using System.Globalization;
using Google.Apis.Sheets.v4;
using Google.Apis.Sheets.v4.Data;
using Microsoft.EntityFrameworkCore;
using DiunaBI.Core.Models;
using DiunaBI.Core.Database.Context;
using DiunaBI.Core.Services;
using DiunaBI.Core.Services.Calculations;
using Microsoft.Extensions.Logging;

namespace DiunaBI.Plugins.Morska.Processors;

public class T1R1Processor : MorskaBaseProcessor
{
    public override string ProcessorType => "T1.R1";

    private readonly AppDbContext _db;
    private readonly SpreadsheetsResource.ValuesResource _googleSheetValues;
    private readonly ILogger<T1R1Processor> _logger;

    public T1R1Processor(
        AppDbContext db,
        SpreadsheetsResource.ValuesResource googleSheetValues,
        ILogger<T1R1Processor> logger)
    {
        _db = db;
        _googleSheetValues = googleSheetValues;
        _logger = logger;
    }
    public override 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!.Count == 0)
        {
            throw new Exception("Source record not found");
        }

        var processedLayer = _db.Layers
            .Where(x => x.ParentId == processWorker.Id
                        && !x.IsDeleted && !x.IsCancelled)
            .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}-R1-T1";
            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 dynamicCodes = processWorker.Records?.Where(x => x.Code!.Contains("DynamicCode-"))
            .OrderBy(x => int.Parse(x.Code!.Split('-')[1]))
            .ToList();

        var newRecords = new List<Record>();

        for (var month = 1; month < 14; month++)
        {
            if (year > DateTime.UtcNow.Year || ((year == DateTime.UtcNow.Year && month > DateTime.UtcNow.Month && month != 13)))
            {
                continue;
            }

            var records = new List<Record>();
            foreach (var source in sources)
            {
                var monthCopy = month;
                var dataSource = _db.Layers.Where(x =>
                        x.Type == LayerType.Processed &&
                        !x.IsDeleted && !x.IsCancelled &&
                        x.Name != null && x.Name.Contains($"{year}/{monthCopy:D2}-{source.Desc1}-T3")
                    ).Include(x => x.Records)
                    .AsNoTracking()
                    .FirstOrDefault();

                if (dataSource == null)
                {
                    throw new Exception($"Source layer {year}/{monthCopy}-{source.Desc1}-T3 not found.");
                }

                var codesRecord = processWorker.Records?.Where(x => x.Code == $"Codes-{source.Desc1}").FirstOrDefault();
                if (codesRecord != null)
                {
                    var codes = ProcessHelper.ParseCodes(codesRecord.Desc1!);
                    records.AddRange(dataSource.Records!.Where(x => codes.Contains(int.Parse(x.Code!))));
                }
                else
                {
                    records.AddRange(dataSource.Records!);
                }
            }

            if (dynamicCodes != null)
            {
                foreach (var dynamicCode in dynamicCodes)
                {
                    try
                    {
                        if (dynamicCode.Desc1 == null)
                        {
                            _logger.LogWarning("T1R1: Formula in Record {RecordId} is missing. Process: {ProcessName} ({ProcessId})",
                                dynamicCode.Id, processWorker.Name, processWorker.Id);
                            continue;
                        }

                        var calc = new BaseCalc(dynamicCode.Desc1);
                        if (!calc.IsFormulaCorrect())
                        {
                            _logger.LogWarning("T1R1: Formula {Expression} in Record {RecordId} is not correct. Process: {ProcessName} ({ProcessId})",
                                calc.Expression, dynamicCode.Id, processWorker.Name, processWorker.Id);
                            continue;
                        }

                        try
                        {
                            records.Add(calc.CalculateT1(records));
                        }
                        catch (Exception e)
                        {
                            _logger.LogWarning(e, "T1R1: Formula {Expression} in Record {RecordId} calculation error. Process: {ProcessName} ({ProcessId})",
                                calc.Expression, dynamicCode.Id, processWorker.Name, processWorker.Id);
                        }
                    }
                    catch (Exception e)
                    {
                        _logger.LogWarning(e, "T1R1: Calculation error for DynamicCode {RecordId}. Process: {ProcessName} ({ProcessId})",
                            dynamicCode.Id, processWorker.Name, processWorker.Id);
                    }
                }
            }

            newRecords.AddRange(records.Select(x => new Record
            {
                Id = Guid.NewGuid(),
                Code = $"{x.Code}{month:D2}",
                CreatedAt = DateTime.UtcNow,
                ModifiedAt = DateTime.UtcNow,
                Value1 = x.Value32
            }
            ));
        }

        if (isNew)
        {
            _db.Layers.Add(processedLayer);
        }
        else
        {
            _db.Layers.Update(processedLayer);
        }
        SaveRecords(processedLayer.Id, newRecords);
        _db.SaveChanges();

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

        UpdateReport(processedLayer.Id, sheetName);
    }

    private void SaveRecords(Guid layerId, ICollection<Record> records)
    {
        var toDelete = _db.Records.Where(x => x.LayerId == layerId).ToList();
        if (toDelete.Count > 0)
        {
            _db.Records.RemoveRange(toDelete);
        }

        foreach (var record in records)
        {
            record.CreatedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
            record.CreatedAt = DateTime.UtcNow;
            record.ModifiedById = Guid.Parse("F392209E-123E-4651-A5A4-0B1D6CF9FF9D");
            record.ModifiedAt = DateTime.UtcNow;
            record.LayerId = layerId;
            _db.Records.Add(record);
        }

        _logger.LogDebug("T3MultiSourceSummary: Saved {RecordCount} records for layer {LayerId}", records.Count, layerId);
    }

    private void UpdateReport(Guid sourceId, string sheetName)
    {
        const string sheetId = "1pph-XowjlK5CIaCEV_A5buK4ceJ0Z0YoUlDI4VMkhhA";
        var request = _googleSheetValues.Get(sheetId, $"{sheetName}!C4:DC4");
        var response = request.Execute();

        var r1 = _db.Layers
            .Where(x => x.Id == sourceId)
            .Include(x => x.Records)
            .AsNoTracking()
            .FirstOrDefault();

        var codesRow = response.Values[0];

        var valueRange = new ValueRange
        {
            Values = new List<IList<object>>()
        };

        for (var i = 1; i <= 12; i++)
        {
            var values = new List<object>();
            foreach (string code in codesRow)
            {
                var record = r1!.Records?.SingleOrDefault(x => x.Code == $"{code}{i:D2}");
                if (record != null)
                {
                    values.Add(record.Value1!.Value);
                }
                else
                {
                    values.Add("0");
                }
            }
            valueRange.Values.Add(values);
        }

        // sum 
        var valuesSum = new List<object>();
        var emptyRow = new List<object>();
        foreach (string code in codesRow)
        {
            var record = r1!.Records?.SingleOrDefault(x => x.Code == $"{code}13");
            emptyRow.Add("");
            if (record != null)
            {
                valuesSum.Add(record.Value1!.Value);
            }
            else
            {
                valuesSum.Add("0");
            }
        }

        valueRange.Values.Add(emptyRow);
        valueRange.Values.Add(valuesSum);

        var update = _googleSheetValues.Update(valueRange, sheetId, $"{sheetName}!C7:DC20");
        update.ValueInputOption =
            SpreadsheetsResource.ValuesResource.UpdateRequest.ValueInputOptionEnum.USERENTERED;
        update.Execute();

        // update time 
        var timeUtc = new List<object>
        {
            r1!.ModifiedAt.ToString("dd.MM.yyyy HH:mm:ss", CultureInfo.GetCultureInfo("pl-PL"))
        };
        var warsawTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time");
        var warsawTime = TimeZoneInfo.ConvertTimeFromUtc(r1.ModifiedAt.ToUniversalTime(), warsawTimeZone);
        var timeWarsaw = new List<object>
        {
            warsawTime.ToString("dd.MM.yyyy HH:mm:ss", CultureInfo.GetCultureInfo("pl-PL"))
        };
        var valueRangeTime = new ValueRange
        {
            Values = new List<IList<object>>()
        };
        valueRangeTime.Values.Add(timeUtc);
        valueRangeTime.Values.Add(timeWarsaw);

        var updateTimeUtc = _googleSheetValues.Update(valueRangeTime, sheetId, $"{sheetName}!G1:G2");
        updateTimeUtc.ValueInputOption =
            SpreadsheetsResource.ValuesResource.UpdateRequest.ValueInputOptionEnum.USERENTERED;
        updateTimeUtc.Execute();
    }
}