using System.Linq;
using Prism.Regions;
using Prism.Commands;
using System.Windows.Input;
using MahApps.Metro.Controls;
using SHJX.Service.Common.Constants;
using SHJX.Service.Common.Interface;

namespace SHJX.Service.Common.Service
{
    public class FlyoutService : IFlyoutService
    {
        private readonly IRegionManager _regionManager;
        private readonly IApplicationCommands _applicationCommands;

        public ICommand ShowFlyoutCommand { get; private set; }

        public FlyoutService(IRegionManager regionManager, IApplicationCommands applicationCommands)
        {
            _regionManager = regionManager;
            _applicationCommands = applicationCommands;
            ShowFlyoutCommand = new DelegateCommand<string>(ShowFlyout);
            //注册子命令给全局复合命令
            _applicationCommands.ShowCommand.RegisterCommand(this.ShowFlyoutCommand);
        }

        public void ShowFlyout(string flyoutName)
        {
            IRegion region = _regionManager.Regions[RegionNames.FlyoutRegion];
            if (region is null)
            {
                return;
            }
            if (region.Views.FirstOrDefault(v => v is IFlyoutView view && view.FlyoutName.Equals(flyoutName)) is Flyout flyout)
            {
                flyout.IsOpen = !flyout.IsOpen;
            }
        }
    }
}