use kernelx_core::{Error, Result};
use serde_json::json;

#[test]
fn test_error_display() {
    let errors = vec![
        Error::Config("test error".to_string()),
        Error::NoContent,
        Error::RateLimit,
        Error::Timeout,
        Error::ValidationError("invalid input".to_string()),
        Error::InvalidConfig("missing key".to_string()),
        Error::UnsupportedCapability("Vision".to_string()),
        Error::ModelNotFound("gpt-5".to_string()),
        Error::Serialization(serde_json::from_value::<String>(json!(42)).unwrap_err()),
    ];

    for error in errors {
        assert!(!error.to_string().is_empty());
    }
}

#[test]
fn test_error_conversion() {
    // Test From implementations
    let env_error = std::env::VarError::NotPresent;
    let error: Error = env_error.into();
    assert!(matches!(error, Error::Environment(_)));

    let json_error = serde_json::from_str::<String>("invalid").unwrap_err();
    let error: Error = json_error.into();
    assert!(matches!(error, Error::Serialization(_)));

    // Test Result type alias
    let result: Result<()> = Ok(());
    assert!(result.is_ok());

    let result: Result<()> = Err(Error::NoContent);
    assert!(result.is_err());
}