using System.Net;
using System.Net.Http.Json;
using FluentAssertions;
using Microsoft.Extensions.DependencyInjection;
using PageManager.Api.Api.Dtos;
using PageManager.Api.Data;
using PageManager.Api.Data.Models;
using PageManager.Api.Tests.Integration.Fixtures;

namespace PageManager.Api.Tests.Integration;

[Collection("Postgres")]
public class ImportControllerTests : IAsyncLifetime
{
    private readonly TestWebAppFactory _factory;
    private readonly HttpClient _client;

    public ImportControllerTests(PostgresFixture postgres)
    {
        _factory = new TestWebAppFactory(postgres);
        _client  = _factory.CreateClient();
    }

    public async Task InitializeAsync()
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        await Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions
            .ExecuteSqlRawAsync(db.Database,
                "TRUNCATE import_queue_items, import_sources RESTART IDENTITY CASCADE");
    }

    public Task DisposeAsync()
    {
        _client.Dispose();
        _factory.Dispose();
        return Task.CompletedTask;
    }

    // ── GET /api/sources ──────────────────────────────────────────────────────

    [Fact]
    public async Task GetSources_EmptyDb_Returns200WithEmptyArray()
    {
        var response = await _client.GetAsync("/api/sources");
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var sources = await response.Content.ReadFromJsonAsync<ImportSourceDto[]>();
        sources.Should().BeEmpty();
    }

    [Fact]
    public async Task GetSources_SeededSource_ReturnsMappedDto()
    {
        await SeedSourceAsync(name: "My Library", type: ImportSourceType.Folder, path: "/books");

        var response = await _client.GetAsync("/api/sources");
        var sources  = await response.Content.ReadFromJsonAsync<ImportSourceDto[]>();

        sources.Should().HaveCount(1);
        sources![0].Name.Should().Be("My Library");
        sources[0].Type.Should().Be("folder");
        sources[0].Enabled.Should().BeTrue();
    }

    // ── PATCH /api/sources/{id} ───────────────────────────────────────────────

    [Fact]
    public async Task UpdateSource_Found_Returns200WithUpdatedEnabled()
    {
        var id = await SeedSourceAsync();

        var response = await _client.PatchAsJsonAsync($"/api/sources/{id}", new { enabled = false });

        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var dto = await response.Content.ReadFromJsonAsync<ImportSourceDto>();
        dto!.Enabled.Should().BeFalse();
    }

    [Fact]
    public async Task UpdateSource_NotFound_Returns404()
    {
        var response = await _client.PatchAsJsonAsync("/api/sources/missing-id", new { enabled = false });
        response.StatusCode.Should().Be(HttpStatusCode.NotFound);
    }

    // ── GET /api/queue ────────────────────────────────────────────────────────

    [Fact]
    public async Task GetQueue_EmptyDb_Returns200WithEmptyArray()
    {
        var response = await _client.GetAsync("/api/queue");
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var items = await response.Content.ReadFromJsonAsync<QueueItemDto[]>();
        items.Should().BeEmpty();
    }

    // ── DELETE /api/queue/{id} ────────────────────────────────────────────────

    [Fact]
    public async Task RemoveQueueItem_Found_Returns204()
    {
        var id = await SeedQueueItemAsync();
        var response = await _client.DeleteAsync($"/api/queue/{id}");
        response.StatusCode.Should().Be(HttpStatusCode.NoContent);
    }

    [Fact]
    public async Task RemoveQueueItem_NotFound_Returns404()
    {
        var response = await _client.DeleteAsync("/api/queue/missing-id");
        response.StatusCode.Should().Be(HttpStatusCode.NotFound);
    }

    // ── POST /api/queue/{id}/retry ────────────────────────────────────────────

    [Fact]
    public async Task RetryQueueItem_FailedItem_Returns204()
    {
        var id = await SeedQueueItemAsync(status: QueueItemStatus.Failed);
        var response = await _client.PostAsync($"/api/queue/{id}/retry", null);
        response.StatusCode.Should().Be(HttpStatusCode.NoContent);
    }

    [Fact]
    public async Task RetryQueueItem_NonFailedItem_Returns404()
    {
        var id = await SeedQueueItemAsync(status: QueueItemStatus.Completed);
        var response = await _client.PostAsync($"/api/queue/{id}/retry", null);
        response.StatusCode.Should().Be(HttpStatusCode.NotFound);
    }

    // ── Helpers ───────────────────────────────────────────────────────────────

    private async Task<string> SeedSourceAsync(
        string name = "Test Source",
        ImportSourceType type = ImportSourceType.Folder,
        string path = "/test")
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var source = new ImportSource { Name = name, Type = type, Path = path };
        db.ImportSources.Add(source);
        await db.SaveChangesAsync();
        return source.Id;
    }

    private async Task<string> SeedQueueItemAsync(
        string filename = "book.epub",
        QueueItemStatus status = QueueItemStatus.Queued)
    {
        using var scope = _factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var item = new ImportQueueItem { Filename = filename, Status = status, Source = "https://example.com" };
        db.ImportQueueItems.Add(item);
        await db.SaveChangesAsync();
        return item.Id;
    }
}