use chrono::Utc;
use uuid::Uuid;

use crate::prelude::*;

use super::MainScreen;

impl MainScreen {
    pub fn task_filter (self) -> impl Fn(&&Task) -> bool {
        move |task: &&Task| match self {
            Self::All       => true,
            Self::Cancelled => task.status == TaskStatus::Cancelled,
            Self::Pending   => task.status == TaskStatus::Pending,
            Self::Done      => task.status == TaskStatus::Done,
            Self::Expired   => task.expiring_at.is_some_and(|dt| Utc::now() > dt),
            Self::Recurring => std::mem::discriminant(&task.kind) == std::mem::discriminant(&TaskKind::Recurring { parent: Uuid::default() }),
        }
    }
}