import datetime
import sqlite3
import locale
import random
import hashlib
import uuid

from werkzeug.datastructures import Authorization
from models import User
locale.setlocale(locale.LC_TIME, "nl_NL.utf-8")



class Services:
    def __init__(self, db) -> None:        
        self.db = db
        self.cursor = self.db.cursor()
        self.PopulateDB()

    def GetAllServices(self):
        '''
        Get all services. Returns a dictionary with, for each key a tuple with (date, groups)
        '''
        serv = self.cursor.execute("select * from services").fetchall()
        res = {}
        for s in serv:
            date = datetime.datetime.strptime(s[1], "%Y-%m-%d %H:%M:%S")
            groups = s[2].split(":")
            res[s[0]] = (date, groups)
        return res

    def GetServices(self, number):
        serv = self.GetAllServices()
        res = {}
        for i in serv:
            if(number in serv[i][1]):
                res[i] = serv[i]
        return res

    def PopulateDB(self):
        '''
        Populate simple db
        '''
        query = f"""CREATE TABLE IF NOT EXISTS services 
        (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            date STRING UNIQUE,
            groups STRING
        );
        """
        self.cursor.execute(query)

    def AddService(self, date, groups):
        query = f"""
            INSERT INTO services (date, groups)
            VALUES('{date}', '{groups}');
        """
        try:
            self.cursor.execute(query)
            self.db.commit()
            return "Success"
        except:
            return "Service already exists?"

    def RemoveService(self, service):
        query = f"""
            DELETE FROM services 
            WHERE date == '{service}'
        """
        self.cursor.execute(query)
        self.db.commit()

class UserManager():
    def __init__(self, db) -> None:        
        self.db = db
        self.cursor = self.db.cursor()
        self.PopulateDB()

    def PopulateDB(self):
        '''
        Create db for user managment. Password is stored as a hash
        '''
        query = f"""CREATE TABLE IF NOT EXISTS users 
        (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            name STRING UNIQUE,
            password STRING,
            salt STRING
        );
        """
        self.cursor.execute(query)

    def AddUser(self, name, password):
        salt = uuid.uuid4().hex
        m = hashlib.sha512()
        m.update((password + salt).encode("utf-8"))
        password = m.digest().hex()
        query = f"""
            INSERT INTO users (name, password, salt)
            VALUES('{name}', '{password}', '{salt}');
        """
        self.cursor.execute(query)
        self.db.commit()

    def Authenticate(self, name, password):
        us = self.cursor.execute(f"select * from users where name == '{name}';").fetchall()
        if(us != None and len(us) > 0):
            us = us[0]
            m = hashlib.sha512()
            m.update((password + us[3]).encode("utf-8"))
            password = m.digest().hex()
            if(password == us[2]):
                return User(us[1], us[2], us[0], salt=us[3])
        return None

    def GetUserByID(self, id):
        us = self.cursor.execute(f"select * from users where id == {id};").fetchall()
        if(us != None):
            us = us[0]
            return User(us[1], us[2], us[0], salt=us[3])
        return None

if __name__ == "__main__":
    #fill db
    db = sqlite3.connect("sqlite.db", check_same_thread=False)
    ser = Services(db)
    us = UserManager(db)

    us.AddUser("Eljakim", "Kunnenwe?")
    us.Authenticate("Eljakim", "Kunnenwe?")
    us.Authenticate("Eljakim", "Kunnenwe2?")
    # for i in range(100):
    #     d = datetime.datetime.now()
    #     d = d.replace(hour=random.randint(1, 23), day = random.randint(1, 28), month = random.randint(1, 12))
    #     d = d.strftime("%Y-%m-%d %H:%M:%S")
    #     g = ""
    #     for j in range(10):
    #         g += str(random.randint(1, 30))
    #         g += ":"
    #     ser.AddService(d, g)
    # r = ser.GetAllServices()
    # d = ser.GetServices(str(4))
    # print(d)