//! TLI CLI Integration Tests
//!
//! Tests CLI argument parsing, command routing, and error handling for the TLI binary.
//! These tests use `assert_cmd` to invoke the TLI binary and verify behavior.

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

/// Test that TLI binary can be invoked with --help
#[test]
fn test_tli_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("Foxhunt Trading System Terminal Interface"))
        .stdout(predicate::str::contains("--api-gateway-url"))
        .stdout(predicate::str::contains("--log-level"));
}

/// Test tune command help output
#[test]
fn test_tune_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("Start, monitor, and manage hyperparameter tuning"));
}

/// Test tune start command help
#[test]
fn test_tune_start_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("start")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--model"))
        .stdout(predicate::str::contains("--trials"));
}

/// Test tune status command help
#[test]
fn test_tune_status_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("status")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--job-id"));
}

/// Test auth command help output
#[test]
fn test_auth_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("auth")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("Login, logout, and manage authentication tokens"));
}

/// Test auth login command help
#[test]
fn test_auth_login_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("auth")
        .arg("login")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--username"));
}

/// Test auth status command (no authentication required)
#[test]
fn test_auth_status_no_auth() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("auth")
        .arg("status")
        .assert()
        .success() // Should succeed even without authentication
        .stdout(predicate::str::contains("Authentication Status"));
}

/// Test auth logout command (no authentication required)
#[test]
fn test_auth_logout_no_auth() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("auth")
        .arg("logout")
        .assert()
        .success() // Should succeed even if not logged in
        .stdout(predicate::str::contains("Logged out"));
}

/// Test that tune commands require authentication
/// This test expects failure when not authenticated
#[test]
fn test_tune_requires_auth() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("status")
        .arg("--job-id")
        .arg("550e8400-e29b-41d4-a716-446655440000")
        .assert()
        .failure() // Should fail without authentication
        .stderr(predicate::str::contains("Not authenticated"));
}

/// Test environment variable support for API Gateway URL
#[test]
fn test_env_var_api_gateway_url() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.env("API_GATEWAY_URL", "http://test.example.com:50051")
        .arg("--help")
        .assert()
        .success();
}

/// Test environment variable support for log level
#[test]
fn test_env_var_log_level() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.env("TLI_LOG_LEVEL", "debug")
        .arg("--help")
        .assert()
        .success();
}

/// Test CLI flag precedence over environment variables
#[test]
fn test_cli_flag_precedence() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.env("API_GATEWAY_URL", "http://env.example.com")
        .arg("--api-gateway-url")
        .arg("http://cli.example.com")
        .arg("--help")
        .assert()
        .success();
}

/// Test invalid command
#[test]
fn test_invalid_command() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("invalid_command")
        .assert()
        .failure()
        .stderr(predicate::str::contains("error"));
}

/// Test tune start with invalid model type
#[test]
fn test_tune_start_invalid_model() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("start")
        .arg("--model")
        .arg("INVALID_MODEL_TYPE")
        .arg("--trials")
        .arg("10")
        .assert()
        .failure(); // Should fail validation (even before auth check)
}

/// Test tune start missing required argument
#[test]
fn test_tune_start_missing_trials() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("start")
        .arg("--model")
        .arg("DQN")
        // Missing --trials argument (but has default, so will fail on auth instead)
        .assert()
        .failure() // Will fail due to authentication requirement
        .stderr(predicate::str::contains("Not authenticated"));
}

/// Test tune status with malformed UUID
#[test]
fn test_tune_status_invalid_uuid() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("status")
        .arg("--job-id")
        .arg("not-a-valid-uuid")
        .assert()
        .failure() // Should fail (either auth check or UUID validation)
        .stderr(predicate::str::contains("").or(predicate::str::contains(""))); // Error may vary
}

/// Test dashboard command (without launching terminal)
/// Note: This test will fail if it actually tries to launch the TUI,
/// but helps verify command parsing
#[test]
#[ignore] // Ignored because it tries to launch terminal UI
fn test_dashboard_command() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("dashboard")
        .timeout(std::time::Duration::from_secs(2))
        .assert();
    // Will timeout or fail trying to connect, but that's expected
}

/// Test version flag
#[test]
fn test_version_flag() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("--version")
        .assert()
        .success()
        .stdout(predicate::str::contains("tli"));
}

/// Test that all valid tune models are accepted by help
#[test]
fn test_tune_valid_models_in_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("start")
        .arg("--help")
        .assert()
        .success();
    // Help should display without errors, model validation happens at runtime
}

/// Test tune best command help
#[test]
fn test_tune_best_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("best")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--job-id"))
        .stdout(predicate::str::contains("--export"));
}

/// Test tune stop command help
#[test]
fn test_tune_stop_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("tune")
        .arg("stop")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("--job-id"))
        .stdout(predicate::str::contains("--reason"));
}

/// Test multiple CLI flags together
#[test]
fn test_multiple_cli_flags() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("--api-gateway-url")
        .arg("http://test.example.com")
        .arg("--log-level")
        .arg("debug")
        .arg("--help")
        .assert()
        .success();
}

/// Test auth refresh command help
#[test]
fn test_auth_refresh_help() {
    let mut cmd = Command::cargo_bin("tli").unwrap();
    cmd.arg("auth")
        .arg("refresh")
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("Refresh access token"));
}