using System;
using System.Collections.Generic;
using InABox.Core;
using Scriban;
using Scriban.Runtime;

namespace PRSDesktop
{
    public static class DataModelUtils
    {
        public static string ParseTemplate(DataModel model, string data)
        {
            if (string.IsNullOrWhiteSpace(data))
                return "";

            var template = Template.Parse(data);
            if (template.HasErrors) throw new Exception(string.Join("\n", template.Messages));

            var templatecontext = new TemplateContext
            {
                MemberRenamer = member => member.Name
            };

            var so = new ScriptObject();
            ScriptObjectExtensions.Import(so, "string.to_base64", new Func<byte[], string>(b => Convert.ToBase64String(b)));

            var tables = model.AsDictionary;
            foreach (var key in tables.Keys)
            {
                var objects = new List<object>();
                foreach (var tablerow in tables[key].Rows)
                    objects.Add(tablerow.ToObject(key));
                so.Add(key.Name, objects);
            }

            templatecontext.PushGlobal(so);
            return template.Render(templatecontext);
        }
    }
}