using System.Text.Json;
using Fleet.Core;
using Fleet.Hosting;
using MoShiro.Protocol;

namespace MoShiro.Probe.Tests;

public sealed class OpenWrtUpdaterTests : IDisposable
{
    private readonly string _directory = Path.Combine(Path.GetTempPath(), "moshiro-native-" + Guid.NewGuid().ToString("N"));

    [Fact]
    public void Offer_AndApply_WriteFixedFlags_NotRemoteManifestOrCommands()
    {
        var updater = new OpenWrtUpdater(_directory, Path.Combine(_directory, "status.json"), TimeProvider.System, NullNodeLog.Instance);
        updater.Offer();
        updater.RequestApply();
        Assert.Equal("check", File.ReadAllText(Path.Combine(_directory, "check.request")));
        Assert.Equal("check", File.ReadAllText(Path.Combine(_directory, "apply.request")));
        Assert.Equal(2, Directory.GetFiles(_directory).Length);
    }

    [Fact]
    public void Status_WritesHealthAndReadsHostStatus()
    {
        var store = new ConfigStore(_directory);
        store.Write("status.json", "{\"state\":\"rolled_back\",\"at\":123}"u8.ToArray());
        var updater = new OpenWrtUpdater(_directory, Path.Combine(_directory, "status.json"), TimeProvider.System, NullNodeLog.Instance);
        Assert.Equal("rolled_back", updater.Status()?.State);
        using JsonDocument health = JsonDocument.Parse(File.ReadAllBytes(Path.Combine(_directory, "health.json")));
        Assert.Equal(BuildInfo.Version, health.RootElement.GetProperty("version").GetString());
        Assert.Equal(Environment.ProcessId, health.RootElement.GetProperty("pid").GetInt32());
        Assert.True(health.RootElement.GetProperty("at").GetInt64() > 0);
    }

    [Fact]
    public void Status_MissingOrCorruptHostStatus_DoesNotStopCollector()
    {
        var updater = new OpenWrtUpdater(_directory, Path.Combine(_directory, "status.json"), TimeProvider.System, NullNodeLog.Instance);
        Assert.Null(updater.Status());
        new ConfigStore(_directory).Write("status.json", "not json"u8.ToArray());
        Assert.Null(updater.Status());
    }

    public void Dispose()
    {
        if (Directory.Exists(_directory))
        {
            Directory.Delete(_directory, recursive: true);
        }
    }
}