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

namespace WebAPI.dataProcessors;

public class T5LastValuesProcessor(
    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 && !x.IsDeleted && !x.IsCancelled);
        if (sourceImportWorker == null) throw new Exception("SourceImportWorker 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 
                        && !x.IsDeleted && !x.IsCancelled)
            .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}-T5";
            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 = db.Layers
            .Include(x => x.Records)
            .Where(x => x.ParentId == sourceImportWorker.Id
                        && !x.IsDeleted && !x.IsCancelled)
            .OrderByDescending(x => x.CreatedAt)
            .AsNoTracking()
            .ToList();

        if (dataSources.Count == 0) throw new Exception($"DataSource is empty, {sourceImportWorker.Name}");
        
        var codes = dataSources.SelectMany(x => x.Records!).Select(x => x.Code).Distinct().ToList();
        
        foreach (var code in codes)
        {
            var lastRecord = dataSources.SelectMany(x => x.Records!).Where(x => x.Code == code).OrderByDescending(x => x.CreatedAt).FirstOrDefault();
            if (lastRecord == null) continue;
            
            var processedRecord = new Record
            {
                Id = Guid.NewGuid(),
                Code = code,
                CreatedAt = DateTime.UtcNow,
                ModifiedAt = DateTime.UtcNow
            };
            
            for (var i = 1; i < 33; i++)
            {
                if (ProcessHelper.GetValue(lastRecord, i) != null)
                {
                    ProcessHelper.SetValue(processedRecord, i, ProcessHelper.GetValue(lastRecord, 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();
    }
}