using System;
using System.IO;
using System.Collections.Generic;

namespace ln.templates.elements
{
    public class IncludeElement : Element
    {
        Expression TargetExpression { get; set; }

        public IncludeElement(ContainerElement container,Expression targetExpression)
            :base(container)
        {
            TargetExpression = targetExpression;
        }

        public void Generate(TextWriter writer, Template.Context context,String templatePath)
        {
            Template iTemplate = context.Provider.FindTemplate(templatePath);
            Template.Context iContext = new Template.Context(context, null);
            String iContent = iTemplate.Generate(iContext);

            writer.Write(iContent);
        }

        public override void Generate(TextWriter writer, Template.Context context)
        {
            object target = TargetExpression.Evaluate(context.ExpressionContext);

            if (target is IEnumerable<String>)
            {
                IEnumerable<String> targets = (IEnumerable<String>)target;
                foreach (String t in targets)
                {
                    Generate(writer, context, t);
                }
            }
            else
            {
                Generate(writer, context, target as String);
            }

        }
    }
}