"""Verification script to diagnose automatic state transitions.

This is meant to be run for verifying changes to the DS402 power state
machine code.  For each target state, it just lists the next
intermediate state which would be set automatically, depending on the
assumed current state.
"""

from canopen.objectdictionary import ObjectDictionary
from canopen.profiles.p402 import BaseNode402, State402


if __name__ == '__main__':
    n = BaseNode402(1, ObjectDictionary())

    for target_state in State402.SW_MASK:
        print('\n--- Target =', target_state, '---')
        for from_state in State402.SW_MASK:
            if target_state == from_state:
                continue
            if (from_state, target_state) in State402.TRANSITIONTABLE:
                print(f'direct:\t{from_state} -> {target_state}')
            else:
                next_state = State402.next_state_indirect(from_state)
                if not next_state:
                    print(f'FAIL:\t{from_state} -> {next_state}')
                else:
                    print(f'\t{from_state} -> {next_state} ...')

            try:
                while from_state != target_state:
                    n.tpdo_values[0x6041] = State402.SW_MASK[from_state][1]
                    next_state = n._next_state(target_state)
                    print(f'\t\t-> {next_state}')
                    from_state = next_state
            except ValueError:
                print('\t\t-> disallowed!')
