use std::{time::SystemTime};
use u_lib::{
    errors::UError,
    models::{
        jobs::{JobMeta},
        ExecResult,
        misc::JobType
    },
    builder::{JobBuilder, NamedJobBuilder}
};

type TestResult<R = ()> = Result<R, Box<dyn std::error::Error>>;

#[tokio::test]
async fn test_is_really_async() {
    const SLEEP_SECS: u64 = 1;
    let job = JobMeta::from_shell(format!("sleep {}", SLEEP_SECS)).unwrap();
    let sleep_jobs: Vec<JobMeta> = (0..50).map(|_| job.clone()).collect();
    let now = SystemTime::now();
    JobBuilder::from_meta(sleep_jobs).unwrap_one().wait().await;
    assert!(now.elapsed().unwrap().as_secs() < SLEEP_SECS + 2)
}

#[test_case(
    "/bin/sh {}", 
    Some(b"echo test01 > /tmp/asd; cat /tmp/asd"), 
    "test01"
    ;"sh payload"
)]
#[test_case(
    r#"/usr/bin/python -c 'print("test02")'"#, 
    None, 
    "test02"
    ;"python cmd"
)]
#[test_case(
    "/{}", 
    Some(
br#"#!/bin/sh
TMPPATH=/tmp/lol
mkdir -p $TMPPATH
echo test03 > $TMPPATH/t
cat $TMPPATH/t"#
    ),
    "test03"
    ;"sh multiline payload"
)]
#[test_case(
    "/{} 'some msg as arg'",
    Some(include_bytes!("../fixtures/echoer")),
    "some msg as arg"
    ;"standalone binary with args"
)]
#[tokio::test]
async fn test_shell_job(cmd: &str, payload: Option<&[u8]>, expected_result: &str) -> TestResult {
    let mut job = JobMeta::builder().with_shell(cmd); 
    if let Some(p) = payload {
        job = job.with_payload(p);
    }
    let job = job.build().unwrap(); 
    let job_result = JobBuilder::from_meta(job).unwrap_one().wait_one().await;
    let result = unwrap_enum!(job_result, ExecResult::Assigned);
    let result = result.to_string_result().unwrap();
    assert_eq!(result.trim(), expected_result);
    Ok(())
}

#[tokio::test]
async fn test_complex_load() -> TestResult {
    const SLEEP_SECS: u64 = 1;
    let now = SystemTime::now();
    let longest_job = JobMeta::from_shell(format!("sleep {}", SLEEP_SECS)).unwrap();
    let longest_job = JobBuilder::from_meta(longest_job).unwrap_one().spawn().await; 
    let ls = JobBuilder::from_meta(JobMeta::from_shell("ls")?).unwrap_one()
        .wait_one()
        .await;
    let ls = unwrap_enum!(ls, ExecResult::Assigned);
    assert_eq!(ls.retcode.unwrap(), 0);
    let folders = ls.to_string_result().unwrap();
    let subfolders_jobs: Vec<JobMeta> = folders
        .lines()
        .map(|f| JobMeta::from_shell(format!("ls {}", f)).unwrap())
        .collect();
    let ls_subfolders = JobBuilder::from_meta(subfolders_jobs)
        .unwrap_one()
        .wait()
        .await;
    for result in ls_subfolders {
        let result = unwrap_enum!(result, ExecResult::Assigned);
        assert_eq!(result.retcode.unwrap(), 0);
    }
    longest_job.wait().await;
    assert_eq!(now.elapsed().unwrap().as_secs(), SLEEP_SECS);
    Ok(())
}
/*
#[tokio::test]
async fn test_exec_multiple_jobs_nowait() -> UResult<()> {
    const REPEATS: usize = 10;
    let job = JobMeta::from_shell("whoami");
    let sleep_jobs: Vec<JobMeta> = (0..=REPEATS).map(|_| job.clone()).collect();
    build_jobs(sleep_jobs).spawn().await;
    let mut completed = 0;
    while completed < REPEATS {
        let c = pop_completed().await.len();
        if c > 0 {
            completed += c;
            println!("{}", c);
        }
    }
    Ok(())
}
*/
#[tokio::test]
async fn test_failing_shell_job() -> TestResult {
    let job = JobMeta::from_shell("lol_kek_puk")?;
    let job_result = JobBuilder::from_meta(job)
        .unwrap_one()
        .wait_one()
        .await;
    let job_result = unwrap_enum!(job_result, ExecResult::Assigned);
    let output = job_result.to_string_result().unwrap();
    assert!(output.contains("No such file"));
    assert!(job_result.retcode.is_none());
    Ok(())
}

#[test_case(
    "/bin/bash {}", 
    None, 
    "contains executable"
    ; "no binary"
)]
#[test_case(
    "/bin/bash", 
    Some(b"whoami"), 
    "contains no executable"
    ; "no path to binary"
)]
#[tokio::test]
async fn test_job_building_failed(cmd: &str, payload: Option<&[u8]>, err_str: &str) -> TestResult {
    let mut job = JobMeta::builder().with_shell(cmd);
    if let Some(p) = payload {
        job = job.with_payload(p);
    }
    let err = job.build().unwrap_err();
    let err_msg = unwrap_enum!(err, UError::JobArgsError);
    assert!(err_msg.contains(err_str));
    Ok(())
}

#[tokio::test]
async fn test_different_job_types() -> TestResult {
    let mut jobs = NamedJobBuilder::from_meta(vec![
        ("sleeper", JobMeta::from_shell("sleep 3")?),
        ("gatherer", JobMeta::builder().with_type(JobType::Manage).build()?)
    ]).wait().await;
    let gathered = jobs.pop("gatherer");
    assert_eq!(unwrap_enum!(gathered, ExecResult::Agent).alias, None);
    Ok(())
}