using C4IT.XML;
using F4SD.ActionConnector.Enumerations;
using System;
using System.Collections.Generic;
using System.Xml;
using static C4IT.Logging.cLogManager;

namespace F4SD.ActionConnector.Models
{
    public sealed class QuickActionDefinition : ActionDefinitionBase
    {
        private const string ParametersNodeName = "Parameters";
        private const string ParameterNodeName = "Parameter";

        public override ActionType Type => ActionType.QuickAction;

        /// <summary>
        /// Reference to the Quick Action to invoke, e.g. "Protocol case in JIRA".
        /// </summary>
        public string QuickActionRef { get; internal set; }

        public IDictionary<string, string> Parameters { get; private set; } = new Dictionary<string, string>();

        internal QuickActionDefinition(XmlElement xNode, cXmlParser parser) : base(xNode, parser)
        {
            try
            {
                if (!IsValid) return; else IsValid = false;

                XmlNode quickActionRefNode = xNode.SelectSingleNode("QuickActionRef");
                if (quickActionRefNode is null)
                    return;

                QuickActionRef = cXmlParser.GetInnerTextFromXmlElement(quickActionRefNode);

                if (QuickActionRef is null)
                    return;

                XmlNode parametersNode = xNode.SelectSingleNode(ParametersNodeName);
                if (parametersNode != null && parametersNode is XmlElement paramtersNodeElement)
                    ParseParametersElement(paramtersNodeElement, parser);

                IsValid = true;
            }
            catch (Exception ex)
            {
                LogException(ex);
            }
        }

        private void ParseParametersElement(XmlElement parametersNodeElement, cXmlParser parser)
        {
            try
            {
                parser.EnterElement(ParametersNodeName);

                XmlNodeList parameterNodes = parametersNodeElement.SelectNodes(ParameterNodeName);

                if (parameterNodes?.Count > 0)
                    parser.EnterElement(ParameterNodeName);

                foreach (XmlElement parameterNode in parameterNodes)
                {
                    ParseParameterElement(parameterNode, parser);
                }

                if (parameterNodes?.Count > 0)
                    parser.LeaveElement(ParameterNodeName);
            }
            catch (Exception ex)
            {
                LogException(ex);
            }
            finally
            {
                parser.LeaveElement(ParametersNodeName);
            }
        }

        private void ParseParameterElement(XmlElement parameterNode, cXmlParser parser)
        {
            try
            {
                string parameterName = cXmlParser.GetStringFromXmlAttribute(parameterNode, "Name");
                string parameterVariable = cXmlParser.GetInnerTextFromXmlElement(parameterNode);

                if (string.IsNullOrEmpty(parameterName) || string.IsNullOrEmpty(parameterVariable))
                    return;

                if (Parameters.ContainsKey(parameterName))
                    LogEntry($"A paramter with name '{parameterName}' does allready exist.", C4IT.Logging.LogLevels.Warning);
                else
                    Parameters.Add(parameterName, parameterVariable);
            }
            catch (Exception ex)
            {
                LogException(ex);
            }
            finally
            {
                parser.SelectElementNext();
            }
        }
    }
}