// src/components/Auth/AuthFormContent.js
// 统一的认证表单组件
import React, { useState, useEffect, useRef } from "react";
import { useNavigate } from "react-router-dom";
import {
    Box,
    Button,
    FormControl,
    Input,
    Heading,
    VStack,
    HStack,
    Stack,
    useToast,
    Icon,
    FormErrorMessage,
    Center,
    AlertDialog,
    AlertDialogBody,
    AlertDialogFooter,
    AlertDialogHeader,
    AlertDialogContent,
    AlertDialogOverlay,
    Text,
    Link as ChakraLink,
    useBreakpointValue,
    Divider,
    IconButton,
} from "@chakra-ui/react";
import { FaLock, FaWeixin } from "react-icons/fa";
import { useAuth } from "../../contexts/AuthContext";
import { useAuthModal } from "../../hooks/useAuthModal";
import { useNotification } from "../../contexts/NotificationContext";
import { authService } from "../../services/authService";
import AuthHeader from './AuthHeader';
import VerificationCodeInput from './VerificationCodeInput';
import WechatRegister from './WechatRegister';
import { setCurrentUser } from '../../mocks/data/users';
import { logger } from '../../utils/logger';
import { useAuthEvents } from '../../hooks/useAuthEvents';

// 统一配置对象
const AUTH_CONFIG = {
    // UI文本
    title: "价值前沿",
    subtitle: "开启您的投资之旅",
    formTitle: "登陆/注册",
    buttonText: "登录/注册",
    loadingText: "验证中...",
    successTitle: "验证成功",
    successDescription: "欢迎！",
    errorTitle: "验证失败",

    // API配置
    api: {
        endpoint: '/api/auth/register/phone',
        purpose: 'login', // ⚡ 统一使用 'login' 模式
    },

    // 功能开关
    features: {
        successDelay: 1000,  // 延迟1秒显示成功提示
    }
};

export default function AuthFormContent() {
    const toast = useToast();
    const navigate = useNavigate();
    const { checkSession } = useAuth();
    const { handleLoginSuccess } = useAuthModal();
    const { showWelcomeGuide } = useNotification();

    // 使用统一配置
    const config = AUTH_CONFIG;

    // 追踪组件挂载状态，防止内存泄漏
    const isMountedRef = useRef(true);
    const cancelRef = useRef(); // AlertDialog 需要的 ref

    // 页面状态
    const [isLoading, setIsLoading] = useState(false);
    const [errors, setErrors] = useState({});

    // 昵称设置引导对话框
    const [showNicknamePrompt, setShowNicknamePrompt] = useState(false);
    const [currentPhone, setCurrentPhone] = useState("");

    // 响应式断点
    const isMobile = useBreakpointValue({ base: true, md: false });
    const stackDirection = useBreakpointValue({ base: "column", md: "row" });

    // 事件追踪
    const authEvents = useAuthEvents({
        component: 'AuthFormContent',
        isMobile,
    });
    const stackSpacing = useBreakpointValue({ base: 4, md: 2 }); // ✅ 桌面端从32px减至8px，更紧凑

    // 表单数据
    const [formData, setFormData] = useState({
        phone: "",
        verificationCode: "",
    });

    // 验证码状态
    const [verificationCodeSent, setVerificationCodeSent] = useState(false);
    const [sendingCode, setSendingCode] = useState(false);
    const [countdown, setCountdown] = useState(0);

    // 输入框变化处理
    const handleInputChange = (e) => {
        const { name, value } = e.target;
        setFormData(prev => ({
            ...prev,
            [name]: value
        }));

        // 追踪用户开始填写手机号 (判断用户选择了手机登录方式)
        if (name === 'phone' && value.length === 1 && !formData.phone) {
            authEvents.trackPhoneLoginInitiated(value);
        }

        // 追踪验证码输入变化
        if (name === 'verificationCode') {
            authEvents.trackVerificationCodeInputChanged(value.length);
        }
    };

    // 倒计时逻辑
    useEffect(() => {
        let timer;
        let isMounted = true;

        if (countdown > 0) {
            timer = setInterval(() => {
                if (isMounted) {
                    setCountdown(prev => prev - 1);
                }
            }, 1000);
        } else if (countdown === 0 && isMounted) {
            setVerificationCodeSent(false);
        }

        return () => {
            isMounted = false;
            if (timer) clearInterval(timer);
        };
    }, [countdown]);

    // 发送验证码
    const sendVerificationCode = async () => {
        const credential = formData.phone;

        if (!credential) {
            toast({
                title: "请先输入手机号",
                status: "warning",
                duration: 3000,
            });
            return;
        }

        // 清理手机号格式字符（空格、横线、括号等）
        const cleanedCredential = credential.replace(/[\s\-\(\)\+]/g, '');

        if (!/^1[3-9]\d{9}$/.test(cleanedCredential)) {
            authEvents.trackPhoneNumberValidated(credential, false, 'invalid_format');
            authEvents.trackFormValidationError('phone', 'invalid_format', '请输入有效的手机号');
            toast({
                title: "请输入有效的手机号",
                status: "warning",
                duration: 3000,
            });
            return;
        }

        // 追踪手机号验证通过
        authEvents.trackPhoneNumberValidated(credential, true);

        try {
            setSendingCode(true);

            const requestData = {
                credential: cleanedCredential,  // 使用清理后的手机号
                type: 'phone',
                purpose: config.api.purpose
            };

            const response = await fetch('/api/auth/send-verification-code', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                credentials: 'include',
                body: JSON.stringify(requestData),
            });

            if (!response) {
                throw new Error('网络请求失败，请检查网络连接');
            }

            const data = await response.json();

            if (!isMountedRef.current) return;

            if (!data) {
                throw new Error('服务器响应为空');
            }

            if (response.ok && data.success) {
                // 追踪验证码发送成功 (或重发)
                const isResend = verificationCodeSent;
                if (isResend) {
                    authEvents.trackVerificationCodeResent(credential, countdown > 0 ? 2 : 1);
                } else {
                    authEvents.trackVerificationCodeSent(credential, config.api.purpose);
                }

                // ✅ 开发环境下在控制台显示验证码
                if (data.dev_code) {
                    console.log(`%c✅ [验证码] ${cleanedCredential} -> ${data.dev_code}`, 'color: #16a34a; font-weight: bold; font-size: 14px;');
                }

                setVerificationCodeSent(true);
                setCountdown(60);
            } else {
                throw new Error(data.error || '发送验证码失败');
            }
        } catch (error) {
            // 追踪验证码发送失败
            authEvents.trackVerificationCodeSendFailed(credential, error);
            authEvents.trackError('api', error.message || '发送验证码失败', {
                endpoint: '/api/auth/send-verification-code',
                phone_masked: credential.substring(0, 3) + '****' + credential.substring(7)
            });

            logger.api.error('POST', '/api/auth/send-verification-code', error, {
                credential: cleanedCredential.substring(0, 3) + '****' + cleanedCredential.substring(7)
            });

            // ✅ 显示错误提示给用户
            toast({
                id: 'send-code-error',
                title: "发送验证码失败",
                description: error.message || "请稍后重试",
                status: "error",
                duration: 3000,
                isClosable: true,
                position: 'top',
                containerStyle: {
                    zIndex: 10000,
                }
            });
        } finally {
            if (isMountedRef.current) {
                setSendingCode(false);
            }
        }
    };

    // 提交处理（登录或注册）
    const handleSubmit = async (e) => {
        e.preventDefault();
        setIsLoading(true);

        try {
            const { phone, verificationCode } = formData;

            // 表单验证
            if (!phone || !verificationCode) {
                toast({
                    title: "请填写完整信息",
                    description: "手机号和验证码不能为空",
                    status: "warning",
                    duration: 3000,
                });
                return;
            }

            // 清理手机号格式字符（空格、横线、括号等）
            const cleanedPhone = phone.replace(/[\s\-\(\)\+]/g, '');

            if (!/^1[3-9]\d{9}$/.test(cleanedPhone)) {
                toast({
                    title: "请输入有效的手机号",
                    status: "warning",
                    duration: 3000,
                });
                return;
            }

            // 追踪验证码提交
            authEvents.trackVerificationCodeSubmitted(phone);

            // 构建请求体
            const requestBody = {
                credential: cleanedPhone,  // 使用清理后的手机号
                verification_code: verificationCode.trim(),  // 添加 trim() 防止空格
                login_type: 'phone',
            };

            // 调用API（根据模式选择不同的endpoint
            const response = await fetch('/api/auth/login-with-code', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                credentials: 'include',
                body: JSON.stringify(requestBody),
            });

            if (!response) {
                throw new Error('网络请求失败，请检查网络连接');
            }

            const data = await response.json();

            if (!isMountedRef.current) return;

            if (!data) {
                throw new Error('服务器响应为空');
            }

            if (response.ok && data.success) {
                // 更新session
                await checkSession();

                // ✅ 兼容后端两种命名格式：camelCase (isNewUser) 和 snake_case (is_new_user)
                const isNewUser = data.isNewUser ?? data.is_new_user ?? false;

                // 追踪登录成功并识别用户
                authEvents.trackLoginSuccess(data.user, 'phone', isNewUser);

                // ✅ 保留登录成功 toast（关键操作提示）
                toast({
                    title: isNewUser ? '注册成功' : '登录成功',
                    description: config.successDescription,
                    status: "success",
                    duration: 2000,
                });

                // 检查是否为新注册用户
                if (isNewUser) {
                    // 新注册用户，延迟后显示昵称设置引导
                    setTimeout(() => {
                        setCurrentPhone(phone);
                        setShowNicknamePrompt(true);
                        // 追踪昵称设置引导显示
                        authEvents.trackNicknamePromptShown(phone);
                    }, config.features.successDelay);
                } else {
                    // 已有用户，直接登录成功
                    setTimeout(() => {
                        handleLoginSuccess({ phone });
                    }, config.features.successDelay);
                }

                // ⚡ 延迟 10 秒显示权限引导（温和、非侵入）
                setTimeout(() => {
                    if (showWelcomeGuide) {
                        logger.info('AuthFormContent', '显示欢迎引导');
                        showWelcomeGuide();
                    }
                }, 10000);
            } else {
                throw new Error(data.error || `${config.errorTitle}`);
            }
        } catch (error) {
            const { phone, verificationCode } = formData;

            // 追踪登录失败
            const errorType = error.message.includes('网络') ? 'network' :
                             error.message.includes('服务器') ? 'api' : 'validation';
            authEvents.trackLoginFailed('phone', errorType, error.message, {
                phone_masked: phone ? phone.substring(0, 3) + '****' + phone.substring(7) : 'N/A',
                has_verification_code: !!verificationCode
            });

            logger.error('AuthFormContent', 'handleSubmit', error, {
                phone: phone ? phone.substring(0, 3) + '****' + phone.substring(7) : 'N/A',
                hasVerificationCode: !!verificationCode
            });

            // ✅ 显示错误提示给用户
            toast({
                id: 'auth-verification-error',
                title: config.errorTitle,
                description: error.message || "请检查验证码是否正确",
                status: "error",
                duration: 3000,
                isClosable: true,
                position: 'top',
                containerStyle: {
                    zIndex: 10000,
                }
            });
        } finally {
            if (isMountedRef.current) {
                setIsLoading(false);
            }
        }
    };

    // 微信H5登录处理
    const handleWechatH5Login = async () => {
        // 追踪用户选择微信登录
        authEvents.trackWechatLoginInitiated('icon_button');

        try {
            // 1. 构建回调URL，携带当前页面路径以便登录后返回
            const currentPath = window.location.pathname + window.location.search;
            const returnUrl = encodeURIComponent(currentPath);
            const redirectUrl = `${window.location.origin}/home/wechat-callback?returnUrl=${returnUrl}`;

            // 2. 显示提示
            toast({
                title: "即将跳转",
                description: "正在跳转到微信授权页面...",
                status: "info",
                duration: 2000,
                isClosable: true,
            });

            // 3. 获取微信H5授权URL
            const response = await authService.getWechatH5AuthUrl(redirectUrl);

            if (!response || !response.auth_url) {
                throw new Error('获取授权链接失败');
            }

            // 追踪微信H5跳转
            authEvents.trackWechatH5Redirect();

            // 4. 延迟跳转，让用户看到提示
            setTimeout(() => {
                window.location.href = response.auth_url;
            }, 500);
        } catch (error) {
            // 追踪跳转失败
            authEvents.trackError('api', error.message || '获取微信授权链接失败', {
                context: 'wechat_h5_redirect'
            });

            logger.error('AuthFormContent', 'handleWechatH5Login', error);
            toast({
                title: "跳转失败",
                description: error.message || "请稍后重试",
                status: "error",
                duration: 3000,
                isClosable: true,
            });
        }
    };

    // 组件挂载时追踪页面浏览
    useEffect(() => {
        isMountedRef.current = true;

        // 追踪登录页面浏览
        authEvents.trackLoginPageViewed();

        return () => {
            isMountedRef.current = false;
        };
    // eslint-disable-next-line react-hooks/exhaustive-deps
    }, []);  // 仅在挂载时执行一次，避免 countdown 倒计时导致重复触发

    return (
        <>
            <Box width="100%">
                <AuthHeader title={config.title} subtitle={config.subtitle} />
                <Stack direction={stackDirection} spacing={stackSpacing} align="stretch">
                    <Box flex={{ base: "1", md: "4" }}>
                        <form onSubmit={handleSubmit}>
                            <VStack spacing={4}>
                                <Heading size="md" color="gray.700" alignSelf="flex-start">{config.formTitle}</Heading>
                                <FormControl isRequired isInvalid={!!errors.phone}>
                                    <Input name="phone" value={formData.phone} onChange={handleInputChange} placeholder="请输入11位手机号" />
                                    <FormErrorMessage>{errors.phone}</FormErrorMessage>
                                </FormControl>

                                {/* 验证码输入框 + 移动端微信图标 */}
                                <Box width="100%" position="relative">
                                    <VerificationCodeInput value={formData.verificationCode} onChange={handleInputChange} onSendCode={sendVerificationCode} countdown={countdown} isLoading={isLoading} isSending={sendingCode} error={errors.verificationCode} colorScheme="green" />

                                    {/* 移动端：验证码下方的微信登录图标 */}
                                    {isMobile && (
                                        <HStack spacing={0} mt={2} alignItems="center">
                                            <Text fontSize="xs" color="gray.500">其他登录方式：</Text>
                                            <IconButton
                                                aria-label="微信登录"
                                                icon={<Icon as={FaWeixin} w={4} h={4} />}
                                                size="sm"
                                                variant="ghost"
                                                color="#07C160"
                                                borderRadius="md"
                                                minW="24px"
                                                minH="24px"
                                                _hover={{
                                                    bg: "green.50",
                                                    color: "#06AD56"
                                                }}
                                                _active={{
                                                    bg: "green.100"
                                                }}
                                                onClick={handleWechatH5Login}
                                                isDisabled={isLoading}
                                            />
                                        </HStack>
                                    )}
                                </Box>

                                <Button type="submit" width="100%" size="lg" colorScheme="green" color="white" borderRadius="lg" isLoading={isLoading} loadingText={config.loadingText} fontWeight="bold"><Icon as={FaLock} mr={2} />{config.buttonText}</Button>

                                {/* 隐私声明 */}
                                <Text fontSize="xs" color="gray.500" textAlign="center" mt={2}>
                                    登录即表示您同意价值前沿{" "}
                                    <ChakraLink
                                        as="a"
                                        href="/home/user-agreement"
                                        target="_blank"
                                        rel="noopener noreferrer"
                                        color="blue.500"
                                        textDecoration="underline"
                                        _hover={{ color: "blue.600" }}
                                        onClick={authEvents.trackUserAgreementClicked}
                                    >
                                        《用户协议》
                                    </ChakraLink>
                                    {" "}和{" "}
                                    <ChakraLink
                                        as="a"
                                        href="/home/privacy-policy"
                                        target="_blank"
                                        rel="noopener noreferrer"
                                        color="blue.500"
                                        textDecoration="underline"
                                        _hover={{ color: "blue.600" }}
                                        onClick={authEvents.trackPrivacyPolicyClicked}
                                    >
                                        《隐私政策》
                                    </ChakraLink>
                                </Text>
                            </VStack>
                        </form>
                    </Box>

                    {/* 桌面端：右侧二维码扫描 */}
                    {!isMobile && (
                        <Box flex={{ base: "1", md: "0 0 auto" }}> {/* ✅ 桌面端让右侧自适应宽度 */}
                            <Center width="100%"> {/* ✅ 移除bg和p，WechatRegister自带白色背景和padding */}
                                <WechatRegister />
                            </Center>
                        </Box>
                    )}
                </Stack>
            </Box>

            {/* 只在需要时才渲染 AlertDialog，避免创建不必要的 Portal */}
            {showNicknamePrompt && (
                <AlertDialog isOpen={showNicknamePrompt} leastDestructiveRef={cancelRef} onClose={() => { setShowNicknamePrompt(false); handleLoginSuccess({ phone: currentPhone }); }} isCentered closeOnEsc={true} closeOnOverlayClick={false}>
                    <AlertDialogOverlay>
                        <AlertDialogContent>
                            <AlertDialogHeader fontSize="lg" fontWeight="bold">完善个人信息</AlertDialogHeader>
                            <AlertDialogBody>您已成功注册！是否前往个人资料设置昵称和其他信息？</AlertDialogBody>
                            <AlertDialogFooter>
                                <Button
                                    ref={cancelRef}
                                    onClick={() => {
                                        authEvents.trackNicknamePromptSkipped();
                                        setShowNicknamePrompt(false);
                                        handleLoginSuccess({ phone: currentPhone });
                                    }}
                                >
                                    稍后再说
                                </Button>
                                <Button
                                    colorScheme="green"
                                    onClick={() => {
                                        authEvents.trackNicknamePromptAccepted();
                                        setShowNicknamePrompt(false);
                                        handleLoginSuccess({ phone: currentPhone });
                                        setTimeout(() => {
                                            navigate('/home/profile');
                                        }, 300);
                                    }}
                                    ml={3}
                                >
                                    去设置
                                </Button>
                            </AlertDialogFooter>
                        </AlertDialogContent>
                    </AlertDialogOverlay>
                </AlertDialog>
            )}
        </>
    );
}