//! RED PHASE: Failing tests that define exact behavior expected for error conversion

use anyhow::Error;
use rtx_eval::error::RTXEvalError;

#[cfg(test)]
mod error_conversion_tests {
    use super::*;

    /// TEST: RTXEvalError should convert from anyhow::Error seamlessly
    /// This test defines the expected behavior for anyhow integration
    #[test]
    fn test_rtx_error_from_anyhow_error() {
        let anyhow_error = anyhow::anyhow!("Test validation error");

        // This should compile and work - currently fails
        let rtx_error: RTXEvalError = anyhow_error.into();

        // Should be wrapped as ValidationError
        match rtx_error {
            RTXEvalError::ValidationError { message } => {
                assert!(message.contains("Test validation error"));
            }
            _ => panic!("Expected ValidationError variant"),
        }
    }

    /// TEST: RTXEvalResult should work with ? operator from anyhow functions
    #[test]
    fn test_anyhow_question_mark_operator() {
        fn returns_anyhow_error() -> anyhow::Result<()> {
            Err(anyhow::anyhow!("Anyhow error"))
        }

        fn uses_rtx_result() -> rtx_eval::RTXEvalResult<()> {
            returns_anyhow_error()?; // This should work after implementing From<anyhow::Error>
            Ok(())
        }

        let result = uses_rtx_result();
        assert!(result.is_err());

        match result.unwrap_err() {
            RTXEvalError::ValidationError { .. } => {} // Expected
            _ => panic!("Wrong error type"),
        }
    }

    /// TEST: Chain of error conversions should preserve context
    #[test]
    fn test_error_chain_preservation() {
        let io_error = std::io::Error::new(std::io::ErrorKind::NotFound, "File not found");
        let anyhow_error = anyhow::Error::from(io_error).context("Failed to read benchmark data");
        let rtx_error: RTXEvalError = anyhow_error.into();

        // Should preserve error context
        let error_string = format!("{}", rtx_error);
        assert!(error_string.contains("Failed to read benchmark data"));
    }
}