from os import path
from uuid import uuid1

from pycs.observable import ObservableDict
from pycs.projects.MediaFile import MediaFile
from pycs.util.RecursiveDictionary import set_recursive


class Project(ObservableDict):
    def __init__(self, obj: dict, parent):
        # ensure all required object keys are available
        for key in ['data', 'labels', 'jobs']:
            if key not in obj.keys():
                obj[key] = {}

        # save data as MediaFile objects
        for key in obj['data'].keys():
            obj['data'][key] = MediaFile(obj['data'][key], self)

        # initialize super
        super().__init__(obj, parent)

        # subscribe to changes to write to disk afterwards
        self.subscribe(lambda d: self.parent.write_project(self['id']))

    def update_properties(self, update):
        set_recursive(update, self)

    def new_media_file_path(self):
        return path.join('projects', self['id'], 'data'), str(uuid1())

    def add_media_file(self, file):
        file = MediaFile(file, self)
        self['data'][file['id']] = file

    def remove_media_file(self, file_id):
        del self['data'][file_id]

    def add_label(self, name):
        label_uuid = str(uuid1())
        self['labels'][label_uuid] = {
            'id': label_uuid,
            'name': name
        }

    def update_label(self, identifier, name):
        if identifier in self['labels']:
            self['labels'][identifier]['name'] = name

    def remove_label(self, identifier):
        # abort if identifier is unknown
        if identifier not in self['labels']:
            return

        # remove label from data elements
        remove = list()

        for data in self['data']:
            for pred in self['data'][data]['predictionResults']:
                if 'label' in self['data'][data]['predictionResults'][pred]:
                    if self['data'][data]['predictionResults'][pred]['label'] == identifier:
                        remove.append((data, pred))

        for t in remove:
            del self['data'][t[0]]['predictionResults'][t[1]]

        # remove label from list
        del self['labels'][identifier]