#!/usr/bin/env python
# -*- coding: utf-8 -*-

import csv
import datetime
import os
import sys

from django.conf import settings
from django.core.management.base import BaseCommand
from django.db.models import Q

from ishtar_common.utils import get_log_time, get_percent, get_eta, BColors
from archaeological_finds.models_finds import Find, FindTreatment

log_path = os.sep.join([settings.ROOT_PATH, "logs"])
if not os.path.exists(log_path):
    os.mkdir(log_path, mode=0o770)


def write_output(base_lbl, idx, total, ref_time):
    lbl = f"\r{BColors.OKBLUE}[{get_percent(idx, total)}] {base_lbl} {idx + 1}/{total}"
    lbl += f" ({get_eta(idx, total, ref_time, datetime.datetime.now())} left){BColors.ENDC}"
    sys.stdout.write(lbl)
    sys.stdout.flush()


def migrate(log=True):
    errors = []
    changed = []
    if not quiet:
        sys.stdout.write(
            f"{BColors.OKGREEN}\r[{get_log_time()}] Set initial location for finds\n{BColors.ENDC}"
        )

    q = Find.objects.filter(Q(container__isnull=False) | Q(container_ref__isnull=False)).filter(
        container_fisrt_full_location=""
    )
    total = q.count()
    ref_time = datetime.datetime.now()
    base_lbl = "Migrate find"
    for idx, find in enumerate(q):
        if not quiet:
            write_output(base_lbl, idx, total, ref_time)
        if find.update_full_location():
            changed.append(("Find", str(find), find.pk))
            find.no_post_process()
            find.save()

    if not quiet:
        sys.stdout.write(
            f"\r{BColors.OKGREEN}[{get_log_time()}] Set initial location for packaging treatment\n{BColors.ENDC}"
        )
    q = FindTreatment.objects
    total = q.count()
    ref_time = datetime.datetime.now()
    base_lbl = "Migrate treatment"
    for idx, treatment in enumerate(q.all()):
        if not quiet:
            write_output(base_lbl, idx, total, ref_time)
        if treatment.generate_full_location():
            changed.append(("Treatment", "-", treatment.pk))
            treatment.save()


    if log and changed:
        filename = f"init_find_container_historic-{get_log_time().replace(':', '')}.csv"
        path = os.sep.join([log_path, filename])
        with open(path, "w+") as fle:
            writer = csv.writer(fle)
            writer.writerow(["model", "name", "id"])
            for change in changed:
                writer.writerow(change)
        if not quiet:
            sys.stdout.write(f"\n[{get_log_time()}] Log: {path} written\n")
    return errors


class Command(BaseCommand):
    help = "v4.2 - initialize find container historic"

    def add_arguments(self, parser):
        parser.add_argument(
            "--quiet", dest="quiet", action="store_true", help="Quiet output"
        )
        parser.add_argument(
            "--log", dest="log", action="store_false", help="Log into a file"
        )

    def handle(self, *args, **options):
        log = options["log"]
        global quiet
        quiet = options["quiet"]
        if not quiet:
            sys.stdout.write(f"{BColors.OKGREEN}[{get_log_time()}] Processing migration\n{BColors.ENDC}")
        settings.USE_BACKGROUND_TASK = False
        errors = migrate(log=log)
        if not errors:
            if not quiet:
                sys.stdout.write(f"{BColors.OKGREEN}[{get_log_time()}] Migration finished\n{BColors.ENDC}")
            sys.exit()
        if not quiet:
            sys.stdout.write("\n".join(errors))
        sys.exit(1)