//! Integration tests for the `refs` command.

use assert_cmd::Command;
use predicates::prelude::*;
use std::path::PathBuf;

fn cargo_command() -> Command {
    Command::cargo_bin("refs").expect("binary")
}

fn fixture_path(relative: &str) -> PathBuf {
    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
        .join("..")
        .join("..")
        .join("fixtures")
        .join("polyglot")
        .join("repo")
        .join(relative)
}

fn pwsh_command(script: impl AsRef<str>) -> Command {
    let mut command = Command::new("pwsh");
    command
        .arg("-NoProfile")
        .arg("-Command")
        .arg(script.as_ref());
    command
}

#[test]
fn emits_exact_use_sites_as_json() {
    let mut command = cargo_command();
    command
        .arg("--json")
        .arg("helper")
        .arg(fixture_path(""))
        .assert()
        .success()
        .stdout(predicate::str::contains(
            "\"enclosing_qualified_name\":\"call_helper\"",
        ))
        .stdout(predicate::str::contains("\"engine\":\"codeindex\""));
}

#[test]
fn groups_hits_by_callers() {
    let mut command = cargo_command();
    command
        .args(["--callers", "helper"])
        .arg(fixture_path(""))
        .assert()
        .success()
        .stdout(predicate::str::contains("caller=call_helper"))
        .stdout(predicate::str::contains("hits=2"));
}

#[test]
fn finds_powershell_callers_in_auto_mode() {
    let mut command = cargo_command();
    command
        .args(["--callers", "--lang", "powershell", "Invoke-Helper"])
        .arg(fixture_path("scripts/tools.ps1"))
        .assert()
        .success()
        .stdout(predicate::str::contains("caller=Invoke-Formatting"));
}

#[test]
fn supports_anchor_resolution() {
    let mut command = cargo_command();
    command
        .args(["--callers", "--at"])
        .arg(format!("{}:22", fixture_path("src/lib.rs").display()))
        .arg(fixture_path(""))
        .assert()
        .success()
        .stdout(predicate::str::contains("caller=call_helper"));
}

#[test]
fn supports_powershell_pipeline_roots() {
    let binary = assert_cmd::cargo::cargo_bin("refs");
    let root = fixture_path("");
    let script = format!(
        "'{}' | & '{}' helper --json | ConvertFrom-Json | Select-Object -First 1 -ExpandProperty name",
        root.display(),
        binary.display()
    );
    let mut command = pwsh_command(script);
    command
        .assert()
        .success()
        .stdout(predicate::str::contains("helper"));
}

#[test]
fn accepts_jsonl_roots_from_stdin() {
    let root = fixture_path("");
    let mut command = cargo_command();
    command
        .args(["--json", "--input-format", "jsonl", "helper"])
        .write_stdin(format!(
            "{}\n",
            serde_json::json!({ "path": root.display().to_string() })
        ))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\":\"helper\""))
        .stdout(predicate::str::contains("\"path\":\""));
}

#[test]
fn reports_no_results_and_quiet_paths_in_text_mode() {
    let root = fixture_path("");

    let mut command = cargo_command();
    command
        .arg("totally_absent_symbol")
        .arg(&root)
        .assert()
        .failure()
        .stdout(predicate::str::contains("0 references"));

    let mut callers = cargo_command();
    callers
        .args(["--callers", "--quiet", "totally_absent_symbol"])
        .arg(root)
        .assert()
        .failure()
        .stdout(predicate::str::is_empty());
}

#[test]
fn applies_language_filters_and_limits_to_json_output() {
    let root = fixture_path("");
    let mut command = cargo_command();
    let assert = command
        .args([
            "--json",
            "--lang",
            "python,typescript",
            "--limit",
            "1",
            "helper",
        ])
        .arg(root)
        .assert()
        .success();

    let stdout = String::from_utf8(assert.get_output().stdout.clone()).expect("utf8");
    let uses = serde_json::from_str::<Vec<serde_json::Value>>(&stdout).expect("json");
    assert_eq!(uses.len(), 1);
    let path = uses[0]
        .get("path")
        .and_then(serde_json::Value::as_str)
        .expect("path");
    assert!(path.ends_with("worker.py") || path.ends_with("app.ts"));
    assert!(!path.ends_with("lib.rs"));
    assert!(!path.ends_with("app.js"));
}

#[test]
fn text_engine_reports_text_use_sites() {
    let mut command = cargo_command();
    command
        .args(["--json", "--engine", "text", "helper"])
        .arg(fixture_path("src/lib.rs"))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"engine\":\"text\""))
        .stdout(predicate::str::contains("\"name\":\"helper\""));
}

#[test]
fn help_includes_examples_and_pipeline_usage() {
    let mut command = cargo_command();
    command
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--callers"))
        .stdout(predicate::str::contains("ConvertFrom-Json"))
        .stdout(predicate::str::contains("refs helper"));
}