/* ParameterDictionary.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015-2017 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.IO;
using zaaReloaded2.LabModel;

namespace zaaReloaded2.Thesaurus
{
    /// <summary>
    /// Thesaurus that is used to convert Lauris parameter names to
    /// canonical parameter names, and to assign categories and determine
    /// which parameters always require the output of reference intervals.
    /// </summary>
    public class Parameters : ThesaurusBase
    {
        #region Singleton

        private static readonly Parameters _default = new Parameters();

        /// <summary>
        /// Gets the default singleton instance of the Parameters
        /// thesaurus.
        /// </summary>
        /// <remarks>
        /// http://csharpindepth.com/Articles/General/Singleton.aspx#cctor
        /// </remarks>
        public static Parameters Default { get { return _default; } }

        static Parameters() { }
        private Parameters() { }

        #endregion

        #region Public methods

        /// <summary>
        /// Looks up the canonical name for a given <paramref name="laurisName"/>.
        /// </summary>
        /// <param name="laurisName">Lauris item name to look up.</param>
        /// <returns>Canonical name, or original Lauris name if no canonical name
        /// is defined for this item.</returns>
        public string GetCanonicalName(string laurisName)
        {
            return LookUpValue(laurisName, 1, laurisName);
        }

        /// <summary>
        /// Looks up the material for a given <paramref name="laurisName"/>.
        /// </summary>
        /// <param name="laurisName">Lauris item name to look up.</param>
        /// <returns><see cref="zaaReloaded2.LabModel.Material"/> enum; if no material is
        /// found in the dictionary, the default material "S" (serum) is returned.</returns>
        public Material GetMaterial(string laurisName, Material def)
        {
            string textValue = LookUpValue(laurisName, 2);
            if (String.IsNullOrEmpty(textValue))
            {
                return def;
            }
            else
            {
                try
                {
                    return MaterialFactory.FromAbbreviation(textValue);
                }
                catch
                {
                    return Material.B;
                }
            }
        }

        /// <summary>
        /// Returns the desired number of decimals for a given parameter.
        /// </summary>
        /// <param name="laurisName">Laboratory item to look up;
        /// this must be an original Lauris string.</param>
        /// <returns>Number of decimals for the parameter, or -1 if
        /// undefined.</returns>
        public int GetPrecision(string laurisName)
        {
            return LookUpValue(laurisName, 3, -1);
        }

        /// <summary>
        /// Returns whether or not reference limits shall always
        /// be displayed for a given item, regardless whether it
        /// is normal or not.
        /// </summary>
        /// <param name="key">Laboratory item to look up; this must
        /// be an original Lauris string.</param>
        /// <returns></returns>
        public bool GetForceReferenceDisplay(string laurisName)
        {
            return LookUpValue(laurisName, 4, false);
        }

        /// <summary>
        /// Checks whether an item is marked as blacklisted in the
        /// thesaurus.
        /// </summary>
        /// <param name="laurisName">Laboratory item to lok up;
        /// this must be an original Lauris string.</param>
        /// <returns>True if the item is marked as blacklisted,
        /// false if not. Default is false.</returns>
        public bool GetIsBlacklisted(string laurisName)
        {
            return LookUpValue(laurisName, 5, false);
        }
        #endregion

        #region Overrides

        /// <summary>
        /// Returns the resource stream for Defaults\parameters.txt.
        /// </summary>
        protected override System.IO.Stream GetDefaultStream()
        {
            return Assembly.GetExecutingAssembly().GetManifestResourceStream(
                "zaaReloaded2.Defaults.parameters.txt");
        }

        /// <summary>
        /// Returns a path to a file parameters.txt in the addin directory
        /// as provided by <see cref="ThisAddin.Subdir"/>.
        /// </summary>
        protected override string GetUserFileName()
        {
            return Path.Combine(ThisAddIn.Subdir, "parameters.txt");
        }

        #endregion
    }
}