using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using Wayne.ForecourtControl;
using Wayne.Lib.IO;

namespace LSForecourtSimulatorImpl
{
    /// <summary>
    /// Hardcoded temporary solution!
    /// </summary>
    public class FuelModeAndPriceModeConfig : IForecourtConfiguration
    {
        private readonly IFileSupport fileSupport;
        private XmlDocument xmlDocument;

        public FuelModeAndPriceModeConfig(IFileSupport fileSupport)
        {
            this.fileSupport = fileSupport;
            ReadConfig(@"c:\Wayne\Config\FuelModeConfig\FuelModeConfig.xml");
        }

        public FuelModeAndPriceModeConfig(string configFilePath, IFileSupport fileSupport)
        {
            this.fileSupport = fileSupport;
            ReadConfig(configFilePath);
        }

        private void ReadConfig(string filePath)
        {
            xmlDocument = new XmlDocument();

            fileSupport.LoadXml(xmlDocument, filePath, Encoding.UTF8);
        }

        #region Implementation of IForecourtConfiguration

        public IEnumerable<IPumpConfiguration> Pumps { get; private set; }
        public IEnumerable<ITankConfiguration> Tanks { get; private set; }
        public IEnumerable<ITankSuctionConfiguration> TankSuctions { get; private set; }
        public IEnumerable<IFuelProductConfiguration> Products { get; private set; }
        public IEnumerable<IFuelGradeConfiguration> Grades { get; private set; }

        public IEnumerable<IFuelGradeConfiguration> GetPumpGrades(IDeviceIndex pump)
        {
            throw new NotImplementedException();
        }

        public IEnumerable<ITankMonitorConfiguration> TankMonitors { get; private set; }
        public IEnumerable<IPricePoleConfiguration> PricePoles { get; private set; }
        public IEnumerable<IFuelPrice> Prices { get; private set; }

        /// <summary>
        /// Gets a fuel mode, given the fuelling type and the price group
        /// </summary>
        /// <param name="fuellingType">The fuelling type</param>
        /// <param name="priceGroup">The price group</param>
        public int GetFuelMode(FuellingType fuellingType, PriceGroup priceGroup)
        {
            try
            {
                var configNode =
                    xmlDocument.SelectSingleNode(
                        string.Concat("/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType[@t='",
                            (int)fuellingType, "']/PriceGroup[@g='", (int)priceGroup) + "']");

                var fm = XmlConvert.ToInt32(configNode.InnerText);

                return fm;
            }
            catch (Exception)
            {
                return 1;
            }
        }


        /// <summary>
        /// Gets a post-paid fuel mode, given the price group and the authorized in advance flag
        /// </summary>
        /// <param name="priceGroup">The price group</param>
        /// <param name="authInAdvance">Authorized in advance flag</param>
        public int GetFuelMode(PriceGroup priceGroup, bool authInAdvance)
        {
            try
            {
                var authType = authInAdvance ? "AuthInAdvance" : "NormalAuth";

                var configNode =
                    xmlDocument.SelectSingleNode(
                        string.Concat("/FuelModeConfig/FuelMode_For_PreAuthorize/" + authType + "/PriceGroup_",
                            (int)priceGroup));

                var fm = Convert.ToInt32(configNode.InnerText);

                return fm;
            }
            catch (Exception)
            {

                return 1;
            }
        }


        /// <summary>
        /// Gets a fuel mode, given the fuelling type
        /// </summary>
        /// <param name="fuellingType">The fuelling type</param>
        public int GetFuelMode(FuellingType fuellingType)
        {
            try
            {
                var configNode =
                    xmlDocument.SelectSingleNode(
                        string.Concat("/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType[@t='",
                            (int)fuellingType) + "']/PriceGroup");

                var fm = Convert.ToInt32(configNode.InnerText);

                return fm;
            }
            catch (Exception)
            {

                return 1;
            }
        }

        /// <summary>
        /// Gets the default fuel mode for the given price group
        /// </summary>
        /// <param name="priceGroup">The price group</param>
        public int GetDefaultFuelMode(PriceGroup priceGroup)
        {
            try
            {
                var configNode =
                    xmlDocument.SelectSingleNode(string.Concat("/FuelModeConfig/DefaultFuelModeTable/PriceGroup_",
                        (int)priceGroup));

                var fm = Convert.ToInt32(configNode.InnerText);

                return fm;
            }
            catch (Exception)
            {

                return 1;
            }
        }


        /// <summary>
        /// Gets a collection of fuel modes, given the price group
        /// </summary>
        /// <param name="priceGroup">The price group</param>
        public IEnumerable<int> GetFuelModes(PriceGroup priceGroup)
        {
            try
            {
                var configNodeList =
                    xmlDocument.SelectNodes(
                        string.Concat(
                            "/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType/PriceGroup[@g='",
                            (int)priceGroup) + "']");

                var fmList = new List<int>();
                foreach (XmlNode xn in configNodeList)
                {
                    fmList.Add(Convert.ToInt32(xn.InnerText));
                }
                return (fmList);
            }
            catch (Exception)
            {

                return new List<int>();
            }
        }

        /// <summary>
        /// Gets the price group related with the given fuel mode
        /// </summary>
        /// <param name="fuelMode">The fuel mode</param>
        public PriceGroup GetPriceGroup(int fuelMode, FuellingType fuellingType)
        {
            try
            {
                var configNodeList =
                    xmlDocument.SelectNodes(
                        string.Concat("/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType[@t='", (int)fuellingType, "']/PriceGroup"));

                foreach (XmlNode xn in configNodeList)
                {
                    var fm = Convert.ToInt32(xn.InnerText);
                    if (fm == fuelMode)
                    {
                        var pgv = Convert.ToInt32(xn.Attributes["g"].Value);
                        var pg = (PriceGroup)pgv;

                        return pg; // found first matching fuel mode
                    }
                }
                return PriceGroup.Unknown;
            }
            catch (Exception)
            {
                return PriceGroup.Unknown;
            }

            return PriceGroup.Unknown;
        }


        /// <summary>
        /// Gets the price groups related with the given fuel mode
        /// </summary>
        /// <param name="fuelMode">The fuel mode</param>
        public IEnumerable<int> GetPriceGroups(int fuelMode)
        {
            try
            {
                XmlNodeList configNodeList =
                    xmlDocument.SelectNodes(
                        "/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType/PriceGroup");

                IList<int> pgList = new List<int>();
                foreach (XmlNode xn in configNodeList)
                {
                    int fm = Convert.ToInt32(xn.InnerText);

                    if (fm == fuelMode)
                    {
                        var pg = Convert.ToInt32(xn.Attributes["g"].Value);
                        pgList.Add(pg);
                    }
                }
                return pgList;
            }
            catch (Exception)
            {
                return new List<int>();
            }
        }

        /// <summary>
        /// Gets the fuelling type related with the given fuel mode and price group
        /// </summary>
        /// <param name="fuelMode">fuel mode</param>
        /// <param name="priceGroup">price group</param>
        public FuellingType GetFuellingType(int fuelMode, PriceGroup priceGroup)
        {
            try
            {
                var configNodeList =
                    xmlDocument.SelectNodes("/FuelModeConfig/FuellingType_PriceGroup_FuelMode_Mapping/FuellingType");


                foreach (XmlNode xn in configNodeList)
                {
                    foreach (XmlElement cn in xn.ChildNodes)
                    {
                        int fm = Convert.ToInt32(cn.InnerText);
                        var pg = Convert.ToInt32(cn.Attributes["g"].Value);

                        if (fm == fuelMode && pg == (int)priceGroup)
                        {
                            var ft = (FuellingType)Convert.ToInt32(xn.Attributes["t"].Value);

                            return ft;
                        }
                    }
                }
                return FuellingType.Unknown;
            }
            catch (Exception)
            {
                return FuellingType.Unknown;
            }
        }

        public bool WriteFuelPrice(int productId, int fuelMode, decimal newPrice)
        {
            return false;
        }

        public event AsyncCompletedEventHandler OnConfigurationChange;

        #endregion
    }
}