// components/TopBar.ts
import { createElement, navigateTo, isLoggedInUser } from '../utils/utils';
import { globalAPI, ApiResponse, ProfileResponseData } from '../api/api'; // Import API and types (now exported)

export class TopBar {
    private container: HTMLElement;
    private menuItems: Array<HTMLElement>;
    private profileDropdownVisible: boolean = false;
    private profileData: ProfileResponseData | null = null;

    constructor() {
        this.container = createElement('nav');
        this.menuItems = [];
        this.container.classList.add('top-bar', 'navbar', 'navbar-expand-lg', 'navbar-light', 'bg-darker', 'mb-3', 'px-4');
        this.fetchProfileData();
    }

    async fetchProfileData() {
        if (isLoggedInUser()) {
            try {
                const response: ApiResponse<ProfileResponseData> = await globalAPI.getProfile('mockUserId');
                if (response.success && response.data) {
                    this.profileData = response.data;
                    this.render();
                } else {
                    console.error("Failed to fetch profile data");
                }
            } catch (error) {
                console.error("Error fetching profile data:", error);
            }
        }
    }

    addMenuItem(text: string, href: string) {
        const menuItem = createElement('li');
        menuItem.classList.add('nav-item');
        const itemLink = createElement('a');
        itemLink.classList.add('nav-link');

        itemLink.href = href;
        itemLink.textContent = text;

        menuItem.appendChild(itemLink);
        this.menuItems.push(menuItem)
    }

    render(): HTMLElement {
        this.container.innerHTML = '';

        const navbarBrand = createElement('a');
        navbarBrand.classList.add('navbar-brand');
        navbarBrand.href = '#/dashboard';
        navbarBrand.textContent = 'LMS';

        const navbarToggler = createElement('button');
        navbarToggler.classList.add('navbar-toggler');
        navbarToggler.type = 'button';
        navbarToggler.setAttribute('data-bs-toggle', 'collapse');
        navbarToggler.setAttribute('data-bs-target', '#navbarNav');
        navbarToggler.setAttribute('aria-controls', 'navbarNav');
        navbarToggler.setAttribute('aria-expanded', 'false');
        navbarToggler.setAttribute('aria-label', 'Toggle navigation');
        navbarToggler.innerHTML = '<span class="navbar-toggler-icon"></span>';

        const navbarCollapse = createElement('div');
        navbarCollapse.classList.add('collapse', 'navbar-collapse');
        navbarCollapse.id = 'navbarNav';

        const menuPages = createElement('ul');
        menuPages.classList.add('navbar-nav', 'me-auto', 'mb-2', 'mb-lg-0');

        for (const item of this.menuItems) {
            menuPages.appendChild(item);
        }

        const profileSection = createElement('div');
        profileSection.classList.add('d-flex', 'align-items-center', 'ms-auto');

        if (this.profileData) {
            const profileButton = createElement('button');
            profileButton.classList.add('btn', 'btn-dark', 'dropdown-toggle');
            profileButton.type = 'button';
            profileButton.id = 'profileDropdownButton';
            profileButton.setAttribute('data-bs-toggle', 'dropdown');
            profileButton.setAttribute('aria-expanded', String(this.profileDropdownVisible));

            const profileImage = createElement('img'); // Placeholder image, replace with actual profile picture logic
            profileImage.src = this.profileData.profilePicture || 'src/assets/vite.svg'; // Default placeholder if no picture
            profileImage.alt = 'Profile Picture';
            profileImage.style.width = '30px';
            profileImage.style.height = '30px';
            profileImage.style.borderRadius = '50%';
            profileImage.style.marginRight = '5px';

            const fullNameSpan = createElement('span');
            fullNameSpan.textContent = this.profileData.fullName;

            profileButton.appendChild(profileImage);
            profileButton.appendChild(fullNameSpan);

            const dropdownMenu = createElement('ul');
            dropdownMenu.classList.add('dropdown-menu', 'dropdown-menu-end');
            dropdownMenu.setAttribute('aria-labelledby', 'profileDropdownButton');

            const userIdItem = createElement('li');
            userIdItem.innerHTML = `<span class="dropdown-item-text">ID: ${this.profileData.schoolId}</span>`;
            dropdownMenu.appendChild(userIdItem);

            const divider = createElement('li');
            divider.innerHTML = '<hr class="dropdown-divider">';
            dropdownMenu.appendChild(divider);

            const profileMenuItem = createElement('li');
            const profileLink = createElement('a');
            profileLink.classList.add('dropdown-item');
            profileLink.href = '#/profile';
            profileLink.textContent = 'Profile';
            profileMenuItem.appendChild(profileLink);
            dropdownMenu.appendChild(profileMenuItem);

            const accountSettingsMenuItem = createElement('li');
            const accountSettingsLink = createElement('a');
            accountSettingsLink.classList.add('dropdown-item');
            accountSettingsLink.href = '#/profile'; // Same profile page, modal will be triggered there
            accountSettingsLink.setAttribute('data-action', 'open-account-settings'); // Custom attribute to trigger modal
            accountSettingsLink.textContent = 'Account settings';
            accountSettingsMenuItem.appendChild(accountSettingsLink);
            dropdownMenu.appendChild(accountSettingsMenuItem);

            const logoutMenuItem = createElement('li');
            const logoutButton = createElement('button');
            logoutButton.classList.add('dropdown-item');
            logoutButton.textContent = 'Log out';
            logoutButton.addEventListener('click', async () => {
                await globalAPI.logout();
                navigateTo('/login'); // Redirect to login page after logout
            });
            logoutMenuItem.appendChild(logoutButton);
            dropdownMenu.appendChild(logoutMenuItem);

            profileSection.appendChild(profileButton);
            profileSection.appendChild(dropdownMenu);
        } else {
            // Fallback if profile data is not loaded (or not logged in, though TopBar is for logged-in users)
            const loginLink = createElement('a');
            loginLink.classList.add('btn', 'btn-primary');
            loginLink.href = '#/login';
            loginLink.textContent = 'Login';
            profileSection.appendChild(loginLink);
        }


        navbarCollapse.appendChild(menuPages);
        navbarCollapse.appendChild(profileSection);

        this.container.appendChild(navbarBrand);
        this.container.appendChild(navbarToggler);
        this.container.appendChild(navbarCollapse);


        return this.container;
    }

    getContainer(): HTMLElement {
        return this.container;
    }
}