using Org.BouncyCastle.Crypto;
using PKISharp.WACS.Plugins.Interfaces;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;

namespace PKISharp.WACS.DomainObjects
{
    [DebuggerDisplay("Target: {CommonName} ({Parts.Count} part(s) - IIS: {IIS})")]
    public class Target
    {
        public Target(string friendlyName, string commonName, IEnumerable<TargetPart> parts)
        {
            FriendlyName = friendlyName;
            CommonName = commonName;
            Parts = parts;
        }

        /// <summary>
        /// Suggest a FriendlyName for the certificate,
        /// but this may be overruled by the user
        /// </summary>
        public string? FriendlyName { get; set; }

        /// <summary>
        /// CommonName for the certificate
        /// </summary>
        public string CommonName { get; private set; }

        /// <summary>
        /// Different parts that make up this target
        /// </summary>
        public IEnumerable<TargetPart> Parts { get; private set; }

        /// <summary>
        /// Check if all parts are IIS
        /// </summary>
        public bool IIS => Parts.All(x => x.IIS);

        /// <summary>
        /// The CSR used to request the certificate
        /// </summary>
        public byte[]? CsrBytes { get; set; }

        /// <summary>
        /// The Private Key corresponding to the CSR
        /// </summary>
        public AsymmetricKeyParameter? PrivateKey { get; set; }

        /// <summary>
        /// Pretty print information about the target
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            var x = new StringBuilder();
            x.Append(CommonName);
            var alternativeNames = Parts.SelectMany(p => p.Identifiers).Distinct();
            if (alternativeNames.Count() > 1)
            {
                x.Append($" and {alternativeNames.Count() - 1} alternatives");
            }
            return x.ToString();
        }
    }

    [DebuggerDisplay("Target: null")]
    public class NullTarget : Target, INull
    {
        public NullTarget() : base("", "", new List<TargetPart>()) { }
    }
}