using System;
using System.Linq;
using CadParamPluging.Domain.Models;

namespace CadParamPluging.Common
{
    public static class TemplateKeyBuilder
    {
        public static string Build(TemplateParams tpl)
        {
            if (tpl == null)
            {
                return null;
            }

            return Build(tpl.ProjectType, tpl.DrawingType, tpl.SheetSize, tpl.Scale);
        }

        public static string Build(string projectType, string drawingType, string sheetSize, string scale)
        {
            var p1 = NormalizeValue(projectType);
            var p2 = NormalizeValue(drawingType);
            var p3 = NormalizeValue(sheetSize);
            var p4 = NormalizeScale(scale);
            return string.Join("|", new[] { p1, p2, p3, p4 });
        }

        private static string NormalizeScale(string s)
        {
            if (string.IsNullOrWhiteSpace(s))
            {
                return string.Empty;
            }

            if (string.Equals(s.Trim(), "无", StringComparison.OrdinalIgnoreCase))
            {
                return string.Empty;
            }

            return NormalizeValue(s);
        }

        private static string NormalizeValue(string s)
        {
            if (string.IsNullOrWhiteSpace(s))
            {
                return string.Empty;
            }

            var trimmed = s.Trim();
            var chars = trimmed.Where(c => !char.IsWhiteSpace(c)).ToArray();
            return new string(chars);
        }
    }
}