using DiunaBIWebAPI.dataProcessors;
using Microsoft.EntityFrameworkCore;
using WebAPI.Controllers;
using WebAPI.Models;

namespace WebAPI.dataProcessors;

public class T3MultiSourceCopySelectedCodesProcessor
{
    private readonly AppDbContext _db;
    private readonly LayersController _controller;

    public T3MultiSourceCopySelectedCodesProcessor(
        AppDbContext db,
        LayersController controller)
    {
        _db = db;
        _controller = controller;
    }

    public void Process(Layer processWorker)
    {
        var year = int.Parse(processWorker.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1!);
        var month = int.Parse(processWorker.Records?.SingleOrDefault(x => x.Code == "Month")?.Desc1!);
        var sources = processWorker.Records?.Where(x => x.Code == "Source").ToList();
        if (sources!.Count == 0)
        {
            throw new Exception("Source record not found");
        }
        var codes = processWorker.Records?.SingleOrDefault(x => x.Code == "Codes")?.Desc1;
        if (codes == null)
        {
            throw new Exception("Codes record not found");
        }

        var codesList = ProcessHelper.ParseCodes(codes);

        var processedLayer = _db.Layers
            .Where(x => x.ParentId == processWorker.Id
                        && !x.IsDeleted)
            .OrderByDescending(x => x.CreatedAt)
            .FirstOrDefault();

        var isNew = false;
        if (processedLayer == null)
        {
            isNew = true;
            processedLayer = new Layer
            {
                Id = Guid.NewGuid(),
                Type = LayerType.Processed,
                ParentId = processWorker.Id,
                Number = _db.Layers.Count() + 1
            };
            processedLayer.Name = $"L{processedLayer.Number}-P-{year}/{month}-AB-T3";
            processedLayer.CreatedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
            processedLayer.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
            processedLayer.CreatedAt = DateTime.UtcNow;
            processedLayer.ModifiedAt = DateTime.UtcNow;
        }

        processedLayer.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
        processedLayer.ModifiedAt = DateTime.UtcNow;

        var dataSources = sources.Select(source => _db.Layers.Where(x => x.Type == LayerType.Processed && !x.IsDeleted && x.Name != null && x.Name.Contains($"{year}/{month}-{source.Desc1}-T3"))
                .Include(x => x.Records)
                .FirstOrDefault())
            .OfType<Layer>()
            .ToList();
        if (dataSources.Count == 0)
        {
            throw new Exception("DataSources are empty");
        }


        var newRecords = dataSources
            .SelectMany(x => x.Records!)
            .Where(x => codesList.Contains(int.Parse(x.Code!)))
            .Select(x =>
            {
                var newRecord = new Record
                {
                    Id = Guid.NewGuid(),
                    Code = x.Code,
                    CreatedAt = DateTime.UtcNow,
                    ModifiedAt = DateTime.UtcNow
                };
                for (var i = 1; i < 33; i++)
                {
                    ProcessHelper.SetValue(newRecord, i, ProcessHelper.GetValue(x, i));
                }
                return newRecord;
            })
            .ToList();
        if (isNew)
        {
            _db.Layers.Add(processedLayer);
        }
        else
        {
            _db.Layers.Update(processedLayer);
        }
        _controller.SaveRecords(processedLayer.Id, newRecords, Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D"));
        _db.SaveChanges();
    }
}