/*
 * Copyright (c) 2023 Proton AG
 *
 * This file is part of ProtonVPN.
 *
 * ProtonVPN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ProtonVPN is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ProtonVPN.  If not, see <https://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Sockets;
using System.Threading.Tasks;
using FluentAssertions;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Newtonsoft.Json;
using NSubstitute;
using ProtonVPN.Update.Releases;
using ProtonVPN.Update.Storage;

namespace ProtonVPN.Update.Tests.Storage;

[TestClass]
public class SafeReleaseStorageTest
{
    private IReleaseStorage _origin;

    [TestInitialize]
    public void TestInitialize()
    {
        _origin = Substitute.For<IReleaseStorage>();
    }

    [TestMethod]
    public async Task Releases_ShouldCall_Origin_Releases()
    {
        SafeReleaseStorage storage = new SafeReleaseStorage(_origin);

        await storage.GetReleasesAsync();

        await _origin.Received(1).GetReleasesAsync();
    }

    [TestMethod]
    public void Releases_ShouldPassException_WhenOriginThrows()
    {
        _origin.When(x => x.GetReleasesAsync()).Throw<Exception>();
        SafeReleaseStorage storage = new SafeReleaseStorage(_origin);

        Func<Task> action = () => storage.GetReleasesAsync();

        action.Should().ThrowAsync<Exception>();
    }

    [TestMethod]
    public void Releases_ShouldThrow_AppUpdateException_WhenOriginThrows()
    {
        Exception[] exceptions =
        {
            new HttpRequestException(),
            new OperationCanceledException(),
            new SocketException(),
            new JsonException()
        };

        foreach (Exception exception in exceptions)
        {
            Releases_ShouldThrow_AppUpdateException_WhenOriginThrows(exception);
            Releases_ShouldThrow_AppUpdateException_WhenOriginThrowsAsync(exception);
        }
    }

    private void Releases_ShouldThrow_AppUpdateException_WhenOriginThrows(Exception ex)
    {
        TestInitialize();
        _origin.When(x => x.GetReleasesAsync()).Throw(ex);
        SafeReleaseStorage storage = new SafeReleaseStorage(_origin);

        Func<Task> action = () => storage.GetReleasesAsync();

        action.Should().ThrowAsync<AppUpdateException>();
    }

    private void Releases_ShouldThrow_AppUpdateException_WhenOriginThrowsAsync(Exception ex)
    {
        TestInitialize();
        _origin.GetReleasesAsync().Returns(Task.FromException<IEnumerable<Release>>(ex));
        SafeReleaseStorage storage = new SafeReleaseStorage(_origin);

        Func<Task> action = () => storage.GetReleasesAsync();

        action.Should().ThrowAsync<AppUpdateException>();
    }
}