//! End-to-end coverage for the `aura process` verb family (#188/#189): drives
//! the built `aura` binary over argv/file, the exact surface a data-level
//! author uses.

use std::path::{Path, PathBuf};

/// A fresh, unique working directory for a process test that persists
/// content-addressed documents under `./runs/` (so `aura process register`
/// never dirties the repo). Unique per test + per process; no external
/// tempfile dependency (mirrors `cli_run.rs` / `cli_broken_pipe.rs`).
fn temp_cwd(name: &str) -> PathBuf {
    let dir = std::env::temp_dir().join(format!("aura-cli-{}-{}", std::process::id(), name));
    let _ = std::fs::remove_dir_all(&dir);
    std::fs::create_dir_all(&dir).expect("create temp cwd");
    dir
}

fn run_code_in(dir: &Path, args: &[&str]) -> (String, Option<i32>) {
    let out = std::process::Command::new(env!("CARGO_BIN_EXE_aura"))
        .args(args)
        .current_dir(dir)
        .output()
        .expect("binary runs");
    let text = format!(
        "{}{}",
        String::from_utf8_lossy(&out.stdout),
        String::from_utf8_lossy(&out.stderr)
    );
    (text, out.status.code())
}

fn run_code(args: &[&str]) -> (String, Option<i32>) {
    run_code_in(Path::new("."), args)
}

const PROCESS_DOC: &str = r#"{
  "format_version": 1,
  "kind": "process",
  "name": "wf-deflated-screen",
  "pipeline": [
    { "block": "std::sweep", "metric": "net_expectancy_r", "select": "plateau:worst", "deflate": true },
    { "block": "std::gate", "all": [
        { "metric": "net_expectancy_r", "cmp": "gt", "value": 0.0 },
        { "metric": "overfit_probability", "cmp": "lt", "value": 0.1 } ] },
    { "block": "std::walk_forward", "folds": 4, "in_sample_bars": 4000,
      "out_of_sample_bars": 1000, "metric": "net_expectancy_r", "select": "argmax" }
  ]
}"#;

fn write_doc(dir: &Path, name: &str, text: &str) -> PathBuf {
    let p = dir.join(name);
    std::fs::write(&p, text).expect("write doc");
    p
}

#[test]
fn process_validate_reports_intrinsic_ok() {
    let dir = temp_cwd("process-validate-ok");
    write_doc(&dir, "p.process.json", PROCESS_DOC);
    let (out, code) = run_code_in(&dir, &["process", "validate", "p.process.json"]);
    assert_eq!(code, Some(0), "stdout/stderr: {out}");
    assert!(out.contains("process document valid (intrinsic): 3 pipeline blocks, 2 gate predicates"));
}

#[test]
fn process_validate_refuses_unknown_metric_as_prose_exit_1() {
    let dir = temp_cwd("process-validate-bad-metric");
    let bad = PROCESS_DOC.replacen(
        "net_expectancy_r\", \"select\": \"plateau:worst",
        "netto_r\", \"select\": \"plateau:worst",
        1,
    );
    write_doc(&dir, "bad.process.json", &bad);
    let (out, code) = run_code_in(&dir, &["process", "validate", "bad.process.json"]);
    assert_eq!(code, Some(1));
    assert!(out.contains("unknown metric \"netto_r\""));
    assert!(!out.contains("UnknownMetric"), "Debug leak: {out}");
}

#[test]
fn process_introspect_vocabulary_block_and_content_id() {
    let (out, code) = run_code(&["process", "introspect", "--vocabulary"]);
    assert_eq!(code, Some(0));
    for id in ["std::sweep", "std::gate", "std::walk_forward", "std::monte_carlo", "std::generalize"] {
        assert!(out.contains(id), "vocabulary misses {id}: {out}");
    }
    let (out, code) = run_code(&["process", "introspect", "--block", "std::sweep"]);
    assert_eq!(code, Some(0));
    assert!(out.contains("metric"));
    assert!(out.contains("required"));

    let dir = temp_cwd("process-introspect-content-id");
    write_doc(&dir, "p.process.json", PROCESS_DOC);
    let (out, code) = run_code_in(&dir, &["process", "introspect", "--content-id", "p.process.json"]);
    assert_eq!(code, Some(0), "stdout/stderr: {out}");
    let line = out.lines().find(|l| l.starts_with("content:")).expect("id line");
    assert_eq!(line.len(), "content:".len() + 64);
}

#[test]
fn process_introspect_unknown_block_is_prose_exit_1() {
    let (out, code) = run_code(&["process", "introspect", "--block", "std::nope"]);
    assert_eq!(code, Some(1), "stdout/stderr: {out}");
    assert!(out.contains("unknown block \"std::nope\""), "stdout/stderr: {out}");
}

#[test]
fn process_introspect_unwired_lists_open_slots() {
    let dir = temp_cwd("process-introspect-unwired");
    let partial = r#"{ "format_version": 1, "kind": "process",
        "pipeline": [ { "block": "std::sweep", "metric": "sqn" } ] }"#;
    write_doc(&dir, "partial.process.json", partial);
    let (out, code) = run_code_in(&dir, &["process", "introspect", "--unwired", "partial.process.json"]);
    assert_eq!(code, Some(0));
    assert!(out.contains("open slot: name"));
    assert!(out.contains("open slot: pipeline[0].select"));
}

#[test]
fn process_introspect_no_flag_is_usage_exit_2() {
    let (_out, code) = run_code(&["process", "introspect"]);
    assert_eq!(code, Some(2));
}

#[test]
fn process_register_stores_content_addressed_under_runs_root() {
    let dir = temp_cwd("process-register");
    write_doc(&dir, "p.process.json", PROCESS_DOC);
    let (out, code) = run_code_in(&dir, &["process", "register", "p.process.json"]);
    assert_eq!(code, Some(0), "stdout/stderr: {out}");
    let line = out.lines().find(|l| l.starts_with("registered process content:")).expect("line");
    let id = line
        .trim_start_matches("registered process content:")
        .split(' ')
        .next()
        .expect("id");
    assert!(dir.join("runs").join("processes").join(format!("{id}.json")).is_file());
}