using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GreenTree.Nachtragsmanagement.Core.Configuration;
using GreenTree.Nachtragsmanagement.Core.Domain.Config;

namespace GreenTree.Nachtragsmanagement.Services.Configuration
{
    public interface IConfigurationService
    {
        /// <summary>
        /// Reads the current configuration from the global config
        /// </summary>
        AppendixConfigurationSection GetCurrentConfiguration();

        #region ConfigItem

        /// <summary>
        /// Gets all configItems
        /// </summary>
        IList<ConfigItem> GetAllConfigItems();

        /// <summary>
        /// Gets a configItem by specified Id
        /// </summary>
        /// <param name="id">ConfigItem identifier.</param>
        ConfigItem GetConfigItemById(int id);

        /// <summary>
        /// Gets a configItem by specified name
        /// </summary>
        /// <param name="name">ConfigItem name.</param>
        ConfigItem GetConfigItemByName(string name);

        /// <summary>
        /// Gets all configItems to the specified ids
        /// </summary>
        IList<ConfigItem> GetConfigItemsByIds(int[] ids);

        /// <summary>
        /// Insert a configItem
        /// </summary>
        /// <param name="configItem">ConfigItem.</param>
        void InsertConfigItem(ConfigItem configItem);

        /// <summary>
        /// Update a configItem
        /// </summary>
        /// <param name="configItem">ConfigItem.</param>
        void UpdateConfigItem(ConfigItem configItem);

        /// <summary>
        /// Delete a configItem
        /// </summary>
        /// <param name="configItem">ConfigItem.</param>
        void DeleteConfigItem(ConfigItem configItem);

        #endregion

        #region UserConfigItem

        /// <summary>
        /// Gets all userConfigItems
        /// </summary>
        IList<UserConfigItem> GetAllUserConfigItems();

        /// <summary>
        /// Gets a userConfigItem by specified Id
        /// </summary>
        /// <param name="id">UserConfigItem identifier.</param>
        UserConfigItem GetUserConfigItemById(int id);

        /// <summary>
        /// Gets a userConfigItem by specified name and user id
        /// </summary>
        /// <param name="name">UserConfigItem name.</param>
        /// <param name="userId">User Id.</param>
        UserConfigItem GetUserConfigItemByNameAndUserId(string name, int userId);

        /// <summary>
        /// Insert or update a userConfigItem
        /// </summary>
        /// <param name="userConfigItem">UserConfigItem.</param>
        void InsertOrUpdateUserConfigItem(UserConfigItem userConfigItem);

        /// <summary>
        /// Delete a userConfigItem
        /// </summary>
        /// <param name="userConfigItem">UserConfigItem.</param>
        void DeleteUserConfigItem(UserConfigItem userConfigItem);

        #endregion

        #region Casting

        /// <summary>
        /// Trys to convert the config items value type and returns its actual value, otherwise NULL
        /// </summary>
        /// <typeparam name="T">The actual type.</typeparam>
        /// <param name="configItem">ConfigItem.</param>
        /// <param name="defaultValue">Value, when conversion fails.</param>
        T TryGetConfigItemValue<T>(ConfigItem configItem, T defaultValue);

        /// <summary>
        /// Trys to convert the config items value type and returns its actual value, otherwise NULL
        /// </summary>
        /// <typeparam name="T">The actual type.</typeparam>
        /// <param name="configItemName">ConfigItem name.</param>
        /// <param name="defaultValue">Value, when conversion fails.</param>
        T TryGetConfigItemValue<T>(string configItemName, T defaultValue);

        #endregion
    }
}