using Microsoft.Extensions.Logging;
using ProjectFamilyBudget.Entities;
using ProjectFamilyBudget.Repositories;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ProjectFamilyBudget.Reports;

public class ChartReport
{
    private readonly IPeopleExpense _peopleExpense;
    private readonly ILogger<ChartReport> _logger;

    public ChartReport(IPeopleExpense peopleExpense, ILogger<ChartReport> logger)
    {
        _peopleExpense = peopleExpense ?? throw new ArgumentNullException(nameof(peopleExpense));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }
    public bool CreateChart(string filePath, int expenseId, DateTime dateTime)
    {
        try
        {
            new PdfBuilder(filePath)
                .AddHeader("Траты людей")
                .AddPieChart($"Траты за {dateTime:dd MMMM yyyy}", GetData(expenseId, dateTime))
                .Build();   
            return true;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при формировании документа");
            return false;
        }
    }
    private List<(string Caption, double Value)> GetData(int expenseId, DateTime dateTime)
    {
        return _peopleExpense
            .ReadPeopleExpense(dateTime.Date, dateTime.Date.AddDays(1), expenseId)
            .GroupBy(x => x.PeopleName, (key, group) => new 
            {
                PeopleName = key, 
                Count = group.Sum(x => x.ExpensePeopleExpenses.FirstOrDefault(y => y.ExpenseId == expenseId)?.Sum ?? 0) 
            })
            .Select(x => (x.PeopleName, (double)x.Count))
            .ToList();
    }
}