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// pages/HomePage.js - Home page functionality for SPA
import { createTeamMember } from '../main.js';
import { createArtifactCarousel } from '../components/Carousel.js';
import { getFeaturedArtifacts } from '../init.js';
import { teamMembers } from '../data/team.js';
import { renderAreaCard } from '../components/Card.js';
import { renderHomeNavigation } from '../components/PageNavigation.js';
import { renderContentSection, renderOpennessCallout } from '../components/ContentSection.js';
import { initializeStickyNavigation } from '../utils/stickyNavigation.js';

// Use global areasData and backgrounds (loaded in index.html <head>)
const areasData = window.areasData;
const homeBackgroundImage = window.homeBackgroundImage;

// Helper function to create inline styled links
function createInlineLink(text, href, colorClass = '', tooltip = '') {
    const baseClass = 'inline-block px-2.5 py-1 mx-0.5 text-sm font-semibold rounded hover:opacity-90 transition-opacity no-underline border';
    const titleAttr = tooltip ? ` title="${tooltip}"` : '';
    
    // Map color classes to darker variants and add border colors
    const enhancedColorClass = colorClass
        .replace('bg-yellow-100', 'bg-yellow-200 border-yellow-300')
        .replace('bg-blue-100', 'bg-blue-200 border-blue-300')
        .replace('bg-green-100', 'bg-green-200 border-green-300')
        .replace('bg-purple-100', 'bg-purple-200 border-purple-300')
        .replace('bg-orange-100', 'bg-orange-200 border-orange-300')
        .replace('text-yellow-800', 'text-yellow-900')
        .replace('text-blue-800', 'text-blue-900')
        .replace('text-green-800', 'text-green-900')
        .replace('text-purple-800', 'text-purple-900')
        .replace('text-orange-800', 'text-orange-900');
    
    return `<a href="${href}" class="${baseClass} ${enhancedColorClass}"${titleAttr}>${text}</a>`;
}

export function renderHomePage() {
    const content = `
        <!-- Top spacing -->
        <div class="mb-8"></div>
        
        ${renderHomeNavigation()}
        
        ${renderContentSection('about-and-works', `
            <h3 id="about" class="text-xl md:text-2xl font-bold text-gray-900 mb-4 text-center">
              AI, ML, and Society
            </h3>
            
            <div class="space-y-4 text-gray-900 mb-10">
                <div class="text-base">
                    Artificial Intelligence has evolved rapidly over the last five years from a hidden foundation of digital infrastructure to a ubiquitous consumer-facing technology, expanding its societal roles and interactions; 
                    and with it, the need for structures that enable all concerned parties to understand, verify, and broadly participate in its design, including notably when looking to:
                </div>
                
                <!-- Compact, elegant list with strong visual identity -->
                <ul class="my-8 ml-12">
                    <li class="relative pl-12 py-3 border-l-2 border-green-200/60 hover:border-green-300 transition-colors">
                        <span class="absolute left-[-0.6rem] top-[1.1rem] w-4 h-4 rounded-full bg-white border-2 border-green-300 shadow-sm"></span>
                        <div class="text-base leading-loose font-medium">
                            The ${createInlineLink('Sustainability', '/sustainability', areasData.sustainability.color, areasData.sustainability.description.short)} of the technology, through better
                            ${createInlineLink('measurement', '/sustainability#measuring', areasData.sustainability.topics.measuring.color, areasData.sustainability.topics.measuring.description.short)} and
                            ${createInlineLink('efficiency', '/sustainability#efficiency', areasData.sustainability.topics.efficiency.color, areasData.sustainability.topics.efficiency.description.short)} techniques.
                        </div>
                    </li>
                    
                    <li class="relative pl-12 py-3 border-l-2 border-purple-200/60 hover:border-purple-300 transition-colors">
                        <span class="absolute left-[-0.6rem] top-[1.1rem] w-4 h-4 rounded-full bg-white border-2 border-purple-300 shadow-sm"></span>
                        <div class="text-base leading-loose font-medium">
                            The ${createInlineLink('Agency', '/agency', areasData.agency.color, areasData.agency.description.short)} of
                            ${createInlineLink('individuals', '/agency#personal', areasData.agency.topics.personal.color, areasData.agency.topics.personal.description.short)} and
                            ${createInlineLink('communities', '/agency#community', areasData.agency.topics.community.color, areasData.agency.topics.community.description.short)} in their interactions with AI.
                        </div>
                    </li>
                    
                    <li class="relative pl-12 py-3 border-l-2 border-orange-200/60 hover:border-orange-300 transition-colors">
                        <span class="absolute left-[-0.6rem] top-[1.1rem] w-4 h-4 rounded-full bg-white border-2 border-orange-300 shadow-sm"></span>
                        <div class="text-base leading-loose font-medium">
                            The ${createInlineLink('Ecosystems', '/ecosystems', areasData.ecosystems.color, areasData.ecosystems.description.short)} that shape AI,
                            including ${createInlineLink('economic', '/ecosystems#economy', areasData.ecosystems.topics.economy.color, areasData.ecosystems.topics.economy.description.short)} and
                            ${createInlineLink('regulatory', '/ecosystems#regulation', areasData.ecosystems.topics.regulation.color, areasData.ecosystems.topics.regulation.description.short)} and the impact of
                            ${createInlineLink('concentrations of resources', '/ecosystems#power', areasData.ecosystems.topics.power.color, areasData.ecosystems.topics.power.description.short)} on these.
                        </div>
                    </li>
                </ul>
                
                <div class="text-base pt-4">
                    This website presents the work of the ${createInlineLink('Machine Learning and Society', 'https://huggingface.co/hfmlsoc', 'bg-blue-100 text-blue-800')} team at Hugging Face on these topics.
                    Our approach is rooted in open production of research and tools and in leveraging the unique contributions of open models, datasets, and research.
                    We actively invite partners from all areas of expertise to reach out and collaborate.
                </div>
            </div>
            
            <h3 id="recent-works" class="text-xl md:text-2xl font-bold text-gray-900 mb-8 text-center mt-8 pt-8 border-t border-gray-200">Recent & Featured Works</h3>
            <div id="featured-artifacts-carousel" class="overflow-x-auto -mx-2">
                <!-- Carousel will be inserted here -->
            </div>
        `)}

        ${renderContentSection('areas-and-team', `
            <h3 id="research-areas" class="text-xl md:text-2xl font-bold text-gray-900 mb-8 text-center">Research Areas</h3>
            <div id="research-areas-grid" class="grid grid-cols-1 md:grid-cols-3 gap-4 sm:gap-6 mb-8">
                <!-- Area cards will be inserted here by JavaScript -->
            </div>
            
            <h3 id="team" class="text-xl md:text-2xl font-bold text-gray-900 mb-8 text-center mt-8 pt-8 border-t border-gray-200">Team Members</h3>
            <div id="team-grid" class="grid grid-cols-1 md:grid-cols-2 gap-4 sm:gap-6 mb-6">
                <!-- Team members will be inserted here by JavaScript -->
            </div>
            <div class="prose text-base max-w-none text-gray-700 pt-4 border-t border-gray-200">
                <p>We also work closely with 
                    <a href="https://huggingface.co/irenesolaiman" class="text-blue-600 hover:text-blue-800 transition-colors" target="_blank">Irene Solaiman</a> (Chief Policy Officer), 
                    <a href="https://huggingface.co/evijit" class="text-blue-600 hover:text-blue-800 transition-colors" target="_blank">Avijit Ghosh</a> (Applied Policy Researcher) in the policy team, 
                    <a href="https://huggingface.co/meg" class="text-blue-600 hover:text-blue-800 transition-colors" target="_blank">Meg Mitchell</a> (Chief Ethics Scientist), 
                    and <a href="https://huggingface.co/brunatrevelin" class="text-blue-600 hover:text-blue-800 transition-colors" target="_blank">Bruna Trevelin</a> (Legal Counsel)!
                </p>
            </div>
        `)}
    `;

    return {
        content,
        init: () => {
            initializeTeamMembers();
            initializeHomeAreaCards();
            initializeArtifactCarousels();
            initializeBackgroundAttribution();
            initializeStickyNavigation('nav-container');
        }
    };
}

function initializeTeamMembers() {
    const teamContainer = document.getElementById('team-grid');
    if (!teamContainer) {
        return;
    }

    teamContainer.innerHTML = teamMembers.map(member => 
        createTeamMember(member.name, member.role, member.username, member.tags)
    ).join('');
}

function initializeHomeAreaCards() {
    const areasContainer = document.getElementById('research-areas-grid');
    if (!areasContainer) return;

    const areas = Object.values(areasData);
    areasContainer.innerHTML = areas.map(area => createResearchAreaCard(area)).join('');
}

function createResearchAreaCard(area) {
    // Use the unified Card component
    return renderAreaCard(area);
}

function initializeArtifactCarousels() {
    const carouselContainer = document.getElementById('featured-artifacts-carousel');
    if (!carouselContainer) return;
    
    // Get featured artifacts dynamically from the loaded JSON data
    const featuredArtifacts = getFeaturedArtifacts();
    createArtifactCarousel(featuredArtifacts, 'featured-artifacts-carousel');
}

function initializeBackgroundAttribution() {
    const backgroundContainer = document.getElementById('home-background-container');
    const attribution = document.getElementById('home-bg-attribution');
    
    if (!backgroundContainer || !attribution) {
        return;
    }

    // Show attribution on hover over the background container
    backgroundContainer.addEventListener('mouseenter', () => {
        attribution.style.opacity = '1';
    });

    backgroundContainer.addEventListener('mouseleave', () => {
        attribution.style.opacity = '0';
    });
}