using System.Globalization;
using DiunaBIWebAPI.dataImporters;
using Google.Apis.Sheets.v4;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using WebAPI.dataProcessors;
using WebAPI.Exports;
using WebAPI.Models;

namespace WebAPI.Controllers
{
    [ApiController]
    [Route("api/[controller]")]

    public class LayersController : Controller
    {
        private readonly AppDbContext db;
        private SpreadsheetsResource.ValuesResource? googleSheetValues;
        private GoogleDriveHelper googleDriveHelper;
        private GoogleSheetsHelper googleSheetsHelper;
        private readonly IConfiguration configuration;
        private readonly LogsController logsController;
        public LayersController(
            AppDbContext _db,
            GoogleSheetsHelper _googleSheetsHelper,
            GoogleDriveHelper _googleDriveHelper,
            IConfiguration _configuration)
        {
            db = _db;
            if (_googleSheetsHelper.Service is not null)
            {
                googleSheetValues = _googleSheetsHelper.Service.Spreadsheets.Values;
            }
            googleSheetsHelper = _googleSheetsHelper;
            googleDriveHelper = _googleDriveHelper;
            configuration = _configuration;
            logsController = new LogsController(googleSheetsHelper, googleDriveHelper, configuration);
        }

        [HttpGet]
        public IActionResult GetAll(int start, int limit, string? name, LayerType? type)
        {
            try
            {
                IQueryable<Layer> response = db.Layers.Where(x => !x.IsDeleted);
                if (name != null)
                {
                    response = response.Where(x => x.Name != null && x.Name.Contains(name));
                }
                if (type != null)
                {
                    response = response.Where(x => x.Type == type);
                }

                return Ok(response
                    .OrderByDescending(x => x.Number)
                    .Skip(start).Take(limit).ToList());

            }
            catch (Exception e)
            {
                return BadRequest(e.ToString());
            }
        }
        [HttpPost]
        public IActionResult Save(Layer input)
        {
            try
            {
                //Request.Headers.TryGetValue("userId", out var value);
                //Guid currentUserId = new Guid(value!);


                return Ok();
            }
            catch (Exception e)
            {
                return BadRequest(e.ToString());
            }
        }
        [HttpGet]
        [Route("{id}")]
        public IActionResult Get(Guid id)
        {
            try
            {
                return Ok(db.Layers
                    .Include(x => x.CreatedBy)
                    .Include(x => x.Records)
                    .Where(x => x.Id == id && !x.IsDeleted).First());
            }
            catch (Exception e)
            {
                return BadRequest(e.ToString());
            }
        }
        [HttpGet]
        [Route("getByNumber/{apiKey}/{number}")]
        public IActionResult GetByNumber(string apiKey, int number)
        {
            if (apiKey != configuration["apiKey"])
            {
                return Unauthorized();
            }
            try
            {
                return Ok(db.Layers
                    .Include(x => x.CreatedBy)
                    .Include(x => x.Records)
                    .Where(x => x.Number == number && !x.IsDeleted).First());
            }
            catch (Exception e)
            {
                return BadRequest(e.ToString());
            }
        }
        [HttpGet]
        [Route("exportToGoogleSheet/{id}")]
        public IActionResult ExportToGoogleSheet(Guid id)
        {
            if (googleSheetValues is null)
            {
                throw new Exception("Google Sheets API not initialized");
            }
            Layer layer = db.Layers
                    .Include(x => x.Records!.OrderByDescending(x => x.Code))
                    .Where(x => x.Id == id && !x.IsDeleted).First();

            var export = new googleSheetExport(googleDriveHelper, googleSheetValues, configuration);
            export.export(layer);
            return Ok(true);
        }

        [HttpGet]
        [Route("AutoImport/{apiKey}")]
        [AllowAnonymous]
        public IActionResult AutoImport(string apiKey)
        {
            if (Request.Host.Value != configuration["apiLocalUrl"] || apiKey != configuration["apiKey"])
            {
                return Unauthorized();
            }
            if (googleSheetValues is null)
            {
                throw new Exception("Google Sheets API not initialized");
            }
            try
            {
                List<Layer> importWorkerLayers;
                importWorkerLayers = db.Layers
                    .Include(x => x.Records)
                    .Where(x =>
                        x.Records!.Any(x => x.Code == "Type" && x.Desc1 == "ImportWorker") &&
                        x.Records!.Any(x => x.Code == "IsEnabled" && x.Desc1 == "True")
                        )
                    .OrderBy(x => x.CreatedAt)
                    .ToList();

                if (importWorkerLayers.Count() == 0)
                {
                    logsController.AddEntry(new LogEntry
                    {
                        Title = "No Layers to import.",
                        Type = LogEntryType.info,
                        LogType = LogType.import,
                        CreatedAt = DateTime.UtcNow,
                    });
                    return Ok();
                }

                foreach (Layer importWorker in importWorkerLayers)
                {
                    try
                    {
                        string? type = importWorker.Records!.FirstOrDefault(x => x.Code == "ImportType")?.Desc1;
                        if (type == null)
                        {
                            type = "Standard";
                        }

                        if (type == "FK2")
                        {
                            MorskaFk2Importer importer = new MorskaFk2Importer(db, googleSheetValues, this);
                            importer.import(importWorker);
                            
                            logsController.AddEntry(new LogEntry
                            {
                                Title = $"{importWorker!.Name}, {importWorker.Id}",
                                Type = LogEntryType.info,
                                LogType = LogType.import,
                                Message = "Success",
                                CreatedAt = DateTime.UtcNow
                            });
                            return Ok();
                        }
                        
                        string? startDate = importWorker.Records!.FirstOrDefault(x => x.Code == "StartDate")?.Desc1;
                        if (startDate == null)
                        {
                            throw new Exception("StartDate record nod found");
                        }
                        string? endDate = importWorker.Records!.Where(x => x.Code == "EndDate").First().Desc1;
                        if (endDate == null)
                        {
                            throw new Exception("EndDate record nod found");
                        }
                        var startDateParsed = DateTime.ParseExact(startDate!, "yyyy.MM.dd", null);
                        var endDateParsed = DateTime.ParseExact(endDate!, "yyyy.MM.dd", null);
                        if (startDateParsed.Date <= DateTime.UtcNow.Date && endDateParsed.Date >= DateTime.UtcNow.Date)
                        {
                            MorskaImporter importer = new MorskaImporter(db, googleSheetValues, this);
                            importer.import(importWorker);
                            Thread.Sleep(5000); // be aware of GSheet API quota

                            logsController.AddEntry(new LogEntry
                            {
                                Title = $"{importWorker!.Name}, {importWorker.Id}",
                                Type = LogEntryType.info,
                                LogType = LogType.import,
                                Message = "Success",
                                CreatedAt = DateTime.UtcNow
                            });
                        }
                        else if (IsImportedLayerUpToDate(importWorker) == false)
                        {
                            MorskaImporter importer = new MorskaImporter(db, googleSheetValues, this);
                            importer.import(importWorker);
                            Thread.Sleep(5000); // be aware of GSheet API quota
                            
                            logsController.AddEntry(new LogEntry
                            {
                                Title = $"{importWorker!.Name}, {importWorker.Id}",
                                Type = LogEntryType.warning,
                                LogType = LogType.import,
                                Message = "Success (reimported)",
                                CreatedAt = DateTime.UtcNow
                            });
                        }
                        else
                        {
                            logsController.AddEntry(new LogEntry
                            {
                                Title = $"{importWorker!.Name}, {importWorker.Id}",
                                Type = LogEntryType.warning,
                                LogType = LogType.import,
                                Message = "importLayer records are up of date. Not processed.",
                                CreatedAt = DateTime.UtcNow
                            });
                        }
                    }
                    catch (Exception e)
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = $"{importWorker!.Name}, {importWorker.Id}",
                            Type = LogEntryType.error,
                            LogType = LogType.import,
                            Message = e.ToString(),
                            CreatedAt = DateTime.UtcNow
                        });
                    }
                }
                return Ok();
            }
            catch (Exception e)
            {
                logsController.AddEntry(new LogEntry
                {
                    Title = "Process error",
                    Type = LogEntryType.error,
                    LogType = LogType.import,
                    Message = e.ToString(),
                    CreatedAt = DateTime.UtcNow
                });
                return BadRequest(e.ToString());
            }
        }
        [HttpGet]
        [Route("AutoProcess/{apiKey}")]
        [AllowAnonymous]
        public IActionResult AutoProcess(string apiKey)
        {
            if (Request.Host.Value != configuration["apiLocalUrl"] || apiKey != configuration["apiKey"])
            {
                return Unauthorized();
            }
            if (googleSheetValues is null)
            {
                throw new Exception("Google Sheets API not initialized");
            }

            string[] processTypes = new string[] {
                "T3-SingleSource", 
                "T3-SourceYearSummary",
                "T3-MultiSourceSummary", // AA
                "T3-MultiSourceYearSummary", // AA/13
                "T3-R1"
                };

            foreach (string type in processTypes)
            {
                try
                {
                    logsController.AddEntry(new LogEntry
                    {
                        Title = $"Processing: {type}",
                        Type = LogEntryType.info,
                        LogType = LogType.process,
                        CreatedAt = DateTime.UtcNow,
                    });

                    List<Layer> processWorkerLayers = db.Layers
                        .Include(x => x.Records)
                        .Where(x =>
                            x.Records!.Any(x => x.Code == "Type" && x.Desc1 == "ProcessWorker") &&
                            x.Records!.Any(x => x.Code == "IsEnabled" && x.Desc1 == "True") &&
                            x.Records!.Any(x => x.Code == "ProcessType" && x.Desc1 == type)
                            )
                        .OrderBy(x => x.CreatedAt)
                        .ToList();

                    if (processWorkerLayers.Count() == 0)
                    {
                        logsController.AddEntry(new LogEntry
                        {
                            Title = "No Layers to process.",
                            Type = LogEntryType.info,
                            LogType = LogType.process,
                            CreatedAt = DateTime.UtcNow,
                        });
                    }

                    foreach (Layer processWorker in processWorkerLayers)
                    {
                        try
                        {
                            ProcessLayer(processWorker);
                        }
                        catch (Exception e)
                        {
                            logsController.AddEntry(new LogEntry
                            {
                                Title = $"{processWorker!.Name}, {processWorker.Id}",
                                Type = LogEntryType.error,
                                LogType = LogType.process,
                                Message = e.ToString(),
                                CreatedAt = DateTime.UtcNow
                            });
                        }
                    }
                }
                catch (Exception e)
                {
                    logsController.AddEntry(new LogEntry
                    {
                        Title = "Process error",
                        Type = LogEntryType.error,
                        LogType = LogType.process,
                        Message = e.ToString(),
                        CreatedAt = DateTime.UtcNow
                    });
                }
            }
            return Ok();
        }
        internal void ProcessLayer(Layer processWorker)
        {
            if (googleSheetValues == null)
            {
                throw new Exception("Google Sheets API not initialized");
            }
            string? name = processWorker.Name;
            string? year = processWorker?.Records?.SingleOrDefault(x => x.Code == "Year")?.Desc1;
            if (year == null)
            {
                throw new Exception("Year record nod found");
            }

            string? processType = processWorker?.Records?.SingleOrDefault(x => x.Code == "ProcessType")?.Desc1;
            if (processType == null)
            {
                throw new Exception("ProcessType record not found");
            }
            if (processType == "T3-SourceYearSummary")
            {
                T3SourceYearSummaryProcessor processor = new T3SourceYearSummaryProcessor(db, googleSheetValues, this);
                processor.process(processWorker!);

                logsController.AddEntry(new LogEntry
                {
                    Title = $"{processWorker!.Name}, {processWorker.Id}",
                    Type = LogEntryType.info,
                    LogType = LogType.process,
                    Message = "Success",
                    CreatedAt = DateTime.UtcNow
                });
                return;
            }
            if (processType == "T3-MultiSourceYearSummary")
            {
                T3MultiSourceYearSummaryProcessor processor = new T3MultiSourceYearSummaryProcessor(db, googleSheetValues, this, logsController);
                processor.process(processWorker!);

                logsController.AddEntry(new LogEntry
                {
                    Title = $"{processWorker!.Name}, {processWorker.Id}",
                    Type = LogEntryType.info,
                    LogType = LogType.process,
                    Message = "Success",
                    CreatedAt = DateTime.UtcNow
                });
                return;
            }
            if (processType == "T3-MultiSourceCopySelectedCodesYearSummary")
            {
                T3MultiSourceCopySelectedCodesYearSummaryProcessor processor = new T3MultiSourceCopySelectedCodesYearSummaryProcessor(db, googleSheetValues, this);
                processor.process(processWorker!);

                logsController.AddEntry(new LogEntry
                {
                    Title = $"{processWorker!.Name}, {processWorker.Id}",
                    Type = LogEntryType.info,
                    LogType = LogType.process,
                    Message = "Success",
                    CreatedAt = DateTime.UtcNow
                });
                return;
            }
            if (processType == "T3-R1")
            {
                T3R1Processor processor = new T3R1Processor(db, googleSheetValues, this, logsController);
                processor.process(processWorker!);

                logsController.AddEntry(new LogEntry
                {
                    Title = $"{processWorker!.Name}, {processWorker.Id}",
                    Type = LogEntryType.info,
                    LogType = LogType.process,
                    Message = "Success",
                    CreatedAt = DateTime.UtcNow
                });
                return;
            }
            string? month = processWorker?.Records?.SingleOrDefault(x => x.Code == "Month")?.Desc1;
            if (month == null)
            {
                throw new Exception("Month record not found");
            }
            switch (processType!)
            {
                case "T3-SingleSource":
                    {
                        T3SingleSourceProcessor processor = new T3SingleSourceProcessor(db, googleSheetValues, this);
                        processor.process(processWorker!);
                        break;
                    }
                case "T3-MultiSourceSummary":
                    {
                        T3MultiSourceSummaryProcessor processor = new T3MultiSourceSummaryProcessor(db, googleSheetValues, this, logsController);
                        processor.process(processWorker!);
                        break;
                    }
                case "T3-MultiSourceCopySelectedCodes":
                    {
                        T3MultiSourceCopySelectedCodesProcessor processor = new T3MultiSourceCopySelectedCodesProcessor(db, googleSheetValues, this);
                        processor.process(processWorker!);
                        break;
                    }
            }
            logsController.AddEntry(new LogEntry
            {
                Title = $"{processWorker!.Name}, {processWorker.Id}",
                Type = LogEntryType.info,
                LogType = LogType.process,
                Message = "Success",
                CreatedAt = DateTime.UtcNow
            });
        }
        internal void SaveRecords(Guid id, ICollection<Record> records, Guid currentUserId)
        {
            try
            {
                List<Record> toDelete = db.Records.Where(x => x.LayerId == id).ToList();
                if (toDelete.Count > 0)
                {
                    db.Records.RemoveRange(toDelete);
                }
                foreach (Record record in records)
                {
                    record.CreatedById = currentUserId;
                    record.CreatedAt = DateTime.UtcNow;
                    record.ModifiedById = currentUserId;
                    record.ModifiedAt = DateTime.UtcNow;
                    record.LayerId = id;
                    db.Records.Add(record);
                }
            }
            catch (Exception)
            {
                throw;
            }
        }
        internal void WriteToConsole(params string[] messages)
        {
            foreach (string message in messages)
            {
                Console.WriteLine($"DiunaLog: {message}");
            }
        }
        private bool IsImportedLayerUpToDate(Layer importWorker)
        {
            if (googleSheetValues is null)
            {
                throw new Exception("Google Sheets API not initialized");
            }

            Layer? newestLayer = db.Layers
                .Include(x => x.Records)
                .Where(x => x.ParentId == importWorker.Id)
                .OrderByDescending(x => x.CreatedAt)
                .FirstOrDefault();

            if (newestLayer is null)
            {
                return true; // importWorker is not active yet, no check needed
            }

            string? sheetId = importWorker.Records!.Where(x => x.Code == "SheetId").FirstOrDefault()?.Desc1;
            if (sheetId == null)
            {
                throw new Exception($"SheetId not found, {importWorker.Name}");
            }
            string? sheetTabName = importWorker.Records!.Where(x => x.Code == "SheetTabName").FirstOrDefault()?.Desc1;
            if (sheetTabName == null)
            {
                throw new Exception($"SheetTabName not found, {importWorker.Name}");
            }
            string? dataRange = importWorker.Records!.Where(x => x.Code == "DataRange").FirstOrDefault()?.Desc1;
            if (dataRange == null)
            {
                throw new Exception($"DataRange not found, {importWorker.Name}");
            }
            var dataRangeResponse = googleSheetValues.Get(sheetId, $"{sheetTabName}!{dataRange}").Execute();
            var data = dataRangeResponse.Values;

            bool isUpToDate = true;

            for (int i = 0; i < data[1].Count; i++)
            {
                double value;
                if (data[0][i].ToString() != "")
                {
                    Record? record = newestLayer.Records!.Where(x => x.Code == data[0][i].ToString()).FirstOrDefault();
                    if (record == null)
                    {
                        WriteToConsole("Code not found in DiunaBI", data[0][i].ToString()!);
                        isUpToDate = false;
                        continue;
                    }
                    else if (
                        double.TryParse(data[1][i].ToString(), CultureInfo.GetCultureInfo("pl-PL"), out value) &&
                        record.Value1 != value)
                    {
                        WriteToConsole($"Code: {data[0][i]}. DiunaBI: {string.Format("{0:N2}", record.Value1)}. GoogleSheet: {data[1][i]}");
                        isUpToDate = false;
                    }
                }
            }
            foreach (Record record in newestLayer.Records!)
            {
                if (data[0].Contains(record.Code))
                {
                    continue;
                }
                WriteToConsole($"Code not found in GoogleSheet: {record.Code}");
                isUpToDate = false;
            }
            return isUpToDate;
        }
    }
}