using GemBox.Spreadsheet;
using BlackRockReportFunction.Models;


namespace BlackRockReportFunction.Bussines
{
    internal class ReportGenerator
    {
        public const string DefaultFontName = "DejaVu Sans";
        public const int DefaultFontSize = 20;

        public static ExcelFile GenerateReportContent(Root reportObject)
        {
            string licenseKey = Environment.GetEnvironmentVariable("GemBoxLicenseKey");
            SpreadsheetInfo.SetLicense(licenseKey);

            var excelFile = new ExcelFile();

            var ws = excelFile.Worksheets.Add("Content");

            var sectionStyle = new CellStyle
            {
                Font =
                {
                    Name = DefaultFontName,
                    Weight = ExcelFont.BoldWeight,
                    Size = DefaultFontSize * 12,
                },
                VerticalAlignment = VerticalAlignmentStyle.Center,
                HorizontalAlignment = HorizontalAlignmentStyle.Left,
            };

            var mainDetailsStyle = new CellStyle
            {
                Font =
                {
                    Name = DefaultFontName,
                    Weight = ExcelFont.BoldWeight,
                    Size = DefaultFontSize * 11,
                },
                VerticalAlignment = VerticalAlignmentStyle.Center,
            };

            var normalDetailsStyle = new CellStyle
            {
                Font =
                {
                    Name = DefaultFontName,
                    Weight = ExcelFont.NormalWeight,
                    Size = DefaultFontSize * 11,
                },
                VerticalAlignment = VerticalAlignmentStyle.Center,
            };

            AddReportItems(reportObject, ws, sectionStyle, mainDetailsStyle, normalDetailsStyle);

            // Autofit
            AutoFitReport(excelFile);

            return excelFile;
        }

        public static void AddReportItems(Root reportObject, ExcelWorksheet ws, CellStyle sectionStyle, CellStyle mainDetailsStyle, CellStyle normalDetailsStyle)
        {

            TimeSpan t, time,time1;
            int row = 0;
            string[] sectionNames = { "User     ", "Description     ", "Time (h)     ", "Time (decimal)     "};
            decimal totalAmountSum = 0;
            List<string> usersDecimalHours = new List<string>();

            for (int i = 0; i < sectionNames.Length; i++)
            {
                ws.Cells[row, i].Style = sectionStyle;
                ws.Cells[row, i].Value = sectionNames[i];
                ws.Cells[row, i].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                ws.Cells[row, i].Style.Borders[IndividualBorder.Bottom].LineStyle = LineStyle.Thick;
                ws.Cells[row, i].Style.Borders[IndividualBorder.Bottom].LineColor = System.Drawing.Color.LightGray;
            }

            row++;

            foreach (var reportPerson in reportObject.groupOne)
            {
                ws.Cells[row, 0].Style = mainDetailsStyle;
                ws.Cells[row, 0].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                ws.Cells[row, 0].Value = reportPerson.name;

                ws.Cells[row, 1].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;

                time = TimeSpan.FromSeconds(reportPerson.duration);
                var sumOfRecordHours = string.Format("{0:00}:{1:D2}:{2:D2}", Math.Floor(time.TotalHours), time.Minutes, time.Seconds); 
                ws.Cells[row, 2].Style = mainDetailsStyle;
                ws.Cells[row, 2].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                ws.Cells[row, 2].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                ws.Cells[row, 2].Value = sumOfRecordHours;

                ws.Cells[row, 3].Style = mainDetailsStyle;
                ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                ws.Cells[row, 3].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                var userDecimalHours = Convert.ToDecimal(TimeSpan.FromSeconds(reportPerson.duration).TotalHours).ToString("0.00"); ; 
                ws.Cells[row, 3].Value = userDecimalHours;
                usersDecimalHours.Add(userDecimalHours);


                row++;

                foreach (var personRecord in reportPerson.children)
                {
                    ws.Cells[row, 0].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;

                    ws.Cells[row, 1].Style = normalDetailsStyle;
                    ws.Cells[row, 1].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                    ws.Cells[row, 1].Value = personRecord.name;

                    ws.Cells[row, 2].Style = normalDetailsStyle;
                    ws.Cells[row, 2].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                    ws.Cells[row, 2].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                    t = TimeSpan.FromSeconds(personRecord.duration);
                    ws.Cells[row, 2].Value = string.Format("{0:00}:{1:D2}:{2:D2}", Math.Floor(t.TotalHours), t.Minutes,t.Seconds) ; 

                    ws.Cells[row, 3].Style = normalDetailsStyle;
                    ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                    ws.Cells[row, 3].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                    ws.Cells[row, 3].Value = Convert.ToDecimal(TimeSpan.FromSeconds(personRecord.duration).TotalHours).ToString("0.00"); 

                    

                    row++;
                }
            }

            

            var totalSum = reportObject.totals.Select(total => total.totalTime).FirstOrDefault();
           
            ws.Cells[row, 0].Style = mainDetailsStyle;
            ws.Cells[row, 0].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
            ws.Cells[row, 0].Value = "Total";

            ws.Cells[row, 2].Style = mainDetailsStyle;
            ws.Cells[row, 2].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
            ws.Cells[row, 2].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
            time1= t = TimeSpan.FromSeconds(totalSum);
            ws.Cells[row, 2].Value = string.Format("{0:00}:{1:D2}:{2:D2}", Math.Floor(time1.TotalHours), time1.Minutes, time1.Seconds);

            ws.Cells[row, 3].Style = mainDetailsStyle;
            ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
            ws.Cells[row, 3].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
            ws.Cells[row, 3].Value = Convert.ToDecimal(TimeSpan.FromSeconds(totalSum).TotalHours).ToString("0.00"); ; 

            
        }

        public static void AutoFitReport(ExcelFile excelFile)
        {
            foreach (var sheet in excelFile.Worksheets)
            {
                var columnCount = sheet.CalculateMaxUsedColumns();

                for (int i = 0; i < columnCount; i++)
                {
                    sheet.Columns[i].AutoFit(1, sheet.Rows[0], sheet.Rows[sheet.Rows.Count - 1]);
                }
            }
        }
    }
}