use crate::tasks::{CompletedTask, IntoTaskErr, Task, TaskOutput};

pub struct Executor<'a, 't> {
    task: &'t Task,
    args: Box<[&'a str]>,
    complete_task: Option<CompletedTask>,
}

impl<'a, 't> Executor<'a, 't> {
    pub fn new(task: &'t Task, args: impl IntoIterator<Item = &'a str>) -> Result<Self, IntoTaskErr> {
        Ok(Self { task: task, args: args.into_iter().collect(), complete_task: None })
    }

    pub fn run(&mut self) -> &TaskOutput {
        let output = (self.task.exec)(&self.args);
        self.complete_task = Some(CompletedTask { name: self.task.name, output: Some(output) });
        self.complete_task.as_ref().unwrap().output.as_ref().unwrap()
    }
}