part of 'firo_cache.dart';

/// Keep all fetch queries in this separate file
abstract class _Reader {
  // ===========================================================================
  // =============== Spark anonymity set queries ===============================

  static Future<ResultSet> _getSetCoinsForGroupId(
    int groupId, {
    required Database db,
    int? newerThanTimeStamp,
  }) async {
    String query = """
      SELECT sc.serialized, sc.txHash, sc.context
      FROM SparkSet AS ss
      JOIN SparkSetCoins AS ssc ON ss.id = ssc.setId
      JOIN SparkCoin AS sc ON ssc.coinId = sc.id
      WHERE ss.groupId = $groupId
    """;

    if (newerThanTimeStamp != null) {
      query += " AND ss.timestampUTC"
          " > $newerThanTimeStamp";
    }

    return db.select("$query;");
  }

  static Future<ResultSet> _getLatestSetInfoForGroupId(
    int groupId, {
    required Database db,
  }) async {
    final query = """
      SELECT ss.blockHash, ss.setHash, ss.timestampUTC
      FROM SparkSet ss
      WHERE ss.groupId = $groupId
      ORDER BY ss.timestampUTC DESC
      LIMIT 1;
    """;

    return db.select("$query;");
  }

  static Future<bool> _checkSetInfoForGroupIdExists(
    int groupId, {
    required Database db,
  }) async {
    final query = """
      SELECT EXISTS (
        SELECT 1
        FROM SparkSet
        WHERE groupId = $groupId
      ) AS setExists;
    """;

    return db.select("$query;").first["setExists"] == 1;
  }

  // ===========================================================================
  // =============== Spark used coin tags queries ==============================

  static Future<ResultSet> _getSparkUsedCoinTags(
    int startNumber, {
    required Database db,
  }) async {
    String query = """
      SELECT tag
      FROM SparkUsedCoinTags
    """;

    if (startNumber > 0) {
      query += " WHERE id >= $startNumber";
    }

    return db.select("$query;");
  }

  static Future<ResultSet> _getUsedCoinTagsCount({
    required Database db,
  }) async {
    const query = """
      SELECT COUNT(*) AS count
      FROM SparkUsedCoinTags;
    """;

    return db.select("$query;");
  }

  static Future<bool> _checkTagIsUsed(
    String tag, {
    required Database db,
  }) async {
    final query = """
      SELECT EXISTS (
        SELECT 1
        FROM SparkUsedCoinTags
        WHERE tag = '$tag'
      ) AS tagExists;
    """;

    return db.select("$query;").first["tagExists"] == 1;
  }
}