import csv
import sys

# Define the expected number of columns
EXPECTED_COLUMNS = 5

# Input CSV file
if len(sys.argv) != 2:
    print("Usage: python validate_csv.py <csv_file>")
    sys.exit(1)

CSV_FILE = sys.argv[1]

# Check if the file exists
try:
    with open(CSV_FILE, 'r') as file:
        reader = csv.reader(file)
        for line_number, row in enumerate(reader, start=1):
            if len(row) != EXPECTED_COLUMNS:
                print(f"Error: Line {line_number} has {len(row)} columns (expected {EXPECTED_COLUMNS}).")
                sys.exit(1)
except FileNotFoundError:
    print(f"Error: File '{CSV_FILE}' not found.")
    sys.exit(1)

print(f"Validation passed: All rows have {EXPECTED_COLUMNS} columns.")