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

namespace WebAPI.dataProcessors;

public class T4SingleSourceProcessor(
    AppDbContext db,
    LayersController 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 sourceLayer = processWorker.Records?.SingleOrDefault(x => x.Code == "SourceLayer")?.Desc1;
        if (sourceLayer == null)
        {
            throw new Exception("SourceLayer record not found");
        }
        var sourceImportWorker = db.Layers.SingleOrDefault(x => x.Name == sourceLayer);
        if (sourceImportWorker == null)
        {
            throw new Exception("SourceImportWorkerL layer not found");
        }
        var source= processWorker.Records?.SingleOrDefault(x => x.Code == "Source")?.Desc1;
        if (sourceLayer == null)
        {
            throw new Exception("Source record not found");
        }

        var processedLayer = db.Layers
            .Where(x => x.ParentId == processWorker.Id)
            .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:D2}-{source}-T4";
            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 dataSource = db.Layers
            .Include(x => x.Records)
            .Where(x => x.ParentId == sourceImportWorker.Id
                        && !x.IsDeleted)
            .OrderByDescending(x => x.CreatedAt)
            .FirstOrDefault();
            
        if (dataSource == null)
        {
            throw new Exception($"DataSource not found, {sourceImportWorker.Name}");
        }

        var newRecords = dataSource.Records!.Select(record => new Record
            {
                Id = Guid.NewGuid(),
                Code = record.Code,
                Desc1 = record.Desc1,
                Value1 = record.Value1,
                CreatedAt = DateTime.UtcNow,
                ModifiedAt = DateTime.UtcNow
            })
            .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();
    }
        
}