import { useState } from 'react';
import { WalletType } from 'rnwalletman';

export interface OTPBindCallbacks {
    onRequestOTP: (walletType: WalletType, params: any) => Promise<any>;
    onVerifyOTP: (walletType: WalletType, params: any) => Promise<any>;
    onSuccess: (result: any) => void;
    onError: (error: string) => void;
    isDebug?: boolean;
}

export interface OTPBindState {
    mobile: string;
    otp: string;
    step: 'mobile' | 'otp' | 'processing';
    loading: boolean;
    otpData: any;
    errorMessage: string;
}

export interface OTPBindActions {
    setMobile: (mobile: string) => void;
    setOtp: (otp: string) => void;
    requestOTP: () => Promise<void>;
    verifyOTP: () => Promise<void>;
    resetToMobile: () => void;
    clearError: () => void;
}

export function useOTPBind(
    walletType: WalletType,
    callbacks: OTPBindCallbacks,
    config?: {
        otpLength?: number;
        mobileLength?: number;
        additionalParams?: any;
    }
): [OTPBindState, OTPBindActions] {
    const [mobile, setMobile] = useState('');
    const [otp, setOtp] = useState('');
    const [step, setStep] = useState<'mobile' | 'otp' | 'processing'>('mobile');
    const [loading, setLoading] = useState(false);
    const [otpData, setOtpData] = useState<any>(null);
    const [errorMessage, setErrorMessage] = useState('');

    const { onRequestOTP, onVerifyOTP, onSuccess, onError, isDebug = false } = callbacks;
    const { otpLength = 6, mobileLength = 10, additionalParams = {} } = config || {};

    const clearError = () => setErrorMessage('');

    const log = (...args: any[]) => {
        if (isDebug) console.log(`[${walletType}]`, ...args);
    };

    const error = (...args: any[]) => {
        if (isDebug) console.error(`[${walletType}]`, ...args);
    };

    const requestOTP = async () => {
        if (!mobile || mobile.length !== mobileLength) {
            const msg = 'Invalid mobile number';
            setErrorMessage(msg);
            onError(msg);
            return;
        }

        setLoading(true);
        setErrorMessage('');
        log('Requesting OTP for:', mobile);

        try {
            const response = await onRequestOTP(walletType, {
                mobile,
                ...additionalParams,
            });
            log('OTP response:', response);

            if (response.success) {
                setOtpData(response.data);
                setStep('otp');
                setErrorMessage('');
            } else {
                error('OTP request failed:', response.message);
                const msg = response.message || 'Failed to request OTP';
                setErrorMessage(msg);
                onError(msg);
            }
        } catch (e) {
            error('Request OTP error:', e);
            const msg = e instanceof Error ? e.message : 'Failed to request OTP';
            setErrorMessage(msg);
            onError(msg);
        } finally {
            setLoading(false);
        }
    };

    const verifyOTP = async () => {
        if (!otp || otp.length !== otpLength) {
            const msg = `请输入 ${otpLength} 位验证码`;
            setErrorMessage(msg);
            onError(msg);
            return;
        }

        setLoading(true);
        setErrorMessage('');
        setStep('processing');
        log('Verifying OTP:', otp);

        try {
            const response = await onVerifyOTP(walletType, {
                mobile,
                otp,
                ...additionalParams,
                ...(otpData || {}),
            });
            log('Verify response:', response);

            if (response.success) {
                setErrorMessage('');
                onSuccess(response.data);
            } else {
                error('Verify failed:', response.message);
                const msg = response.message || 'Failed to verify OTP';
                setStep('otp');
                setErrorMessage(msg);
                onError(msg);
            }
        } catch (e) {
            error('Verify OTP error:', e);
            const msg = e instanceof Error ? e.message : 'Failed to verify OTP';
            setStep('otp');
            setErrorMessage(msg);
            onError(msg);
        } finally {
            setLoading(false);
        }
    };

    const resetToMobile = () => {
        setStep('mobile');
        setOtp('');
        setErrorMessage('');
    };

    return [
        { mobile, otp, step, loading, otpData, errorMessage },
        { setMobile, setOtp, requestOTP, verifyOTP, resetToMobile, clearError },
    ];
}