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

namespace WebAPI.dataProcessors
{
    public class T3MultiSourceYearSummaryProcessor
    {
        private readonly AppDbContext db;
        private readonly SpreadsheetsResource.ValuesResource googleSheetValues;
        private readonly LayersController controller;

        public T3MultiSourceYearSummaryProcessor(
            AppDbContext _db,
            SpreadsheetsResource.ValuesResource _googleSheetValues,
            LayersController _controller)
        {
            db = _db;
            googleSheetValues = _googleSheetValues;
            controller = _controller;
        }

        public void process(Layer processWorker)
        {
            int year = int.Parse(processWorker!.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1!);
            List<Record>? sources = processWorker.Records?.Where(x => x.Code == "Source").ToList();
            if (sources!.Count() == 0)
            {
                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-AA-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>();
            foreach (Record source in sources!)
            {
                Layer? dataSource = db.Layers.Where(x =>
                    x.Type == LayerType.processed &&
                    !x.IsDeleted &&
                    x.Name != null && x.Name.Contains($"{year}/13-{source.Desc1}-T3")
                    )
                    .Include(x => x.Records)
                    .FirstOrDefault();
                if (dataSource != null)
                {
                    dataSources.Add(dataSource);
                }
            }
            if (dataSources.Count == 0)
            {
                throw new Exception($"DataSources are empty");
            }

            List<Layer> dataSourcesValidation = 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($"{year}/{i}-AA-T3"))
                    .Include(x => x.Records)
                    .FirstOrDefault();
                if (dataSource != null)
                {
                    dataSourcesValidation.Add(dataSource!);
                }
            }
            if (dataSources.Count == 0)
            {
                throw new Exception($"DataSourcesValidation are empty");
            }


            List<Record> allRecords = dataSources
                .SelectMany(x => x.Records!).ToList();
            List<Record> allRecordsValidation = dataSources
                .SelectMany(x => x.Records!).ToList();
            foreach (Record baseRecord in dataSources.Last()?.Records!)
            {

                List<Record> codeRecords = allRecords.Where(x =>
                    x.Code!.Substring(1) == baseRecord.Code!.Substring(1))
                    .ToList();
                List<Record> codeRecordsValidation = allRecords.Where(x =>
                    x.Code!.Substring(1) == baseRecord.Code!.Substring(1))
                    .ToList();
                Record processedRecord = new Record
                {
                    Id = Guid.NewGuid(),
                    Code = $"19{baseRecord.Code!.Remove(0,1)}",
                    CreatedAt = DateTime.UtcNow,
                    ModifiedAt = DateTime.UtcNow
                };
                Record validationRecord = new Record();
                for (var i = 1; i < 33; i++)
                {
                    ProcessHelper.setValue(processedRecord, i,
                        codeRecords.Sum(x => ProcessHelper.getValue(x, i)));

                    ProcessHelper.setValue(validationRecord, i,
                        codeRecordsValidation.Sum(x => ProcessHelper.getValue(x, i)));

                    if (
                        ProcessHelper.getValue(processedRecord,i) !=
                            ProcessHelper.getValue(validationRecord, i))
                    {
                        throw new Exception($"ValidationError: Code {baseRecord.Code!}, " +
                            $"Value{i} ({ProcessHelper.getValue(processedRecord, i)} | " +
                            $"{ProcessHelper.getValue(validationRecord, 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();
        }
    }
}