using System.Net;
using System.Text;
using Restaurant.Admin.Bff.Application.Adapters;
using Restaurant.Admin.Bff.Contracts.Requests;

namespace Restaurant.Admin.Bff.Application.UnitTests;

public sealed class OperationsRestaurantAdminServiceClientTests
{
    [Fact]
    public async Task FetchConfigAsync_MapsFlagsWindowsAndChanges()
    {
        var adapter = new OperationsRestaurantAdminServiceClient(CreateClient(ConfigPayload));

        var response = await adapter.FetchConfigAsync(new GetRestaurantAdminConfigRequest("demo-context"), CancellationToken.None);

        Assert.Equal("v2", response.Version);
        Assert.NotEmpty(response.FeatureFlags);
        Assert.NotEmpty(response.ServiceWindows);
        Assert.NotEmpty(response.RecentChanges);
    }

    [Fact]
    public async Task FetchRecentChangesAsync_ProjectsChangeHistory()
    {
        var adapter = new OperationsRestaurantAdminServiceClient(CreateClient(ConfigPayload));

        var response = await adapter.FetchRecentChangesAsync(new GetRestaurantAdminConfigRequest("demo-context"), CancellationToken.None);

        Assert.Equal(2, response.RecentChanges.Count);
    }

    [Fact]
    public async Task SetServiceWindowAsync_MapsUpdatedServiceWindow()
    {
        var adapter = new OperationsRestaurantAdminServiceClient(CreateClient("""
            {
              "contextId": "demo-context",
              "applied": true,
              "message": "Service window updated by admin-operator.",
              "serviceWindow": {
                "dayOfWeek": 1,
                "openAt": "08:00:00",
                "closeAt": "22:00:00",
                "isClosed": false
              }
            }
            """));

        var response = await adapter.SetServiceWindowAsync(
            new SetServiceWindowRequest("demo-context", DayOfWeek.Monday, new TimeOnly(8, 0), new TimeOnly(22, 0), "admin-operator"),
            CancellationToken.None);

        Assert.True(response.Applied);
        Assert.Equal(DayOfWeek.Monday, response.ServiceWindow.Day);
    }

    private static HttpClient CreateClient(string json)
    {
        return new HttpClient(new StubHttpMessageHandler(json))
        {
            BaseAddress = new Uri("http://operations-service:8080/")
        };
    }

    private sealed class StubHttpMessageHandler(string json) : HttpMessageHandler
    {
        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            return Task.FromResult(new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(json, Encoding.UTF8, "application/json")
            });
        }
    }

    private const string ConfigPayload = """
        {
          "contextId": "demo-context",
          "summary": "Restaurant admin snapshot includes current flags, service windows, and recent control-plane changes.",
          "version": "v2",
          "featureFlags": [
            { "key": "kitchen.dispatch.enabled", "enabled": true },
            { "key": "pos.closeout.preview", "enabled": true }
          ],
          "serviceWindows": [
            { "dayOfWeek": 1, "openAt": "08:00:00", "closeAt": "22:00:00", "isClosed": false },
            { "dayOfWeek": 5, "openAt": "08:00:00", "closeAt": "23:30:00", "isClosed": false }
          ],
          "recentChanges": [
            {
              "changeId": "CFG-100",
              "category": "service-window",
              "description": "Extended Friday dinner service window.",
              "updatedBy": "admin-operator",
              "updatedAtUtc": "2026-03-31T10:00:00Z"
            },
            {
              "changeId": "CFG-101",
              "category": "feature-flag",
              "description": "Enabled POS closeout preview mode.",
              "updatedBy": "ops-lead",
              "updatedAtUtc": "2026-03-31T12:00:00Z"
            }
          ]
        }
        """;
}