using COP.Info;
using OfficeOpenXml;
using System.ComponentModel;
using LicenseContext = OfficeOpenXml.LicenseContext;
using OfficeOpenXml.Drawing.Chart;

namespace COP
{
    public partial class PieChart : Component
    {
        public PieChart()
        {
            InitializeComponent();
        }

        public PieChart(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }

        public void GenerateDocument(ExcelChartInfo info)
        {
            if (string.IsNullOrEmpty(info.filePath))
            {
                throw new ArgumentException("File path is null or empty.");
            }
            if (string.IsNullOrEmpty(info.chartTitle))
            {
                throw new ArgumentException("Chart title is null or empty.");
            }
            if (string.IsNullOrEmpty(info.documentTitle))
            {
                throw new ArgumentException("Document title is null or empty.");
            }
            if (info.data == null || info.data.Count == 0)
            {
                throw new ArgumentException("Data is null or empty.");
            }

            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
            using ExcelPackage excelPackage = new();            

            ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets.Add("Sheet 1");
            worksheet.Cells["A1"].Value = info.documentTitle;

            int row = 2;
            int startCol = 1;
            int endCol = 1;            

            foreach (var data in info.data)
            {
                worksheet.Cells[row, endCol].Value = data.Name;
                worksheet.Cells[row + 1, endCol].Value = data.Value;
                endCol++;
            }

            ExcelPieChart? pieChart = worksheet.Drawings.AddChart(info.chartTitle, eChartType.Pie) as ExcelPieChart;
            pieChart.Title.Text = info.chartTitle;
            pieChart.Series.Add(ExcelCellBase.GetAddress(row + 1, startCol, row + 1, endCol - 1), 
            ExcelCellBase.GetAddress(row, startCol, row, endCol - 1));

            pieChart.Legend.Position = (eLegendPosition)(int)info.legendPosition;
            pieChart.DataLabel.ShowPercent = true;
            pieChart.SetPosition(1, 0, 0, 0);
            FileInfo fi = new(info.filePath);
            excelPackage.SaveAs(fi);
        }
    }
}