function createSaveButton() {
    const button = document.createElement('button');
    button.className = 'launchr-save-button';
    button.title = 'Salvar no Launchr'; // Tooltip ao passar o mouse
    
    // Adicionar ícone do Launchr
    const icon = document.createElement('img');
    icon.src = chrome.runtime.getURL('src/assets/icon16.png');
    icon.alt = 'Launchr';
    icon.className = 'launchr-icon';
    
    button.appendChild(icon);
    
    return button;
}

function extractPostData(postElement) {
    // Encontrar o autor
    const authorElement = postElement.querySelector('.feed-shared-actor__name, .update-components-actor__name');
    const author = authorElement?.textContent?.trim() || '';

    // Encontrar o link do perfil do autor
    const authorProfileLink = authorElement?.closest('a')?.href || '';

    // Encontrar o link do post
    const postLinkElement = postElement.querySelector('a[href*="/feed/update/"], a[data-control-name="share_link"]');
    const postLink = postLinkElement?.href || window.location.href;

    // Encontrar o conteúdo do post
    const contentElement = postElement.querySelector('.feed-shared-update-v2__description-wrapper, .feed-shared-update-v2__description, .feed-shared-text');
    const content = contentElement?.textContent?.trim() || '';

    return {
        author,
        authorProfileLink,
        postLink,
        content
    };
}

function addSaveButtonToPost(postElement) {
    // Verificar se o botão já existe
    if (postElement.querySelector('.launchr-save-button')) {
        return;
    }

    // Encontrar o menu de controle do post
    const controlMenu = postElement.querySelector('.feed-shared-control-menu, .feed-shared-update-v2__control-menu');
    if (!controlMenu) return;

    // Criar container para o botão (para manter o alinhamento)
    const buttonContainer = document.createElement('div');
    buttonContainer.className = 'display-flex align-items-center';
    
    // Criar e adicionar o botão
    const saveButton = createSaveButton();
    buttonContainer.appendChild(saveButton);

    // Inserir antes do menu de controle existente
    controlMenu.insertBefore(buttonContainer, controlMenu.firstChild);

    // Adicionar evento de clique
    saveButton.addEventListener('click', async (e) => {
        e.preventDefault();
        e.stopPropagation();
        
        try {
            saveButton.classList.add('saving');
            const postData = extractPostData(postElement);
            
            // Armazenar dados do post temporariamente
            chrome.storage.local.set({ currentPostData: postData }, () => {
                // Abrir o popup usando chrome.action
                chrome.runtime.sendMessage({ 
                    action: 'openPopupWithData',
                    data: postData 
                });
            });
            
            saveButton.classList.remove('saving');
        } catch (error) {
            console.error('Erro ao processar post:', error);
            saveButton.classList.remove('saving');
            alert('Erro ao processar o post. Por favor, tente novamente.');
        }
    });
}

// Observer para detectar novos posts
const observer = new MutationObserver((mutations) => {
    mutations.forEach((mutation) => {
        mutation.addedNodes.forEach((node) => {
            if (node instanceof Element) {
                // Procurar por posts no elemento adicionado
                const posts = node.querySelectorAll('.feed-shared-update-v2, .occludable-update');
                posts.forEach(addSaveButtonToPost);
            }
        });
    });
});

// Iniciar observação
observer.observe(document.body, {
    childList: true,
    subtree: true
});

// Adicionar botões aos posts existentes
document.querySelectorAll('.feed-shared-update-v2, .occludable-update').forEach(addSaveButtonToPost);