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using System.Collections.Generic;
using XenAdmin.Controls;
using XenAPI;

namespace XenAdmin.Wizards.CrossPoolMigrateWizard
{
    public partial class CrossPoolMigrateTransferNetworkPage : XenTabPage
    {
        private List<VM> selectedVMs;
        private readonly WizardMode wizardMode;

        public CrossPoolMigrateTransferNetworkPage(List<VM> selectedVMs, bool templatesOnly, WizardMode wizardMode)
        {
            this.selectedVMs = selectedVMs;
            this.wizardMode = wizardMode;

            InitializeComponent();

            blurbText.Text = templatesOnly ? Messages.CPS_WIZARD_MIGRATION_PAGE_TITLE_TEMPLATE : Messages.CPS_WIZARD_MIGRATION_PAGE_TITLE_VM;

            networkComboBox.ShowPoolName = true;
            networkComboBox.ExcludeDisconnectedNetworks = true;
            networkComboBox.ExcludeNetworksWithoutIpAddresses = true;
        }

        private bool m_buttonNextEnabled;
        private bool m_buttonPreviousEnabled;

        #region Base class (XenTabPage) overrides

        /// <summary>
        /// Gets the page's title (headline)
        /// </summary>
        public override string PageTitle => Messages.CPM_WIZARD_SELECT_TRANSFER_NETWORK_TITLE;

        /// <summary>
        /// Gets the page's label in the (left hand side) wizard progress panel
        /// </summary>
        public override string Text => Messages.CPM_WIZARD_SELECT_TRANSFER_NETWORK_PAGE_TEXT;

        /// <summary>
        /// Gets the value by which the help files section for this page is identified
        /// </summary>
        public override string HelpID => wizardMode == WizardMode.Copy ? "TransferNetworkCopyMode" : "TransferNetwork";

        protected override bool ImplementsIsDirty()
        {
            return false;
        }

        protected override void PageLoadedCore(PageLoadedDirection direction)
        {
            SetButtonsEnabled(true);
        }

        public override void PopulatePage()
        {
            networkComboBox.PopulateComboBox(Connection, item => !item.IsManagement);

            if (networkComboBox.SelectedItem == null)
                networkComboBox.SelectItem(item => item.IsManagement);
        }

        public KeyValuePair<string, string> NetworkUuid => networkComboBox.SelectedNetworkUuid;

        public override bool EnableNext()
        {
            return m_buttonNextEnabled;
        }

        public override bool EnablePrevious()
        {
            return m_buttonPreviousEnabled;
        }

        protected override void PageLeaveCore(PageLoadedDirection direction, ref bool cancel)
        {
            if (!CrossPoolMigrateWizard.AllVMsAvailable(selectedVMs))
            {
                cancel = true;
                SetButtonsEnabled(false);
            }
        }
        #endregion

        private void SetButtonsEnabled(bool enabled)
        {
            m_buttonNextEnabled = enabled;
            m_buttonPreviousEnabled = enabled;
            OnPageUpdated();
        }
    }
}