import base64
import os
import rsa
from datetime import date
import secrets
import string
import requests
import json
from dotenv import load_dotenv
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
import time
from bs4 import BeautifulSoup
import csv

def generate_token_id(length):
    characters = string.ascii_letters + string.digits # + string.punctuation
    token = ''.join(secrets.choice(characters) for _ in range(length))
    return token

# Examples for what will be generated
# 5!bA9H2f1q^...
# Xe7uM$4d9@...
# &3yTb1*8Z#...
# %pWqN7!6zX...
# @9oV!s6Rd2...

def get_today_date():
    today = date.today()
    return str(today)

# Example for what will be returned
# 2023-06-29

def get_request(get_url, params):
    # get_url = 'http://ipygg-api-test-env.ap-east-1.elasticbeanstalk.com/SBT'

    pubkey_path = os.path.join(os.path.dirname(__file__), '..', 'pubkey.pem')

    with open(pubkey_path, 'rb') as f:
        pubKey = rsa.PublicKey.load_pkcs1(f.read())

    for key, value in params.items():
        value_bytes = value.encode("utf-8")
        encrypted_value = rsa.encrypt(value_bytes, pubKey)
        encoded_value = base64.b64encode(encrypted_value)
        params[key] = encoded_value

    # Write the encrypted and encoded values to a file
    with open("sbt_request.txt", "w") as f:
        for key, value in params.items():
            f.write(f"{key}: {value}\n\n")
            
    # posting Json file to api
    r = requests.get(get_url, params=params)# extracting data in json format
    data = r.json()
    print(f'get request: {data}')


def post_request(post_url, data):
    # post_url = 'http://ipygg-api-test-env.ap-east-1.elasticbeanstalk.com/SBT'

    pubkey_path = os.path.join(os.path.dirname(__file__), '..', 'pubkey.pem')

    with open(pubkey_path, 'rb') as f:
        pubKey = rsa.PublicKey.load_pkcs1(f.read())

    for key, value in data.items():
        value_bytes = value.encode("utf-8")
        encrypted_value = rsa.encrypt(value_bytes, pubKey)
        encoded_value = base64.b64encode(encrypted_value)
        data[key] = encoded_value

    # Write the encrypted and encoded values to a file
    with open("sbt_request.txt", "w") as f:
        for key, value in data.items():
            f.write(f"{key}: {value}\n\n")
            
    # posting Json file to api
    r = requests.post(post_url, data=data)
    print(f'post request: {r.json}')


def search_on_engine(search_data):
    # clearing csv file data
    csv_filename = "search_result.csv"
    f = open(csv_filename, "w+") # opening the file with w+ mode truncates the file
    # writer.writeheader()
    f.close()
    # set up driver
    driver = webdriver.Chrome()
    load_dotenv()
    search_url = os.environ.get("search-engine-url")
    driver.get(search_url)
    # assert "Python" in driver.title

    for search_tag_key in search_data:
        search_tag = search_data[search_tag_key]
        # Searching search tag in query
        elem = driver.find_element(By.NAME, "query")
        elem.clear()
        elem.send_keys(search_tag)
        submit_elem = driver.find_element(By.ID, "submit")
        submit_elem.click()
        time.sleep(8) # delay for 10 seconds: 2 seconds for Yahoo! search, 6 seconds for Google search
        assert "No results found." not in driver.page_source

        # extract link from page
        html = driver.page_source # search url remains the same after searching
        # time.sleep(10) # delay for 10 seconds: 2 seconds for Yahoo! search, 6 seconds for Google search
        soup = BeautifulSoup(html, 'html.parser')
        result_links = []
        for link in soup.find_all('a'):
            result_links.append(link.get('href'))
            # print(link.get('href'))

        # store in csv
        result_dict = {
            "tag": search_tag,
            "results": result_links
        }

        with open(csv_filename, 'a', encoding='UTF8', newline='') as f:
            # writer = csv.writer(f)
            writer = csv.DictWriter(f, fieldnames=["tag","results"])
            writer.writerow(result_dict)

    # save the link to db
    # post_request("post_url", result_link)


def get_data_link(chinese_name, english_name, address):
    

    # get phone number from db
    # phone_no = get_request(get_url, english_name)
    phone_no = '12345678'
    # create data set
    search_data = {
        "chi_name": chinese_name,
        "eng_name": english_name,
        "address": address,
        "phone_number": phone_no
    }
    # pass data to search engine
    result_link = search_on_engine(search_data)
    # show the link
    # return result_link

# get_data_link('劉柏政','Lau, Pak Ching','FLT 1939 18/F KM WAN HSE, CHOIHUNG EST 1 HUNG MUI AVENUE, NGAU CHI WAN KLN')
# search_on_engine('Lau, Pak Ching')