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

use std::fs;
use std::path::PathBuf;

use assert_cmd::Command;
use predicates::prelude::*;
use tempfile::tempdir;

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

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

fn fixture_relative(path: &str) -> PathBuf {
    PathBuf::from("fixtures").join(path)
}

fn fixture(path: &str) -> PathBuf {
    workspace_root().join(fixture_relative(path))
}

fn relative_to_workspace(path: &str) -> String {
    fixture_relative(path).display().to_string()
}

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 groups_repetitive_logs_in_text_mode() {
    let mut command = cargo_command();
    command
        .arg(fixture("logs/repetitive.log"))
        .assert()
        .success()
        .stdout(predicate::str::contains("count=2"))
        .stdout(predicate::str::contains(
            "connected to tcp://127.0.0.1:<num>",
        ))
        .stdout(predicate::str::contains(
            "failed request id=<num> path=<path>",
        ));
}

#[test]
fn emits_json_groups_with_limits() {
    let mut command = cargo_command();
    command
        .arg("--json")
        .arg("--top")
        .arg("2")
        .arg("--min-count")
        .arg("2")
        .arg(fixture("logs/repetitive.log"))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"count\":2"))
        .stdout(predicate::str::contains("\"pattern\""))
        .stdout(predicate::str::contains("\"sample\""))
        .stdout(predicate::str::contains("retry in").not());
}

#[test]
fn supports_powershell_pipeline_input() {
    let binary = assert_cmd::cargo::cargo_bin("logshape");
    let input = relative_to_workspace("logs/repetitive.log");
    let script = format!(
        "[System.IO.File]::ReadLines('{}') | & '{}' --json --top 1",
        input,
        binary.display()
    );

    let mut command = pwsh_command(script);
    command
        .current_dir(workspace_root())
        .assert()
        .success()
        .stdout(predicate::str::contains("\"count\":2"))
        .stdout(predicate::str::contains("\"first_line\":1"));
}

#[test]
fn utf8_bom_stdin_groups_first_line_with_following_lines() {
    let mut command = cargo_command();
    command
        .args(["--json", "--min-count", "2"])
        .write_stdin(
            "\u{feff}INFO connected to tcp://127.0.0.1:5000\nINFO connected to tcp://127.0.0.1:5001\n",
        )
        .assert()
        .success()
        .stdout(predicate::str::contains("\"count\":2"))
        .stdout(predicate::str::contains("\"first_line\":1"));
}

#[test]
fn utf8_bom_log_file_groups_first_line_with_following_lines() {
    let root = tempdir().expect("tempdir");
    let log_path = root.path().join("bom.log");
    fs::write(
        &log_path,
        "\u{feff}INFO connected to tcp://127.0.0.1:5000\nINFO connected to tcp://127.0.0.1:5001\n",
    )
    .expect("bom log");

    let mut command = cargo_command();
    command
        .arg("--json")
        .arg("--min-count")
        .arg("2")
        .arg(&log_path)
        .assert()
        .success()
        .stdout(predicate::str::contains("\"count\":2"))
        .stdout(predicate::str::contains(
            "connected to tcp://127.0.0.1:<num>",
        ));
}

#[test]
fn invalid_utf8_log_file_reports_read_error_instead_of_grouping() {
    let root = tempdir().expect("tempdir");
    let log_path = root.path().join("invalid.log");
    fs::write(&log_path, b"INFO ok\n\xff\xfe\xfd\n").expect("invalid log");

    let mut command = cargo_command();
    command
        .arg(&log_path)
        .assert()
        .failure()
        .stderr(predicate::str::contains("failed to read"))
        .stderr(predicate::str::contains("valid UTF-8"));
}

#[test]
fn help_includes_grouping_examples() {
    let mut command = cargo_command();
    command
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--min-count"))
        .stdout(predicate::str::contains("ConvertFrom-Json"))
        .stdout(predicate::str::contains(
            "logshape .\\fixtures\\logs\\repetitive.log",
        ));
}