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


namespace WebAPI.dataProcessors;

public class T4R2Processor
{
    private readonly AppDbContext _db;
    private readonly LayersController _controller;
    private readonly LogsController _logsController;

    public T4R2Processor(
        AppDbContext db,
        LayersController controller,
        LogsController logsController)
    {
        _db = db;
        _controller = controller;
        _logsController = logsController;
    }

    public void Process(Layer processWorker)
    {
        var year = int.Parse(processWorker.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1!);
        var sources = processWorker.Records?.Where(x => x.Code == "Source").ToList();
        if (!sources!.Any())
        {
            throw new Exception("Source record not found");
        }

        var layerName = processWorker.Records?.SingleOrDefault(x => x.Code == "LayerName")?.Desc1;
        if (layerName == null)
        {
            throw new Exception("LayerName record not found");
        }


        var processedLayer = _db.Layers
            .Where(x => x.ParentId == processWorker.Id
                        && !x.IsDeleted)
            .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}-{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.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
        processedLayer.ModifiedAt = DateTime.UtcNow;


        var newRecords = new List<Record>();

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

            for (var month = 1; month <= DateTime.UtcNow.Month; month++)
            {
                var monthCopy = month;
                var dataSource = _db.Layers.Where(x =>
                        x.Type == LayerType.Processed &&
                        !x.IsDeleted &&
                        x.Name != null && x.Name.Contains($"{year}/{monthCopy}-{source.Desc1}-T")
                    )
                    .Include(x => x.Records)
                    .FirstOrDefault();
                if (dataSource != null)
                {
                    var news = dataSource.Records!
                        .Where(x => sourceCodes.Count <= 0 || sourceCodes.Contains(int.Parse(x.Code!)))
                        .Select(x =>
                            {
                                var 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
            var 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)
            {
                var news = dataSourceSum.Records!
                    .Where(x => sourceCodes.Count <= 0 || sourceCodes.Contains(int.Parse(x.Code!)))
                    .Select(x =>
                        {
                            var 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
                });
            }
        }
            
        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();
    }
}