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

namespace foodmarket.IntegrationTests;

[Collection(ApiCollection.Name)]
public class InventoryPostUnpostTests
{
    private readonly ApiFactory _factory;
    public InventoryPostUnpostTests(ApiFactory factory) => _factory = factory;

    private static string RandomBarcode()
        => string.Concat(Enumerable.Range(0, 13).Select(_ => Random.Shared.Next(0, 10)));

    [Fact]
    public async Task Create_loads_book_qty_post_applies_diff_to_stock()
    {
        var api = new ApiActor(_factory.CreateClient());
        await api.SignupAndLoginAsync($"inv-{Guid.NewGuid():N}");
        var refs = await api.LoadRefsAsync();
        var p1 = await api.CreateProductAsync(refs, $"P1-{Guid.NewGuid():N}", 100m, RandomBarcode());
        var p2 = await api.CreateProductAsync(refs, $"P2-{Guid.NewGuid():N}", 200m, RandomBarcode());

        // Подкладываем 10 шт p1 и 5 шт p2 через Enter.
        foreach (var (pid, qty, cost) in new[] { (p1, 10m, 50m), (p2, 5m, 100m) })
        {
            var enter = await api.Http.PostAsJsonAsync("/api/inventory/enters", new
            {
                date = DateTime.UtcNow, storeId = refs.StoreId, currencyId = refs.CurrencyId,
                notes = "seed", lines = new[] { new { productId = pid, quantity = qty, unitCost = cost } },
            });
            enter.EnsureSuccessStatusCode();
            var eid = (await enter.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();
            (await api.Http.PostAsJsonAsync($"/api/inventory/enters/{eid}/post", new { })).EnsureSuccessStatusCode();
        }

        // Создаём инвентаризацию без строк — контроллер подгрузит сам.
        var create = await api.Http.PostAsJsonAsync("/api/inventory/inventories", new
        {
            date = DateTime.UtcNow,
            storeId = refs.StoreId,
            notes = "ежемесячный пересчёт",
            lines = (object[])Array.Empty<object>(),
        });
        create.EnsureSuccessStatusCode();
        var inv = await create.Content.ReadFromJsonAsync<JsonElement>();
        var invId = inv.GetProperty("id").GetString();
        var lines = inv.GetProperty("lines").EnumerateArray().ToList();
        lines.Should().HaveCountGreaterOrEqualTo(2, "контроллер подгрузил bookQty для всех товаров склада");

        var lineP1 = lines.First(l => l.GetProperty("productId").GetString() == p1);
        lineP1.GetProperty("bookQty").GetDecimal().Should().Be(10m);
        lineP1.GetProperty("actualQty").GetDecimal().Should().Be(0m);

        // Вносим фактические: 12 шт p1 (излишек +2), 3 шт p2 (недостача -2).
        var put = await api.Http.PutAsJsonAsync($"/api/inventory/inventories/{invId}", new
        {
            date = DateTime.UtcNow,
            storeId = refs.StoreId,
            notes = "проведено",
            lines = new[]
            {
                new { productId = p1, actualQty = 12m },
                new { productId = p2, actualQty = 3m },
            },
        });
        put.EnsureSuccessStatusCode();

        // Post → стоки 12 / 3.
        using var post = await api.Http.PostAsJsonAsync($"/api/inventory/inventories/{invId}/post", new { });
        post.IsSuccessStatusCode.Should().BeTrue($"post вернул {(int)post.StatusCode}: {await post.Content.ReadAsStringAsync()}");
        (await api.StockOfAsync(refs.StoreId, p1)).Should().Be(12m);
        (await api.StockOfAsync(refs.StoreId, p2)).Should().Be(3m);

        // Unpost → откат к 10/5.
        using var unpost = await api.Http.PostAsJsonAsync($"/api/inventory/inventories/{invId}/unpost", new { });
        unpost.IsSuccessStatusCode.Should().BeTrue();
        (await api.StockOfAsync(refs.StoreId, p1)).Should().Be(10m);
        (await api.StockOfAsync(refs.StoreId, p2)).Should().Be(5m);
    }

    [Fact]
    public async Task Post_rejected_if_no_diffs()
    {
        var api = new ApiActor(_factory.CreateClient());
        await api.SignupAndLoginAsync($"inv-nodiff-{Guid.NewGuid():N}");
        var refs = await api.LoadRefsAsync();
        var p1 = await api.CreateProductAsync(refs, $"P-{Guid.NewGuid():N}", 100m, RandomBarcode());

        var enter = await api.Http.PostAsJsonAsync("/api/inventory/enters", new
        {
            date = DateTime.UtcNow, storeId = refs.StoreId, currencyId = refs.CurrencyId,
            notes = "seed", lines = new[] { new { productId = p1, quantity = 3m, unitCost = 50m } },
        });
        enter.EnsureSuccessStatusCode();
        var eid = (await enter.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();
        (await api.Http.PostAsJsonAsync($"/api/inventory/enters/{eid}/post", new { })).EnsureSuccessStatusCode();

        var create = await api.Http.PostAsJsonAsync("/api/inventory/inventories", new
        {
            date = DateTime.UtcNow, storeId = refs.StoreId, notes = "match", lines = (object[])Array.Empty<object>(),
        });
        create.EnsureSuccessStatusCode();
        var inv = await create.Content.ReadFromJsonAsync<JsonElement>();
        var invId = inv.GetProperty("id").GetString();

        // Фактическое = учётному (3 == 3, diff = 0).
        await api.Http.PutAsJsonAsync($"/api/inventory/inventories/{invId}", new
        {
            date = DateTime.UtcNow, storeId = refs.StoreId, notes = "no-diff",
            lines = new[] { new { productId = p1, actualQty = 3m } },
        });

        using var post = await api.Http.PostAsJsonAsync($"/api/inventory/inventories/{invId}/post", new { });
        ((int)post.StatusCode).Should().Be(400);
    }

    [Fact]
    public async Task Tenant_isolation_inventory()
    {
        var a = new ApiActor(_factory.CreateClient());
        var b = new ApiActor(_factory.CreateClient());
        await a.SignupAndLoginAsync($"inv-iso-a-{Guid.NewGuid():N}");
        await b.SignupAndLoginAsync($"inv-iso-b-{Guid.NewGuid():N}");
        var refsA = await a.LoadRefsAsync();

        var resp = await a.Http.PostAsJsonAsync("/api/inventory/inventories", new
        {
            date = DateTime.UtcNow, storeId = refsA.StoreId, notes = "iso", lines = (object[])Array.Empty<object>(),
        });
        resp.EnsureSuccessStatusCode();
        var invId = (await resp.Content.ReadFromJsonAsync<JsonElement>()).GetProperty("id").GetString();

        var bList = await b.ListAsync("/api/inventory/inventories?pageSize=200");
        bList.Should().NotContain(x => x.GetProperty("id").GetString() == invId);

        using var direct = await b.Http.GetAsync($"/api/inventory/inventories/{invId}");
        direct.StatusCode.Should().Be(System.Net.HttpStatusCode.NotFound);
    }
}