// Simple authentication system for Agilisium Co-Lab
const AUTH_KEY = 'onco.auth';

// Demo user data
const DEMO_USER = {
    id: 'demo-001',
    name: 'Dev Karan',
    email: 'demo@agilisium.com',
    password: 'Demo@123',
    role: 'researcher',
    avatar: 'DK'
};

// Auth helpers
const auth = {
    // Login with email and password
    login(email, password, rememberMe = false) {
        return new Promise((resolve) => {
            // Simulate network delay
            setTimeout(() => {
                if (email === DEMO_USER.email && password === DEMO_USER.password) {
                    const user = {
                        id: DEMO_USER.id,
                        name: DEMO_USER.name,
                        email: DEMO_USER.email,
                        role: DEMO_USER.role,
                        avatar: DEMO_USER.avatar,
                        token: 'token_' + Date.now(),
                        expiresAt: Date.now() + (7 * 24 * 60 * 60 * 1000) // 7 days
                    };
                    
                    localStorage.setItem(AUTH_KEY, JSON.stringify(user));
                    resolve({ success: true, user });
                } else {
                    resolve({ success: false, error: 'Invalid email or password' });
                }
            }, 500);
        });
    },

    // Quick demo login
    loginAsDemo() {
        return this.login(DEMO_USER.email, DEMO_USER.password, true);
    },

    // Logout
    logout() {
        localStorage.removeItem(AUTH_KEY);
        this.showToast('You\'re signed out.', 'info');
    },

    // Get current user
    getUser() {
        try {
            const userData = localStorage.getItem(AUTH_KEY);
            if (!userData) return null;
            
            const user = JSON.parse(userData);
            
            // Check if session expired
            if (user.expiresAt && Date.now() > user.expiresAt) {
                this.logout();
                return null;
            }
            
            return user;
        } catch (error) {
            return null;
        }
    },

    // Check if authenticated
    isAuthenticated() {
        return this.getUser() !== null;
    },

    // Show toast notification
    showToast(message, type = 'info') {
        // Remove existing toasts
        const existingToasts = document.querySelectorAll('.toast');
        existingToasts.forEach(toast => toast.remove());

        const toast = document.createElement('div');
        toast.className = `toast toast-${type}`;
        toast.textContent = message;
        
        Object.assign(toast.style, {
            position: 'fixed',
            top: '20px',
            right: '20px',
            padding: '12px 20px',
            borderRadius: '8px',
            color: 'white',
            fontWeight: '500',
            zIndex: '10000',
            transform: 'translateX(100%)',
            transition: 'transform 0.3s ease',
            maxWidth: '300px',
            wordWrap: 'break-word',
            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.15)'
        });

        const colors = {
            success: '#10B981',
            error: '#EF4444',
            info: '#3B82F6'
        };
        toast.style.backgroundColor = colors[type];

        document.body.appendChild(toast);

        // Animate in
        setTimeout(() => {
            toast.style.transform = 'translateX(0)';
        }, 100);

        // Remove after delay
        setTimeout(() => {
            toast.style.transform = 'translateX(100%)';
            setTimeout(() => {
                if (toast.parentNode) {
                    toast.parentNode.removeChild(toast);
                }
            }, 300);
        }, 3000);
    }
};

// Make auth globally available
window.auth = auth;