using System;

using ChineseChess.GUI.Contracts.Services;
using ChineseChess.GUI.Models;
using ChineseChess.GUI.ViewModels;

using Microsoft.Extensions.Options;

using Moq;

using Xunit;

namespace ChineseChess.GUI.Tests.XUnit
{
    public class SettingsViewModelTests
    {
        public SettingsViewModelTests()
        {
        }

        [Fact]
        public void TestSettingsViewModel_SetCurrentTheme()
        {
            var mockThemeSelectorService = new Mock<IThemeSelectorService>();
            mockThemeSelectorService.Setup(mock => mock.GetCurrentTheme()).Returns(AppTheme.Light);
            var mockAppConfig = new Mock<IOptions<AppConfig>>();
            var mockSystemService = new Mock<ISystemService>();
            var mockApplicationInfoService = new Mock<IApplicationInfoService>();

            var settingsVm = new SettingsViewModel(mockAppConfig.Object, mockThemeSelectorService.Object, mockSystemService.Object, mockApplicationInfoService.Object);
            settingsVm.OnNavigatedTo(null);

            Assert.Equal(AppTheme.Light, settingsVm.Theme);
        }

        [Fact]
        public void TestSettingsViewModel_SetCurrentVersion()
        {
            var mockThemeSelectorService = new Mock<IThemeSelectorService>();
            var mockAppConfig = new Mock<IOptions<AppConfig>>();
            var mockSystemService = new Mock<ISystemService>();
            var mockApplicationInfoService = new Mock<IApplicationInfoService>();
            var testVersion = new Version(1, 2, 3, 4);
            mockApplicationInfoService.Setup(mock => mock.GetVersion()).Returns(testVersion);

            var settingsVm = new SettingsViewModel(mockAppConfig.Object, mockThemeSelectorService.Object, mockSystemService.Object, mockApplicationInfoService.Object);
            settingsVm.OnNavigatedTo(null);

            Assert.Equal($"ChineseChess.GUI - {testVersion}", settingsVm.VersionDescription);
        }

        [Fact]
        public void TestSettingsViewModel_SetThemeCommand()
        {
            var mockThemeSelectorService = new Mock<IThemeSelectorService>();
            var mockAppConfig = new Mock<IOptions<AppConfig>>();
            var mockSystemService = new Mock<ISystemService>();
            var mockApplicationInfoService = new Mock<IApplicationInfoService>();

            var settingsVm = new SettingsViewModel(mockAppConfig.Object, mockThemeSelectorService.Object, mockSystemService.Object, mockApplicationInfoService.Object);
            settingsVm.SetThemeCommand.Execute(AppTheme.Light.ToString());

            mockThemeSelectorService.Verify(mock => mock.SetTheme(AppTheme.Light));
        }
    }
}