// NextSnap - Admin Panel Logic
'use strict';

const Admin = {
    users: [],
    
    async init() {
        await this.loadUsers();
        this.setupEventListeners();
    },
    
    setupEventListeners() {
        document.getElementById('add-user-form').addEventListener('submit', (e) => {
            e.preventDefault();
            this.createUser();
        });
        
        document.getElementById('refresh-btn').addEventListener('click', () => {
            this.loadUsers();
        });
    },
    
    async loadUsers() {
        const userList = document.getElementById('user-list');
        const loadingMsg = document.getElementById('loading-msg');
        const errorMsg = document.getElementById('error-msg');
        
        loadingMsg.style.display = 'block';
        errorMsg.style.display = 'none';
        userList.innerHTML = '';
        
        try {
            const response = await fetch('/api/admin/users');
            
            if (!response.ok) {
                const error = await response.json();
                throw new Error(error.error || 'Failed to load users');
            }
            
            const data = await response.json();
            this.users = data.users || [];
            
            loadingMsg.style.display = 'none';
            
            if (this.users.length === 0) {
                userList.innerHTML = '<tr><td colspan="5" class="empty-state">No users found</td></tr>';
                return;
            }
            
            this.users.forEach(user => {
                const row = this.createUserRow(user);
                userList.appendChild(row);
            });
            
        } catch (error) {
            console.error('Error loading users:', error);
            loadingMsg.style.display = 'none';
            errorMsg.textContent = error.message;
            errorMsg.style.display = 'block';
        }
    },
    
    createUserRow(user) {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${this.escapeHtml(user.id)}</td>
            <td>${this.escapeHtml(user.displayname || '-')}</td>
            <td>${this.escapeHtml(user.email || '-')}</td>
            <td>
                <span class="badge ${user.enabled ? 'badge-success' : 'badge-danger'}">
                    ${user.enabled ? 'Enabled' : 'Disabled'}
                </span>
            </td>
            <td>
                <div class="action-buttons">
                    ${user.enabled ? 
                        `<button class="btn-action btn-warning" onclick="Admin.disableUser('${user.id}')">Disable</button>` :
                        `<button class="btn-action btn-success" onclick="Admin.enableUser('${user.id}')">Enable</button>`
                    }
                    <button class="btn-action btn-danger" onclick="Admin.confirmDeleteUser('${user.id}')">Delete</button>
                </div>
            </td>
        `;
        return row;
    },
    
    async createUser() {
        const form = document.getElementById('add-user-form');
        const submitBtn = document.getElementById('submit-btn');
        const formError = document.getElementById('form-error');
        const formSuccess = document.getElementById('form-success');
        
        const username = document.getElementById('new-username').value.trim();
        const password = document.getElementById('new-password').value;
        const email = document.getElementById('new-email').value.trim();
        const displayName = document.getElementById('new-displayname').value.trim();
        
        formError.style.display = 'none';
        formSuccess.style.display = 'none';
        
        if (!username || !password) {
            formError.textContent = 'Username and password are required';
            formError.style.display = 'block';
            return;
        }
        
        submitBtn.disabled = true;
        submitBtn.textContent = 'Creating...';
        
        try {
            const response = await fetch('/api/admin/users', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    username: username,
                    password: password,
                    email: email || null,
                    displayName: displayName || null
                })
            });
            
            const result = await response.json();
            
            if (!response.ok) {
                throw new Error(result.error || 'Failed to create user');
            }
            
            formSuccess.textContent = `User "${username}" created successfully!`;
            formSuccess.style.display = 'block';
            
            form.reset();
            
            setTimeout(() => {
                this.loadUsers();
            }, 1000);
            
        } catch (error) {
            console.error('Error creating user:', error);
            formError.textContent = error.message;
            formError.style.display = 'block';
        } finally {
            submitBtn.disabled = false;
            submitBtn.textContent = 'Create User';
        }
    },
    
    async enableUser(username) {
        if (!confirm(`Enable user "${username}"?`)) return;
        
        try {
            const response = await fetch(`/api/admin/users/${username}/enable`, {
                method: 'PUT'
            });
            
            if (!response.ok) {
                const error = await response.json();
                throw new Error(error.error || 'Failed to enable user');
            }
            
            this.showToast(`User "${username}" enabled`, 'success');
            this.loadUsers();
            
        } catch (error) {
            console.error('Error enabling user:', error);
            this.showToast(error.message, 'error');
        }
    },
    
    async disableUser(username) {
        if (!confirm(`Disable user "${username}"?`)) return;
        
        try {
            const response = await fetch(`/api/admin/users/${username}/disable`, {
                method: 'PUT'
            });
            
            if (!response.ok) {
                const error = await response.json();
                throw new Error(error.error || 'Failed to disable user');
            }
            
            this.showToast(`User "${username}" disabled`, 'success');
            this.loadUsers();
            
        } catch (error) {
            console.error('Error disabling user:', error);
            this.showToast(error.message, 'error');
        }
    },
    
    confirmDeleteUser(username) {
        const modal = document.getElementById('delete-modal');
        const confirmBtn = document.getElementById('confirm-delete');
        
        document.getElementById('delete-username').textContent = username;
        modal.style.display = 'flex';
        
        confirmBtn.onclick = () => {
            this.deleteUser(username);
            this.hideDeleteModal();
        };
    },
    
    hideDeleteModal() {
        document.getElementById('delete-modal').style.display = 'none';
    },
    
    async deleteUser(username) {
        try {
            const response = await fetch(`/api/admin/users/${username}`, {
                method: 'DELETE'
            });
            
            if (!response.ok) {
                const error = await response.json();
                throw new Error(error.error || 'Failed to delete user');
            }
            
            this.showToast(`User "${username}" deleted`, 'success');
            this.loadUsers();
            
        } catch (error) {
            console.error('Error deleting user:', error);
            this.showToast(error.message, 'error');
        }
    },
    
    showToast(message, type) {
        const toast = document.getElementById('toast');
        toast.textContent = message;
        toast.className = `toast ${type}`;
        toast.style.display = 'block';
        
        setTimeout(() => {
            toast.style.display = 'none';
        }, 3000);
    },
    
    escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }
};

window.Admin = Admin;