public async Task GetStatistic(CoffeeService coffee, User user, string text, SlackResponse response)
{
if (!int.TryParse(text, out int days))
{
days = 180;
}
var orders = await coffee.GetCompletedOrders(user.Id, DateTime.Now, days);
var totalCount = orders.Length;
var pickedCount = orders.Count(o => o.IsPicked);
var totalPaid = orders.Sum(o => o.IsPicked ? o.Price : 0);
var orderedMenus = orders
.GroupBy(o => o.MenuId)
.Select(g => (g.Key, g.Count()))
.OrderByDescending(i => i.Item2).Take(3).ToArray();
StringBuilder sb = new StringBuilder();
sb.AppendLine($"지난 *{days}* 일 동안").AppendLine();
sb.AppendLine($"주문한 잔 수:\t*{totalCount}*");
sb.AppendLine($"마신 잔 수:\t\t*{pickedCount}*, {pickedCount / (float)totalCount:P1}");
sb.AppendLine($"총 비용:\t\t\t *{totalPaid}* 원");
if (orderedMenus.Length > 0)
{
sb.AppendLine("주로 주문한 메뉴:");
for (var i = 0; i < orderedMenus.Length; i++)
{
(var menuId, var count) = orderedMenus[i];
sb.AppendLine($" {i + 1}. *{menuId}*, {count / (float)totalCount:P1}");
}
}
response.Ephemeral(sb.ToString());
}
