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using System.Collections.Generic;
using XenAdmin.Core;
using XenAdmin.Network;
using XenAPI;


namespace XenAdmin.Actions
{
    public class SetVMStartupOptionsAction : AsyncAction
    {
        private readonly Dictionary<VM, VMStartupOptions> settings = new Dictionary<VM, VMStartupOptions>();
        private readonly Pool pool;

        public SetVMStartupOptionsAction(IXenConnection connection, Dictionary<VM, VMStartupOptions> settings, bool suppressHistory)
            : base(connection, Messages.SETTING_VM_STARTUP_OPTIONS, suppressHistory)
        {
            System.Diagnostics.Trace.Assert(connection != null);
            System.Diagnostics.Trace.Assert(settings != null);

            this.settings = settings;
            pool = Helpers.GetPoolOfOne(Connection);
            if (pool == null)
                throw new Failure(Failure.INTERNAL_ERROR, string.Format(Messages.POOL_GONE, BrandManager.BrandConsole));

            ApiMethodsToRoleCheck.AddRange("VM.set_order", "VM.set_start_delay", "Pool.async_sync_database");
        }

        protected override void Run()
        {
            int i = 0;
            foreach (VM vm in settings.Keys)
            {
                Description = string.Format(Messages.SETTING_VM_STARTUP_OPTIONS_ON_X, Helpers.GetName(vm));

                VM.set_order(Session, vm.opaque_ref, settings[vm].Order);
                VM.set_start_delay(Session, vm.opaque_ref, settings[vm].StartDelay);

                PercentComplete = (int)(++i * (60.0 / settings.Count));
                if (Cancelling)
                    throw new CancelledException();
            }

            // Sync database to ensure new settings are saved to all hosts
            RelatedTask = Pool.async_sync_database(Session);
            PollToCompletion(60, 100);

            Description = Messages.COMPLETED;
        }
    }
}