import base64
import hashlib
from pathlib import Path

import bcrypt
import numpy as np
from secrets import choice
from string import ascii_lowercase
from docs.scripts.utils import render_markdown_template, emojis
from src.models import NKodePolicy, KeypadSize
from src.nkode_api import NKodeAPI
from src.user_cipher import UserCipher
from src.utils import select_keys_with_passcode_values

def display_keypad(icons_array: np.ndarray, props_per_key: int) -> str:
    icons = ""
    for idx, row in enumerate(icons_array.reshape(-1, props_per_key)):
        icons += f"Key {idx}: "
        icons += str(row)
        icons += "\n"
    return icons

if __name__ == "__main__":
    api = NKodeAPI()

    policy = NKodePolicy(
        max_nkode_len=10,
        min_nkode_len=4,
        distinct_positions=0,
        distinct_properties=4,
    )
    keypad_size = KeypadSize(
        numb_of_keys=6,
        props_per_key=9
    )
    customer_id = api.create_new_customer(keypad_size, policy)
    customer = api.get_customer(customer_id)
    username = "test_username" + "".join([choice(ascii_lowercase) for _ in range(6)])
    signup_session_id, set_signup_keypad = api.generate_signup_keypad(customer_id, username)
    ordered_set_icons = emojis[set_signup_keypad]
    passcode_len = 4
    passcode_property_indices = np.random.choice(set_signup_keypad.reshape(-1), size=passcode_len,
                                                 replace=False).tolist()
    selected_keys_set = select_keys_with_passcode_values(passcode_property_indices, set_signup_keypad,
                                                         keypad_size.numb_of_keys)
    confirm_keypad = api.set_nkode(customer_id, selected_keys_set, signup_session_id)
    selected_keys_confirm = select_keys_with_passcode_values(passcode_property_indices, confirm_keypad,
                                                             keypad_size.numb_of_keys)
    ordered_confirm_icons = emojis[confirm_keypad]
    success = api.confirm_nkode(customer_id, selected_keys_confirm, signup_session_id)
    user = api.customers[customer_id].users[username]
    combined_prop_key = user.cipher.property_key ^ customer.cipher.property_key
    user_passcode = combined_prop_key[passcode_property_indices]
    pad_len = customer.nkode_policy.max_nkode_len - passcode_len
    padded_passcode = np.concatenate((user_passcode, np.zeros(pad_len, dtype=user_passcode.dtype)))
    ciphered_passcode = padded_passcode ^ user.cipher.pass_key
    passcode_prehash = base64.b64encode(hashlib.sha256(ciphered_passcode.tobytes()).digest())
    passcode_hash = bcrypt.hashpw(passcode_prehash, bcrypt.gensalt(rounds=12)).decode("utf-8")

    padded_passcode_position_indices = customer.cipher.get_passcode_position_indices_padded(
        list(passcode_property_indices), customer.nkode_policy.max_nkode_len)
    user_position_key = user.cipher.combined_position_key ^ customer.cipher.position_key
    ordered_user_position_key = user_position_key[padded_passcode_position_indices]
    mask = ordered_user_position_key ^ user.cipher.mask_key
    encoded_mask = user.cipher.encode_base64_str(mask)
    login_keypad = api.get_login_keypad(username, customer_id)
    selected_keys_login = select_keys_with_passcode_values(passcode_property_indices, login_keypad,
                                                           keypad_size.props_per_key)

    old_props = customer.cipher.property_key.copy()
    old_pos = customer.cipher.position_key.copy()
    customer.cipher.property_key = np.random.choice(2 ** 16, size=keypad_size.total_props, replace=False)
    customer.cipher.position_key = np.random.choice(2 ** 16, size=keypad_size.props_per_key, replace=False)
    new_props = customer.cipher.property_key
    new_pos = customer.cipher.position_key
    props_xor = new_props ^ old_props
    pos_xor = new_pos ^ old_pos
    user = customer.users[username]
    new_user_cipher = UserCipher.create(keypad_size, customer.cipher.position_key, policy.max_nkode_len)
    context = {
        "max_nkode_len": policy.max_nkode_len,
        "numb_of_keys": keypad_size.numb_of_keys,
        "props_per_key": keypad_size.props_per_key,
        "customer_property_key": customer.cipher.property_key,
        "customer_position_key": customer.cipher.position_key,
        "user_property_key": user.cipher.property_key,
        "pass_key": user.cipher.pass_key,
        "combined_position_key": user.cipher.combined_position_key,
        "user_position_key": user_position_key,
        "mask_key": user.cipher.mask_key,
        "user_passcode_idxs": passcode_property_indices,
        "combined_property_key": combined_prop_key,
        "user_passcode_props": user_passcode,
        "padded_passcode": padded_passcode,
        "ciphered_passcode": ciphered_passcode,
        "code": passcode_hash,
        "passcode_position_idxs": padded_passcode_position_indices[:passcode_len],
        "pad_user_passcode_idxs": padded_passcode_position_indices,
        "ordered_user_position_key":ordered_user_position_key,
        "mask": mask,
        "selected_keys": selected_keys_login,
        "login_keypad": display_keypad(login_keypad, keypad_size.props_per_key),
        "ordered_keys": login_keypad.reshape(-1, keypad_size.props_per_key)[selected_keys_login],
        "old_props": old_props,
        "new_props": new_props,
        "old_pos": old_pos,
        "new_pos": new_pos,
        "xor_props": props_xor,
        "xor_pos": pos_xor,
        "inter_user_position": user.cipher.combined_position_key ^ pos_xor,
        "inter_user_property_key": user.cipher.property_key ^ props_xor,
        "new_user_position": new_user_cipher.combined_position_key,
        "new_user_property_key": new_user_cipher.property_key,
    }
    render_markdown_template(Path("../templates/encipher_decipher_renew_nkode.template.md"), Path("../encipher_decipher_renew_nkode.md"), context)