using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Diagnostics;
using System.Linq;
using System.Reflection.Metadata.Ecma335;
using System.Text.Json.Serialization;
using System.Threading;
using isnd.Data;
using isnd.Data.Packages;
using isnd.Entities;
using NuGet.Packaging.Core;

namespace isnd.ViewModels
{
    public class PackageSearchResult
    {

        public IEnumerable<Package> GetResults()
        {
            return result;
        }

        private IEnumerable<Package> result=null;

        [JsonIgnore]
        public string ApiBase{get; private set;}

        public PackageSearchResult(string apiBase)
        {
            // empty result
            this.ApiBase = apiBase;

        }

        public PackageSearchResult(IEnumerable<Package> result, string apiBase, int totalHit)
        {
            
            this.result = result;
            this.ApiBase = apiBase;
            
            data = (totalHit>0) ? result.Select(p=> NewPackageHit(apiBase, p)).ToArray()
              : new PackageHit[0];
            this.totalHits = totalHit;
        }

        private static PackageHit NewPackageHit(string apiBase, Package package)
        {
            string regId = $"{apiBase}{ApiConfig.Registration}/{package.Id}/index.json";
            var latest = package.GetLatestVersion();
            if (latest==null) return null;

            var pkgHit = new PackageHit(regId, package.Id,
            latest.NugetVersion.ToString(),
            latest.Description);
            
            if (package.Versions!=null)
            {
                pkgHit.versions = package.Versions
                .Select(v => new SearchVersionInfo(apiBase, v)).ToArray();
                pkgHit.packageTypes = package.Versions.Where(v=> v.Type!=null)
                .Select(v=>new PackageType(v.Type, new System.Version(v.Major,v.Minor,v.Patch, v.Revision)))?.ToArray();
            }
            return pkgHit;
        }

        public PackageHit[] data { get; protected set; } = [];

        public int totalHits { get; set; } = 0;
    }
}