using System.Net.Http.Json;

namespace HSchool.AppHost.Tests;

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

    [Fact]
    public async Task List_FiltersByRoleAndYear()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Люди фильтр", Start);

        var page = await GetPeopleAsync(client, school.Id, "role=student&year=5&pageSize=100");

        Assert.NotEmpty(page.People);
        Assert.Equal(page.People.Count, page.Total);
        Assert.All(page.People, person =>
        {
            Assert.Contains("student", person.Roles);
            Assert.Equal(5, person.ClassYear);
        });
        Assert.Contains(5, page.Filters.Years);
    }

    [Fact]
    public async Task List_SortsBySurname()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Люди сорт", Start);

        var page = await GetPeopleAsync(client, school.Id, "sort=surname&pageSize=20");
        var surnames = page.People.Select(person => person.Surname).ToArray();
        Assert.Equal(surnames.OrderBy(name => name, StringComparer.Ordinal), surnames);
    }

    [Fact]
    public async Task List_PageBounds()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Люди страницы", Start);

        var first = await GetPeopleAsync(client, school.Id, "page=1&pageSize=10");
        Assert.True(first.Total > 10);
        Assert.Equal(10, first.People.Count);
        Assert.Equal(1, first.Page);
        Assert.Equal(10, first.PageSize);

        var past = await GetPeopleAsync(client, school.Id, "page=999&pageSize=10");
        Assert.Equal(first.Total, past.Total);
        Assert.Empty(past.People);

        using var zero = await client.GetAsync($"/api/schools/{school.Id}/people?page=0", TestContext.Current.CancellationToken);
        Assert.Equal(HttpStatusCode.BadRequest, zero.StatusCode);
        Assert.Equal("invalid-query", await ProblemCodeAsync(zero));

        using var huge = await client.GetAsync($"/api/schools/{school.Id}/people?pageSize=101", TestContext.Current.CancellationToken);
        Assert.Equal(HttpStatusCode.BadRequest, huge.StatusCode);
        Assert.Equal("invalid-query", await ProblemCodeAsync(huge));
    }

    [Fact]
    public async Task List_UnknownSchool_IsNotFound()
    {
        using var client = fixture.App.CreateHttpClient("server");

        using var response = await client.GetAsync("/api/schools/999999/people", TestContext.Current.CancellationToken);
        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
        Assert.Equal("unknown-school", await ProblemCodeAsync(response));
    }

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

        using var response = await client.GetAsync(
            $"/api/schools/{school.Id}/people/nobody",
            TestContext.Current.CancellationToken);
        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
        Assert.Equal("unknown-person", await ProblemCodeAsync(response));
    }

    [Fact]
    public async Task Card_IncludesFamilyAndLiveNeeds()
    {
        using var client = fixture.App.CreateHttpClient("server");
        await SchoolApiTests.ResetAsync(client);
        var school = await SchoolApiTests.CreateAsync(client, "Люди семья", Start);

        var page = await GetPeopleAsync(client, school.Id, "role=student&year=5&pageSize=10");
        var pupil = page.People[0];

        var card = await client.GetFromJsonAsync<PersonCardResponse>(
            $"/api/schools/{school.Id}/people/{Uri.EscapeDataString(pupil.Id)}?lang=ru",
            TestContext.Current.CancellationToken);
        Assert.NotNull(card);
        Assert.Equal(pupil.Id, card.Id);
        Assert.Equal(2, card.Family.Parents.Count);
        Assert.Contains(card.Needs, need => need.Id == "Sleep" && need.Value == 1f);
        Assert.NotEmpty(card.Body);
        Assert.NotEmpty(card.Skills);

        var mother = card.Family.Parents.Single(parent => parent.Female);
        var motherCard = await client.GetFromJsonAsync<PersonCardResponse>(
            $"/api/schools/{school.Id}/people/{Uri.EscapeDataString(mother.Id)}?lang=ru",
            TestContext.Current.CancellationToken);
        Assert.NotNull(motherCard);
        Assert.Contains(motherCard.Family.Children, child => child.Id == pupil.Id);
    }

    private static async Task<PeopleListResponse> GetPeopleAsync(HttpClient client, int schoolId, string query)
    {
        var page = await client.GetFromJsonAsync<PeopleListResponse>(
            $"/api/schools/{schoolId}/people?{query}",
            TestContext.Current.CancellationToken);
        Assert.NotNull(page);
        return page;
    }

    private static async Task<string?> ProblemCodeAsync(HttpResponseMessage response)
    {
        var problem = await response.Content.ReadFromJsonAsync<ProblemResponse>(TestContext.Current.CancellationToken);
        return problem?.Code;
    }

    private sealed record ProblemResponse(string? Code);

    private sealed record PeopleListResponse(
        int Total,
        int Page,
        int PageSize,
        IReadOnlyList<PersonListItemResponse> People,
        PeopleFilterOptionsResponse Filters);

    private sealed record PeopleFilterOptionsResponse(
        IReadOnlyList<int> Years,
        IReadOnlyList<string> Letters,
        IReadOnlyList<DefLabelResponse> Positions);

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

    private sealed record PersonListItemResponse(
        string Id,
        string FullName,
        string Surname,
        string Given,
        string Patronymic,
        bool Female,
        int Age,
        IReadOnlyList<string> Roles,
        int? ClassYear,
        string? ClassLetter,
        string? Position,
        string? PositionLabel);

    private sealed record PersonCardResponse(
        string Id,
        string FullName,
        bool Female,
        int Age,
        DateTime BirthDate,
        IReadOnlyList<string> Roles,
        int? ClassYear,
        string? ClassLetter,
        IReadOnlyList<LabeledStatResponse> Body,
        IReadOnlyList<LabeledStatResponse> Skills,
        IReadOnlyList<DefLabelResponse> Traits,
        IReadOnlyList<NeedStatResponse> Needs,
        PersonFamilyResponse Family);

    private sealed record LabeledStatResponse(string Id, string Label, string Value);

    private sealed record NeedStatResponse(string Id, string Label, float Value);

    private sealed record PersonFamilyResponse(
        IReadOnlyList<PersonRelResponse> Parents,
        IReadOnlyList<PersonRelResponse> Children,
        IReadOnlyList<PersonRelResponse> Siblings,
        IReadOnlyList<PersonRelResponse> Partners);

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