using Microsoft.Extensions.Logging;
using LDBproject.Repositories;

namespace LDBproject.Reports
{
    internal class TableReport
    {
        private readonly IOrderRep _orderRep;
        private readonly ILogger<TableReport> _logger;
        internal static readonly string[] item = { "Librarian ID", "Card ID", "Borrow Date", "Book ID", "Note" };

        public TableReport(IOrderRep orderRep, ILogger<TableReport> logger)
        {
            _orderRep = orderRep ?? throw new ArgumentNullException(nameof(orderRep));
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }

        public bool CreateTable(string filePath, DateTime startDate, DateTime endDate)
        {
            try
            {
                new ExcelBuilder(filePath)
                 .AddHeader("Report about borrowed books", 0, 5) // Updated header
                 .AddParagraph($"Period: {startDate:yyyy-MM-dd} - {endDate:yyyy-MM-dd}", 0)
                 .AddTable(new[] { 4, 4, 7, 4, 7 }, GetData(startDate, endDate)) // Updated column widths
                 .Build();
                return true;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error while forming document");
                return false;
            }
        }
        private List<string[]> GetData(DateTime startDate, DateTime endDate)
        {
            var result = new List<string[]> { item };
            var orders = _orderRep.GetOrdersInfo();

            var flattenedData = orders
                .SelectMany(order => order.Registrations
                   .Select(reg => new { order.LibrarianID, order.CardID,
                       order.BorrowDate, reg.BookID, reg.Note }))
                .Where(x => startDate <= x.BorrowDate && x.BorrowDate <= endDate)
                .ToList();

            result.AddRange(flattenedData.Select(x => new string[]
              {
                x.LibrarianID.ToString(),
                x.CardID.ToString(),
                x.BorrowDate.ToString("yyyy-MM-dd"),
                x.BookID.ToString(),
                x.Note
               }).ToList());
            int totalBookCount = flattenedData.Count;
            result.Add(new[] { "Total Books:", "", "", totalBookCount.ToString(), "" });

            return result;
        }
    }
}