using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;

namespace ln.identities.test
{

    public class TestIdentityProvider : BaseIdentityProvider
    {
        List<Identity> identities = new List<Identity>();
        List<RoleAssignment> roleAssignments = new List<RoleAssignment>();

        public TestIdentityProvider()
        {
        }

        public override Identity CreateIdentity(string identityName)
        {
            Identity identity = new Identity(this, identityName);
            identities.Add(identity);
            return identity;
        }

        public override IEnumerable<KeyValuePair<Guid, string>> GetIdentities() => identities.Select((Identity arg) => new KeyValuePair<Guid, string>(arg.UniqueID, arg.IdentityName));
        public override Identity GetIdentity(Guid uniqueID)
        {
            foreach (Identity identity in identities)
                if (identity.UniqueID.Equals(uniqueID))
                    return identity;
            throw new KeyNotFoundException();
        }
        public override IEnumerable<RoleAssignment> GetRoleAssignments(Identity identity) => roleAssignments.Where((RoleAssignment arg) => arg.Identity.Equals(identity));
        public override bool Save(Identity identity)
        {
            throw new NotImplementedException();
        }

        public void AddRoleAssignment(RoleAssignment roleAssignment) => roleAssignments.Add(roleAssignment);
    }

    [TestFixture()]
    public class IdentityTests
    {
        [Test()]
        public void TestCase()
        {
            TestIdentityProvider identityProvider = new TestIdentityProvider();

            Identity idService = identityProvider.CreateIdentity("Service");
            Identity idOrg = identityProvider.CreateIdentity("Organization");
            Identity idManager = identityProvider.CreateIdentity("Manager");
            Identity idEmpA = identityProvider.CreateIdentity("EmployeeA");
            Identity idEmpB = identityProvider.CreateIdentity("EmployeeB");
            Identity idEmpC = identityProvider.CreateIdentity("EmployeeC");
            Identity idEmpD = identityProvider.CreateIdentity("EmployeeD");

            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider,idOrg,idService,Role.OWN));
            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider, idManager, idOrg, Role.OWN));
            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider, idEmpA, idOrg, Role.IMPERSONATE | Role.CONTROL));
            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider, idEmpB, idEmpA, Role.IMPERSONATE | Role.ADMIN));
            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider, idEmpC, idOrg, Role.IMPERSONATE | Role.CONTROL));
            identityProvider.AddRoleAssignment(new RoleAssignment(identityProvider, idEmpD, idEmpC, Role.ADMIN));

            DumpRoleAssigments(idService);
            DumpRoleAssigments(idOrg);
            DumpRoleAssigments(idManager);
            DumpRoleAssigments(idEmpA);
            DumpRoleAssigments(idEmpB);
            DumpRoleAssigments(idEmpC);
            DumpRoleAssigments(idEmpD);
        }

        public void DumpRoleAssigments(Identity identity)
        {
            Console.WriteLine("Identity: {0}", identity.IdentityName);
            foreach (RoleAssignment roleAssignment in identity.RoleAssignments)
            {
                Console.WriteLine("  {0}", roleAssignment);
            }
            foreach (AssignedRole assignedRole in identity.AssignedRoles)
            {
                Console.WriteLine("  {0}", assignedRole);
            }
        }

    }
}