namespace JdeScoping.Core.Interfaces;

/// <summary>
/// Service for generating Excel template files for data entry.
/// </summary>
public interface IExcelTemplateService
{
    /// <summary>
    /// Generates an Excel file with a single column of data.
    /// </summary>
    /// <typeparam name="T">Type of data items.</typeparam>
    /// <param name="data">Data items to write.</param>
    /// <param name="headerText">Header text for the column.</param>
    /// <returns>Excel file as byte array.</returns>
    byte[] GenerateSingleColumn<T>(IEnumerable<T> data, string headerText);

    /// <summary>
    /// Generates an Excel file with multiple columns of data.
    /// </summary>
    /// <param name="data">2D array of data (rows x columns).</param>
    /// <param name="headers">Header text for each column.</param>
    /// <returns>Excel file as byte array.</returns>
    byte[] GenerateMultiColumn(object?[][] data, string[] headers);
}