from os import getcwd
from os import path

from eventlet import tpool

from pycs.ApplicationStatus import ApplicationStatus
from pycs.pipeline.Job import Job
from pycs.pipeline.tf1.pipeline import Pipeline as TF1Pipeline


class PipelineManager:
    def __init__(self, app_status: ApplicationStatus):
        self.app_status = app_status
        app_status['projects'].subscribe(self.__update)

    def __update(self, data):
        # get current project path
        opened_projects = list(filter(lambda x: x['status'] == 'open', data))
        if len(opened_projects) == 0:
            return

        current_project = opened_projects[0]

        # find images to predict
        if 'data' not in current_project.keys() or len(current_project['data']) == 0:
            return

        # load pipeline
        pipeline = tpool.execute(self.__load_pipeline, current_project['pipeline']['model-distribution'])

        # create job list
        for d in current_project['data']:
            print('keys:', d.keys())
            if 'result' not in d.keys():
                # TODO update job progress
                job = Job('detect-faces', current_project['id'], d)
                result = tpool.execute(lambda p, j: p.execute(j), pipeline, job)
                d['result'] = result.predictions

        # close pipeline
        pipeline.close()

    def __load_pipeline(self, identifier):
        model_distribution = self.app_status['models'][identifier]

        if model_distribution['mode'] == 'tf1':
            model_root = path.join(getcwd(), 'models', model_distribution['name'])

            pipeline = TF1Pipeline()
            pipeline.load(model_root, model_distribution['pipeline'])

            return pipeline