using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using FluentAssertions;
using foodmarket.IntegrationTests.Support;
using Xunit;

namespace foodmarket.IntegrationTests;

/// <summary>Быстрый вход кассира по PIN (grant_type=pin) на зарегистрированном
/// устройстве: PIN задаёт админ, касса входит по (точка + PIN); 5 неверных → блок.</summary>
[Collection(ApiCollection.Name)]
public class PinLoginTests
{
    private readonly ApiFactory _factory;
    public PinLoginTests(ApiFactory factory) => _factory = factory;

    private async Task<HttpResponseMessage> PinLoginAsync(HttpClient client, string pointId, string pin)
        => await client.PostAsync("/connect/token", new FormUrlEncodedContent(new Dictionary<string, string>
        {
            ["grant_type"] = "pin", ["client_id"] = "food-market-web",
            ["retail_point_id"] = pointId, ["pin"] = pin,
            ["scope"] = "openid profile email roles api offline_access",
        }));

    [Fact]
    public async Task Cashier_logs_in_by_pin_on_assigned_point()
    {
        var admin = new ApiActor(_factory.CreateClient());
        await admin.SignupAndLoginAsync($"pin-{Guid.NewGuid():N}");
        var refs = await admin.LoadRefsAsync();
        var point = await admin.CreateRetailPointAsync(refs.StoreId, $"Точка-{Guid.NewGuid():N}");

        var roleResp = await admin.Http.PostAsJsonAsync("/api/organization/employee-roles", new
        {
            name = $"Касса-{Guid.NewGuid():N}",
            permissions = new { retailSalesOperate = true, cashShiftOperate = true, productsView = true },
        });
        roleResp.EnsureSuccessStatusCode();
        var roleId = (await roleResp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();

        var email = $"pin-c-{Guid.NewGuid():N}@example.kz";
        var empResp = await admin.Http.PostAsJsonAsync("/api/organization/employees", new
        {
            lastName = "Кассиров", firstName = "Пётр", roleId, isActive = true, createAccount = true, email,
            retailPointIds = new[] { point },
        });
        empResp.EnsureSuccessStatusCode();
        var empId = (await empResp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("employee").GetProperty("id").GetString();

        // Админ задаёт PIN.
        var setPin = await admin.Http.PostAsJsonAsync($"/api/organization/employees/{empId}/pin", new { pin = "4321" });
        setPin.StatusCode.Should().Be(HttpStatusCode.OK);

        // Вход по PIN (точка + PIN) → токен.
        var anon = _factory.CreateClient();
        using var ok = await PinLoginAsync(anon, point, "4321");
        ok.StatusCode.Should().Be(HttpStatusCode.OK, await ok.Content.ReadAsStringAsync());
        var token = (await ok.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("access_token").GetString();
        token.Should().NotBeNullOrEmpty();

        // Токен рабочий: /api/me отдаёт точку кассира.
        anon.DefaultRequestHeaders.Authorization = new("Bearer", token);
        var me = await anon.GetFromJsonAsync<JsonElement>("/api/me");
        me.GetProperty("retailPointIds").EnumerateArray().Select(x => x.GetString()).Should().Contain(point);
    }

    [Fact]
    public async Task Wrong_pin_is_rejected_and_locks_after_five()
    {
        var admin = new ApiActor(_factory.CreateClient());
        await admin.SignupAndLoginAsync($"pinlock-{Guid.NewGuid():N}");
        var refs = await admin.LoadRefsAsync();
        var point = await admin.CreateRetailPointAsync(refs.StoreId, $"Точка-{Guid.NewGuid():N}");
        var roleResp = await admin.Http.PostAsJsonAsync("/api/organization/employee-roles", new
        { name = $"Касса-{Guid.NewGuid():N}", permissions = new { cashShiftOperate = true } });
        var roleId = (await roleResp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();
        var email = $"pinlock-c-{Guid.NewGuid():N}@example.kz";
        var empResp = await admin.Http.PostAsJsonAsync("/api/organization/employees", new
        { lastName = "К", firstName = "П", roleId, isActive = true, createAccount = true, email, retailPointIds = new[] { point } });
        var empId = (await empResp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("employee").GetProperty("id").GetString();
        (await admin.Http.PostAsJsonAsync($"/api/organization/employees/{empId}/pin", new { pin = "1111" })).EnsureSuccessStatusCode();

        var anon = _factory.CreateClient();
        // 5 неверных попыток.
        for (int i = 0; i < 5; i++)
        {
            using var bad = await PinLoginAsync(anon, point, "0000");
            bad.StatusCode.Should().Be(HttpStatusCode.BadRequest);
        }
        // Теперь точка заблокирована: даже верный PIN не проходит.
        using var locked = await PinLoginAsync(anon, point, "1111");
        locked.StatusCode.Should().Be(HttpStatusCode.BadRequest);
        (await locked.Content.ReadAsStringAsync()).Should().Contain("pin_locked");
    }

    [Fact]
    public async Task Duplicate_pin_on_same_point_is_rejected()
    {
        var admin = new ApiActor(_factory.CreateClient());
        await admin.SignupAndLoginAsync($"pindup-{Guid.NewGuid():N}");
        var refs = await admin.LoadRefsAsync();
        var point = await admin.CreateRetailPointAsync(refs.StoreId, $"Точка-{Guid.NewGuid():N}");
        var roleResp = await admin.Http.PostAsJsonAsync("/api/organization/employee-roles", new
        { name = $"Касса-{Guid.NewGuid():N}", permissions = new { cashShiftOperate = true } });
        var roleId = (await roleResp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();

        async Task<string> MakeEmp(string ln)
        {
            var r = await admin.Http.PostAsJsonAsync("/api/organization/employees", new
            { lastName = ln, firstName = "П", roleId, isActive = true, createAccount = true, email = $"dup-{Guid.NewGuid():N}@example.kz", retailPointIds = new[] { point } });
            r.EnsureSuccessStatusCode();
            return (await r.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("employee").GetProperty("id").GetString()!;
        }
        var e1 = await MakeEmp("Первый");
        var e2 = await MakeEmp("Второй");
        (await admin.Http.PostAsJsonAsync($"/api/organization/employees/{e1}/pin", new { pin = "2468" })).EnsureSuccessStatusCode();
        using var dup = await admin.Http.PostAsJsonAsync($"/api/organization/employees/{e2}/pin", new { pin = "2468" });
        dup.StatusCode.Should().Be(HttpStatusCode.Conflict);
    }
}