using Disco.Data.Repository;
using Disco.Models.Repository;
using Disco.Services.Authorization;
using Disco.Services.Devices.ManagedGroups;
using Disco.Services.Interop.ActiveDirectory;
using Disco.Services.Users;
using System;
using System.Linq;

namespace Disco.Services
{
    public static class DeviceBatchExtensions
    {
        public static bool CanDelete(this DeviceBatch db, DiscoDataContext database)
        {
            if (!UserService.CurrentAuthorization.Has(Claims.Config.DeviceBatch.Delete))
                return false;

            // Can't Delete if Contains Devices
            if (database.Devices.Any(d => d.DeviceBatchId == db.Id))
                return false;

            return true;
        }

        public static void Delete(this DeviceBatch db, DiscoDataContext database)
        {
            if (!db.CanDelete(database))
                throw new InvalidOperationException("The state of this Device Batch doesn't allow it to be deleted");

            // Remove Linked Group
            ActiveDirectory.Context.ManagedGroups.Remove(DeviceBatchDevicesManagedGroup.GetKey(db));
            ActiveDirectory.Context.ManagedGroups.Remove(DeviceBatchAssignedUsersManagedGroup.GetKey(db));

            // Delete Batch
            database.DeviceBatches.Remove(db);
        }

        public static bool CanDecommission(this DeviceBatch db, DiscoDataContext database)
        {
            if (!UserService.CurrentAuthorization.Has(Claims.Device.Actions.Import))
                return false;

            if (!database.Devices.Any(d => d.DeviceBatchId == db.Id && d.DecommissionedDate == null))
                return false;

            return true;
        }

    }
}