from . import matchers
from . import readers
from . import evaluators
from . import extractors

def load_component(compo_name,model_name,config):
    if compo_name=='extractor':
        component=load_extractor(model_name,config)
    elif compo_name=='reader':
        component=load_reader(model_name,config)
    elif compo_name=='matcher':
        component=load_matcher(model_name,config)
    elif compo_name=='evaluator':
        component=load_evaluator(model_name,config)
    else:
        raise NotImplementedError
    return component


def load_extractor(model_name,config):
    if model_name=='root':
        extractor =extractors.ExtractSIFT(config)
    elif model_name=='sp':
        extractor=extractors.ExtractSuperpoint(config)
    else:
        raise NotImplementedError
    return extractor

def load_matcher(model_name,config):
    if model_name=='SGM':
        matcher=matchers.GNN_Matcher(config,'SGM')
    elif model_name=='SG':
        matcher=matchers.GNN_Matcher(config,'SG')
    elif model_name=='NN':
        matcher=matchers.NN_Matcher(config)
    else:
        raise NotImplementedError
    return matcher

def load_reader(model_name,config):
    if model_name=='standard':
        reader=readers.standard_reader(config)
    else:
        raise NotImplementedError
    return reader

def load_evaluator(model_name,config):
    if model_name=='AUC':
        evaluator=evaluators.auc_eval(config)
    elif model_name=='FM':
        evaluator=evaluators.FMbench_eval(config)
    return evaluator