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

namespace WebAPI.dataProcessors;

public class T3MultiSourceSummaryProcessor(
    AppDbContext db,
    LayersController controller,
    LogsController logsController)
{
    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 sources = processWorker.Records?.Where(x => x.Code == "Source").ToList();
        if (sources!.Count == 0)
        {
            throw new Exception("Source 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}-P-{year}/{month:D2}-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.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
        processedLayer.ModifiedAt = DateTime.UtcNow;

        var newRecords = new List<Record>();

        var dataSources = sources.Select(source => db.Layers.Where(x => x.Type == LayerType.Processed && !x.IsDeleted && x.Name != null && x.Name.Contains($"{year}/{month:D2}-{source.Desc1}-T3"))
                .Include(x => x.Records)
                .FirstOrDefault())
            .OfType<Layer>()
            .ToList();

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

        var allRecords = dataSources.SelectMany(x => x.Records!).ToList();
        var baseCodes = allRecords.Select(x => x.Code!.Remove(0, 1)).Distinct().ToList();
            
        foreach (var baseCode in baseCodes)
        {

            var codeRecords = allRecords.Where(x =>
                    x.Code![1..] == baseCode)
                .ToList();
            var processedRecord = new Record
            {
                Id = Guid.NewGuid(),
                Code = $"9{baseCode}",
                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);
        }
            
        // Dynamic Codes
        var dynamicCodes = processWorker.Records?
            .Where(x => x.Code!.Contains("DynamicCode-"))
            .OrderBy(x => int.Parse(x.Code!.Split('-')[1])).ToList();
        if (dynamicCodes != null && dynamicCodes.Count != 0)
        {
            foreach (var dynamicCode in dynamicCodes)
            {
                try
                {
                    if (dynamicCode.Desc1 == null)
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{processWorker.Name}, {processWorker.Id}",
                            Type = LogEntryType.Warning,
                            LogType = LogType.Process,
                            Message = $"Formula in Record {dynamicCode.Id} is missing.",
                            CreatedAt = DateTime.UtcNow
                        });
                        continue;
                    }
                    var calc = new BaseCalc(dynamicCode.Desc1);
                    if (!calc.IsFormulaCorrect()) 
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{processWorker.Name}, {processWorker.Id}",
                            Type = LogEntryType.Warning,
                            LogType = LogType.Process,
                            Message = $"Formula {calc.Expression} in Record {dynamicCode.Id} is not correct",
                            CreatedAt = DateTime.UtcNow
                        });
                        continue;
                    }

                    try
                    {
                        newRecords.Add(calc.CalculateT3(newRecords));
                    }
                    catch (Exception e)
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{processWorker.Name}, {processWorker.Id}",
                            Type = LogEntryType.Warning,
                            LogType = LogType.Process,
                            Message = $"Formula {calc.Expression} in Record {dynamicCode.Id} error: {e.Message}",
                            CreatedAt = DateTime.UtcNow
                        });
                    }
                }
                catch (Exception e)
                {
                    logsController.AddEntry(new LogEntry
                    {
                        Title = $"{processWorker.Name}, {processWorker.Id}",
                        Type = LogEntryType.Warning,
                        LogType = LogType.Process,
                        Message = $"Calculation error {dynamicCode.Id}: {e.Message} ",
                        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();
    }
}