using eSPJ.Models;

namespace eSPJ.Services
{
    public class DetailPenjemputanJGCService
    {
        private readonly IDetailPenjemputanStore _store;
        private readonly IWebHostEnvironment _env;
        private readonly ILogger<DetailPenjemputanJGCService> _logger;

        public DetailPenjemputanJGCService(
            IWebHostEnvironment env,
            IDetailPenjemputanStore store,
            ILogger<DetailPenjemputanJGCService> logger)
        {
            _env = env;
            _store = store;
            _logger = logger;
        }

        private static string SanitizePathSegment(string? value, string fallback = "jgc")
        {
            var safe = string.Concat((value ?? string.Empty).Trim().Select(c =>
                char.IsLetterOrDigit(c) || c == '-' || c == '_'
                    ? c
                    : '-'));

            while (safe.Contains("--"))
            {
                safe = safe.Replace("--", "-");
            }

            safe = safe.Trim('-');
            return string.IsNullOrWhiteSpace(safe) ? fallback : safe;
        }

        public async Task<DetailPenjemputanResponse> SubmitPenjemputanAsync(DetailPenjemputanRequest request)
        {
            try
            {
                if (string.IsNullOrEmpty(request.TpsName))
                {
                    return new DetailPenjemputanResponse
                    {
                        Success = false,
                        Message = "Nama TPS harus diisi"
                    };
                }

                if (string.IsNullOrEmpty(request.NamaPetugas))
                {
                    return new DetailPenjemputanResponse
                    {
                        Success = false,
                        Message = "Nama petugas harus diisi"
                    };
                }

                var existingRecord = await GetRecordDetailAsync(request.NomorSpj, request.SpjDetailId, request.LokasiAngkutId, request.TpsName);

                var now = DateTime.Now;
                var datePart = now.ToString("yyyy-MM-dd");
                var spjFolder = SanitizePathSegment(request.NomorSpj, "spj-jgc");
                var tpsFolder = SanitizePathSegment(request.TpsName, "tps-jgc");
                var uploadPath = Path.Combine(_env.ContentRootPath, "uploads", "penjemputan", datePart, spjFolder, tpsFolder);
                var uploadBaseUrl = $"/uploads/penjemputan/{datePart}/{spjFolder}/{tpsFolder}";
                if (!Directory.Exists(uploadPath))
                {
                    Directory.CreateDirectory(uploadPath);
                }

                var tpsData = existingRecord != null
                    ? CloneRecord(existingRecord)
                    : new TpsData();

                tpsData.NomorSpj = request.NomorSpj;
                tpsData.LokasiAngkutId = request.LokasiAngkutId;
                tpsData.SpjDetailId = request.SpjDetailId;
                tpsData.Name = request.TpsName;
                tpsData.Latitude = request.Latitude;
                tpsData.Longitude = request.Longitude;
                tpsData.AlamatJalan = request.AlamatJalan;
                tpsData.WaktuKedatangan = request.WaktuKedatangan;
                tpsData.NamaPetugas = request.NamaPetugas;
                tpsData.IsSubmit = true;
                tpsData.SubmittedAt ??= DateTime.Now;
                tpsData.UpdatedAt = DateTime.Now;

                if (request.FotoKedatangan != null && request.FotoKedatangan.Any())
                {
                    tpsData.FotoKedatangan = new List<string>();
                    foreach (var file in request.FotoKedatangan)
                    {
                        var fileName = $"kedatangan_{Guid.NewGuid()}{Path.GetExtension(file.FileName)}";
                        var filePath = Path.Combine(uploadPath, fileName);
                        using (var stream = new FileStream(filePath, FileMode.Create))
                        {
                            await file.CopyToAsync(stream);
                        }
                        tpsData.FotoKedatangan.Add($"{uploadBaseUrl}/{fileName}");
                    }
                    tpsData.FotoKedatanganUploaded = tpsData.FotoKedatangan.Count > 0;
                }
                else if (existingRecord?.FotoKedatangan?.Any() == true)
                {
                    tpsData.FotoKedatangan = new List<string>(existingRecord.FotoKedatangan);
                    tpsData.FotoKedatanganUploaded = existingRecord.FotoKedatanganUploaded || tpsData.FotoKedatangan.Count > 0;
                }
                else
                {
                    return new DetailPenjemputanResponse
                    {
                        Success = false,
                        Message = "Foto kedatangan harus diupload"
                    };
                }

                if (request.FotoPetugas != null && request.FotoPetugas.Any())
                {
                    tpsData.FotoPetugas = new List<string>();
                    foreach (var file in request.FotoPetugas)
                    {
                        var fileName = $"petugas_{Guid.NewGuid()}{Path.GetExtension(file.FileName)}";
                        var filePath = Path.Combine(uploadPath, fileName);
                        using (var stream = new FileStream(filePath, FileMode.Create))
                        {
                            await file.CopyToAsync(stream);
                        }
                        tpsData.FotoPetugas.Add($"{uploadBaseUrl}/{fileName}");
                    }
                    tpsData.FotoPetugasUploaded = tpsData.FotoPetugas.Count > 0;
                }
                else if (existingRecord?.FotoPetugas?.Any() == true)
                {
                    tpsData.FotoPetugas = new List<string>(existingRecord.FotoPetugas);
                    tpsData.FotoPetugasUploaded = existingRecord.FotoPetugasUploaded || tpsData.FotoPetugas.Count > 0;
                }
                else
                {
                    return new DetailPenjemputanResponse
                    {
                        Success = false,
                        Message = "Foto petugas harus diupload"
                    };
                }

                await _store.SaveSubmittedAsync(tpsData);

                return new DetailPenjemputanResponse
                {
                    Success = true,
                    Message = "Data penjemputan berhasil disimpan",
                    Data = tpsData
                };
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error submitting penjemputan data");
                return new DetailPenjemputanResponse
                {
                    Success = false,
                    Message = $"Terjadi kesalahan: {ex.Message}"
                };
            }
        }

        public async Task<TpsData?> GetRecordDetailAsync(string nomorSpj, string? spjDetailId = null, string? lokasiAngkutId = null, string? namaTps = null)
        {
            var normalizedNomorSpj = (nomorSpj ?? string.Empty).Trim();
            var normalizedSpjDetailId = (spjDetailId ?? string.Empty).Trim();
            var normalizedLokasiAngkutId = (lokasiAngkutId ?? string.Empty).Trim();
            var normalizedNamaTps = (namaTps ?? string.Empty).Trim();

            var allData = await _store.GetByNomorSpjAsync(normalizedNomorSpj);
            return allData
                .OrderByDescending(item => item.UpdatedAt)
                .FirstOrDefault(item =>
                    (string.IsNullOrWhiteSpace(normalizedSpjDetailId) || string.Equals((item.SpjDetailId ?? string.Empty).Trim(), normalizedSpjDetailId, StringComparison.OrdinalIgnoreCase)) &&
                    (string.IsNullOrWhiteSpace(normalizedLokasiAngkutId) || string.Equals((item.LokasiAngkutId ?? string.Empty).Trim(), normalizedLokasiAngkutId, StringComparison.OrdinalIgnoreCase)) &&
                    (string.IsNullOrWhiteSpace(normalizedNamaTps) || string.Equals((item.Name ?? string.Empty).Trim(), normalizedNamaTps, StringComparison.OrdinalIgnoreCase)));
        }

        public async Task<RecordSaveResponse> SaveRecordJGCAsync(RecordSaveRequest request)
        {
            try
            {
                await _store.SaveRecordAsync(request);
                return new RecordSaveResponse { Success = true, Message = "Data tersimpan." };
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error saving JGC penjemputan record");
                return new RecordSaveResponse { Success = false, Message = $"Gagal menyimpan data: {ex.Message}" };
            }
        }

        private static TpsData CloneRecord(TpsData source)
        {
            return new TpsData
            {
                NomorSpj = source.NomorSpj,
                LokasiAngkutId = source.LokasiAngkutId,
                SpjDetailId = source.SpjDetailId,
                Name = source.Name,
                Index = source.Index,
                Latitude = source.Latitude,
                Longitude = source.Longitude,
                AlamatJalan = source.AlamatJalan,
                WaktuKedatangan = source.WaktuKedatangan,
                FotoKedatangan = new List<string>(source.FotoKedatangan ?? new List<string>()),
                FotoKedatanganUploaded = source.FotoKedatanganUploaded,
                FotoPetugas = new List<string>(source.FotoPetugas ?? new List<string>()),
                FotoPetugasUploaded = source.FotoPetugasUploaded,
                NamaPetugas = source.NamaPetugas,
                IsSubmit = source.IsSubmit,
                UpdatedAt = source.UpdatedAt,
                SubmittedAt = source.SubmittedAt,
            };
        }
    }
}