import os

from classes.User import User
from classes.Transaction import Tx
from helpers import BlockHelper as blockHelper
from helpers import TaskHelper as taskHelper
from helpers import UtilityHelper as utilityHelper

class bcolors:
    HEADER = '\033[95m'
    OKBLUE = '\033[94m'
    OKCYAN = '\033[96m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'
    BOLD = '\033[1m'
    UNDERLINE = '\033[4m'

class MenuHelper:
    def __init__(self, db):
        self.db = db
        self.user = None

        self.start_menu = {}
        self.user_main_menu = {}
        self.user_blockchain_menu = {}
        self.user_settings_menu = {}

        self.start_menu[0] = "Exit"
        self.start_menu[1] = "Explore the Blockchain"
        self.start_menu[2] = "Login"
        self.start_menu[3] = "Sign up"

        self.user_main_menu[0] = "Exit"
        self.user_main_menu[1] = "User Settings"
        self.user_main_menu[2] = "Blockchain"
        self.user_main_menu[3] = "Log out"

        self.user_blockchain_menu[0] = "Back"
        self.user_blockchain_menu[1] = "Explore the Blockchain"
        self.user_blockchain_menu[2] = "Transfer coins"
        self.user_blockchain_menu[3] = "Cancel transaction"
        self.user_blockchain_menu[4] = "Check balance"
        self.user_blockchain_menu[5] = "Check the pool"
        self.user_blockchain_menu[6] = "Mine a block"

        self.user_settings_menu[0] = "Back"
        self.user_settings_menu[1] = "View account info"
        self.user_settings_menu[2] = "Change username"
        self.user_settings_menu[3] = "Change password"
        self.user_settings_menu[4] = "DELETE ACCOUNT"

        self.opened_logs = False

    def printMenu(self, items):
        for key, value in items.items():
            print(f'{key} -- {value}')

    def runStartMenu(self):
        while(True):

            choice = self.getMenuInput(self.start_menu)
            if choice == None:
                continue

            # check if choice is in menu
            match self.start_menu[choice]:
                case "Exit":
                    print('Exiting system')
                    exit()

                case "Explore the Blockchain":
                    print("TODO")

                case "Login":
                    self.user = User(self.db)
                    logged_in = self.user.login()
                    self.clearScreen()
                    if logged_in:
                        print(f'Welcome {self.user.username}')
                        return
                    print("Login failed")
                    self.user = None

                case "Sign up":
                    self.user = User(self.db)
                    registered = self.user.register()
                    if registered:
                        print("Registration successful")
                        return
                    print("Registration failed")
                    self.user = None
                                          
                case _:
                    print("Wrong input, try again")

    def runUserMainMenu(self):
        while(self.user):

            choice = self.getMenuInput(self.user_main_menu)
            if choice == None:
                continue

            # check if choice is in menu
            match self.user_main_menu[choice]:
                case "Exit":
                    print('Exiting system')
                    exit()

                case "Log out":
                    self.user.logout()
                    self.user = None

                case "User Settings":
                    self.runUserSettingsMenu()

                case "Blockchain":
                    self.runUserBlockchainMenu()

                case _:
                    print("Wrong input, try again")

    def runUserBlockchainMenu(self):
        while(self.user):

            choice = self.getMenuInput(self.user_blockchain_menu)
            if choice == None:
                continue

            # check if choice is in menu
            match self.user_blockchain_menu[choice]:
                case "Back":
                    return

                case "Explore the Blockchain":
                    print("TODO")
                    block = blockHelper.loadBlock()
                    i = 0
                    for data in block.data:
                        
                        print(f"---------------------------------- Block {str(i)} ----------------------------------")
                        print(f"Block hash: {data.Inputs[0][1]}")
                        print(f"----------------------------------------------------------------------------------")
                        i += 1

                case "Transfer coins":
                    new_tx = taskHelper.transaction(self)
                    if new_tx.is_valid():
                        # TODO: add to pool
                        print("Transaction is valid")
                        utilityHelper.saveFile("../data/transaction_pool.dat", new_tx)
                        continue
                    print("Transaction is invalid")


                case "Cancel transaction":
                    print("TODO")

                case "Check balance":
                    print("TODO")

                case "Check the pool":
                    print("TODO")

                case "Mine a block":
                    print("TODO")

                case _:
                    print("Wrong input, try again")

    def runUserSettingsMenu(self):
        while(self.user):

            choice = self.getMenuInput(self.user_settings_menu)
            if choice == None:
                continue

            # check if choice is in menu
            match self.user_settings_menu[choice]:
                case "Back":
                    return
                
                case "View account info":
                    self.user.printAccountInfo()
                
                case "Change username":
                    self.user.updateAccount()

                case "Change password":
                    self.user.updatePassword()

                case "DELETE ACCOUNT":
                    if self.user.deleteAccount():
                        self.user = None

                case _:
                    print("Wrong input, try again")

    def getMenuInput(self, menu):
        self.printMenu(menu)
        # make input an interger
        try:
            choice = int(input())
        except:
            self.clearScreen()
            print("Wrong input, try again")
            return None
        self.clearScreen()

        return choice

    def clearScreen(self):
        os.system('cls' if os.name == 'nt' else 'clear')