"""Research checks of conservation, causality, reconstruction and analytical limits."""
import sys,unittest,math
from pathlib import Path
sys.path.insert(0,str(Path(__file__).resolve().parents[1]/'src'))
import numpy as np
from genome import compile_target,evaluate,make_target
from local_growth import Config,simulate,diffusion_step
from theory import *
from functionality import conductance

class ModelChecks(unittest.TestCase):
    def test_closed_transport_mass_and_positive(self):
        rng=np.random.default_rng(42);c=rng.random((9,7,5));p=rng.uniform(.01,1,c.shape)
        after=diffusion_step(c,p,.3,.1)
        self.assertAlmostEqual(c.sum(),after.sum(),places=11)
        self.assertGreaterEqual(after.min(),c.min()-1e-14)
        self.assertLessEqual(after.max(),c.max()+1e-14)
    def test_nonperiodic_compilation_exact(self):
        a=np.random.default_rng(4).integers(0,3,(5,7,3));g,_=compile_target(a)
        xyz=np.moveaxis(np.indices(a.shape),0,-1)
        np.testing.assert_array_equal(evaluate(g,xyz),a)
    def test_noiseless_growth_and_local_counter_inheritance(self):
        g={'op':'braced_shell','n':5}
        cfg=Config(n=5,dim=3,steps=600,initial_error=0,birth=0,transduction_error=0,seed=3)
        r,a=simulate(g,cfg)
        self.assertEqual(r['material_fidelity'],1.)
        np.testing.assert_array_equal(a['counters'],np.moveaxis(np.indices((5,)*3),0,-1))
        self.assertLess(abs(r['mass_balance_residual']),1e-8)
    def test_seed_stops_inside_larger_vessel(self):
        g={'op':'paired_path','n':4}
        r,a=simulate(g,Config(n=7,dim=2,steps=300,seed=10))
        expected=np.zeros((7,7),bool);expected[:4,:4]=True
        np.testing.assert_array_equal(a['state']>0,expected)
    def test_last_operation_floor(self):
        self.assertAlmostEqual(raw_error(0,0,1,100,.03),.03)
        self.assertEqual(min_wait(.1,.01,.1,.02,.01),math.inf)
    def test_bound_controls_actual_tail(self):
        for b in [5,10,31,100,500]:
            for p in [.01,.06,.13]:
                self.assertLessEqual(exact_module_failure(b,.2,p),math.exp(-b*kl_bernoulli(.2,p))+1e-15)
    def test_closure_cycle_detected(self):
        self.assertEqual(topo_order(['grow','repair','close'],[('grow','repair'),('repair','close')]),['grow','repair','close'])
        with self.assertRaises(ValueError):topo_order(['a','b'],[('a','b'),('b','a')])
    def test_resistor_known_uniform_slab(self):
        # n parallel chains of n-1 unit resistances.
        self.assertAlmostEqual(conductance(np.full((7,7),2)),7/6,places=10)
    def test_common_mode_is_not_corrected_by_local_spec(self):
        g={'op':'paired_path','n':5}
        cfg=Config(n=5,dim=2,steps=800,initial_error=0,birth=0,
                   transduction_error=0,common_mode=1,seed=2)
        r,a=simulate(g,cfg)
        self.assertEqual(r['completed_fraction'],1.)
        self.assertLess(r['material_fidelity'],.1)

if __name__=='__main__':unittest.main(verbosity=2)