using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UniversityBusinessLogics.OfficePackage.HelperEnums;
using UniversityBusinessLogics.OfficePackage.HelperModels.Excel;
using UniversityContracts.ViewModels;

namespace UniversityBusinessLogics.OfficePackage
{
    public abstract class AbstractSaveToExcel
    {
        private void CreateHeaders(ExcelInfo info)
        {
            InsertCellInWorksheet(new ExcelCellParameters
            {
                ColumnName = "A",
                RowIndex = 1,
                Text = info.Title,
                StyleInfo = ExcelStyleInfoType.Title
            });

            MergeCells(new ExcelMergeParameters
            {
                CellFromName = "A1",
                CellToName = "G1"
            });

            for (var i = 0; i < info.Headers.Count; i++)
            {
                InsertCellInWorksheet(new ExcelCellParameters()
                {
                    ColumnName = ((char)('A' + i)).ToString(),
                    RowIndex = 2,
                    Text = info.Headers[i],
                    StyleInfo = ExcelStyleInfoType.Text
                });
            }
        }

        /// <summary>
        /// Создание отчета
        /// </summary>
        /// <param name="info"></param>
        public void CreateReportPurchase(ExcelInfo info)
        {
            CreateExcel(info);
            CreateHeaders(info);

            uint rowIndex = 3;
            foreach (var pc in info.ReportObjects)
            {
                if (pc is not PurchaseViewModel purchase)
                {
                    throw new ArgumentException($"Передан некорректный тип в отчет: " +
                                                $"ожидается PurchaseViewModel; Получен объект типа: {pc.GetType()}", nameof(info));
                }
                InsertCellInWorksheet(new ExcelCellParameters
                {
                    ColumnName = "B",
                    RowIndex = rowIndex,
                    Text = purchase.DatePurchase.ToShortDateString(),
                    StyleInfo = ExcelStyleInfoType.Text
                });
                InsertCellInWorksheet(new ExcelCellParameters
                {
                    ColumnName = "A",
                    RowIndex = rowIndex,
                    Text = purchase.Id.ToString(),
                    StyleInfo = ExcelStyleInfoType.Text
                });
                int i = 0;
                foreach (var car in purchase.ClassViewModels)
                {
                    if (info.Ids != null && !info.Ids.Contains(car.Id))
                    {
                        continue;
                    }
                    InsertCellInWorksheet(new ExcelCellParameters
                    {
                        ColumnName = ((char)('C' + i)).ToString(),
                        RowIndex = rowIndex,
                        Text = $"{car.Time} {car.Name} в количестве {purchase.ClassModel[car.Id].CountClass}",
                        StyleInfo = ExcelStyleInfoType.TextWithBroder
                    });
                    if (info.Ids != null)
                    {
                        break;
                    }
                    i++;
                }
                rowIndex++;
            }
            SaveExcel(info);
        }

        public void CreateReportOperations(ExcelInfo info)
        {
            CreateExcel(info);
            CreateHeaders(info);

            uint rowIndex = 3;
            foreach (var pc in info.ReportObjects)
            {
                var car = pc as ClassViewModel;
                if (car == null)
                {
                    throw new ArgumentException($"Передан некорректный тип в отчет: " +
                                                $"ожидается OperationViewModel; Получен объект типа: {pc.GetType()}", nameof(info));
                }
                foreach (var purchase in car.Purchases)
                {
                    if (info.Ids != null && !info.Ids.Contains(purchase.Id))
                    {
                        continue;
                    }
                    InsertCellInWorksheet(new ExcelCellParameters
                    {
                        ColumnName = "A",
                        RowIndex = rowIndex,
                        Text = car.Time,
                        StyleInfo = ExcelStyleInfoType.Text
                    });
                    InsertCellInWorksheet(new ExcelCellParameters
                    {
                        ColumnName = "B",
                        RowIndex = rowIndex,
                        Text = car.Name,
                        StyleInfo = ExcelStyleInfoType.Text
                    });
                    InsertCellInWorksheet(new ExcelCellParameters
                    {
                        ColumnName = "C",
                        RowIndex = rowIndex,
                        Text = purchase.ClassModel[car.Id].CountClass.ToString(),
                        StyleInfo = ExcelStyleInfoType.Text
                    });
                    InsertCellInWorksheet(new ExcelCellParameters
                    {
                        ColumnName = "C",
                        RowIndex = rowIndex,
                        Text = purchase.DatePurchase.ToString(),
                        StyleInfo = ExcelStyleInfoType.Text
                    });
                    break;
                }
                rowIndex++;
            }
            SaveExcel(info);
        }
        /// <summary>
        /// Создание excel-файла
        /// </summary>
        /// <param name="info"></param>
        protected abstract void CreateExcel(ExcelInfo info);

        /// <summary>
        /// Добавляем новую ячейку в лист
        /// </summary>
        /// <param name="cellParameters"></param>
        protected abstract void InsertCellInWorksheet(ExcelCellParameters excelParams);

        /// <summary>
        /// Объединение ячеек
        /// </summary>
        /// <param name="mergeParameters"></param>
        protected abstract void MergeCells(ExcelMergeParameters excelParams);

        /// <summary>
        /// Сохранение файла
        /// </summary>
        /// <param name="info"></param>
        protected abstract void SaveExcel(ExcelInfo info);

    }
}