// static/js/auth.js
export const authData = () => ({
    isLoggedIn: false,
    userEmail: '',
    isAdmin: false, // Add isAdmin state
    signupForm: {
        email: '',
        password: '',
        verificationCode: ''
    },
    isSendingCode: false,
    countdown: 60,
    verificationCodeMessage: '',
    loginForm: {
        email: '',
        password: ''
    },
    signupMessage: '',
    authMessage: '', // Combined message for login and forgot password
    showChangePasswordModal: false,
    changePasswordForm: {
        newPassword: '',
        confirmPassword: ''
    },
    changePasswordMessage: '',
    resetPasswordForm: {
        email: '',
        verificationCode: '', // Add verification code field for reset password
        newPassword: '',
        confirmPassword: ''
    },
    resetPasswordMessage: ''
});

export const authMethods = (app) => ({
    resetPasswordLink() {
        const email = this.loginForm.email;
        if (email) {
            return `/reset-password?email=${encodeURIComponent(email)}`;
        }
        return '/reset-password';
    },
    async sendVerificationCode() {
        console.log('sendVerificationCode method triggered.');
        console.log('Current email:', this.signupForm.email);
        this.verificationCodeMessage = '';
        // 更严格的邮箱格式校验
        const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
        if (!this.signupForm.email || !emailRegex.test(this.signupForm.email)) {
            this.verificationCodeMessage = '请输入有效的邮箱地址。';
            console.log('Invalid email format.');
            return;
        }

        this.isSendingCode = true;
        let timer = setInterval(() => {
            if (this.countdown > 0) {
                this.countdown--;
            } else {
                clearInterval(timer);
                this.isSendingCode = false;
                this.countdown = 60;
            }
        }, 1000);

        try {
            const response = await fetch('/api/auth/send-verification-code', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ email: this.signupForm.email })
            });
            const data = await response.json();
            if (response.ok) {
                this.verificationCodeMessage = data.message || '验证码已发送，请检查您的邮箱。';
            } else {
                this.verificationCodeMessage = data.detail || data.message || '发送验证码失败。';
                // 如果发送失败，立即停止倒计时并重置按钮
                clearInterval(timer);
                this.isSendingCode = false;
                this.countdown = 60;
            }
        } catch (error) {
            this.verificationCodeMessage = '网络错误或服务器无响应。';
            console.error('Send verification code error:', error);
            // 如果网络错误，立即停止倒计时并重置按钮
            clearInterval(timer);
            this.isSendingCode = false;
            this.countdown = 60;
        }
    },
    async sendResetVerificationCode() {
        console.log('sendResetVerificationCode method triggered.');
        console.log('Current email for reset:', this.resetPasswordForm.email);
        this.resetPasswordMessage = ''; // Clear previous messages
        const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
        if (!this.resetPasswordForm.email || !emailRegex.test(this.resetPasswordForm.email)) {
            this.resetPasswordMessage = '请输入有效的邮箱地址。';
            console.log('Invalid email format for reset.');
            return;
        }

        this.isSendingCode = true;
        let timer = setInterval(() => {
            if (this.countdown > 0) {
                this.countdown--;
            } else {
                clearInterval(timer);
                this.isSendingCode = false;
                this.countdown = 60;
            }
        }, 1000);

        try {
            const response = await fetch('/api/auth/send-reset-password-code', { // New API endpoint for reset password code
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ email: this.resetPasswordForm.email })
            });
            const data = await response.json();
            if (response.ok) {
                this.resetPasswordMessage = data.message || '重置密码验证码已发送，请检查您的邮箱。';
            } else {
                this.resetPasswordMessage = data.detail || data.message || '发送重置密码验证码失败。';
                clearInterval(timer);
                this.isSendingCode = false;
                this.countdown = 60;
            }
        } catch (error) {
            this.resetPasswordMessage = '网络错误或服务器无响应。';
            console.error('Send reset verification code error:', error);
            clearInterval(timer);
            this.isSendingCode = false;
            this.countdown = 60;
        }
    },
    async signup() {
        this.signupMessage = '';
        this.verificationCodeMessage = ''; // Clear verification code message on signup attempt
        try {
            const response = await fetch('/api/auth/signup', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    email: this.signupForm.email,
                    password: this.signupForm.password,
                    verification_code: this.signupForm.verificationCode || '' // Ensure verification_code is always sent
                })
            });
            const data = await response.json();
            if (response.ok) {
                this.signupMessage = '注册成功！请登录。';
                this.signupForm.email = '';
                this.signupForm.password = '';
                this.signupForm.verificationCode = ''; // Clear verification code
            } else {
                this.signupMessage = data.detail || '注册失败。';
            }
        } catch (error) {
            this.signupMessage = '网络错误或服务器无响应。';
            console.error('Signup error:', error);
        }
    },
    async login() {
        this.authMessage = ''; // Clear previous messages
        try {
            const response = await fetch('/api/auth/login', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify(this.loginForm)
            });
            const data = await response.json();
            if (response.ok) {
                localStorage.setItem('access_token', data.access_token);
                this.isLoggedIn = true;
                this.loginForm.email = '';
                this.loginForm.password = '';
                this.authMessage = '登录成功！'; // Use authMessage
                await this.fetchUserEmail(); // Fetch user email after successful login
                this.fetchProxies();
                if (window.location.pathname === '/login') {
                    window.location.href = '/';
                }
            } else {
                this.authMessage = data.detail || '登录失败。'; // Use authMessage
            }
        } catch (error) {
            if (error instanceof TypeError && error.message === 'Failed to fetch') {
                this.authMessage = '网络错误或服务器无响应。'; // Use authMessage
            } else {
                this.authMessage = '邮箱或密码错误。请重新输入！'; // Use authMessage
            }
            console.error('Login error:', error);
        }
    },
    logout() {
        localStorage.removeItem('access_token');
        this.isLoggedIn = false;
        this.userEmail = '';
        this.proxies = [];
        this.authMessage = '已退出登录。'; // Use authMessage
        // 只有在非登录页面才重定向到登录页
        if (window.location.pathname !== '/login') {
            window.location.href = '/login';
        }
    },
    async forgotPassword() {
        const email = this.loginForm.email;
        let redirectUrl = '/reset-password';
        if (email) {
            redirectUrl += `?email=${encodeURIComponent(email)}`;
        }
        window.location.href = redirectUrl;
    },
    async fetchUserEmail() {
        const token = localStorage.getItem('access_token');
        if (!token) {
            this.userEmail = '';
            return;
        }
        try {
            const response = await fetch('/api/user/me', {
                headers: {
                    'Authorization': `Bearer ${token}`
                }
            });
            const data = await response.json();
            if (response.ok) {
                this.userEmail = data.email;
                this.isAdmin = data.is_admin; // Set isAdmin state
            } else {
                console.error('Error fetching user email:', data.detail);
                this.userEmail = '未知用户';
                if (response.status === 401) {
                    this.logout();
                }
            }
        } catch (error) {
            console.error('Error fetching user email:', error);
            this.userEmail = '未知用户';
        }
    },
    checkLoginStatus() {
        const token = localStorage.getItem('access_token');
        if (token) {
            this.isLoggedIn = true;
            this.fetchUserEmail();
            // 只有在登录页面才重定向到首页
            if (window.location.pathname === '/login') {
                window.location.href = '/';
            }
        } else {
            this.isLoggedIn = false;
            this.userEmail = '';
            // 如果在首页，不强制重定向到登录页
            // 如果在需要登录的页面（如 /dashboard 或其他受保护路由），则重定向到登录页
            // 目前只处理 /login 页面，其他页面需要后端或路由守卫处理
        }
    },
    async changePassword() {
        this.changePasswordMessage = '';
        if (this.changePasswordForm.newPassword !== this.changePasswordForm.confirmPassword) {
            this.changePasswordMessage = '两次输入的密码不一致。';
            return;
        }
        const token = localStorage.getItem('access_token');
        if (!token) {
            this.changePasswordMessage = '未登录，请先登录。';
            return;
        }

        try {
            const response = await fetch('/api/auth/change-password', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Authorization': `Bearer ${token}`
                },
                body: JSON.stringify({ new_password: this.changePasswordForm.newPassword })
            });
            const data = await response.json();
            if (response.ok) {
                this.changePasswordMessage = '密码修改成功！请重新登录。';
                this.showChangePasswordModal = false;
                this.changePasswordForm.newPassword = '';
                this.changePasswordForm.confirmPassword = '';
                this.logout();
            } else {
                this.changePasswordMessage = data.detail || '密码修改失败。';
            }
        } catch (error) {
            this.changePasswordMessage = '网络错误或服务器无响应。';
            console.error('Change password error:', error);
        }
    },
    async resetPassword() {
        this.resetPasswordMessage = '';
        if (this.resetPasswordForm.newPassword !== this.resetPasswordForm.confirmPassword) {
            this.resetPasswordMessage = '两次输入的密码不一致。';
            return;
        }

        const urlQueryParams = new URLSearchParams(window.location.search);
        const resetToken = urlQueryParams.get('token');

        if (!resetToken) {
            this.resetPasswordMessage = '缺少重置密码所需的令牌。';
            return;
        }

        // 清除URL中的token，避免泄露
        const newUrl = window.location.pathname + window.location.hash;
        history.replaceState(null, '', newUrl);

        try {
            const response = await fetch('/api/auth/change-password', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ 
                    new_password: this.resetPasswordForm.newPassword,
                    reset_token: resetToken 
                })
            });
            const data = await response.json();
            if (response.ok) {
                this.resetPasswordMessage = '密码重置成功！请使用新密码登录。';
                this.resetPasswordForm.newPassword = '';
                this.resetPasswordForm.confirmPassword = '';
                window.location.href = '/login';
            } else {
                this.resetPasswordMessage = data.detail || '密码重置失败。';
            }
        } catch (error) {
            this.resetPasswordMessage = '网络错误或服务器无响应。';
            console.error('Reset password error:', error);
        }
    },
    async resetPasswordWithCode() {
        this.resetPasswordMessage = '';
        if (this.resetPasswordForm.newPassword !== this.resetPasswordForm.confirmPassword) {
            this.resetPasswordMessage = '两次输入的密码不一致。';
            return;
        }
        if (!this.resetPasswordForm.email || !this.resetPasswordForm.verificationCode) {
            this.resetPasswordMessage = '邮箱和验证码不能为空。';
            return;
        }

        try {
            const response = await fetch('/api/auth/reset-password-with-code', { // New API endpoint
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    email: this.resetPasswordForm.email,
                    verification_code: this.resetPasswordForm.verificationCode,
                    new_password: this.resetPasswordForm.newPassword
                })
            });
            const data = await response.json();
            if (response.ok) {
                this.resetPasswordMessage = '密码重置成功！请使用新密码登录。';
                this.resetPasswordForm.email = '';
                this.resetPasswordForm.verificationCode = '';
                this.resetPasswordForm.newPassword = '';
                this.resetPasswordForm.confirmPassword = '';
                window.location.href = '/login';
            } else {
                this.resetPasswordMessage = data.detail || '密码重置失败。';
            }
        } catch (error) {
            this.resetPasswordMessage = '网络错误或服务器无响应。';
            console.error('Reset password with code error:', error);
        }
    }
});

export const authMounted = (app) => {
    app.checkLoginStatus(); // 在应用挂载时检查登录状态
    // Check if it's the reset-password page and handle token
    if (window.location.pathname === '/reset-password') {
        console.log('Current URL:', window.location.href);
        const urlQueryParams = new URLSearchParams(window.location.search);
        // const resetToken = urlQueryParams.get('token'); // Remove token check
        const emailParam = urlQueryParams.get('email');

        if (emailParam) {
            app.resetPasswordForm.email = emailParam;
            console.log('Mounted: Email param found and pre-filled:', emailParam);
        }

        // Remove token-related logic
        // if (resetToken) {
        //     console.log('Mounted: Valid reset token found. Clearing URL query param.');
        //     const newUrl = window.location.pathname + (emailParam ? `?email=${encodeURIComponent(emailParam)}` : '') + window.location.hash;
        //     history.replaceState(null, '', newUrl);
        // } else {
        //     console.warn('Mounted: No valid reset token found for reset password page.');
        // }
    }
};