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

namespace TeamUp.IntegrationTests;

/// <summary>
/// The accountability surface: the member directory, the invitations list, work-item transitions,
/// and the per-assignee performance metrics (pending load, done, worked hours, cycle time).
/// </summary>
public sealed class PerformanceTests(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 TeamResponse(Guid Id, Guid OrganizationId, string Name);

    private sealed record TaskResponse(
        Guid Id, Guid TeamId, string Title, string? Description, string Type,
        string Status, string AssigneeKind, Guid? AssigneeId, Guid? ParentId);

    private sealed record MemberRow(Guid Id, string Email, string DisplayName, string? Role);

    private sealed record InvitationRow(
        Guid Id, string Email, string ScopeType, Guid ScopeId, string Role, string Status,
        string Token, DateTimeOffset CreatedAtUtc);

    private sealed record PerformanceRow(
        string AssigneeKind, Guid AssigneeId, string? Name,
        int Backlog, int InProgress, int InReview, int Done,
        double WorkedHours, double? AvgCycleHours);

    private sealed record PerformanceResponse(int UnassignedPending, List<PerformanceRow> Rows);

    [Fact]
    public async Task Members_invitations_and_performance_metrics_work()
    {
        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" });
        var team = await PostOk<TeamResponse>(client, "/api/orgboard/teams", new { organizationId = owner.OrganizationId, name = "IPNOPS" });

        // The member directory lists the owner with their org role.
        var members = await client.GetFromJsonAsync<List<MemberRow>>(
            $"/api/identity/members?organizationId={owner.OrganizationId}");
        var ownerRow = Assert.Single(members!);
        Assert.Equal("Owner", ownerRow.Role);

        // Invitations are listed (with the join token) for inviter-level callers…
        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 invitations = await client.GetFromJsonAsync<List<InvitationRow>>(
            $"/api/identity/invitations?organizationId={owner.OrganizationId}");
        Assert.Contains(invitations!, i => i.Id == invite.InvitationId && i.Status == "Pending" && i.Token.Length > 0);

        // …but a plain Member is 403'd from the invitations list and the performance view.
        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))
        {
            Assert.Equal(HttpStatusCode.Forbidden,
                (await memberClient.GetAsync($"/api/identity/invitations?organizationId={owner.OrganizationId}")).StatusCode);
            Assert.Equal(HttpStatusCode.Forbidden,
                (await memberClient.GetAsync($"/api/orgboard/performance?organizationId={owner.OrganizationId}")).StatusCode);
        }

        // Work a task through the board: assign → InProgress → Done (transitions recorded).
        var task = await PostOk<TaskResponse>(client, "/api/orgboard/tasks", new
        {
            teamId = team.Id,
            title = "Ship the login screen",
            type = "Story",
        });
        await PatchOk<TaskResponse>(client, $"/api/orgboard/tasks/{task.Id}/assign", new { memberId = owner.MemberId });
        await PatchOk<TaskResponse>(client, $"/api/orgboard/tasks/{task.Id}/move", new { status = "InProgress" });
        await PatchOk<TaskResponse>(client, $"/api/orgboard/tasks/{task.Id}/move", new { status = "Done" });

        // A second task stays unassigned and pending.
        await PostOk<TaskResponse>(client, "/api/orgboard/tasks", new
        {
            teamId = team.Id,
            title = "Unowned chore",
            type = "Story",
        });

        var performance = await client.GetFromJsonAsync<PerformanceResponse>(
            $"/api/orgboard/performance?organizationId={owner.OrganizationId}");
        Assert.Equal(1, performance!.UnassignedPending);

        var row = Assert.Single(performance.Rows, r => r.AssigneeKind == "Member" && r.AssigneeId == owner.MemberId);
        Assert.Equal(1, row.Done);
        Assert.Equal(0, row.Backlog + row.InProgress + row.InReview);
        Assert.True(row.WorkedHours >= 0);
        Assert.NotNull(row.AvgCycleHours); // InProgress → Done was recorded via transitions
        Assert.Null(row.Name);             // member names resolve client-side from the directory
    }

    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!;
    }

    private static async Task<T> PatchOk<T>(HttpClient client, string url, object body)
    {
        var response = await client.PatchAsJsonAsync(url, body);
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var value = await response.Content.ReadFromJsonAsync<T>();
        Assert.NotNull(value);
        return value!;
    }
}