using GasStation.Repositories;
using Microsoft.Extensions.Logging;

namespace GasStation.Reports;

internal class TableReport
{
    private readonly ISellingRepository _sellingRepository;
    private readonly ILogger<TableReport> _logger;

    internal static readonly string[] item = ["Сотрудник", "Дата", "Продажа"];
    public TableReport(ISellingRepository sellingRepository,
                        ILogger<TableReport> logger)
    {
        _sellingRepository = sellingRepository ??
        throw new ArgumentNullException(nameof(sellingRepository));
        _logger = logger ??
        throw new ArgumentNullException(nameof(logger));
    }
    public bool CreateTable(string filePath, int productId, DateTime startDate, DateTime endDate)
    {
        try
        {
            new ExcelBuilder(filePath)
            .AddHeader("Сводка по движению товара", 0, 3)
            .AddParagraph("за период", 0)
            .AddTable([10, 10, 15], GetData(productId, startDate, endDate))
            .Build();
            return true;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при формировании документа");
            return false;
        }
    }

    private List<string[]> GetData(int productId, DateTime startDate, DateTime endDate)
    {
        var data = _sellingRepository
                    .ReadSelling()
                    .Where(x => x.SellingDateTime >= startDate && x.SellingDateTime <= endDate && x.ProdutcSellings.Any(y => y.ProductID == productId))
                    .Select(x => new {x.GasmanId, Date = x.SellingDateTime,
                        CountOut = x.ProdutcSellings.FirstOrDefault(y => y.ProductID == productId)?.Count })
                    .OrderBy(x => x.Date);

        return new List<string[]>() { item }.Union(data
        .Select(x => 
        new string[] { x.GasmanId.ToString(), x.Date.ToString(), x.CountOut?.ToString() ?? string.Empty}))
        .Union(
            [["Всего", "", data.Sum(x => x.CountOut ?? 0).ToString()]]
            ).ToList();
    }
}