using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using GerbilManagerWebAPI.Import;
using GerbilManagerWebAPI.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;

namespace GerbilManager.Tests;

/// <summary>
/// EXHIBITION: show/exhibition results &amp; awards per animal (/exhibitions).
///  - POST creates a row; GET (optionally filtered by gerbilId) returns it, newest first.
///  - PUT edits, DELETE removes; unknown ids return 404; an empty EventName is rejected (400).
///  - CRITICAL: exhibition rows survive the import re-ingest wipe (loose, FK-free GerbilId).
/// </summary>
public class ExhibitionEndpointTests : IClassFixture<ApiFactory>
{
    private readonly ApiFactory _factory;
    public ExhibitionEndpointTests(ApiFactory factory) => _factory = factory;

    [Fact]
    public async Task Post_creates_and_get_filters_by_gerbilId()
    {
        var client = _factory.CreateClient();

        var gerbilId = Guid.NewGuid();
        var resp = await client.PostAsJsonAsync("/exhibitions", new
        {
            gerbilId,
            entityName = "Krümel",
            eventName = "Nationale Rennmausschau 2026",
            date = "2026-03-15T00:00:00Z",
            placement = "1. Platz",
            award = "Best in Show",
            note = "Sehr ausgeglichenes Tier.",
        });

        Assert.Equal(HttpStatusCode.Created, resp.StatusCode);
        var created = JsonDocument.Parse(await resp.Content.ReadAsStringAsync()).RootElement;
        var id = created.GetProperty("id").GetString();
        Assert.False(string.IsNullOrEmpty(id));
        Assert.Equal("Nationale Rennmausschau 2026", created.GetProperty("eventName").GetString());
        Assert.Equal("1. Platz", created.GetProperty("placement").GetString());
        Assert.Equal("Best in Show", created.GetProperty("award").GetString());
        Assert.Equal(gerbilId.ToString(), created.GetProperty("gerbilId").GetString());

        // GET filtered to this gerbil returns the row.
        var listed = JsonDocument.Parse(await client.GetStringAsync($"/exhibitions?gerbilId={gerbilId}")).RootElement;
        Assert.Contains(listed.EnumerateArray(),
            x => x.GetProperty("id").GetString() == id
                 && x.GetProperty("eventName").GetString() == "Nationale Rennmausschau 2026");

        // GET filtered to a DIFFERENT gerbil does not.
        var other = JsonDocument.Parse(await client.GetStringAsync($"/exhibitions?gerbilId={Guid.NewGuid()}")).RootElement;
        Assert.DoesNotContain(other.EnumerateArray(), x => x.GetProperty("id").GetString() == id);
    }

    [Fact]
    public async Task Crud_lifecycle_edit_and_delete()
    {
        var client = _factory.CreateClient();

        var create = await client.PostAsJsonAsync("/exhibitions", new
        {
            eventName = "Lokalschau",
            entityName = "Balu",
        });
        Assert.Equal(HttpStatusCode.Created, create.StatusCode);
        var id = JsonDocument.Parse(await create.Content.ReadAsStringAsync()).RootElement.GetProperty("id").GetString();

        // Edit: change placement + add a date.
        var edit = await client.PutAsJsonAsync($"/exhibitions/{id}", new
        {
            placement = "2. Platz",
            date = "2025-11-01T00:00:00Z",
        });
        Assert.Equal(HttpStatusCode.OK, edit.StatusCode);
        var edited = JsonDocument.Parse(await edit.Content.ReadAsStringAsync()).RootElement;
        Assert.Equal("2. Platz", edited.GetProperty("placement").GetString());
        Assert.Equal("Lokalschau", edited.GetProperty("eventName").GetString());

        // Delete -> 204, then 404 on subsequent edit/delete.
        var del = await client.DeleteAsync($"/exhibitions/{id}");
        Assert.Equal(HttpStatusCode.NoContent, del.StatusCode);
        Assert.Equal(HttpStatusCode.NotFound, (await client.DeleteAsync($"/exhibitions/{id}")).StatusCode);
        Assert.Equal(HttpStatusCode.NotFound, (await client.PutAsJsonAsync($"/exhibitions/{id}", new { eventName = "x" })).StatusCode);
    }

    [Fact]
    public async Task Post_rejects_empty_event_name()
    {
        var client = _factory.CreateClient();
        var resp = await client.PostAsJsonAsync("/exhibitions", new { eventName = "   " });
        Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
    }

    [Fact]
    public async Task Put_and_delete_unknown_id_return_404()
    {
        var client = _factory.CreateClient();
        var missing = Guid.NewGuid();
        Assert.Equal(HttpStatusCode.NotFound, (await client.PutAsJsonAsync($"/exhibitions/{missing}", new { eventName = "x" })).StatusCode);
        Assert.Equal(HttpStatusCode.NotFound, (await client.DeleteAsync($"/exhibitions/{missing}")).StatusCode);
    }

    [Fact]
    public async Task Exhibition_survives_ingest_wipe()
    {
        // Fresh in-memory DB seeded with a resolved import file (mirrors IngestResolvedServiceTests).
        var dir = Path.Combine(Path.GetTempPath(), "exhibition-ingest-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(dir);
        try
        {
            var contactId = Guid.NewGuid();
            var fatherId = Guid.NewGuid();
            var motherId = Guid.NewGuid();
            var litterId = Guid.NewGuid();

            var data = new
            {
                Contacts = new[]
                {
                    new { Id = contactId, Name = "Test Breeder", Email = "t@e.de", Phone = "", Address = "", Notes = (string?)null, IsBreeder = true, IsReceiver = false, NameSuffix = (string?)null, Provenance = (string?)null }
                },
                Litters = new[]
                {
                    new { Id = litterId, Name = "Wurf A", Date = "2026-01-01", TotalBorn = 5, DeathsWithin8Weeks = 0, FatherId = fatherId, MotherId = motherId, ExpectedGoHomeDate = (string?)null, Notes = "", PairingCode = "PC01", ExternalRef = "ext-litter-1", LitterLetter = "A" }
                },
                Gerbils = new[]
                {
                    Animal(fatherId, "Papa", "male", contactId),
                    Animal(motherId, "Mama", "female", contactId),
                },
                GerbilPhotos = Array.Empty<object>(),
            };
            File.WriteAllText(Path.Combine(dir, "resolved_import.json"), JsonSerializer.Serialize(data));

            var opts = new DbContextOptionsBuilder<ApplicationContext>()
                .UseInMemoryDatabase("exhibition-ingest-" + Guid.NewGuid().ToString("N"))
                .Options;
            using var db = new ApplicationContext(opts);
            db.Database.EnsureCreated();

            // An exhibition result referencing the gerbil that the wipe will delete/recreate.
            var exhId = Guid.NewGuid();
            db.ExhibitionResults.Add(new ExhibitionResult
            {
                Id = exhId,
                GerbilId = fatherId,
                EntityName = "Papa",
                EventName = "Nationale Rennmausschau 2026",
                Date = new DateTime(2026, 3, 15, 0, 0, 0, DateTimeKind.Utc),
                Placement = "1. Platz",
                Award = "Best in Show",
                Note = "Tolles Tier.",
                CreatedAt = DateTimeOffset.UtcNow,
            });
            await db.SaveChangesAsync();

            var config = new ConfigurationBuilder()
                .AddInMemoryCollection(new Dictionary<string, string?> { { "Import:SourcePath", dir } })
                .Build();

            // Run the ingest wipe + reload.
            var result = await new IngestResolvedService(db, config, null!).RunAsync();
            Assert.Contains("Ingestion successful!", result);

            // Gerbils/litters/contacts were wiped & re-created, but the exhibition row is untouched.
            var survivor = await db.ExhibitionResults.SingleAsync(x => x.Id == exhId);
            Assert.Equal(fatherId, survivor.GerbilId);     // loose id preserved even though the gerbil row was deleted/recreated
            Assert.Equal("Papa", survivor.EntityName);
            Assert.Equal("Nationale Rennmausschau 2026", survivor.EventName);
            Assert.Equal("1. Platz", survivor.Placement);
            Assert.Equal("Best in Show", survivor.Award);
            Assert.Equal(1, await db.ExhibitionResults.CountAsync());
        }
        finally
        {
            try { Directory.Delete(dir, recursive: true); } catch { /* best effort */ }
        }
    }

    private static object Animal(Guid id, string name, string gender, Guid contactId) => new
    {
        Id = id,
        Name = name,
        Gender = gender,
        Status = "Breeding",
        LitterId = (Guid?)null,
        OriginContactId = contactId,
        ReceiverContactId = (Guid?)null,
        EnclosureId = (Guid?)null,
        ColorVarietyId = new Guid("00000000-0000-0000-0000-000000000006"),
        DateOfBirth = "2025-01-01",
        DateOfDeath = (string?)null,
        CauseOfDeath = (string?)null,
        GoHomeDate = (string?)null,
        Genotype = "aa CC DD EE GG PP spsp rere",
        Notes = "",
        ImportSource = "docx-export",
        ExternalRef = "ext-" + name,
        RawImportData = "{}",
        OriginBreeder = "Test Zucht",
        NameSearch = name.ToLowerInvariant(),
        CharacterTraits = Array.Empty<string>(),
        CharacterNote = (string?)null,
        IsDeaf = false,
        IsResident = true,
    };
}