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import pytest
import itertools
import copy
from Tensile.Properties import Predicate
from Tensile.SolutionLibrary import PredicateLibrary


def test_perf_metric_predicate_comparison():
    cu = Predicate('CUEfficiency')
    dv = Predicate('TruePred')

    assert cu < dv
    assert not dv < cu

def perf_metric_library_objects_order():
    objs = [PredicateLibrary('Problem', [{'predicate': Predicate('CUEfficiency')}]),
            PredicateLibrary('Problem', [{'predicate': Predicate('TruePred')}])
    ]

    return [copy.deepcopy(libs) for libs in itertools.permutations(objs)]

@pytest.mark.parametrize("libraries", perf_metric_library_objects_order())
def test_perf_metric_library_merge_order(libraries):
    lib = libraries[0]
    for lib2 in libraries[1:]:
        lib.merge(lib2)

    assert lib.rows[0]['predicate'] == Predicate('CUEfficiency')
    assert lib.rows[1]['predicate'] == Predicate('TruePred')

def perf_metric_library_objects_dups():
    objs = [PredicateLibrary('Problem', [{'predicate': Predicate('CUEfficiency'), 'library': PredicateLibrary()}]),
            PredicateLibrary('Problem', [{'predicate': Predicate('CUEfficiency'), 'library': PredicateLibrary()}]),
            PredicateLibrary('Problem', [{'predicate': Predicate('TruePred'),     'library': PredicateLibrary()}]),
            PredicateLibrary('Problem', [{'predicate': Predicate('TruePred'),     'library': PredicateLibrary()}])
    ]

    return [copy.deepcopy(libs) for libs in itertools.permutations(objs)]

@pytest.mark.parametrize("libraries", perf_metric_library_objects_dups())
def test_perf_metric_library_merge_dups(libraries):
    lib = libraries[0]
    for lib2 in libraries[1:]:
        lib.merge(lib2)

    assert len(lib.rows) == 2

    def getPred(row):
        return row['predicate']
    rowPreds = map(getPred, lib.rows)

    assert Predicate('CUEfficiency') in rowPreds
    assert Predicate('TruePred') in rowPreds