using System;
using System.Xml.Linq;

namespace OpenTap.Addin.Reader
{
    public class TestStepListReader : IObjectReader
    {
        static XName testStepName = "TestStep";
        static XName SequenceName = "SequenceName";
        static XName varName = "Variable";
        static XName paramName = "Parameters";
        static XName DebugIds = "DebugIds";

        public override object ReadObject(Type type, XElement element, Action<object> postAction)
        {
            if (type != typeof(TestStepList)) return false;
            var steps = new TestStepList();
            var sequenceNameAttr = element.Attribute(SequenceName);
            steps.SequenceName = sequenceNameAttr?.Value ?? string.Empty;
            foreach (var subnode in element.Elements())
            {
                if (subnode.Name == varName)
                {
                    TestVariable v = (TestVariable)DefaultObjectReader.ReadObject(typeof(TestVariable), subnode, postAction);

                    if (v != null)
                        steps.Variables.Add(v);
                }
                else if (subnode.Name == paramName)
                {
                    TestVariable v = (TestVariable)DefaultObjectReader.ReadObject(typeof(TestVariable), subnode, postAction);
                    if (v != null)
                        steps.Parameters.Add(v);
                }
                else if (subnode.Name == DebugIds)
                {
                    Guid id = (Guid)DefaultObjectReader.ReadObject(typeof(Guid), subnode, postAction);

                    if (id != Guid.Empty)
                        steps.DebugIds.Add(id);
                }
                else
                {
                    ITestStep result = (ITestStep)DefaultObjectReader.ReadObject(typeof(ITestStep), subnode, postAction);
                    if (result != null)
                        steps.Add(result);
                }
            }
            if (postAction != null) postAction(steps);
            return steps;
        }
    }
}