using System;
using System.Collections.Generic;

namespace CadParamPluging.Common
{
    public class DropdownOptions
    {
        public List<string> DeliveryStatuses { get; set; }
        public List<string> ProcessMethods { get; set; }
        public List<string> StructuralFeatures { get; set; }
        public List<string> SpecialConditions { get; set; }

        public DropdownOptions()
        {
            DeliveryStatuses = new List<string>();
            ProcessMethods = new List<string>();
            StructuralFeatures = new List<string>();
            SpecialConditions = new List<string>();
        }

        public static DropdownOptions CreateDefault()
        {
            return new DropdownOptions
            {
                DeliveryStatuses = new List<string> { "结构", "示例" },
                ProcessMethods = new List<string> { "基础平面", "示例图" },
                StructuralFeatures = new List<string> { "A1", "A3" },
                SpecialConditions = new List<string> { "无" }
            };
        }

        public DropdownOptions Clone()
        {
            return new DropdownOptions
            {
                DeliveryStatuses = new List<string>(DeliveryStatuses ?? new List<string>()),
                ProcessMethods = new List<string>(ProcessMethods ?? new List<string>()),
                StructuralFeatures = new List<string>(StructuralFeatures ?? new List<string>()),
                SpecialConditions = new List<string>(SpecialConditions ?? new List<string>())
            };
        }

        public void Normalize()
        {
            DeliveryStatuses = NormalizeList(DeliveryStatuses);
            ProcessMethods = NormalizeList(ProcessMethods);
            StructuralFeatures = NormalizeList(StructuralFeatures);
            SpecialConditions = NormalizeList(SpecialConditions);
        }

        private static List<string> NormalizeList(IEnumerable<string> values)
        {
            var result = new List<string>();
            if (values == null)
            {
                return result;
            }

            var seen = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
            foreach (var raw in values)
            {
                var v = (raw ?? string.Empty).Trim();
                if (v.Length == 0)
                {
                    continue;
                }

                if (seen.Add(v))
                {
                    result.Add(v);
                }
            }

            return result;
        }
    }
}