"""Inspect compatible improvement in the supplied finite synthetic arena."""
from pathlib import Path
import sys
sys.path.insert(0, str(Path(__file__).resolve().parents[1] / 'src'))
import numpy as np
from infinite_players.arena import make_arena
from infinite_players.fidelity import policy_iteration, semantic_law, signature_residual


def main():
    mdp, anchor, targets = make_arena(seed=1, theta=1)
    descendant, value, audit = policy_iteration(mdp, targets, kind='path')
    source_value, _ = mdp.evaluate(anchor)
    path_tv = np.abs(semantic_law(mdp, anchor, 6) - semantic_law(mdp, descendant, 6)).sum()/2
    print(f'Normalized source value: {(1-mdp.gamma)*source_value.mean():.6f}')
    print(f'Normalized descendant value: {(1-mdp.gamma)*value.mean():.6f}')
    print(f'Six-step semantic TV: {path_tv:.3e}')
    print(f'Maximum signature residual: {signature_residual(mdp, descendant, targets):.3e}')
    print(f'Policy iteration steps: {audit["iterations"]}')
    print('Scope: one synthetic known-model arena; no human or commercial-game evaluation.')


if __name__ == '__main__':
    main()