import { Anchor, AspectRatio, Avatar, Box, Flex, PasswordInput, Skeleton, Text, Transition} from "@mantine/core";
import classes from './Lockscreen.module.css'
import { useEffect, useState } from "react";
import { useNavigate } from "react-router-dom";
import useWindow from "@/app/hooks/useWindow";
import { decodeWithPassword, generateHashFromPrivateKey } from "@/app/crypto/crypto";
import { useAccountProvider } from "@/app/providers/AccountProvider/useAccountProvider";
import { Account, AccountBase } from "@/app/providers/AccountProvider/AccountProvider";
import { useUserCache } from "@/app/providers/InformationProvider/useUserCache";
import { useRosettaColors } from "@/app/hooks/useRosettaColors";
import { IconArrowsExchange, IconFingerprint } from "@tabler/icons-react";
import { SIZE_LOGIN_WIDTH_PX } from "@/app/constants";
import { modals } from "@mantine/modals";
import { useAvatars } from "@/app/providers/AvatarProvider/useAvatars";
import { AnimatedButton } from "@/app/components/AnimatedButton/AnimatedButton";
import { DiceDropdown } from "@/app/components/DiceDropdown/DiceDropdown";
import { dotCenterIfNeeded } from "@/app/utils/utils";

export function Lockscreen() {
    const [password, setPassword] = useState("");
    const navigate = useNavigate();
    const { setSize, setResizeble } = useWindow();
    const { allAccounts, selectAccountToLoginDice, loginDiceAccount, loginAccount } = useAccountProvider();
    /**
     * Добавлено условие ИЛИ для того, чтобы аккаунт отображался
     * даже если пользователь в кэше не найден
     */
    const userInfo = useUserCache(loginDiceAccount.publicKey) || {
        title: loginDiceAccount.publicKey,
    };
    const [error, setError] = useState(false);
    const colors = useRosettaColors();
    const avatars = useAvatars(loginDiceAccount.publicKey);
    const [mounted, setMounted] = useState(false);
    

    useEffect(() => { 
        setSize(385, 555); 
        setResizeble(false);
        setTimeout(() => setMounted(true), 100);
    }, []);

    useEffect(() => {
        if (loginDiceAccount.publicKey == "" && allAccounts.length <= 0) {
            navigate("/");
            return;
        }
    }, [loginDiceAccount])

    const onUnlockPressed = async () => {
        try {
            const decryptedHex = await decodeWithPassword(password, loginDiceAccount.privateKey);
            const privateKeyHash = await generateHashFromPrivateKey(decryptedHex);

            const account: Account = {
                privateKey: loginDiceAccount.privateKey,
                publicKey: loginDiceAccount.publicKey,
                privateHash: privateKeyHash,
                privatePlain: decryptedHex,
                seedPhraseEncrypted: loginDiceAccount.seedPhraseEncrypted
            };

            loginAccount(account);    

            navigate("/main");
        } catch (e) {
            setError(true);
        }
    }

    const createAccount = () => {
        modals.openConfirmModal({
            title: 'Create account',
            centered: true,
            children: (
                <Text size="sm">
                    You may be create new account or import existing
                </Text>
            ),
            withCloseButton: false,
            labels: { confirm: 'Create new', cancel: "Import" },
            cancelProps: {
                autoFocus: false,
                style: {
                    outline: 'none'
                }
            },
            onCancel: () => {
                navigate("/exists-seed");
            },
            onConfirm: () => {
                navigate("/create-seed");
            }
        });
    }

    const selectAccount = (account: AccountBase) => {
        selectAccountToLoginDice(account);
    }

    useEffect(() => {
        const handleKeyDown = (event: KeyboardEvent) => {
            if (event.key === "Enter") {
                event.preventDefault();
                onUnlockPressed();
            }
        };

        window.addEventListener("keydown", handleKeyDown);
        return () => {
            window.removeEventListener("keydown", handleKeyDown);
        };
    }, [onUnlockPressed]);

    return (
        <Flex style={{
            userSelect: 'none'
        }} h={500} justify={'space-between'} direction={'column'} align={'center'}>
            <div className={classes.inner}>
                <div className={classes.content}>
                    <Flex mt={'md'} align={'center'} direction={'column'} justify={'center'}>
                        {userInfo && (
                            <Box mt={'sm'}>
                                <Flex align={'center'} gap={'sm'} direction={'column'}>
                                     <AspectRatio ratio={2/2} maw={80} mx="auto" pos="relative">
                                        <Avatar radius={'md'} src={avatars.length > 0 ? avatars[0].avatar : undefined} size={80} color={'initials'} name={userInfo.title}></Avatar>
                                     </AspectRatio>
                                    <Flex gap={8} justify={'center'} align={'center'}>
                                        <Text fz={20} h={25} fw={'bold'}>{dotCenterIfNeeded(userInfo.title, 20, 5)}</Text>
                                        <DiceDropdown selectedPublicKey={loginDiceAccount.publicKey} onClick={selectAccount}>
                                            <IconArrowsExchange style={{
                                                position: 'relative',
                                                top: 4,
                                                cursor: 'pointer'
                                            }} color={colors.brandColor} size={18} />
                                        </DiceDropdown>
                                    </Flex>
                                    <Text c={'dimmed'} mt={'xs'} ta={'center'} w={SIZE_LOGIN_WIDTH_PX} size={'xs'}>For unlock account enter password</Text>
                                </Flex>
                            </Box>
                        )}
                        {!userInfo && (
                            <Box>
                                <Flex align={'center'} gap={'sm'} direction={'column'} justify={'center'}>
                                    <Skeleton w={80} h={80}></Skeleton>
                                    <Skeleton h={25} w={150}></Skeleton>
                                </Flex>
                            </Box>
                        )}
                    </Flex>
                    <Transition mounted={mounted} transition="slide-up" duration={400} timingFunction="ease">
                        {(styles) => (
                            <Flex style={styles} mt={40} direction={'column'} align={'center'} justify={'center'} gap={'lg'}>
                                <PasswordInput
                                    placeholder="Password"
                                    value={password}
                                    onChange={(e) => { setPassword(e.target.value); setError(false) }}
                                    size="md"
                                    w={SIZE_LOGIN_WIDTH_PX}
                                    error={error && "Invalid password"}
                                    styles={{
                                        input: {
                                            border: '0px solid ' + colors.borderColor,
                                            backgroundColor: colors.mainColor
                                        },
                                        error: {
                                            color: colors.error
                                        }
                                    }}
                                />
                                <Flex w={SIZE_LOGIN_WIDTH_PX} align={'center'} direction={'column'} justify={'space-between'}>
                                    <AnimatedButton fullWidth leftSection={
                                        <IconFingerprint size={16} />
                                    } animated={['#2DA5FF', '#87DBFF']} size={'md'} onClick={onUnlockPressed}>Enter</AnimatedButton>
                                </Flex>
                            </Flex>
                        )}
                    </Transition>
                </div>
            </div>
            <Transition mounted={mounted} transition="slide-up" duration={500} timingFunction="ease">
                {(styles) => (
                    <Flex style={styles}>
                        <Text c={'dimmed'} ta={'center'} w={SIZE_LOGIN_WIDTH_PX} size={'xs'}>
                            You can also <Anchor style={{
                                textDecoration: 'none'
                            }} fw={500} onClick={() => navigate('/exists-seed')}>recover your password</Anchor> or create a <Anchor style={{
                                textDecoration: 'none'
                            }} fw={500} onClick={createAccount}>new account.</Anchor>
                        </Text>
                    </Flex>
                )}
            </Transition>
        </Flex>
    )
}