from __future__ import absolute_import

from celery.task import Task

from common.models import *

from utils.Logger import setupLogger
from django.conf import settings
import subprocess

import os

'''
    Gets the folder path and the plan id
    it makes an analysis of the calibrated images (in folder "calibrated")
'''

class Analysis(Task):

    logger = setupLogger("analysis", "analysis")

    def log(self, message: str) -> int:
        if settings.DEBUG:
            self.logger.info(message)
        return 0

    def logDB(self, message: str) -> int:
        Log.objects.create(agent='Analyzer', message=message)
        return 0

    def execProcess(self, command: str) -> int:
        self.process = subprocess.Popen(command, shell=True)
        return 0

    def start(self, plan_id: int, folder: str) -> int:
        self.plan_id = plan_id
        self.folder = folder
        self.path_dir_file = os.path.dirname(os.path.realpath(__file__))
        try:
            self.plan = Plan.objects.get(id=self.plan_id)
        except:
            self.log("analysis not found")
            self.logDB(message="Plan with id %d not found"%(self.plan_id))
            return 1
        self.dir_name = self.folder + os.sep + self.plan.name + "_" + str(self.plan_id) + os.sep + "analysis"
        self.plan_folder = self.plan.name + "_" + str(self.plan_id)
        if self.createDirectory():
            self.log("analysis err dir")
            self.logDB(message="Could not create the directory for analysis")
            return 1
        self.log("analysis start")
        return self.logDB("Starting analysis for plan " + self.plan.name)

    def createDirectory(self):
        try:
            if not os.path.isdir(self.dir_name):
                os.makedirs(self.dir_name)
        except:
            return 1
        return 0

    def changeDirectory(self, path: str):
        os.chdir(path)
        return 0

    def execute(self) -> int:
        self.changeDirectory(self.path_dir_file)

        return self.execProcess("./analyzer '"+str(self.folder)+"' '"+self.plan_folder+"' '"+str(self.plan.duration) + "'")

    def end(self) -> int:
        self.process.wait()
        if self.process.returncode == 0:
            self.log("analysis executed")
            self.logDB(message="Analysis executed successfully for plan " + str(self.plan.name))
        else:
            self.log("analysis failed")
            self.logDB(message="Could not make an analysis for plan " + str(self.plan.name))
        return self.process.returncode

    def run(self, plan_id, folder):
        if self.start(plan_id, folder):
            return 1
        self.execute()
        self.end()
        return 0