using System;
namespace ln.identities
{
    public class RoleAssignment
    {
        IIdentityProvider identityProvider;
        public IIdentityProvider IdentityProvider => identityProvider;

        Guid identityUniqueID;
        Guid effectiveIdentityUniqueID;

        public Identity Identity => IdentityProvider.GetIdentity(identityUniqueID); // Identity this Role is assigned to
        public Identity EffectiveIdentity => IdentityProvider.GetIdentity(effectiveIdentityUniqueID); // Identity for that this Role is valid
        public Role Role { get; }   // Role that is assigned

        private RoleAssignment(IIdentityProvider identityProvider)
        {
            this.identityProvider = identityProvider;
        }

        public RoleAssignment(IIdentityProvider identityProvider,Identity identity,Identity effectiveIdentity,Role role)
            :this(identityProvider)
        {
            identityUniqueID = identity.UniqueID;
            effectiveIdentityUniqueID = effectiveIdentity.UniqueID;
            Role = role;
        }

        public override int GetHashCode()
        {
            return EffectiveIdentity.GetHashCode() ^ Role.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            return (obj is RoleAssignment you) &&
                (identityUniqueID.Equals(you.identityUniqueID) && effectiveIdentityUniqueID.Equals(you.effectiveIdentityUniqueID) && Role.Equals(you.Role));
        }

        public override string ToString()
        {
            return string.Format("[RoleAssigment Identity={0} EffectiveIdentity={1} Role={2}]",Identity.IdentityName,EffectiveIdentity.IdentityName,Role);
        }

    }
}