using DiunaBIWebAPI.dataProcessors;
using Google.Apis.Sheets.v4;
using Microsoft.EntityFrameworkCore;
using WebAPI.Controllers;
using WebAPI.Models;

namespace WebAPI.dataProcessors
{
    public class T3SourceYearSummaryProcessor
    {
        private readonly AppDbContext db;
        private readonly SpreadsheetsResource.ValuesResource googleSheetValues;
        private readonly LayersController controller;

        public T3SourceYearSummaryProcessor(
            AppDbContext _db,
            SpreadsheetsResource.ValuesResource _googleSheetValues,
            LayersController _controller
            )
        {
            db = _db;
            googleSheetValues = _googleSheetValues;
            controller = _controller;
        }

        public void process(Layer processWorker)
        {
            string? year = processWorker?.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1;
            string? source = processWorker?.Records?.SingleOrDefault(x => x.Code == "Source")?.Desc1;
            if (source == null)
            {
                throw new Exception("Source record not found");
            }
            Layer? processedLayer = db.Layers
                                    .Where(x => x.ParentId == processWorker!.Id
                                                && !x.IsDeleted)
                                    .OrderByDescending(x => x.CreatedAt)
                                    .FirstOrDefault();

            bool isNew = false;
            if (processedLayer == null)
            {
                isNew = true;
                processedLayer = new Layer
                {
                    Id = Guid.NewGuid(),
                    Source = "",
                    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.Sources = new List<ProcessSource>();
            processedLayer.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
            processedLayer.ModifiedAt = DateTime.UtcNow;

            List<Record> newRecords = new List<Record>();

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

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

            List<Record> allRecords = dataSources.SelectMany(x => x.Records!).ToList();

            foreach (Record baseRecord in dataSources.Last()?.Records!)
            {
                List<Record> codeRecords = allRecords.Where(x => x.Code == baseRecord.Code).ToList();
                Record 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();
        }
    }
}