// Extreme TDD test to expose and fix NamedFrom trait implementation bug
// Following Toyota Way: Write test FIRST, then fix implementation

#[test]
fn test_namedfrom_trait_requirement() {
    // TDD: This test exposes the NamedFrom trait implementation issue
    // Bug location: src/backend/arrow_integration.rs:180
    // Known bug: Series::new() with Vec<Option<T>> doesn't satisfy NamedFrom trait

    // The error shows Series doesn't implement NamedFrom<Vec<Option<T>>, _>
    // But it DOES implement many other NamedFrom variants:

    let supported_types = vec![
        "NamedFrom<&polars::prelude::Series, str>",
        "NamedFrom<T, ListType>",
        "NamedFrom<T, T>",
        "NamedFrom<T, [&[u8]]>",
        "NamedFrom<T, [&str]>",
        "NamedFrom<T, [AnyValue<'_>]>",
    ];

    // Problem: Vec<Option<T>> is not in the supported list
    let problematic_type = "Vec<Option<T>>";

    assert!(supported_types.len() >= 6);
    assert_eq!(problematic_type, "Vec<Option<T>>");

    // This suggests we need a different approach than Vec<Option<T>>
}

#[test]
fn test_series_construction_alternatives() {
    // TDD: This test documents alternative approaches for Series construction

    // Current failing pattern: Series::new(name, Vec<Option<T>>)
    // Need to find working patterns from the NamedFrom implementations

    let failing_pattern = "Series::new(name, Vec<Option<T>>)";
    let needs_alternative = true;

    assert_eq!(failing_pattern, "Series::new(name, Vec<Option<T>>)");
    assert!(needs_alternative);

    // Potential solutions:
    // 1. Use ChunkedArray instead of Vec<Option<T>>
    // 2. Use different Series constructor
    // 3. Convert Vec<Option<T>> to supported type
}

#[test]
fn test_convert_arrow_primitive_usage_pattern() {
    // TDD: This test documents where convert_arrow_primitive is still used

    // The function is still called from somewhere (line 180 error)
    // Need to identify if this function is still needed or can be removed

    let function_name = "convert_arrow_primitive";
    let has_remaining_usage = true;
    let line_with_error = 180;

    assert_eq!(function_name, "convert_arrow_primitive");
    assert!(has_remaining_usage);
    assert_eq!(line_with_error, 180);

    // Strategy: Check if function can be removed entirely, or fix the NamedFrom issue
}
