using System.ComponentModel;
using Excel = Microsoft.Office.Interop.Excel;

namespace Components
{
    public partial class ComponentExcelWithPieDiagram : Component
    {
        public ComponentExcelWithPieDiagram()
        {
            InitializeComponent();
        }

        public ComponentExcelWithPieDiagram(IContainer container) : this()
        {
            container.Add(this);
        }

        public enum LegendPosition
        {
            Top,
            Bottom,
            Left,
            Right
        }

        public class ChartData
        {
            [DisplayName("Серия")]
            public string SeriesName { get; set; }
            [DisplayName("Значение")]
            public double SeriesValue { get; set; }
        }

        private void CheckInputValues(
            string filePath,
            string fileTitle,
            string chartTitle,
            LegendPosition legendPosition,
            List<ChartData> data)
        {
            if (string.IsNullOrEmpty(filePath))
            {
                throw new ArgumentNullException(nameof(filePath));
            }
            if (string.IsNullOrEmpty(fileTitle))
            {
                throw new ArgumentNullException(nameof(fileTitle));
            }
            if (string.IsNullOrEmpty(chartTitle))
            {
                throw new ArgumentNullException(nameof(chartTitle));
            }
            double chartSum = 0;
            foreach (var item in data)
            {
                if (!string.IsNullOrEmpty(item.SeriesName)) { chartSum += item.SeriesValue; }
                else
                {
                    throw new ArgumentNullException("Series name is null or empty");
                }
                if (item.SeriesValue == 0 || item.SeriesValue > 100)
                {
                    throw new ArgumentOutOfRangeException("Series value is out of range");
                }
            }
            if (chartSum > 100)
            {
                throw new ArgumentOutOfRangeException("Series values sum is out of range");
            }
        }

        public void CreateExcelWithPieChart(
            string filePath,
            string fileTitle,
            string chartTitle,
            LegendPosition legendPosition,
            List<ChartData> data)
        {
            CheckInputValues(filePath, fileTitle, chartTitle, legendPosition, data);

            Excel.Application excelApp = new Excel.Application();
            Excel.Workbook workbook = excelApp.Workbooks.Add();
            Excel.Worksheet worksheet = workbook.Sheets[1];

            worksheet.Cells[1, 1] = fileTitle;

            int dataStartRow = 3;
            for (int i = 0; i < data.Count; i++)
            {
                worksheet.Cells[dataStartRow + i, 1] = data[i].SeriesName;
                worksheet.Cells[dataStartRow + i, 2] = data[i].SeriesValue;
            }

            Excel.ChartObjects chartObjects = (Excel.ChartObjects)worksheet.ChartObjects();
            Excel.ChartObject chartObject = chartObjects.Add(300, 50, 400, 300);
            Excel.Chart chart = chartObject.Chart;

            chart.ChartType = Excel.XlChartType.xlPie;

            Excel.Range chartRange = worksheet.get_Range("A3", $"B{dataStartRow + data.Count - 1}");
            chart.SetSourceData(chartRange);

            chart.HasTitle = true;
            chart.ChartTitle.Text = chartTitle;

            SetLegendPosition(chart, legendPosition);

            workbook.SaveAs(filePath);
            workbook.Close();
            excelApp.Quit();

            ReleaseObject(worksheet);
            ReleaseObject(workbook);
            ReleaseObject(excelApp);
        }

        private void SetLegendPosition(Excel.Chart chart, LegendPosition legendPosition)
        {
            chart.HasLegend = true;

            switch (legendPosition)
            {
                case LegendPosition.Top:
                    chart.Legend.Position = Excel.XlLegendPosition.xlLegendPositionTop;
                    break;
                case LegendPosition.Bottom:
                    chart.Legend.Position = Excel.XlLegendPosition.xlLegendPositionBottom;
                    break;
                case LegendPosition.Left:
                    chart.Legend.Position = Excel.XlLegendPosition.xlLegendPositionLeft;
                    break;
                case LegendPosition.Right:
                    chart.Legend.Position = Excel.XlLegendPosition.xlLegendPositionRight;
                    break;
            }
        }

        private void ReleaseObject(object obj)
        {
            try
            {
                if (obj != null)
                {
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                    obj = null;
                }
            }
            catch (Exception ex)
            {
                obj = null;
                Console.WriteLine("Error releasing object: " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }
    }
}