//! Quick utility to check Parquet file row count
use std::fs::File;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let args: Vec<String> = std::env::args().collect();
    let path = args.get(1).expect("Usage: check_parquet_rows <file.parquet>");
    
    let file = File::open(path)?;
    let builder = parquet::arrow::arrow_reader::ParquetRecordBatchReaderBuilder::try_new(file)?;
    let metadata = builder.metadata();
    
    let mut total_rows = 0;
    for i in 0..metadata.num_row_groups() {
        total_rows += metadata.row_group(i).num_rows();
    }
    
    println!("{} rows in {}", total_rows, path);
    println!("Minimum required: 120 rows (50 warmup + 60 lookback + 10 forecast)");
    if total_rows < 120 {
        println!("❌ INSUFFICIENT DATA");
    } else {
        println!("✅ Sufficient data");
    }
    Ok(())
}
