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

namespace BlackRockReportFunction.Bussines
{
    internal class ReportGenerator
    {
        public static async Task<ExcelFile> GenerateReportContent()
        {
            string licenseKey = Environment.GetEnvironmentVariable("GemBoxLicenseKey");
            SpreadsheetInfo.SetLicense(licenseKey);

            var testObject = new ClockifyReport
            {
                reportName = "BlackRockReport_20220615",
                reportDescription = "Total (13/06/2022 - 15/06/2022)",
                reportPeople = new List<Person>
                {
                    new Person
                    {
                        fullName = "Nikola Jovanovic",
                        records = new List<ClockifyRecord>
                        {
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 200
                            },
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 150
                            }
                        }
                    },
                    new Person
                    {
                        fullName = "Boris Stevanovic",
                        records = new List<ClockifyRecord>
                        {
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 300
                            },
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 100
                            },
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 120
                            }
                        }
                    },
                    new Person
                    {
                        fullName = "Dunja Stevanovic",
                        records = new List<ClockifyRecord>
                        {
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 50
                            },
                            new ClockifyRecord
                            {
                                recordDescription = "Description1",
                                recordTime = new TimeOnly(3,15,44),
                                amount = 500
                            }
                        }
                    }
                }
            };

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

            var sectionStyle = new CellStyle
            {
                Font =
                {
                    Weight = ExcelFont.BoldWeight,
                    Size = 250,
                },
                VerticalAlignment = VerticalAlignmentStyle.Center,
                HorizontalAlignment = HorizontalAlignmentStyle.Center,
            };

            var mainDetailsStyle = new CellStyle
            {
                Font =
                {
                    Weight = ExcelFont.BoldWeight,
                    Size = 200,
                }
            };

            await AddReportItems(testObject, ws, sectionStyle, mainDetailsStyle);

            // Autofit
            excelFile = await AutoFitReport(excelFile);

            return excelFile;
        }

        public static async Task AddReportItems(ClockifyReport reportObject, ExcelWorksheet ws, CellStyle sectionStyle, CellStyle mainDetailsStyle)
        {
            int row = 0;
            string[] sectionNames = { "User", "Description", "Time (h)", "Time (decimal)", "Amount (USD)" };
            decimal totalAmountSum = 0;

            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.Medium;
                ws.Cells[row, i].Style.Borders[IndividualBorder.Bottom].LineStyle = LineStyle.Thick;
            }

            row++;

            foreach (var reportPerson in reportObject.reportPeople)
            {
                ws.Cells[row, 0].Style = mainDetailsStyle;
                ws.Cells[row, 0].Value = reportPerson.fullName;

                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].Value = sumOfRecordHours;

                ws.Cells[row, 3].Style = mainDetailsStyle;
                ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                ws.Cells[row, 3].Value = Formaters.getDecimalHours(sumOfRecordHours);

                ws.Cells[row, 4].Style = mainDetailsStyle;
                ws.Cells[row, 4].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
                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, 1].Value = personRecord.recordDescription;

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

                    ws.Cells[row, 3].Value = Formaters.getDecimalHours(personRecord.recordTime);
                    ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;

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

                    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).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].Value = totalSum;

            ws.Cells[row, 3].Style = mainDetailsStyle;
            ws.Cells[row, 3].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
            ws.Cells[row, 3].Value = Formaters.getDecimalHours(totalSum);

            ws.Cells[row, 4].Style = mainDetailsStyle;
            ws.Cells[row, 4].Style.HorizontalAlignment = HorizontalAlignmentStyle.Right;
            ws.Cells[row, 4].Value = string.Format("{0} USD", totalAmountSum.ToString("0.00"));
        }

        public static async Task<ExcelFile> AutoFitReport(ExcelFile excelFile)
        {
            var localFile = excelFile;

            foreach (var sheet in localFile.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]);
                }
            }

            return localFile;
        }
    }
}