use super::{Directory, fixture};
use dever::compiler::{build, project::Project};
use dever::syntax::source::Source;

fn project(directory: &Directory) -> Project {
    let mut project = Project::load(&fixture().with_file_name("parallel.dever")).unwrap();
    let source = &project.sources[0];
    let text = source.text.replace(
        "PARALLEL_FIXTURE_PATH",
        directory.0.join("stream.data").to_str().unwrap(),
    );
    project.sources[0] = Source::new(source.id, source.path.clone(), text);
    project
}

#[test]
fn native_parallel_consumers_cover_threads_workers_tasks_and_streams() {
    let directory = Directory::new();
    let project = project(&directory);
    let program = project.check().unwrap();
    for (entry, expected) in [
        ("syncVerify", "sync\nsync\nsync\nsync\nbyte\nbyte\ntrue\n"),
        (
            "workerVerify",
            "worker\nworker\nworker\nworker\n3\n3\ntrue\n",
        ),
        ("streamVerify", "chunk\nchunk\nchunk\nchunk\ntrue\n"),
        ("asyncVerify", "true\n"),
        ("nestedVerify", "true\n"),
        ("sourceFailure", "true\n"),
        ("cancelVerify", "true\n"),
    ] {
        let binary =
            build::build(&program, &project.sources, entry, &directory.0.join(entry)).unwrap();
        let result = std::process::Command::new(binary).output().unwrap();
        assert!(
            result.status.success(),
            "{entry}: {}",
            String::from_utf8_lossy(&result.stderr)
        );
        assert_eq!(result.stdout, expected.as_bytes(), "{entry}");
    }
}

#[test]
fn parallel_failures_and_limits_keep_original_locations() {
    let directory = Directory::new();
    let project = project(&directory);
    let program = project.check().unwrap();
    for (entry, needle, message) in [
        (
            "syncFailure",
            "dever.io.ReadEvent.Failed(\"sync worker\")",
            "ReadEvent.Failed",
        ),
        (
            "syncInvalid",
            "parallelEach(report, [], 0",
            "parallel concurrency must be within 1..256",
        ),
        (
            "asyncInvalid",
            "parallelEach(sendOne, [], 65537",
            "group limit must be within 1..65536",
        ),
        (
            "workerInvalid",
            "parallelEach(report, [], 257",
            "parallel concurrency must be within 1..256",
        ),
    ] {
        let binary =
            build::build(&program, &project.sources, entry, &directory.0.join(entry)).unwrap();
        let result = std::process::Command::new(binary).output().unwrap();
        assert!(!result.status.success(), "{entry}");
        let error = String::from_utf8(result.stderr).unwrap();
        let source = &project.sources[0];
        let (line, column) = source.position(source.text.find(needle).unwrap());
        assert!(error.contains(message), "{entry}: {error}");
        assert!(
            error.contains(&format!("parallel.dever:{line}:{column}:")),
            "{entry}: {error}"
        );
    }
}