#!/usr/bin/env python3
import os
import sys
from typing import List

import numpy
import numpy as np
import pandas as pd
import scipy.cluster.hierarchy as sc
from matplotlib import pyplot as plt
from numpy import ndarray
from pandas import Series
from sklearn.cluster import AgglomerativeClustering
from sklearn.decomposition import PCA

from src.main.df_loader import DfLoader
from src.main.georeverse import Georeverse

is_plots: bool = False
default_clusters: int = 3
georeverse: Georeverse = Georeverse()


def __plots(data: ndarray, labels: ndarray) -> None:
    plt.figure(figsize=(12, 6))
    plt.subplot(1, 2, 1)
    sc.dendrogram(sc.linkage(data, method='ward'), p=4, truncate_mode='level')
    plt.title('Dendrogram')
    pca = PCA(n_components=2)
    transformed = pd.DataFrame(pca.fit_transform(data)).to_numpy()
    plt.subplot(1, 2, 2)
    plt.scatter(x=transformed[:, 0], y=transformed[:, 1], c=labels, cmap='rainbow')
    plt.title('Clustering')
    plt.show()


def __get_cluster_centers(data: ndarray, labels: ndarray) -> ndarray:
    centers: List[List[float]] = list()
    for label in set(labels):
        center: Series = data[numpy.where(labels[:] == label)].mean(axis=0)
        centers.append(list(center))
    return np.array(centers)


def __print_center(center: ndarray) -> None:
    location: str = georeverse.get_city(center[0], center[1])
    sex = round(center[2])
    age = round(center[3])
    is_university = bool(round(center[4]))
    is_work = bool(round(center[5]))
    is_student = bool(round(center[6]))
    is_schoolboy = bool(round(center[7]))
    print(f'location: {location}, sex: {sex}, age: {age},'
          f' univer: {is_university}, work: {is_work}, student: {is_student}, school: {is_schoolboy}')


def __clustering(data: ndarray, n_clusters: int = 3, plots: bool = False) -> None:
    model = AgglomerativeClustering(n_clusters=n_clusters, metric='euclidean', linkage='ward')
    model.fit(data)
    labels = model.labels_
    if plots:
        __plots(data, labels)
    centers = __get_cluster_centers(data, labels)
    for center in centers:
        __print_center(center)


def __main(json_file):
    data: ndarray = DfLoader(json_file).get_data()
    __clustering(data, default_clusters, is_plots)


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print('You must specify the raw_dataset json file')
        exit(1)
    if not os.path.isfile(sys.argv[1]):
        print(f'File {sys.argv[1]} is not exists')
    __main(sys.argv[1])