using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Reflection;

namespace Strata.RxNorm.Biz.Test.Unit.Extensions
{
    [ExcludeFromCodeCoverage]
    public static class ResourceExtensions
    {

        public static IEnumerable<string> LoadRxnNorm(this Assembly assembly, string fileName)
        {
            var path = assembly.resourceName(fileName);
            return assembly.ReadAllResourceLines(path);
        }

        public static string resourceName(this Assembly assembly, string fileName)
            => assembly.GetManifestResourceNames().Single(str => str.EndsWith(fileName));

        public static string[] ReadAllResourceLines(this Assembly assembly, string resourceName)
        {
            using Stream stream = assembly.GetManifestResourceStream(resourceName);
            using StreamReader reader = new StreamReader(stream);
            return EnumerateLines(reader).ToArray();
        }

        public static IEnumerable<string> EnumerateLines(TextReader reader)
        {
            string line;

            while ((line = reader.ReadLine()) != null)
            {
                yield return line;
            }
        }
    }
}