#!/usr/bin/env python3
''' This is a program to get a url from Google ee api based on supplied region'''

import logging
import stat
import os
from os.path import exists

import ee
import sys
import argparse
import time
import pycountry
from country_bounding_boxes import country_subunits_by_iso_code
from country_iso2ify import get_resolver

resolver = get_resolver()

def list_subunits_and_exit(country_name):
    iso_code = resolver.resolve(country_name)
    countries = country_subunits_by_iso_code(iso_code)
    logging.debug("Country is [{}] iso code is [{}]".format(country_name,iso_code))
    item = None
    if countries:
        for item in countries:
            print("Subunit of [{}]: [{}]".format(country_name,item.subunit))
    sys.exit(0)


def get_mainland_bbox(country_name, region_name):
    # Returns the main continental/primary bounding box
    iso_code = resolver.resolve(country_name)
    countries = country_subunits_by_iso_code(iso_code)
    logging.debug("Country is [{}] iso code is [{}]".format(country_name,iso_code))
    # The library is designed to return the main body of the country
    # in the first result or by filtering for largest area.
    item = None
    if countries:
        for item in countries:
            logging.debug(item.subunit+str(item.bbox))
    item = None
    countries = country_subunits_by_iso_code(iso_code)
    if countries and region_name == 'None':
        for item in countries:
            if item.subunit == country_name:
                return item.bbox
    else:
        if countries:
            for item in countries:
                if item.subunit == region_name:
                    return item.bbox
    return None

class Timerlog:

    def __init__(self, name):
        self.time_start = 0.0
        self.time_end = 0.0
        self.name = name

    def start(self):
        self.time_start = time.perf_counter()
        return self

    def end(self):
        self.time_end = time.perf_counter()
        return self

    def report(self, duration_only=False):
        if duration_only:
            return "Timer [{}] duration [{:.5f}]".format(
                self.name, self.time_end - self.time_start)
        return "Timer [{}] begin [{:.5f}] end [{:.5f}] duration [{:.9f}]".format(
            self.name, self.time_start, self.time_end, self.time_end - self.time_start)

program_name = 'get_ee_from_region.py'

parser = argparse.ArgumentParser(
    prog=program_name,
    description='get a url from google ee api based on supplied region, optionally list subregions of a country',
    epilog='Good luck')

parser.add_argument(
    "-l",
    "--logging",
    dest='logging',
    metavar='log_file',
    required=False,
    action='store',
    help="log to file")

parser.add_argument(
    "-L",
    "--list-subunits",
    dest='list_subunits',
    action='count',
    default=0,
    required=False,
    help="list country subunits and exit")

parser.add_argument(
    "-v",
    "--verbose",
    dest='verbose',
    default=True,
    required=False,
    action='store_true',
    help="verbose mode, log output goes to stderr")

parser.add_argument(
    "-c",
    "--country",
    dest='country',
    metavar='country',
    default='United States',
    action='store',
    help="country to get topo image for")

parser.add_argument(
    "-r",
    "--region",
    dest='region',
    metavar='region',
    default='None',
    action='store',
    help="subregion to get, default is to get entire country")

args = parser.parse_args()


if args.logging or args.verbose:
    handlers = []
    if args.logging:
        file_handler = logging.FileHandler(filename=args.logging)
        handlers.append(file_handler)
    if args.verbose:
        stderr_handler = logging.StreamHandler(stream=sys.stderr)
        handlers.append(stderr_handler)
    logging.basicConfig(
        encoding='utf-8',
        handlers=handlers,
        format='%(asctime)s.%(msecs)03d %(levelname)s {%(module)s} [%(funcName)s] %(message)s',
        datefmt='%Y-%m-%d,%H:%M:%S',
        level=logging.DEBUG)
    if args.logging:
        logging.debug('logging to log_file requested')
    if args.verbose:
        logging.debug('logging to stderr requested')

logging.debug('list_subunits is [{}]'.format(args.list_subunits))

if args.list_subunits > 0:
    list_subunits_and_exit(args.country)


t = Timerlog("atomic test").start()
logging.debug(t.end().report())

logging.debug("Country is [{}]".format(args.country))
logging.debug("Region is [{}]".format(args.region))

iso_code = resolver.resolve(args.country)
logging.debug("iso_code for [{}] is [{}]".format(args.country, iso_code))

bbox=get_mainland_bbox(args.country, args.region)
logging.debug("BBOX is [{}]".format(bbox))

#ee.Geometry.BBox(w,s,e,n)
b_list = list(bbox)
logging.debug("BBOX as list is {}".format(b_list))