using System.Net.Http.Json;
using System.Text.Json;
using System.Text.Json.Nodes;

namespace HSchool.AppHost.Tests;

[Collection(AppHostCollection.Name)]
public class InventoryApiTests(AppHostFixture fixture)
{
    private static readonly DateTime Start = new(2012, 4, 3, 6, 0, 0, DateTimeKind.Utc);

    [Fact]
    public async Task Card_IncludesWornAndCarried_ListDoesNot()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Гардероб карточка", Start, seed: 31);

        var page = await client.GetFromJsonAsync<PeoplePage>(
            $"/api/schools/{school.Id}/people?role=student&year=5&pageSize=20",
            TestContext.Current.CancellationToken);
        Assert.NotNull(page);
        var girl = page.People.First(person => person.Female);

        using var listResponse = await client.GetAsync(
            $"/api/schools/{school.Id}/people?pageSize=1",
            TestContext.Current.CancellationToken);
        var listJson = await listResponse.Content.ReadAsStringAsync(TestContext.Current.CancellationToken);
        Assert.DoesNotContain("carryMass", listJson, StringComparison.Ordinal);
        Assert.DoesNotContain("\"worn\"", listJson, StringComparison.Ordinal);
        Assert.DoesNotContain("\"carried\"", listJson, StringComparison.Ordinal);

        var card = await client.GetFromJsonAsync<Card>(
            $"/api/schools/{school.Id}/people/{Uri.EscapeDataString(girl.Id)}?lang=ru",
            TestContext.Current.CancellationToken);
        Assert.NotNull(card);
        Assert.NotEmpty(card.Worn);
        Assert.Contains(card.Worn, item => item.Layers.Count > 0 && item.ColorLabel is { Length: > 0 });
        Assert.True(card.CarryCapacity > 0);
        Assert.True(card.CarryMass <= card.CarryCapacity);
        Assert.Contains(card.Carried, item => item.Mass > 0);
    }

    [Fact]
    public async Task SameSeed_YieldsTheSameShirt()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var first = await SchoolApiTests.CreateAsync(client, "Синяя рубашка 1", Start, seed: 31);
        var shirt = await FirstGirlTopAsync(client, first.Id);

        await SchoolApiTests.ResetAsync(client);
        var second = await SchoolApiTests.CreateAsync(client, "Синяя рубашка 2", Start, seed: 31);
        var again = await FirstGirlTopAsync(client, second.Id);

        Assert.Equal(shirt.DefName, again.DefName);
        Assert.Equal(shirt.Color, again.Color);
    }

    [Fact]
    public async Task PeopleJsonWithoutInventory_IsDressedOnReloadAndRewritten()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Старый сейв без одежды", Start, seed: 31);
        var before = await FirstGirlTopAsync(client, school.Id);

        var directory = await SavesDirectoryAsync(client);
        var path = Path.Combine(directory, $"{school.Id}.people.json");
        StripItems(path);
        Assert.DoesNotContain("\"items\"", File.ReadAllText(path), StringComparison.Ordinal);

        using var reload = await client.PostAsync("/api/dev/reload-schools", content: null, TestContext.Current.CancellationToken);
        reload.EnsureSuccessStatusCode();

        var after = await FirstGirlTopAsync(client, school.Id);
        Assert.Equal(before.DefName, after.DefName);
        Assert.Equal(before.Color, after.Color);
        Assert.Contains("\"items\"", File.ReadAllText(path), StringComparison.Ordinal);
    }

    private static async Task<WornItem> FirstGirlTopAsync(HttpClient client, int schoolId)
    {
        var page = await client.GetFromJsonAsync<PeoplePage>(
            $"/api/schools/{schoolId}/people?role=student&sex=female&pageSize=20",
            TestContext.Current.CancellationToken);
        Assert.NotNull(page);
        Assert.NotEmpty(page.People);
        var girl = page.People[0];
        var card = await client.GetFromJsonAsync<Card>(
            $"/api/schools/{schoolId}/people/{Uri.EscapeDataString(girl.Id)}?lang=ru",
            TestContext.Current.CancellationToken);
        Assert.NotNull(card);
        var top = card.Worn.FirstOrDefault(item =>
            item.Layers.Any(layer => layer.DefName.Equals("Top", StringComparison.Ordinal)));
        Assert.NotNull(top);
        return top;
    }

    private static async Task<string> SavesDirectoryAsync(HttpClient client)
    {
        var payload = await client.GetFromJsonAsync<SavesDirectoryResponse>(
            "/api/dev/saves-directory",
            TestContext.Current.CancellationToken);
        Assert.NotNull(payload);
        return payload.Path;
    }

    private static void StripItems(string path)
    {
        var root = JsonNode.Parse(File.ReadAllText(path))
            ?? throw new InvalidOperationException("People file parsed to nothing.");
        foreach (var person in root["people"]?.AsArray() ?? [])
        {
            person?.AsObject().Remove("items");
        }

        var applicants = root["applicants"]?["applicants"]?.AsArray();
        if (applicants is not null)
        {
            foreach (var applicant in applicants)
            {
                applicant?["person"]?.AsObject()?.Remove("items");
            }
        }

        File.WriteAllText(
            path,
            root.ToJsonString(new JsonSerializerOptions { WriteIndented = true }));
    }

    private sealed record SavesDirectoryResponse(string Path);

    private sealed record PeoplePage(IReadOnlyList<PersonRow> People);

    private sealed record PersonRow(string Id, string FullName, bool Female);

    private sealed record Card(
        IReadOnlyList<WornItem> Worn,
        IReadOnlyList<CarriedItem> Carried,
        float CarryMass,
        float CarryCapacity);

    private sealed record WornItem(
        string DefName,
        string Label,
        string? Color,
        string? ColorLabel,
        IReadOnlyList<Layer> Layers);

    private sealed record Layer(string DefName, string Label);

    private sealed record CarriedItem(string DefName, string Label, float Mass);
}