using Microsoft.Extensions.Logging;
using ProjectGarage.Repositories;
using ProjectGarage.Repositories.Implementations;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProjectGarage.Reports;

public class ChartReport
{
    private readonly ITransportationRepository _transportationRepository;
    private readonly ILogger<ChartReport> _logger;
    public ChartReport(ITransportationRepository transportationRepository, ILogger<ChartReport> logger)
    {
        _transportationRepository = transportationRepository ?? 
            throw new ArgumentNullException(nameof(transportationRepository));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }
    public bool CreateChart(string filePath, DateTime dateTime)
    {
        try
        {
            new PdfBuilder(filePath)
            .AddHeader("Транспортировка топлива")
            .AddPieChart($"Отправленное топливо на {dateTime:dd MMMM yyyy}", GetData(dateTime))
            .Build();
            return true;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при формировании документа");
            return false;
        }
    }
    private List<(string Caption, double Value)> GetData(DateTime dateTime)
    {
        return _transportationRepository
        .ReadTransportation(dateForm: dateTime.Date, dateTo: dateTime.Date.AddDays(1))
        .Where(x => x.TransportationDate.Date == dateTime.Date)
        .GroupBy(x => x.FuelName, (key, group) => new {
            FuelName = key,
            Amount = group.Sum(x => x.Amount)
        })
        .Select(x => (x.FuelName, (double)x.Amount))
        .ToList();
    }

}