import json
from distutils.util import strtobool
import geopy.distance
import time
import configparser
import csv


def filter_buildings(overpass_json):
    # Functie voor het filteren van alle beschikbare elementen naar gebouwen
    buildings = []
    for i in overpass_json['elements']:
        if 'building' in i['tags']:
            building_corner_ids = []
            for j in i['nodes']:
                building_corner_ids.append(j)
            buildings.append(building_corner_ids)
    return buildings


def filter_building_types(overpass_json):
    # Functie voor het filteren van alle beschikbare elementen naar gebouwen
    building_types = []
    for i in overpass_json['elements']:
        if 'building' in i['tags']:
            building_types.append(i['tags']['building'])
    return building_types


def filter_nodes(overpass_json):
    # Functie voor het filteren van alle beschikbare elementen naar nodes
    nodes = {}
    for i in overpass_json['elements']:
        if i['type'] == 'node':
            nodes[i["id"]] = (i['lon'], i['lat'])
    return nodes


def get_building_coords(nodes_list, requested_building, buildingnr):
    # Functie voor het ophalen van de coordinaten van de gefilterde gebouwen
    building_coords = {}
    coords = []
    for i in requested_building:
        if i in nodes_list:
            coords.append(nodes_list[i])
    building_coords[buildingnr] = coords
    return building_coords


def sq_filter(unfiltered_building_coords, building_id):
    # Functie voor het filteren van een gecompliceerd gebouw naar een simpel vierkant.
    new_coordinates = {}
    coords_list = []
    lon_list = []
    lat_list = []
    for i in unfiltered_building_coords:
        lon_list.append(i[0])
        lat_list.append(i[1])
    max_lon = max(lon_list)
    min_lon = min(lon_list)
    max_lat = max(lat_list)
    min_lat = min(lat_list)
    coords_list.append((max_lon, (lat_list[lon_list.index(max_lon)])))
    coords_list.append(((lon_list[lat_list.index(max_lat)]), max_lat))
    coords_list.append((min_lon, (lat_list[lon_list.index(min_lon)])))
    coords_list.append(((lon_list[lat_list.index(min_lat)]), min_lat))
    new_coordinates[building_id] = coords_list
    return new_coordinates


def plot_building(building, building_id):
    # Functie voor het plotten van de lengtes van de zijden van het gebouw
    building_edge_lengths = {}
    distance = []
    coords_1 = 0
    coords_3 = ""
    length_building = len(building)
    for count, i in enumerate(building):
        if coords_1 == 0:
            coords_1 = i
            coords_3 = i
        elif count == (length_building - 1):
            coords_2 = i
            distance.append(geopy.distance.distance(coords_1, coords_2).meters)
            distance.append(geopy.distance.distance(coords_3, coords_2).meters)
        else:
            coords_2 = i
            distance.append(geopy.distance.distance(coords_1, coords_2).meters)
            coords_1 = coords_2

    building_edge_lengths[building_id] = distance
    return building_edge_lengths


config = configparser.ConfigParser()
config.read('config.ini')
timestr = time.strftime("%Y%m%d-%H%M%S")
lower_length = float(input("aantal meter benedenwaarde: ") or config['ANALYZER']['lower_length'])
higher_length = float(input("aantal meter bovenwaarde: ") or config['ANALYZER']['higher_length'])
squaremode = bool(strtobool(input("Gebruik square mode: ") or config['ANALYZER']['squaremode']))
resultfile = ''

if squaremode is True:
    resultfile = 'osm_file_analysis_' + timestr + '_sq.csv'
elif squaremode is False:
    resultfile = 'osm_file_analysis_' + timestr + '.csv'

with open(config['SHARED']['basepath'] + config['SHARED']['json_file']) as f:
    json_file = json.load(f)

# Filter de Json File naar de belangrijke elementen
all_nodes = filter_nodes(json_file)
all_buildings = filter_buildings(json_file)
all_buildings_types = filter_building_types(json_file)

# Bereken de lengtes
x = 0
building_lengths_filtered = {}
with open(resultfile, mode='x') as csv_file:
    csv_writer = csv.writer(csv_file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
    csv_writer.writerow(['id', 'type', 'google maps', 'openstreetmaps', 'afmetingen afgerond', 'afmetingen'])
    for single_building in all_buildings:
        building_coordinates = get_building_coords(all_nodes, single_building, x)
        if squaremode is True:
            # Filter de volledige set coordinaten naar: Kleinste X, Grootste Y, Grootste X, Kleinste Y
            if not building_coordinates[x]:
                pass
            else:
                building_coordinates = sq_filter(building_coordinates[x], x)
        elif squaremode is False:
            pass
        # Haal het gebouwtype op
        building_type = all_buildings_types[x]
        for z in building_coordinates:
            building_lengths = plot_building(building_coordinates[z], x)
            # Filter de lengtes weg
            skip = False
            for single_length in building_lengths[x]:
                if skip is True:
                    break
                if single_length >= lower_length:
                    if single_length <= higher_length:
                        csv_writer.writerow([str(x),
                                             str(building_type),
                                             'http://www.google.com/maps/place/' + str(
                                                 building_coordinates[x][0][1]) + ',' + str(
                                                 building_coordinates[x][0][0]),
                                             'http://www.openstreetmap.com/node/' + str(
                                                 single_building[0]),
                                             str([round(y, 2) for y in building_lengths[x]]).strip('[]'),
                                             str(building_lengths[x]).strip('[]')
                                             ])
                        skip = True
        x = x + 1