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

namespace CadParamPluging.Data
{
    public class DefaultTemplateRepository : ITemplateRepository
    {
        private readonly List<TemplateDefinition> _templates;

        public DefaultTemplateRepository()
        {
            _templates = new List<TemplateDefinition>
            {
                new TemplateDefinition
                {
                    ProjectType = "结构",
                    DrawingType = "基础平面",
                    SheetSize = "A1",
                    Scale = "1:50",
                    FilePath = "C\\CadTemplates\\Stru_Base_A1_50.dwt",
                    Description = "结构基础平面 A1 1:50"
                },
                new TemplateDefinition
                {
                    ProjectType = "示例",
                    DrawingType = "示例图",
                    SheetSize = "A3",
                    Scale = "1:100",
                    FilePath = "C\\CadTemplates\\Sample_A3_100.dwt",
                    Description = "示例模板 A3 1:100"
                }
            };
        }

        public TemplateDefinition FindTemplate(TemplateParams templateParams)
        {
            if (templateParams == null)
            {
                return null;
            }

            var matches = _templates.Where(t => Matches(t.ProjectType, templateParams.ProjectType)
                                             && Matches(t.DrawingType, templateParams.DrawingType)
                                             && Matches(t.SheetSize, templateParams.SheetSize)
                                             && Matches(t.Scale, templateParams.Scale))
                                     .ToList();

            if (matches.Count == 1)
            {
                return matches.First();
            }

            return null;
        }

        private static bool Matches(string source, string input)
        {
            if (string.IsNullOrWhiteSpace(input))
            {
                return true;
            }

            return source != null && input != null && source.Equals(input, StringComparison.OrdinalIgnoreCase);
        }
    }
}