using System.Net.Http.Json;
using System.Text.Json;
using System.Text.RegularExpressions;

namespace HSchool.AppHost.Tests;

[Collection(AppHostCollection.Name)]
public class ChangelogApiTests(AppHostFixture fixture)
{
    private static readonly Regex Sha = new("^[0-9a-f]{40}$", RegexOptions.CultureInvariant);

    [Fact]
    public async Task Changelog_WithoutSession_ReturnsUnauthorized()
    {
        var http = fixture.App.GetEndpoint("server", "http").ToString();
        using var client = new HttpClient { BaseAddress = new Uri(http) };

        using var response = await client.GetAsync("/api/changelog", TestContext.Current.CancellationToken);

        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
    }

    [Fact]
    public async Task Changelog_WithoutSince_ReturnsCurrentAndEmptyCommits()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.LoginAsync(client);

        var body = await client.GetFromJsonAsync<ChangelogDto>(
            "/api/changelog",
            JsonOptions,
            TestContext.Current.CancellationToken);

        Assert.NotNull(body);
        Assert.Matches(Sha, body.Current);
        Assert.Empty(body.Commits);
    }

    [Fact]
    public async Task Changelog_SinceCurrent_ReturnsEmptyCommits()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.LoginAsync(client);

        var first = await client.GetFromJsonAsync<ChangelogDto>(
            "/api/changelog",
            JsonOptions,
            TestContext.Current.CancellationToken);
        Assert.NotNull(first);

        var again = await client.GetFromJsonAsync<ChangelogDto>(
            $"/api/changelog?since={first.Current}",
            JsonOptions,
            TestContext.Current.CancellationToken);

        Assert.NotNull(again);
        Assert.Equal(first.Current, again.Current);
        Assert.Empty(again.Commits);
    }

    private static JsonSerializerOptions JsonOptions { get; } = new()
    {
        PropertyNameCaseInsensitive = true,
    };

    private sealed record ChangelogDto(string Current, ChangelogCommitDto[] Commits);

    private sealed record ChangelogCommitDto(string Sha, DateTimeOffset Date, string Subject);
}