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

namespace WebAPI.dataProcessors;

public class T3SourceYearSummaryProcessor
{
    private readonly AppDbContext _db;
    private readonly LayersController _controller;

    public T3SourceYearSummaryProcessor(
        AppDbContext db,
        LayersController controller
    )
    {
        _db = db;
        _controller = controller;
    }

    public void Process(Layer processWorker)
    {
        var year = processWorker.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1;
        var source = processWorker.Records?.SingleOrDefault(x => x.Code == "Source")?.Desc1;
        if (source == null)
        {
            throw new Exception("Source record not found");
        }
        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}/13-{source}-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 newRecords = new List<Record>();

        var dataSources = new List<Layer>();
        for (var i=1; i<13; i++)
        {
            var i1 = i;
            var dataSource = _db.Layers.Where(x =>
                    x.Type == LayerType.Processed
                    && !x.IsDeleted
                    && x.Name!=null && x.Name.Contains($"{year}/{i1}-{source}-T3"))
                .Include(x => x.Records)
                .FirstOrDefault();
            if (dataSource != null)
            {
                dataSources.Add(dataSource);
            }
        }

        if (dataSources.Count == 0)
        {
            throw new Exception("DataSources are empty");
        }

        var allRecords = dataSources.SelectMany(x => x.Records!).ToList();

        foreach (var baseRecord in dataSources.Last().Records!)
        {
            var codeRecords = allRecords.Where(x => x.Code == baseRecord.Code).ToList();
            var processedRecord = new Record
            {
                Id = Guid.NewGuid(),
                Code = baseRecord.Code,
                CreatedAt = DateTime.UtcNow,
                ModifiedAt = DateTime.UtcNow
            };
            for (var i = 1; i < 33; i++)
            {
                ProcessHelper.SetValue(processedRecord, i,
                    codeRecords.Sum(x => ProcessHelper.GetValue(x, i)));
            }
            newRecords.Add(processedRecord);
        }

        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();
    }
}