#!/usr/bin/env python3
"""Planning arithmetic only: no model loading, hardware emulation or speed claims."""
import argparse
import json
import math
from pathlib import Path


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('--checkpoint-gib', type=float, default=123.568)
    args = parser.parse_args()
    if not math.isfinite(args.checkpoint_gib) or args.checkpoint_gib <= 0:
        parser.error('--checkpoint-gib must be finite and positive')
    cfg = json.loads((Path(__file__).resolve().parents[1] / 'configs/target.json').read_text())
    combined = cfg['inference_vram_budget_gib'] + cfg['process_tree_and_page_cache_budget_gib']
    print(json.dumps({
        'status': 'planning_arithmetic_only',
        'checkpoint_gib': args.checkpoint_gib,
        'combined_runtime_budget_gib': combined,
        'optimistic_nonresident_checkpoint_gib': round(max(0, args.checkpoint_gib - combined), 3),
        'warning': 'Budgets include runtime overhead. File size is not runtime size. No loadability or speed prediction.',
        'hardware_test_executed': False
    }, ensure_ascii=False, indent=2))


if __name__ == '__main__':
    main()