using System.Globalization;
using DiunaBIWebAPI.dataProcessors;
using Google.Apis.Sheets.v4;
using Google.Apis.Sheets.v4.Data;
using Microsoft.AspNetCore.Http.HttpResults;
using Microsoft.EntityFrameworkCore;
using WebAPI.Controllers;
using WebAPI.Models;


namespace WebAPI.dataProcessors
{
    public class T4R2Processor
    {
        private readonly AppDbContext db;
        private readonly SpreadsheetsResource.ValuesResource googleSheetValues;
        private readonly LayersController controller;
        private readonly LogsController logsController;

        public T4R2Processor(
            AppDbContext _db,
            SpreadsheetsResource.ValuesResource _googleSheetValues,
            LayersController _controller,
            LogsController _logsController)
        {
            db = _db;
            googleSheetValues = _googleSheetValues;
            controller = _controller;
            logsController = _logsController;
        }

        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");
            }

            string? layerName = processWorker.Records?.SingleOrDefault(x => x.Code == "LayerName")?.Desc1;
            if (layerName == null)
            {
                throw new Exception("LayerName 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}-{layerName}";
                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>();

            foreach (Record source in sources!)
            {
                string? rawSourceCodes = processWorker.Records?.SingleOrDefault(x => x.Code == $"Codes-{source.Desc1}")
                    ?.Desc1;
                List<int> sourceCodes = new List<int>();
                if (rawSourceCodes != null)
                {
                    sourceCodes = ProcessHelper.parseCodes(rawSourceCodes);
                }

                for (int month = 1; month <= DateTime.UtcNow.Month; month++)
                {
                    Layer? dataSource = db.Layers.Where(x =>
                            x.Type == LayerType.processed &&
                            !x.IsDeleted &&
                            x.Name != null && x.Name.Contains($"{year}/{month}-{source.Desc1}-T")
                        )
                        .Include(x => x.Records)
                        .FirstOrDefault();
                    if (dataSource != null)
                    {
                        List<Record> news = dataSource.Records!
                            .Where(x =>
                            {
                                if (sourceCodes.Count > 0)
                                {
                                    return sourceCodes.Contains(int.Parse(x.Code!));
                                }

                                return true; // get all
                            })
                            .Select(x =>
                                {
                                    Record newRecord = new Record
                                    {
                                        Id = Guid.NewGuid(),
                                        Code = x.Code + month.ToString("D2"),
                                        CreatedAt = DateTime.UtcNow,
                                        ModifiedAt = DateTime.UtcNow,
                                        Value1 = source.Desc1 != "FK2" ? x.Value32 : x.Value1,
                                        Desc1 = x.Desc1
                                    };
                                    return newRecord;   
                                }
                            ).ToList();
                        newRecords.AddRange(news);
                    }
                    else
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{processWorker!.Name}, {processWorker.Id}",
                            Type = LogEntryType.warning,
                            LogType = LogType.process,
                            Message = $"Data source {year}/{month}-{source.Desc1}-T3 not found",
                            CreatedAt = DateTime.UtcNow
                        });
                    }
                }
                
                // year summery
                Layer? dataSourceSum = db.Layers.Where(x =>
                            x.Type == LayerType.processed &&
                            !x.IsDeleted &&
                            x.Name != null && x.Name.Contains($"{year}/13-{source.Desc1}-T")
                        )
                        .Include(x => x.Records)
                        .FirstOrDefault();
                    if (dataSourceSum != null)
                    {
                        List<Record> news = dataSourceSum.Records!
                            .Where(x =>
                            {
                                if (sourceCodes.Count > 0)
                                {
                                    return sourceCodes.Contains(int.Parse(x.Code!));
                                }

                                return true; // get all
                            })
                            .Select(x =>
                                {
                                    Record newRecord = new Record
                                    {
                                        Id = Guid.NewGuid(),
                                        Code = x.Code + "13",
                                        CreatedAt = DateTime.UtcNow,
                                        ModifiedAt = DateTime.UtcNow,
                                        Value1 = x.Value32 
                                    };
                                    return newRecord;   
                                }
                            ).ToList();
                        newRecords.AddRange(news);
                    }
                    else
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{processWorker!.Name}, {processWorker.Id}",
                            Type = LogEntryType.warning,
                            LogType = LogType.process,
                            Message = $"Data source {year}/13-{source.Desc1}-T3 not found",
                            CreatedAt = DateTime.UtcNow
                        });
                    }
            }

            /*
            // year summary
            Layer? dataSourceSum = 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 (dataSourceSum != null)
            {
                dataSources.Add(dataSourceSum);
            }
            else
            {
                logsController.AddEntry(new LogEntry
                {
                    Title = $"{processWorker!.Name}, {processWorker.Id}",
                    Type = LogEntryType.warning,
                    LogType = LogType.process,
                    Message = $"Data source {year}/13-{source.Desc1}-T3 not found",
                    CreatedAt = DateTime.UtcNow
                });
            }
        }

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

        List<Record> newRecords = dataSources
            .SelectMany(x => x.Records!)
            .Where(x => codesList.Contains(int.Parse(x.Code!)))
            .Select(x =>
            {
                Layer? layer = dataSources.SingleOrDefault(y => y.Id == x.LayerId);
                string postFix = layer!.Name!.Split("/")[1].Split("-")[0];
                if (postFix.Length == 1)
                {
                    postFix = "0" + postFix;
                }

                Record newRecord = new Record
                {
                    Id = Guid.NewGuid(),
                    Code = x.Code + postFix,
                    CreatedAt = DateTime.UtcNow,
                    ModifiedAt = DateTime.UtcNow,
                    Value1 = x.Value32
                };

                return newRecord;
            })
            .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();
        }
    }
}