using BotSharp.Abstraction.Graph.Models;
using BotSharp.Abstraction.Knowledges.Models;
using BotSharp.Abstraction.VectorStorage.Models;
using BotSharp.OpenAPI.ViewModels.Knowledges;
using System.Reflection.Metadata.Ecma335;

namespace BotSharp.OpenAPI.Controllers;

[Authorize]
[ApiController]
public class KnowledgeBaseController : ControllerBase
{
    private readonly IKnowledgeService _knowledgeService;
    private readonly IServiceProvider _services;

    public KnowledgeBaseController(IKnowledgeService knowledgeService, IServiceProvider services)
    {
        _knowledgeService = knowledgeService;
        _services = services;
    }

    [HttpGet("knowledge/vector/collections")]
    public async Task<IEnumerable<string>> GetVectorCollections()
    {
        return await _knowledgeService.GetVectorCollections();
    }

    [HttpPost("/knowledge/vector/{collection}/search")]
    public async Task<IEnumerable<VectorKnowledgeViewModel>> SearchVectorKnowledge([FromRoute] string collection, [FromBody] SearchVectorKnowledgeRequest request)
    {
        var options = new VectorSearchOptions
        {
            Fields = request.Fields,
            Limit = request.Limit ?? 5,
            Confidence = request.Confidence ?? 0.5f,
            WithVector = request.WithVector
        };

        var results = await _knowledgeService.SearchVectorKnowledge(request.Text, collection, options);
        return results.Select(x => VectorKnowledgeViewModel.From(x)).ToList();
    }

    [HttpPost("/knowledge/vector/{collection}/data")]
    public async Task<StringIdPagedItems<VectorKnowledgeViewModel>> GetVectorCollectionData([FromRoute] string collection, [FromBody] VectorFilter filter)
    {
        var data = await _knowledgeService.GetVectorCollectionData(collection, filter);
        var items = data.Items?.Select(x => VectorKnowledgeViewModel.From(x))?
                               .ToList() ?? new List<VectorKnowledgeViewModel>();

        return new StringIdPagedItems<VectorKnowledgeViewModel>
        {
            Count = data.Count,
            NextId = data.NextId,
            Items = items
        };
    }

    [HttpPut("/knowledge/vector/{collection}/update")]
    public async Task<bool> UpdateVectorKnowledge([FromRoute] string collection, [FromBody] VectorKnowledgeUpdateRequest request)
    {
        var update = new VectorUpdateModel
        {
            Id = request.Id,
            Text = request.Text,
            Payload = request.Payload
        };

        var updated = await _knowledgeService.UpdateVectorCollectionData(collection, update);
        return updated;
    }

    [HttpDelete("/knowledge/vector/{collection}/data/{id}")]
    public async Task<bool> DeleteVectorCollectionData([FromRoute] string collection, [FromRoute] string id)
    {
        return await _knowledgeService.DeleteVectorCollectionData(collection, id);
    }

    [HttpPost("/knowledge/vector/{collection}/upload")]
    public async Task<IActionResult> UploadVectorKnowledge([FromRoute] string collection, IFormFile file, [FromForm] int? startPageNum, [FromForm] int? endPageNum)
    {
        var setttings = _services.GetRequiredService<FileCoreSettings>();
        var textConverter = _services.GetServices<IPdf2TextConverter>().FirstOrDefault(x => x.Name == setttings.Pdf2TextConverter);

        var filePath = Path.GetTempFileName();
        using (var stream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
        {
            await file.CopyToAsync(stream);
            await stream.FlushAsync();
        }

        var content = await textConverter.ConvertPdfToText(filePath, startPageNum, endPageNum);
        await _knowledgeService.FeedVectorKnowledge(collection, new KnowledgeCreationModel
        {
            Content = content
        });

        System.IO.File.Delete(filePath);
        return Ok(new { count = 1, file.Length });
    }

    [HttpPost("/knowledge/graph/search")]
    public async Task<GraphKnowledgeViewModel> SearchGraphKnowledge([FromBody] SearchGraphKnowledgeRequest request)
    {
        var options = new GraphSearchOptions
        {
            Method = request.Method
        };

        var result = await _knowledgeService.SearchGraphKnowledge(request.Query, options);
        return new GraphKnowledgeViewModel
        {
            Result = result.Result
        };
    }

    [HttpPost("/knowledge/search")]
    public async Task<KnowledgeSearchViewModel> SearchKnowledge([FromBody] SearchKnowledgeRequest request)
    {
        var vectorOptions = new VectorSearchOptions
        {
            Fields = request.VectorParams.Fields,
            Limit = request.VectorParams.Limit ?? 5,
            Confidence = request.VectorParams.Confidence ?? 0.5f,
            WithVector = request.VectorParams.WithVector
        };

        var graphOptions = new GraphSearchOptions
        {
            Method = request.GraphParams.Method
        };

        var result = await _knowledgeService.SearchKnowledge(request.Text, request.VectorParams.Collection, vectorOptions, graphOptions);
        return new KnowledgeSearchViewModel
        {
            VectorResult = result?.VectorResult?.Select(x => VectorKnowledgeViewModel.From(x)),
            GraphResult = result?.GraphResult != null ? new GraphKnowledgeViewModel { Result = result.GraphResult.Result } : null
        };
    }
}