using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Npgsql;
using NpgsqlTypes;
using skyscraper5.Dvb.SystemSoftwareUpdate.Model;
using skyscraper5.Skyscraper.Scraper.Storage.Utilities;

namespace skyscraper5.Data.PostgreSql
{
	public partial class PostgresqlDataStore
	{
		private HashSet<DatabaseKeyUntGroup> _knownUntGroups;
		private HashSet<DatabaseKeyUntCompatibility> _knownUntCompatibility;
		private HashSet<DatabaseKeyUntPlatform> _knownUntPlatforms;

		public void StoreUpdateNotification(int hashCode, UpdateNotificationGroup common, Compatibility compatibility, Platform platform)
		{
			if (_knownUntGroups == null)
				_knownUntGroups = new HashSet<DatabaseKeyUntGroup>();
			if (_knownUntCompatibility == null)
				_knownUntCompatibility = new HashSet<DatabaseKeyUntCompatibility>();
			if (_knownUntPlatforms == null)
				_knownUntPlatforms = new HashSet<DatabaseKeyUntPlatform>();

			DatabaseKeyUntPlatform platformCoordinate = new DatabaseKeyUntPlatform(common.ActionType, common.OuiHash,
				common.Oui, common.ProcessingOrder, compatibility.DescriptorType, platform.GetFlagsForSqlKey());
			if (_knownUntPlatforms.Contains(platformCoordinate))
			{
				return;
			}

			EnqueueTask(x => WriteUnt(x, common, compatibility, platform));

			_knownUntPlatforms.Add(platformCoordinate);
		}

		private void WriteUnt(NpgsqlConnection connection, UpdateNotificationGroup common, Compatibility compatibility,
			Platform platform)
		{
			if (!TestForUnt(connection, common))
				InsertUnt(connection, common);

			if (!TestForUntCompat(connection, common, compatibility))
				InsertUntCompat(connection, common, compatibility);

			if (!TestForUntCompatPlatform(connection, common, compatibility, platform))
				InsertUntCompatPlatform(connection, common, compatibility, platform);
		}

		private bool TestForUnt(NpgsqlConnection connection, UpdateNotificationGroup common)
		{
			DatabaseKeyUntGroup groupCoordinate =
				new DatabaseKeyUntGroup(common.ActionType, common.OuiHash, common.Oui, common.ProcessingOrder);
			if (_knownUntGroups.Contains(groupCoordinate))
				return true;

			NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"SELECT dateadded FROM dvb_unt WHERE action_type = @action_type AND oui_hash = @oui_hash AND oui = @oui AND processing_order = @processing_order";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			NpgsqlDataReader mySqlDataReader = command.ExecuteReader();
			bool read = mySqlDataReader.Read();
			if (read)
				_knownUntGroups.Add(groupCoordinate);
			mySqlDataReader.Close();
			return read;
		}

		private void InsertUnt(NpgsqlConnection connection, UpdateNotificationGroup common)
		{
			NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"INSERT INTO dvb_unt (action_type, oui_hash, oui, processing_order, data_broadcast_id, association_tag, private_data, update_flag, update_method, update_priority) " +
				"VALUES (@action_type, @oui_hash, @oui, @processing_order, @data_broadcast_id, @association_tag, @private_data, @update_flag, @update_method, @update_priority)";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			command.Parameters.AddParameter("@data_broadcast_id", NpgsqlDbType.Integer, common.DataBroadcastId);
			command.Parameters.AddParameter("@association_tag", NpgsqlDbType.Integer, common.AssociationTag);
			command.Parameters.AddParameter("@private_data", NpgsqlDbType.Bytea, common.PrivateData);
			command.Parameters.AddParameter("@update_flag", NpgsqlDbType.Integer, common.UpdateFlag);
			command.Parameters.AddParameter("@update_method", NpgsqlDbType.Integer, common.UpdateMethod);
			command.Parameters.AddParameter("@update_priority", NpgsqlDbType.Integer, common.UpdatePriority);
			command.Parameters.CheckNulls();
			command.ExecuteNonQuery();

			DatabaseKeyUntGroup groupCoordinate =
				new DatabaseKeyUntGroup(common.ActionType, common.OuiHash, common.Oui, common.ProcessingOrder);
			_knownUntGroups.Add(groupCoordinate);
		}

		private bool TestForUntCompat(NpgsqlConnection connection, UpdateNotificationGroup common,
			Compatibility compatibility)
		{
			DatabaseKeyUntCompatibility compatibilityCoordinate = new DatabaseKeyUntCompatibility(common.ActionType,
				common.OuiHash, common.Oui, common.ProcessingOrder, compatibility.DescriptorType);
			if (_knownUntCompatibility.Contains(compatibilityCoordinate))
				return true;

			NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"SELECT dateadded FROM dvb_unt_compatibility WHERE " +
				"action_type = @action_type AND oui_hash = @oui_hash AND oui = @oui AND processing_order = @processing_order AND descriptor_type = @descriptor_type";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer,common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			command.Parameters.AddParameter("@descriptor_type", NpgsqlDbType.Integer, compatibility.DescriptorType);
			NpgsqlDataReader dataReader = command.ExecuteReader();
			bool result = dataReader.Read();
			if (result)
				_knownUntCompatibility.Add(compatibilityCoordinate);
			dataReader.Close();
			return result;
		}

		private void InsertUntCompat(NpgsqlConnection connection, UpdateNotificationGroup common,
			Compatibility compatibility)
		{
			NpgsqlCommand preCommand = connection.CreateCommand();
			preCommand.CommandText = "SELECT dateadded FROM dvb_unt_compatibility WHERE action_type = @atype AND oui_hash = @ohash AND oui = @oui AND processing_order = @porder AND descriptor_type = @dtype";
            preCommand.Parameters.AddParameter("@atype", NpgsqlDbType.Integer, common.ActionType);
            preCommand.Parameters.AddParameter("@ohash", NpgsqlDbType.Integer, common.OuiHash);
            preCommand.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
            preCommand.Parameters.AddParameter("@porder", NpgsqlDbType.Integer, common.ProcessingOrder);
            preCommand.Parameters.AddParameter("@dtype", NpgsqlDbType.Integer, compatibility.DescriptorType);
			NpgsqlDataReader dataReader = preCommand.ExecuteReader();
			bool alreadyKnown = dataReader.Read();
			dataReader.Close();
			preCommand.Dispose();
			if (alreadyKnown)
				return;

            NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"INSERT INTO dvb_unt_compatibility (action_type, oui_hash, oui, processing_order, descriptor_type, private_data, specifier_type, specifier_data, model, version) " +
				"VALUES (@action_type, @oui_hash, @oui, @processing_order, @descriptor_type, @private_data, @specifier_type, @specifier_data, @model, @version)";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			command.Parameters.AddParameter("@descriptor_type", NpgsqlDbType.Integer, compatibility.DescriptorType);
			command.Parameters.AddParameter("@private_data", NpgsqlDbType.Bytea, compatibility.PrivateData);
			command.Parameters.AddParameter("@specifier_type", NpgsqlDbType.Integer, compatibility.SpecifierType);
			command.Parameters.AddParameter("@specifier_data", NpgsqlDbType.Text, compatibility.SpecifierData);
			command.Parameters.AddParameter("@model",NpgsqlDbType.Integer, compatibility.Model);
			command.Parameters.AddParameter("@version", NpgsqlDbType.Integer, compatibility.Version);
			command.Parameters.CheckNulls();
			command.ExecuteNonQuery();
			_knownUntCompatibility.Add(new DatabaseKeyUntCompatibility(common.ActionType, common.OuiHash, common.Oui,
				common.ProcessingOrder, compatibility.DescriptorType));
		}

		private bool TestForUntCompatPlatform(NpgsqlConnection connection, UpdateNotificationGroup common,
			Compatibility compatibility, Platform platform)
		{
			int sqlKey = platform.GetFlagsForSqlKey();
			DatabaseKeyUntPlatform platformCoordinate = new DatabaseKeyUntPlatform(common.ActionType, common.OuiHash,
				common.Oui, common.ProcessingOrder, compatibility.DescriptorType, sqlKey);

			NpgsqlCommand command = transaction.Connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"SELECT dateadded FROM dvb_unt_compatibility_platform WHERE action_type = @action_type AND oui_hash = @oui_hash AND oui = @oui AND processing_order = @processing_order " +
				"AND descriptor_type = @descriptor_type AND platform_type_bitmask = @platform_type_bitmask";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			command.Parameters.AddParameter("@descriptor_type", NpgsqlDbType.Integer, compatibility.DescriptorType);
			command.Parameters.AddParameter("@platform_type_bitmask", NpgsqlDbType.Integer, sqlKey);
			NpgsqlDataReader dataReader = command.ExecuteReader();
			bool result = dataReader.Read();
			if (result)
				_knownUntPlatforms.Add(platformCoordinate);
			dataReader.Close();
			return result;
		}

		private void InsertUntCompatPlatform(NpgsqlConnection connection, UpdateNotificationGroup common,
			Compatibility compatibility, Platform platform)
		{
			int sqlKey = platform.GetFlagsForSqlKey();
			DatabaseKeyUntPlatform platformCoordinate = new DatabaseKeyUntPlatform(common.ActionType, common.OuiHash,
				common.Oui, common.ProcessingOrder, compatibility.DescriptorType, sqlKey);

			NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"INSERT INTO dvb_unt_compatibility_platform (action_type, oui_hash, oui, processing_order, descriptor_type, platform_type_bitmask, update_flag, update_method, update_priority, data_broadcast_id, association_tag, private_data, smart_card_number, super_ca_system_id, serial_data, mac_address_mask, subgroup_tag) " +
				"VALUES (@action_type, @oui_hash, @oui, @processing_order, @descriptor_type, @platform_type_bitmask, @update_flag, @update_method, @update_priority, @data_broadcast_id, " +
				" @association_tag, @private_data, @smart_card_number, @super_ca_system_id, @serial_data, @mac_address_mask, @subgroup_tag)";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, common.ActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, common.OuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, common.Oui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, common.ProcessingOrder);
			command.Parameters.AddParameter("@descriptor_type", NpgsqlDbType.Integer, compatibility.DescriptorType);
			command.Parameters.AddParameter("@platform_type_bitmask", NpgsqlDbType.Integer, sqlKey);
			command.Parameters.AddParameter("@update_flag", NpgsqlDbType.Integer, platform.UpdateFlag);
			command.Parameters.AddParameter("@update_method", NpgsqlDbType.Integer, platform.UpdateMethod);
			command.Parameters.AddParameter("@update_priority", NpgsqlDbType.Integer, platform.UpdatePriority);
			command.Parameters.AddParameter("@data_broadcast_id", NpgsqlDbType.Integer, platform.DataBroadcastId);
			command.Parameters.AddParameter("@association_tag", NpgsqlDbType.Integer, platform.AssociationTag);
			command.Parameters.AddParameter("@private_data", NpgsqlDbType.Bytea, platform.PrivateData);
			command.Parameters.AddParameter("@smart_card_number", NpgsqlDbType.Text, platform.SmartCardNumber);
			command.Parameters.AddParameter("@super_ca_system_id", NpgsqlDbType.Bigint, platform.SuperCaSystemId);
			command.Parameters.AddParameter("@serial_data", NpgsqlDbType.Bytea, platform.SerialData);
			command.Parameters.AddParameter("@mac_address_mask", NpgsqlDbType.Varchar, platform.MacAddressMask);
			command.Parameters.AddParameter("@subgroup_tag", NpgsqlDbType.Bytea, platform.SubgroupTag);
			command.ExecuteNonQuery();

			InsertUntCompatPlatformMacAddressMatches(connection, platformCoordinate, platform);
			_knownUntPlatforms.Add(platformCoordinate);
		}

		private void InsertUntCompatPlatformMacAddressMatches(NpgsqlConnection connection,
			DatabaseKeyUntPlatform platformCoordinate, Platform platform)
		{
			if (platform.MacAddressMatches == null)
				return;

			if (platform.MacAddressMatches.Length == 0)
				return;

			NpgsqlCommand command = connection.CreateCommand();
			command.Transaction = transaction;
			command.CommandText =
				"INSERT INTO dvb_unt_compatibility_platform_mac_address_matches (action_type, oui_hash, oui, processing_order, descriptor_type, platform_type_bitmask, mac_match) " +
				"VALUES (@action_type, @oui_hash, @oui, @processing_order, @descriptor_type, @platform_type_bitmask, @mac_match)  ";
			command.Parameters.AddParameter("@action_type", NpgsqlDbType.Integer, platformCoordinate.CommonActionType);
			command.Parameters.AddParameter("@oui_hash", NpgsqlDbType.Integer, platformCoordinate.CommonOuiHash);
			command.Parameters.AddParameter("@oui", NpgsqlDbType.Varchar, platformCoordinate.CommonOui);
			command.Parameters.AddParameter("@processing_order", NpgsqlDbType.Integer, platformCoordinate.CommonProcessingOrder);
			command.Parameters.AddParameter("@descriptor_type", NpgsqlDbType.Integer, platformCoordinate.CompatibilityDescriptorType);
			command.Parameters.AddParameter("@platform_type_bitmask", NpgsqlDbType.Integer, platformCoordinate.PlatformKey);
			command.Parameters.Add("@mac_match", NpgsqlDbType.Varchar);

			foreach (string match in platform.MacAddressMatches)
			{
				command.Parameters["@mac_match"].Value = match;
				command.ExecuteNonQuery();
			}
		}
	}
}