbrella.message.model.Silent;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Arrays;

public class SqliteMessageDb implements MessageDb{
	private static final System.Logger LOG = System.getLogger(SqliteMessageDb.class.getSimpleName());
	private final Connection db;
	private static final String DB_VERSION = "message_db_version";
	private static final int INITIAL_DB_VERSION = 1;
	private static final String TABLE_SUBMISSIONS = "message_submission";

	public SqliteMessageDb(Connection conn){
		db = conn;
		init();
	}

	private void createSubmissionTable() {
		var createTable = """
CREATE TABLE IF NOT EXISTS {0} ( {1} Integer PRIMARY KEY, {2} VARCHAR(255) NOT NULL);
""";
		try {
			var stmt = db.prepareStatement(format(createTable,TABLE_SUBMISSIONS, USER_ID, VALUE));
			stmt.execute();
			stmt.close();
		} catch (SQLException e) {
			throw failedToCreateTable(TABLE_SUBMISSIONS).causedBy(e);
		}
	}


	private int createSettingsTable() {
		var createTable = """
CREATE TABLE IF NOT EXISTS {0} ( {1} VARCHAR(255) PRIMARY KEY, {2} VARCHAR(255) NOT NULL);
""";
		try {
			var stmt = db.prepareStatement(format(createTable,TABLE_SETTINGS, KEY, VALUE));
			stmt.execute();
			stmt.close();
		} catch (SQLException e) {
			throw failedToCreateTable(TABLE_SETTINGS).causedBy(e);
		}

		Integer version = null;
		try {
			var rs = select(VALUE).from(TABLE_SETTINGS).where(KEY, equal(DB_VERSION)).exec(db);
			if (rs.next()) version = rs.getInt(VALUE);
			rs.close();
			if (version == null) {
				version = INITIAL_DB_VERSION;
				insertInto(TABLE_SETTINGS, KEY, VALUE).values(DB_VERSION,version).execute(db).close();
			}
			return version;
		} catch (SQLException e) {
			throw databaseException(FAILED_TO_UPDATE_OBJECT, OBJECT,DB_VERSION).causedBy(e);
		}
	}

	private int createTables() {
		createSubmissionTable();
		return createSettingsTable();
	}

	@Override
	public Settings getSettings(UmbrellaUser user) throws UmbrellaException {
		try {
			Settings settings = null;
			var rs = select(VALUE).from(TABLE_SUBMISSIONS).where(USER_ID,equal(user.id())).exec(db);
			if (rs.next()) settings = toSettings(rs);
			rs.close();
			if (settings != null) return settings;
			throw new UmbrellaException(500,"No submission settings stored for {0}",user);
		} catch (SQLException e) {
			throw databaseException(FAILED_TO_LOAD_ENTITIES_OF_OWNER, TYPE,t(Text.SETTINGS), OWNER,user).causedBy(e);
		}
	}

	private void init() {
		var version = createTables();
	}

	private Settings toSettings(ResultSet rs) throws SQLException {
		var submission = rs.getString(VALUE);
		if (submission.trim().equalsIgnoreCase(INSTANTLY)) return new Instantly();
		try {
			var times = Arrays.stream(submission.split(",")).map(Integer::parseInt).toList();
			return schedule(times);
		} catch (NumberFormatException nfe){
			return new Silent();
		}
	}

	@Override
	public Settings update(UmbrellaUser user, Settings settings) throws UmbrellaException {
		try {
			replaceInto(TABLE_SUBMISSIONS, USER_ID, VALUE).values(user.id(),settings.toString()).execute(db).close();
			return settings;
		} catch (SQLException e) {
			throw failedToStoreObject("submission data").causedBy(e);
		}
	}
}