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

use std::{
    fs,
    path::PathBuf,
    sync::atomic::{AtomicU64, Ordering},
};

use assert_cmd::Command;
use predicates::prelude::*;
use serde_json::Value;

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

fn cargo_binary() -> PathBuf {
    assert_cmd::cargo::cargo_bin("cjson")
}

fn powershell_command(script: String) -> Command {
    let mut command = Command::new("pwsh");
    command.args(["-NoProfile", "-Command"]).arg(script);
    command
}

fn ps_quote(value: impl std::fmt::Display) -> String {
    format!("'{}'", value.to_string().replace('\'', "''"))
}

fn workspace_root() -> PathBuf {
    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
        .join("..")
        .join("..")
}

fn fixture(path: &str) -> PathBuf {
    let fixture = workspace_root().join("fixtures").join(path);
    assert!(
        fixture.exists(),
        "missing fixture `{path}` at {}",
        fixture.display()
    );
    fixture
}

fn json_stdout(output: &[u8]) -> Value {
    serde_json::from_slice(output).unwrap_or_else(|error| {
        panic!(
            "stdout should be valid JSON: {error}\n{}",
            String::from_utf8_lossy(output)
        )
    })
}

struct TempTestDir {
    path: PathBuf,
}

impl TempTestDir {
    fn path(&self) -> &std::path::Path {
        &self.path
    }
}

impl Drop for TempTestDir {
    fn drop(&mut self) {
        let _ = fs::remove_dir_all(&self.path);
    }
}

fn temp_test_dir(name: &str) -> TempTestDir {
    static NEXT_ID: AtomicU64 = AtomicU64::new(0);

    loop {
        let unique = NEXT_ID.fetch_add(1, Ordering::Relaxed);
        let path =
            std::env::temp_dir().join(format!("cjson-{}-{name}-{unique}", std::process::id()));
        match fs::create_dir(&path) {
            Ok(()) => return TempTestDir { path },
            Err(error) if error.kind() == std::io::ErrorKind::AlreadyExists => {}
            Err(error) => panic!("temp test dir: {error}"),
        }
    }
}

#[test]
fn compacts_json_file_in_text_mode() {
    let output = cargo_command()
        .arg(fixture("cjson/sample.json"))
        .assert()
        .success()
        .get_output()
        .stdout
        .clone();

    let compacted: Value = json_stdout(&output);
    assert_eq!(
        compacted["name"],
        "Ada",
        "stdout={}",
        String::from_utf8_lossy(&output)
    );
    assert_eq!(
        compacted["a"]["x"],
        1,
        "stdout={}",
        String::from_utf8_lossy(&output)
    );
}

#[test]
fn sort_keys_reorders_objects_recursively() {
    cargo_command()
        .arg("--sort-keys")
        .write_stdin(
            "{\"z\":3,\"a\":{\"y\":2,\"x\":1},\"items\":[{\"b\":2,\"a\":1}],\"name\":\"Ada\"}",
        )
        .assert()
        .success()
        .stdout(
            "{\"a\":{\"x\":1,\"y\":2},\"items\":[{\"a\":1,\"b\":2}],\"name\":\"Ada\",\"z\":3}\n",
        );
}
#[test]
fn explicit_path_wins_over_piped_stdin_noise() {
    cargo_command()
        .arg(fixture("cjson/sample.json"))
        .write_stdin("not json from upstream pipeline")
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\":\"Ada\""));
}

#[test]
fn json_wrapper_reports_jsonl_documents() {
    let output = cargo_command()
        .arg("--input-format")
        .arg("jsonl")
        .arg("--sort-keys")
        .arg("--json")
        .arg(fixture("cjson/records.jsonl"))
        .assert()
        .success()
        .get_output()
        .stdout
        .clone();

    let payload = json_stdout(&output);
    assert_eq!(
        payload["format"],
        "jsonl",
        "stdout={}",
        String::from_utf8_lossy(&output)
    );
    assert_eq!(
        payload["documents"],
        2,
        "stdout={}",
        String::from_utf8_lossy(&output)
    );
    assert!(
        payload["text"]
            .as_str()
            .is_some_and(|text| text.contains("\"event\":\"login\",\"ok\":true")),
        "stdout={}",
        String::from_utf8_lossy(&output)
    );
}

#[test]
fn auto_mode_treats_explicit_jsonl_and_ndjson_paths_as_line_streams() {
    let temp = temp_test_dir("auto-jsonl-paths");
    let jsonl = temp.path().join("single.jsonl");
    let ndjson = temp.path().join("single.ndjson");
    fs::write(&jsonl, "{\"ok\":true}\n").expect("jsonl fixture");
    fs::write(&ndjson, "{\"ok\":true}\n").expect("ndjson fixture");

    for path in [&jsonl, &ndjson] {
        let mut command = cargo_command();
        command
            .arg("--json")
            .arg(path)
            .assert()
            .success()
            .stdout(predicate::str::contains("\"format\":\"jsonl\""))
            .stdout(predicate::str::contains("\"documents\":1"));
    }
}

#[test]
fn supports_powershell_pipeline() {
    let binary = cargo_binary();
    let input = fixture("cjson/records.jsonl");
    let script = format!(
        "[System.IO.File]::ReadLines({}) | & {} --input-format jsonl --sort-keys",
        ps_quote(input.display()),
        ps_quote(binary.display())
    );

    powershell_command(script)
        .assert()
        .success()
        .stdout(predicate::str::contains(
            "{\"event\":\"login\",\"ok\":true}",
        ))
        .stdout(predicate::str::contains(
            "{\"event\":\"logout\",\"ok\":false}",
        ));
}

#[test]
fn accepts_single_stdin_path_stream_in_lines_mode() {
    cargo_command()
        .args(["--input-format", "lines"])
        .write_stdin(format!("{}\n", fixture("cjson/sample.json").display()))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\":\"Ada\""));
}

#[test]
fn lines_mode_accepts_windows_paths_with_quotes_and_spaces() {
    let temp = temp_test_dir("quoted path");
    let path = temp.path().join("Ada's sample.json");
    fs::write(&path, "{\"name\":\"Ada\",\"ok\":true}\n").expect("quoted path fixture");

    cargo_command()
        .args(["--input-format", "lines"])
        .write_stdin(format!("{}\n", path.display()))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\":\"Ada\""));
}

#[test]
fn help_includes_examples_and_sort_keys_flag() {
    cargo_command()
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--sort-keys"))
        .stdout(predicate::str::contains(
            "bat --style=plain --paging=never .\\fixtures\\cjson\\records.jsonl",
        ))
        .stdout(predicate::str::contains("ConvertFrom-Json"));
}