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>
/// FEEDBACK: the "Fehler melden" report sink.
///  - POST /feedback persists a row (with captured debug context) and GET /feedback returns it.
///  - Validation: an empty message is rejected with 400.
///  - CRITICAL: feedback rows survive the import re-ingest wipe (loose, FK-free GerbilId/LitterId).
/// </summary>
public class FeedbackEndpointTests : IClassFixture<ApiFactory>
{
    private readonly ApiFactory _factory;
    public FeedbackEndpointTests(ApiFactory factory) => _factory = factory;

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

        var gerbilId = Guid.NewGuid();
        var resp = await client.PostAsJsonAsync("/feedback", new
        {
            message = "Der Stammbaum zeigt den falschen Vater.",
            context = "stammbaum",
            gerbilId,
            litterId = (Guid?)null,
            entityName = "Krümel",
            url = "http://localhost:5173/rennmaeuse/kruemel/stammbaum",
            clientTimestamp = "2026-06-22T12:00:00Z",
        });

        Assert.Equal(HttpStatusCode.Created, resp.StatusCode);
        var created = JsonDocument.Parse(await resp.Content.ReadAsStringAsync()).RootElement;
        Assert.False(string.IsNullOrEmpty(created.GetProperty("id").GetString()));
        Assert.Equal("stammbaum", created.GetProperty("context").GetString());
        Assert.Equal("Krümel", created.GetProperty("entityName").GetString());
        Assert.Equal(gerbilId.ToString(), created.GetProperty("gerbilId").GetString());

        // A freshly created ticket starts Open with no ResolvedAt.
        Assert.Equal("Open", created.GetProperty("status").GetString());
        Assert.Equal(JsonValueKind.Null, created.GetProperty("resolvedAt").ValueKind);

        // GET returns it (newest first)
        var listed = JsonDocument.Parse(await client.GetStringAsync("/feedback")).RootElement;
        Assert.Contains(listed.EnumerateArray(),
            f => f.GetProperty("entityName").GetString() == "Krümel"
                 && f.GetProperty("message").GetString() == "Der Stammbaum zeigt den falschen Vater."
                 && f.GetProperty("status").GetString() == "Open");
    }

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

        // Create
        var create = await client.PostAsJsonAsync("/feedback", new
        {
            message = "Gewicht wird falsch gerundet.",
            context = "gerbil-detail",
            entityName = "Balu",
        });
        Assert.Equal(HttpStatusCode.Created, create.StatusCode);
        var id = JsonDocument.Parse(await create.Content.ReadAsStringAsync()).RootElement.GetProperty("id").GetString();
        Assert.False(string.IsNullOrEmpty(id));

        // List contains it
        var listed = JsonDocument.Parse(await client.GetStringAsync("/feedback")).RootElement;
        Assert.Contains(listed.EnumerateArray(), f => f.GetProperty("id").GetString() == id);

        // Edit message
        var edit = await client.PutAsJsonAsync($"/feedback/{id}", new { message = "Gewicht wird falsch gerundet (auf der Verlaufskurve)." });
        Assert.Equal(HttpStatusCode.OK, edit.StatusCode);
        var edited = JsonDocument.Parse(await edit.Content.ReadAsStringAsync()).RootElement;
        Assert.Equal("Gewicht wird falsch gerundet (auf der Verlaufskurve).", edited.GetProperty("message").GetString());
        Assert.Equal("Open", edited.GetProperty("status").GetString());

        // Empty message is rejected
        var empty = await client.PutAsJsonAsync($"/feedback/{id}", new { message = "   " });
        Assert.Equal(HttpStatusCode.BadRequest, empty.StatusCode);

        // Mark resolved -> ResolvedAt is set
        var resolve = await client.PutAsJsonAsync($"/feedback/{id}", new { status = "Resolved" });
        Assert.Equal(HttpStatusCode.OK, resolve.StatusCode);
        var resolved = JsonDocument.Parse(await resolve.Content.ReadAsStringAsync()).RootElement;
        Assert.Equal("Resolved", resolved.GetProperty("status").GetString());
        Assert.NotEqual(JsonValueKind.Null, resolved.GetProperty("resolvedAt").ValueKind);

        // Reopen -> ResolvedAt cleared
        var reopen = await client.PutAsJsonAsync($"/feedback/{id}", new { status = "Open" });
        Assert.Equal(HttpStatusCode.OK, reopen.StatusCode);
        var reopened = JsonDocument.Parse(await reopen.Content.ReadAsStringAsync()).RootElement;
        Assert.Equal("Open", reopened.GetProperty("status").GetString());
        Assert.Equal(JsonValueKind.Null, reopened.GetProperty("resolvedAt").ValueKind);

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

        var delAgain = await client.DeleteAsync($"/feedback/{id}");
        Assert.Equal(HttpStatusCode.NotFound, delAgain.StatusCode);

        var editGone = await client.PutAsJsonAsync($"/feedback/{id}", new { message = "noch da?" });
        Assert.Equal(HttpStatusCode.NotFound, editGone.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($"/feedback/{missing}", new { message = "x" })).StatusCode);
        Assert.Equal(HttpStatusCode.NotFound, (await client.DeleteAsync($"/feedback/{missing}")).StatusCode);
    }

    [Fact]
    public async Task Post_feedback_rejects_empty_message()
    {
        var client = _factory.CreateClient();
        var resp = await client.PostAsJsonAsync("/feedback", new { message = "   ", context = "gerbil-detail" });
        Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
    }

    [Fact]
    public async Task Feedback_survives_ingest_wipe()
    {
        // Fresh in-memory DB seeded with a resolved import file (mirrors IngestResolvedServiceTests).
        var dir = Path.Combine(Path.GetTempPath(), "feedback-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("feedback-ingest-" + Guid.NewGuid().ToString("N"))
                .Options;
            using var db = new ApplicationContext(opts);
            db.Database.EnsureCreated();

            // A feedback report referencing the gerbil + litter that the wipe will delete.
            var feedbackId = Guid.NewGuid();
            db.Feedback.Add(new Feedback
            {
                Id = feedbackId,
                Message = "Bitte prüfen.",
                Context = "gerbil-detail",
                GerbilId = fatherId,
                LitterId = litterId,
                EntityName = "Papa",
                Url = "http://localhost/rennmaeuse/papa",
                CreatedAt = DateTimeOffset.UtcNow,
                Status = "Resolved",
                ResolvedAt = DateTimeOffset.UtcNow,
            });
            // A contact-scoped feedback report — the ContactId is a loose (FK-free) id,
            // so it must survive the contact-table wipe just like gerbil/litter ids.
            var contactFeedbackId = Guid.NewGuid();
            db.Feedback.Add(new Feedback
            {
                Id = contactFeedbackId,
                Message = "Adresse stimmt nicht.",
                Context = "contact-detail",
                ContactId = contactId,
                EntityName = "Test Breeder",
                Url = "http://localhost/kontakte/test-breeder",
                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 feedback is untouched.
            var survivor = await db.Feedback.SingleAsync(f => f.Id == feedbackId);
            Assert.Equal(fatherId, survivor.GerbilId);   // loose id preserved even though the gerbil row was deleted/recreated
            Assert.Equal(litterId, survivor.LitterId);
            Assert.Equal("Papa", survivor.EntityName);
            Assert.Equal("Resolved", survivor.Status);   // ticket status column survives the wipe
            Assert.NotNull(survivor.ResolvedAt);

            // The contact-scoped report also survives the contacts wipe (loose ContactId).
            var contactSurvivor = await db.Feedback.SingleAsync(f => f.Id == contactFeedbackId);
            Assert.Equal(contactId, contactSurvivor.ContactId);
            Assert.Equal("contact-detail", contactSurvivor.Context);
            Assert.Equal("Test Breeder", contactSurvivor.EntityName);
            Assert.Equal(2, await db.Feedback.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,
    };
}