using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using BLAIzor.Data;
using BLAIzor.Models;
using BLAIzor.Services;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Moq;
using Xunit;

namespace SeemGen.Tests;
public class ContentEditorServiceTests
{
    [Fact]
    public async Task SaveAndSyncContentItemAsync_UpdatesFieldsAndRechunks_WhenContentChanged()
    {
        // Arrange
        var contentItemId = 1;
        var oldContent = "Old content";
        var newContent = "New content for chunking";
        var collectionName = "test_collection";

        var contentGroup = new ContentGroup { Id = 1, Name = "Group", SiteInfoId = 1, Items = new List<ContentItem>() };
        var existingChunks = new List<ContentChunk>
        {
            new ContentChunk { Id = 1, ContentItemId = contentItemId, QdrantPointId = Guid.NewGuid().ToString(), ChunkIndex = 0, CreatedAt = DateTime.UtcNow }
        };
        var existingItem = new ContentItem
        {
            Id = contentItemId,
            Title = "Old Title",
            Description = "Old Desc",
            Content = oldContent,
            Language = "en",
            Tags = "tag1",
            IsPublished = true,
            LastUpdated = DateTime.UtcNow,
            ContentGroup = contentGroup,
            Chunks = existingChunks
        };
        contentGroup.Items.Add(existingItem);

        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString())
            .Options;
        var dbContext = new ApplicationDbContext(options);
        dbContext.ContentItems.Add(existingItem);
        dbContext.ContentChunks.AddRange(existingChunks);
        dbContext.SaveChanges();

        var serviceScopeFactoryMock = new Mock<IServiceScopeFactory>();
        var scopeMock = new Mock<IServiceScope>();
        var providerMock = new Mock<IServiceProvider>();
        providerMock.Setup(x => x.GetService(typeof(ApplicationDbContext))).Returns(dbContext);
        scopeMock.Setup(x => x.ServiceProvider).Returns(providerMock.Object);
        serviceScopeFactoryMock.Setup(x => x.CreateScope()).Returns(scopeMock.Object);

        var qdrantServiceMock = new Mock<QDrantService>(null);
        qdrantServiceMock.Setup(x => x.DeletePointsAsync(It.IsAny<Guid[]>(), collectionName)).Returns(Task.CompletedTask);
        qdrantServiceMock.Setup(x => x.QDrantInsertManyAsync(It.IsAny<List<WebPageContent>>(), collectionName)).Returns(Task.CompletedTask);

        var openAIEmbeddingServiceMock = new Mock<OpenAIEmbeddingService>();
        openAIEmbeddingServiceMock.Setup(x => x.GenerateEmbeddingAsync(It.IsAny<string>())).ReturnsAsync(new float[] { 0.1f, 0.2f });

        var localEmbeddingServiceMock = new Mock<LocalEmbeddingService>();
        localEmbeddingServiceMock.Setup(x => x.GenerateEmbeddingAsync(It.IsAny<string>())).ReturnsAsync(new float[] { 0.1f, 0.2f });

        var openAIApiServiceMock = new Mock<OpenAIApiService>(MockBehavior.Loose, null, null);
        var htmlSnippetProcessorMock = new Mock<HtmlSnippetProcessor>(qdrantServiceMock.Object, openAIEmbeddingServiceMock.Object, localEmbeddingServiceMock.Object, null);
        var scopedContentServiceMock = new Mock<ScopedContentService>(dbContext, serviceScopeFactoryMock.Object);

        var configMock = new Mock<IConfiguration>();
        configMock.Setup(x => x.GetSection("AiSettings").GetValue<string>("EmbeddingService")).Returns("openai");

        var service = new ContentEditorService(
            openAIApiServiceMock.Object,
            qdrantServiceMock.Object,
            openAIEmbeddingServiceMock.Object,
            localEmbeddingServiceMock.Object,
            htmlSnippetProcessorMock.Object,
            serviceScopeFactoryMock.Object,
            scopedContentServiceMock.Object,
            configMock.Object
        );

        var dto = new ContentItem
        {
            Id = contentItemId,
            Title = "New Title",
            Description = "New Desc",
            Content = newContent,
            Language = "fr",
            Tags = "tag2",
            IsPublished = false,
            LastUpdated = DateTime.UtcNow
        };

        // Act
        var result = await service.SaveAndSyncContentItemAsync(dto, collectionName, false);

        // Assert
        Assert.Equal(dto.Title, result.Title);
        Assert.Equal(dto.Description, result.Description);
        Assert.Equal(dto.Content, result.Content);
        Assert.Equal(dto.Language, result.Language);
        Assert.Equal(dto.Tags, result.Tags);
        Assert.Equal(dto.IsPublished, result.IsPublished);
        Assert.True(result.Version > 0);
        Assert.NotEmpty(dbContext.ContentChunks.Where(c => c.ContentItemId == contentItemId));
        qdrantServiceMock.Verify(x => x.DeletePointsAsync(It.IsAny<Guid[]>(), collectionName), Times.Once);
        qdrantServiceMock.Verify(x => x.QDrantInsertManyAsync(It.IsAny<List<WebPageContent>>(), collectionName), Times.Once);
    }
}