using System.Net;
using System.Net.Http.Json;
using IdentityShroud.Core;
using IdentityShroud.Core.Model;
using IdentityShroud.Core.Tests.Fixtures;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

namespace IdentityShroud.Api.Tests.Apis;

public class ClientApiTests : IClassFixture<ApplicationFactory>
{
    private readonly ApplicationFactory _factory;

    public ClientApiTests(ApplicationFactory factory)
    {
        _factory = factory;

        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<Db>();
        if (!db.Database.EnsureCreated())
        {
            db.Database.ExecuteSqlRaw("TRUNCATE realm CASCADE;");
        }
    }

    [Theory]
    [InlineData(null, false, "ClientId")]
    [InlineData("", false, "ClientId")]
    [InlineData("my-client", true, "")]
    public async Task Create_Validation(string? clientId, bool succeeds, string fieldName)
    {
        // setup
        Realm realm = await CreateRealmAsync("test-realm", "Test Realm");

        var client = _factory.CreateClient();

        // act
        var response = await client.PostAsync(
            $"/api/v1/realms/{realm.Id}/clients",
            JsonContent.Create(new { ClientId = clientId }),
            TestContext.Current.CancellationToken);

#if DEBUG
        string contents = await response.Content.ReadAsStringAsync(TestContext.Current.CancellationToken);
#endif

        if (succeeds)
        {
            Assert.Equal(HttpStatusCode.Created, response.StatusCode);
        }
        else
        {
            Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
            var problemDetails =
                await response.Content.ReadFromJsonAsync<ValidationProblemDetails>(
                    TestContext.Current.CancellationToken);

            Assert.Contains(problemDetails!.Errors, e => e.Key == fieldName);
        }
    }

    [Fact]
    public async Task Create_Success_ReturnsCreatedWithLocation()
    {
        // setup
        Realm realm = await CreateRealmAsync("create-realm", "Create Realm");

        var client = _factory.CreateClient();

        // act
        var response = await client.PostAsync(
            $"/api/v1/realms/{realm.Id}/clients",
            JsonContent.Create(new { ClientId = "new-client", Name = "New Client" }),
            TestContext.Current.CancellationToken);

#if DEBUG
        string contents = await response.Content.ReadAsStringAsync(TestContext.Current.CancellationToken);
#endif

        // verify
        Assert.Equal(HttpStatusCode.Created, response.StatusCode);

        var body = await response.Content.ReadFromJsonAsync<ClientCreateReponse>(
            TestContext.Current.CancellationToken);

        Assert.NotNull(body);
        Assert.Equal("new-client", body.ClientId);
        Assert.True(body.Id > 0);
    }

    [Fact]
    public async Task Create_UnknownRealm_ReturnsNotFound()
    {
        var client = _factory.CreateClient();

        var response = await client.PostAsync(
            $"/api/v1/realms/{Guid.NewGuid()}/clients",
            JsonContent.Create(new { ClientId = "some-client" }),
            TestContext.Current.CancellationToken);

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

    [Fact]
    public async Task Get_Success()
    {
        // setup
        Realm realm = await CreateRealmAsync("get-realm", "Get Realm");
        Client dbClient = await CreateClientAsync(realm, "get-client", "Get Client");

        var httpClient = _factory.CreateClient();

        // act
        var response = await httpClient.GetAsync(
            $"/api/v1/realms/{realm.Id}/clients/{dbClient.Id}",
            TestContext.Current.CancellationToken);

#if DEBUG
        string contents = await response.Content.ReadAsStringAsync(TestContext.Current.CancellationToken);
#endif

        // verify
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        var body = await response.Content.ReadFromJsonAsync<ClientRepresentation>(
            TestContext.Current.CancellationToken);

        Assert.NotNull(body);
        Assert.Equal(dbClient.Id, body.Id);
        Assert.Equal("get-client", body.ClientId);
        Assert.Equal("Get Client", body.Name);
        Assert.Equal(realm.Id, body.RealmId);
    }

    [Fact]
    public async Task Get_UnknownClient_ReturnsNotFound()
    {
        // setup
        Realm realm = await CreateRealmAsync("notfound-realm", "NotFound Realm");

        var httpClient = _factory.CreateClient();

        // act
        var response = await httpClient.GetAsync(
            $"/api/v1/realms/{realm.Id}/clients/99999",
            TestContext.Current.CancellationToken);

        // verify
        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    private async Task<Realm> CreateRealmAsync(string slug, string name)
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<Db>();
        var realm = new Realm { Slug = slug, Name = name };
        db.Realms.Add(realm);
        await db.SaveChangesAsync(TestContext.Current.CancellationToken);
        return realm;
    }

    private async Task<Client> CreateClientAsync(Realm realm, string clientId, string? name = null)
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<Db>();
        var client = new Client
        {
            RealmId = realm.Id,
            ClientId = clientId,
            Name = name,
            CreatedAt = DateTime.UtcNow,
        };
        db.Clients.Add(client);
        await db.SaveChangesAsync(TestContext.Current.CancellationToken);
        return client;
    }
}