# -*- coding: utf-8 -*-
"""A job layer may spell its role map flat ('panel.design_number: X');
`_nest_dotted_parameters` folds it into the nested tree `param_names`
walks, and the flat (later-layer) value beats a nested None placeholder."""
from vibe import knowledge


def test_flat_keys_fold_into_the_nested_tree():
    merged = {'parameters': {'panel.design_number': 'DESIGN_NO_PARAM',
                             'sheet.fc': 'FC_PARAM'}}
    knowledge._nest_dotted_parameters(merged)
    assert merged['parameters'] == {'panel': {'design_number': 'DESIGN_NO_PARAM'},
                                    'sheet': {'fc': 'FC_PARAM'}}
    assert knowledge.param_names(merged, 'panel.design_number') == ['DESIGN_NO_PARAM']


def test_flat_value_overwrites_a_nested_placeholder():
    merged = {'parameters': {'panel': {'design_number': None, 'length': 'LENGTH_PARAM'},
                             'panel.design_number': 'DESIGN_NO_PARAM'}}
    knowledge._nest_dotted_parameters(merged)
    assert merged['parameters']['panel'] == {'design_number': 'DESIGN_NO_PARAM',
                                             'length': 'LENGTH_PARAM'}
    assert 'panel.design_number' not in merged['parameters']


def test_nested_only_tree_is_untouched():
    merged = {'parameters': {'panel': {'design_number': 'D'}, 'not_applicable': ['x']}}
    before = {'panel': {'design_number': 'D'}, 'not_applicable': ['x']}
    knowledge._nest_dotted_parameters(merged)
    assert merged['parameters'] == before


def test_no_parameters_or_odd_shapes_never_raise():
    for merged in ({}, {'parameters': None}, {'parameters': 'x'},
                   {'parameters': {'panel': 'flat-string', 'panel.design_number': 'D'}}):
        knowledge._nest_dotted_parameters(merged)
    assert merged['parameters']['panel'] == {'design_number': 'D'}