import os

def generate_dense_json(output_path="note_5mb.json", target_mb=5.0):
    target_bytes = int(target_mb * 1024 * 1024)

    with open(output_path, "w", encoding="utf-8") as f:
        f.write("{\n")
        bytes_written = 2
        i = 0
        while bytes_written < target_bytes - 128:
            entry = f'  "item_{i}": {{"id": {i}}},\n'
            f.write(entry)
            bytes_written += len(entry.encode("utf-8"))
            i += 1
        final_entry = f'  "item_{i}": {{"id": {i}}}\n'
        f.write(final_entry)
        f.write("}\n")

    actual_size = os.path.getsize(output_path)
    print(f"File created: {output_path}")
    print(f"Number of objects: {i + 1}")
    print(f"Final size: {actual_size:,} bytes ({actual_size / (1024 * 1024):.2f} MB)")

if __name__ == "__main__":
    generate_dense_json()