using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using Xunit;

namespace TeamUp.IntegrationTests;

/// <summary>
/// M1 Identity/access acceptance at the API level: bootstrap the first owner, log in, read /me,
/// invite a member, accept the invite, and confirm a Member cannot perform an owner-only action.
/// </summary>
public sealed class IdentityFlowTests(PostgresFixture postgres) : IClassFixture<PostgresFixture>
{
    private sealed record BootstrapResponse(string Token, Guid MemberId, Guid OrganizationId);

    private sealed record AuthResponse(string Token, Guid MemberId);

    private sealed record InviteResponse(Guid InvitationId, string Token);

    private sealed record MembershipDto(string ScopeType, Guid ScopeId, string Role);

    private sealed record MeResponse(Guid MemberId, string Email, string DisplayName, List<MembershipDto> Memberships);

    [Fact]
    public async Task Bootstrap_login_invite_accept_and_rbac_enforcement()
    {
        await using var factory = new TeamUpWebFactory(postgres.ConnectionString);
        using var client = factory.CreateClient();

        // First owner is created by bootstrap.
        var bootstrap = await client.PostAsJsonAsync("/api/identity/bootstrap", new
        {
            organizationName = "AliaSaaS",
            ownerEmail = "owner@alia.test",
            ownerDisplayName = "Owner",
            ownerPassword = "Passw0rd!",
        });
        Assert.Equal(HttpStatusCode.OK, bootstrap.StatusCode);
        var owner = await bootstrap.Content.ReadFromJsonAsync<BootstrapResponse>();
        Assert.NotNull(owner);

        // Bootstrapping again is rejected.
        var second = await client.PostAsJsonAsync("/api/identity/bootstrap", new
        {
            organizationName = "x",
            ownerEmail = "x@x.test",
            ownerDisplayName = "X",
            ownerPassword = "Passw0rd!",
        });
        Assert.Equal(HttpStatusCode.Conflict, second.StatusCode);

        // /me requires auth.
        Assert.Equal(HttpStatusCode.Unauthorized, (await client.GetAsync("/api/identity/me")).StatusCode);

        // Owner reads /me and holds an Owner membership.
        var me = await GetMe(factory, owner!.Token);
        Assert.Equal("owner@alia.test", me.Email);
        Assert.Contains(me.Memberships, m => m.Role == "Owner" && m.ScopeId == owner.OrganizationId);

        // Owner invites a Member at the org scope.
        var invite = await Authed(factory, owner.Token).PostAsJsonAsync("/api/identity/invitations", new
        {
            email = "dev@alia.test",
            scopeType = "Organization",
            scopeId = owner.OrganizationId,
            role = "Member",
            organizationId = owner.OrganizationId,
        });
        Assert.Equal(HttpStatusCode.OK, invite.StatusCode);
        var inviteResponse = await invite.Content.ReadFromJsonAsync<InviteResponse>();
        Assert.NotNull(inviteResponse);

        // The invitee accepts and gets a token.
        var accept = await client.PostAsJsonAsync("/api/identity/invitations/accept", new
        {
            token = inviteResponse!.Token,
            displayName = "Dev",
            password = "Passw0rd!",
        });
        Assert.Equal(HttpStatusCode.OK, accept.StatusCode);
        var member = await accept.Content.ReadFromJsonAsync<AuthResponse>();
        Assert.NotNull(member);

        // The new member can log in with their credentials.
        var login = await client.PostAsJsonAsync("/api/identity/auth/login", new
        {
            email = "dev@alia.test",
            password = "Passw0rd!",
        });
        Assert.Equal(HttpStatusCode.OK, login.StatusCode);

        // A Member cannot invite (owner-only capability) → 403.
        var memberInvite = await Authed(factory, member!.Token).PostAsJsonAsync("/api/identity/invitations", new
        {
            email = "nope@alia.test",
            scopeType = "Organization",
            scopeId = owner.OrganizationId,
            role = "Member",
            organizationId = owner.OrganizationId,
        });
        Assert.Equal(HttpStatusCode.Forbidden, memberInvite.StatusCode);

        // Bad credentials are rejected.
        var badLogin = await client.PostAsJsonAsync("/api/identity/auth/login", new
        {
            email = "owner@alia.test",
            password = "wrong",
        });
        Assert.Equal(HttpStatusCode.Unauthorized, badLogin.StatusCode);
    }

    private static HttpClient Authed(TeamUpWebFactory factory, string token)
    {
        var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
        return client;
    }

    private static async Task<MeResponse> GetMe(TeamUpWebFactory factory, string token)
    {
        using var client = Authed(factory, token);
        var me = await client.GetFromJsonAsync<MeResponse>("/api/identity/me");
        Assert.NotNull(me);
        return me!;
    }
}