use anyhow::Result;

use self::{day01::Day, template::DayTrait};
use thiserror::Error;

pub use template::ResultType;

mod day01;
mod template;

#[derive(Debug, Error)]
pub enum TemplateError {
    #[error("Not a valid day number: {0}")]
    InvalidNumber(usize),
}

pub struct DayProvider {
    days: Vec<Box<dyn DayTrait>>,
}

impl DayProvider {
    pub fn create() -> DayProvider {
        DayProvider {
            days: vec![Box::new(Day)],
        }
    }

    pub fn get_day(&self, day_num: usize) -> Result<&Box<dyn DayTrait>> {
        Ok(self
            .days
            .get(day_num - 1)
            .ok_or(TemplateError::InvalidNumber(day_num))?)
    }

    pub fn get_all_days(&self) -> &[Box<dyn DayTrait>] {
        &self.days
    }
}