namespace Thor.Shared.Model;

public class TemplateRegister
    : RegisterBase<TemplateEntry, Item>
{
    public List<Item> Forge()
    {
        Dictionary<string, List<TemplateEntry>> entriesByTarget = [];
        foreach (var i in GetEntriesOrdered())
        {
            var target = i.Target;
            if (entriesByTarget.TryGetValue(target, out var list))
                list.Add(i);
            else
                entriesByTarget.Add(target, [i]);
        }

        List<Item> items = [];
        foreach(var kv in entriesByTarget)
        {
            var item = Forge(kv.Key, kv.Value);
            if(item is not null)
                items.Add(item);
        }

        return items.OrderBy(x => x.OrderId).ToList();
    }

    private Item? Forge(string id, IEnumerable<TemplateEntry> entries)
    {
        bool? IsTitle = null;
        string Identifier = id;
        string? ParentId = null;
        string? OrderId = null;
        string? Label = null;
        string? Description = null;
        string? References = null;

        int restauration = 1;
        foreach(var entry in entries)
        {
            if(entry.Type == TemplateEntry.EntryType.Delete)
            {
                restauration--;
                continue;
            }
            if (entry.Type == TemplateEntry.EntryType.Restore)
            {
                restauration++;
                continue;
            }

            //ignore comments

            if (entry.Type != TemplateEntry.EntryType.Set)
                continue;

            if (entry.Field == TemplateEntry.FieldType.Type && IsTitle is null)
                IsTitle = entry.Content == TemplateEntry.TYPE_TITLE;
            else if(entry.Field == TemplateEntry.FieldType.Reference && References is null)
                References = entry.Content;
            else if(entry.Field == TemplateEntry.FieldType.Label && Label is null)
                Label = entry.Content;
            else if(entry.Field == TemplateEntry.FieldType.Parent && ParentId is null)
                ParentId = entry.Content;
            else if(entry.Field == TemplateEntry.FieldType.Description && Description is null)
                Description = entry.Content;
            else if(entry.Field == TemplateEntry.FieldType.Order && OrderId is null)
                OrderId = entry.Content;
        }
        if (IsTitle is null)
            return null;

        Item ret = IsTitle == true ? new ItemTitle() : new ItemVerification();
        ret.Identifier = Identifier;

        ret.ParentId = ParentId ?? String.Empty;
        ret.OrderId = OrderId ?? String.Empty;
        ret.Label = Label ?? String.Empty;
        ret.Description = Description ?? String.Empty;
        ret.References = References ?? String.Empty;

        return ret;
    }
}