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

namespace TeamUp.IntegrationTests;

/// <summary>
/// The org structure spine: divisions → products/services → teams. Owner-only writes, org-scoped
/// validation, and teams optionally attached to a product (nullable for pre-structure teams).
/// </summary>
public sealed class OrgStructureTests(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 DivisionResponse(Guid Id, Guid OrganizationId, string Name);

    private sealed record ProductResponse(Guid Id, Guid OrganizationId, Guid? DivisionId, string Name, string Kind);

    private sealed record TeamResponse(Guid Id, Guid OrganizationId, string Name, Guid? ProductId);

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

        var owner = await PostOk<BootstrapResponse>(anon, "/api/identity/bootstrap", new
        {
            organizationName = "AliaSaaS",
            ownerEmail = "owner@alia.test",
            ownerDisplayName = "Owner",
            ownerPassword = "Passw0rd!",
        });
        using var client = Authed(factory, owner.Token);
        await client.PostAsJsonAsync("/api/orgboard/organizations", new { organizationId = owner.OrganizationId, name = "AliaSaaS" });

        // Division → product under it; a service with no division; both listable.
        var technical = await PostOk<DivisionResponse>(client, "/api/orgboard/divisions",
            new { organizationId = owner.OrganizationId, name = "Technical" });

        var ipnops = await PostOk<ProductResponse>(client, "/api/orgboard/products",
            new { organizationId = owner.OrganizationId, name = "IPNOPS", kind = "Product", divisionId = technical.Id });
        Assert.Equal(technical.Id, ipnops.DivisionId);

        var payroll = await PostOk<ProductResponse>(client, "/api/orgboard/products",
            new { organizationId = owner.OrganizationId, name = "Payroll", kind = "Service" });
        Assert.Null(payroll.DivisionId);
        Assert.Equal("Service", payroll.Kind);

        var divisions = await client.GetFromJsonAsync<List<DivisionResponse>>(
            $"/api/orgboard/divisions?organizationId={owner.OrganizationId}");
        Assert.Contains(divisions!, d => d.Name == "Technical");

        var products = await client.GetFromJsonAsync<List<ProductResponse>>(
            $"/api/orgboard/products?organizationId={owner.OrganizationId}");
        Assert.Equal(2, products!.Count);

        // A team under the product; a team without one still works (backward compatible).
        var coreTeam = await PostOk<TeamResponse>(client, "/api/orgboard/teams",
            new { organizationId = owner.OrganizationId, name = "Core", productId = ipnops.Id });
        Assert.Equal(ipnops.Id, coreTeam.ProductId);

        var looseTeam = await PostOk<TeamResponse>(client, "/api/orgboard/teams",
            new { organizationId = owner.OrganizationId, name = "Loose" });
        Assert.Null(looseTeam.ProductId);

        var teams = await client.GetFromJsonAsync<List<TeamResponse>>(
            $"/api/orgboard/teams?organizationId={owner.OrganizationId}");
        Assert.Contains(teams!, t => t.Id == coreTeam.Id && t.ProductId == ipnops.Id);

        // Validation: a product can't attach to a foreign/unknown division; nor a team to an unknown product.
        var badProduct = await client.PostAsJsonAsync("/api/orgboard/products",
            new { organizationId = owner.OrganizationId, name = "X", kind = "Product", divisionId = Guid.NewGuid() });
        Assert.Equal(HttpStatusCode.BadRequest, badProduct.StatusCode);

        var badTeam = await client.PostAsJsonAsync("/api/orgboard/teams",
            new { organizationId = owner.OrganizationId, name = "X", productId = Guid.NewGuid() });
        Assert.Equal(HttpStatusCode.BadRequest, badTeam.StatusCode);

        // A plain Member cannot create structure (owner capability).
        var invite = await PostOk<InviteResponse>(client, "/api/identity/invitations", new
        {
            email = "dev@alia.test",
            scopeType = "Organization",
            scopeId = owner.OrganizationId,
            role = "Member",
            organizationId = owner.OrganizationId,
        });
        var member = await PostOk<AuthResponse>(anon, "/api/identity/invitations/accept",
            new { token = invite.Token, displayName = "Dev", password = "Passw0rd!" });
        using var memberClient = Authed(factory, member.Token);

        var forbidden = await memberClient.PostAsJsonAsync("/api/orgboard/divisions",
            new { organizationId = owner.OrganizationId, name = "Nope" });
        Assert.Equal(HttpStatusCode.Forbidden, forbidden.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<T> PostOk<T>(HttpClient client, string url, object body)
    {
        var response = await client.PostAsJsonAsync(url, body);
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var value = await response.Content.ReadFromJsonAsync<T>();
        Assert.NotNull(value);
        return value!;
    }
}