from glob import glob
from json import load, dump
from os import path, mkdir
from shutil import rmtree
from time import time
from uuid import uuid1

from pycs import ApplicationStatus


class ProjectManager:
    def __init__(self, app_status: ApplicationStatus):
        # TODO create projects folder if it does not exist

        # find projects
        for folder in glob('projects/*'):
            # load project.json
            with open(path.join(folder, 'project.json'), 'r') as file:
                project = load(file)
                project['status'] = 'close'

                app_status['projects'].append(project)

        # subscribe to changes
        app_status['projects'].subscribe(self.update)

    def update(self, data):
        # detect project to create
        for i in range(len(data)):
            if data[i]['status'] == 'create':
                # create dict representation
                uuid = str(uuid1())

                data[i] = {
                    'id': uuid,
                    'status': 'close',
                    'name': data[i]['name'],
                    'description': data[i]['description'],
                    'created': int(time()),
                    'access': 0,
                    'pipeline': {
                        'model-distribution': data[i]['model']
                    }
                }

                # create project directory
                folder = path.join('projects', uuid)
                mkdir(folder)

                # create project.json
                with open(path.join(folder, 'project.json'), 'w') as file:
                    dump(data[i], file, indent=4)

        # detect project to load
        to_load = list(filter(lambda x: x['status'] == 'load', data))
        for project in to_load:
            # TODO actually load pipeline
            project['status'] = 'open'
            project['access'] = int(time())

        # detect project to update
        for i in range(len(data)):
            if 'action' in data[i] and data[i]['action'] == 'update':
                del data[i]['action']

                prj = data[i].copy()
                del prj['status']

                with open(path.join('projects', data[i]['id'], 'project.json'), 'w') as file:
                    dump(prj, file, indent=4)

        # detect project to delete
        for i in range(len(data)):
            if 'action' in data[i] and data[i]['action'] == 'delete':
                folder = path.join('projects', data[i]['id'])

                del data[i]
                rmtree(folder)

                break