using GemBox.Spreadsheet;
using BlackRockReportFunction.Models;
using BlackRockReportFunction.Helpers;

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

        public static ExcelFile GenerateReportContent(ClockifyReport 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 * 10,
                },
                VerticalAlignment = VerticalAlignmentStyle.Center,
            };

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

            // Autofit
            AutoFitReport(excelFile);

            return excelFile;
        }

        public static void AddReportItems(ClockifyReport reportObject, ExcelWorksheet ws, CellStyle sectionStyle, CellStyle mainDetailsStyle, CellStyle normalDetailsStyle)
        {
            int row = 0;
            string[] sectionNames = { "User     ", "Description     ", "Time (h)     ", "Time (decimal)     ", "Amount (USD)     " };
            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.reportPeople)
            {
                ws.Cells[row, 0].Style = mainDetailsStyle;
                ws.Cells[row, 0].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                ws.Cells[row, 0].Value = reportPerson.fullName;

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

                var sumOfRecordHours = Formaters.getSumOfRecordTimes(reportPerson.records.Select(record => record.recordTime).ToList());
                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 = Formaters.getDecimalHours(sumOfRecordHours);
                ws.Cells[row, 3].Value = userDecimalHours;
                usersDecimalHours.Add(userDecimalHours);

                ws.Cells[row, 4].Style = mainDetailsStyle;
                ws.Cells[row, 4].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                ws.Cells[row, 4].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                ws.Cells[row, 4].Value = string.Format("{0} USD", reportPerson.records.Sum(record => record.amount).ToString("0.00"));
                totalAmountSum += reportPerson.records.Sum(record => record.amount);

                row++;

                foreach (var personRecord in reportPerson.records)
                {
                    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.recordDescription;

                    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;
                    ws.Cells[row, 2].Value = Formaters.getRecordTime(personRecord.recordTime);

                    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 = Formaters.getDecimalHours(personRecord.recordTime);

                    ws.Cells[row, 4].Style = normalDetailsStyle;
                    ws.Cells[row, 4].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                    ws.Cells[row, 4].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
                    ws.Cells[row, 4].Value = string.Format("{0} USD", personRecord.amount.ToString("0.00"));

                    row++;
                }
            }

            ws.Cells.GetSubrangeAbsolute(row, 0, row, 1).Merged = true;
            ws.Cells.GetSubrangeAbsolute(row, 0, row, 1).Style = mainDetailsStyle;
            ws.Cells.GetSubrangeAbsolute(row, 0, row, 1).Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
            ws.Cells.GetSubrangeAbsolute(row, 0, row, 1).Value = reportObject.reportDescription;

            var totalSum = Formaters.getTotalSum(
                reportObject.reportPeople.Select(
                    person => Formaters.getSumOfRecordTimes(
                        person.records.Select(record => record.recordTime).ToList()
                    )
                ).ToList()
            );

            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 = totalSum;

            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 = Formaters.getTotalDecimalHours(usersDecimalHours);

            ws.Cells[row, 4].Style = mainDetailsStyle;
            ws.Cells[row, 4].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
            ws.Cells[row, 4].Style.Borders[IndividualBorder.Right].LineStyle = LineStyle.Thin;
            ws.Cells[row, 4].Value = string.Format("{0} USD", totalAmountSum.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]);
                }
            }
        }
    }
}