dashboard.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Pharmacy_Management_Sysytem.BusinessLogic;
using Pharmacy_Management_Sysytem.Common;

namespace Pharmacy_Management_Sysytem
{
    /// <summary>
    /// Dashboard user control displaying medicine statistics and charts
    /// </summary>
    public partial class dashboard : UserControl
    {
        private readonly IMedicineService _medicineService;

        /// <summary>
        /// Initializes a new instance of the dashboard class
        /// </summary>
        public dashboard()
        {
            InitializeComponent();
            _medicineService = Program.Services.MedicineService;
        }

        /// <summary>
        /// Loads the medicine validity chart with current data
        /// </summary>
        private void LoadChart()
        {
            try
            {
                // Clear existing chart data
                chart1.Series["Valid Medicine"].Points.Clear();
                chart1.Series["Expired Medicine"].Points.Clear();

                // Get medicine statistics
                var statisticsResult = _medicineService.GetMedicineStatistics();
                if (statisticsResult.IsSuccess)
                {
                    var statistics = statisticsResult.Data;
                    
                    // Add data to chart
                    chart1.Series["Valid Medicine"].Points.AddXY("Medicine Validity Chart", statistics.ValidMedicines);
                    chart1.Series["Expired Medicine"].Points.AddXY("Medicine Validity Chart", statistics.ExpiredMedicines);
                }
                else
                {
                    MessageBox.Show($"Error loading chart data: {statisticsResult.ErrorMessage}", 
                                  "Chart Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Error loading chart: {ex.Message}", 
                              "Chart Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        /// <summary>
        /// Handles the refresh button click event
        /// </summary>
        /// <param name="sender">The event sender</param>
        /// <param name="e">The event arguments</param>
        private void btnRefresh_Click(object sender, EventArgs e)
        {
            LoadChart();
        }

        /// <summary>
        /// Handles the dashboard load event
        /// </summary>
        /// <param name="sender">The event sender</param>
        /// <param name="e">The event arguments</param>
        private void dashboard_Load(object sender, EventArgs e)
        {
            LoadChart();
        }
    }
}