class SearchManager {
    constructor() {
        this.debounce = this.debounce.bind(this);
        this.handleSearch = this.handleSearch.bind(this);
        this.displayResults = this.displayResults.bind(this);
        this.clearResults = this.clearResults.bind(this);
        this.showFullResults = this.showFullResults.bind(this);
        this.hideDropDown = this.hideDropDown.bind(this);
        this.showDropDown = this.showDropDown.bind(this); // Add this line
        this.init();
    }

    debounce(func, delay) {
        let debounceTimer;
        return function () {
            const context = this;
            const args = arguments;
            clearTimeout(debounceTimer);
            debounceTimer = setTimeout(() => func.apply(context, args), delay);
        };
    }

    handleSearch() {
        let searchQuery = document.querySelector('.main-section .search-bar > input').value.trim();
        const invalidPattern = /(\"|\($|\b(AND|OR|NOT|NEAR)\b)$/i;
        const openParenthesesCount = (searchQuery.match(/\(/g) || []).length;
        const closeParenthesesCount = (searchQuery.match(/\)/g) || []).length;
    
        if (invalidPattern.test(searchQuery) || openParenthesesCount !== closeParenthesesCount) {
            console.warn("Invalid search query. Please ensure proper use of operators and matching parentheses.");
            return; 
        }
    
        if (searchQuery.length > 0) {
            MadCap.SearchHelper.SearchPane.Search(searchQuery, { searchContent: true })
                .then(this.displayResults)
                .catch(error => {
                    console.error("Search failed: ", error);
                });
        } else {
            this.clearResults();
        }
    }

    displayResults(results) {
        const dropdown = document.getElementById('searchResultsDropdown');
        dropdown.style.visibility = "visible"; // Ensure the dropdown is visible
        dropdown.innerHTML = '';
        const searchQuery = document.querySelector('.main-section .search-bar > input').value.trim(); // Get the current search query
    
        results.content.slice(0, 5).forEach(item => {
            const resultItem = document.createElement('li');
            const title = document.createElement('div');
            title.classList.add('title');
            title.textContent = item.Title;
            resultItem.appendChild(title);
            const preview = document.createElement('div');
            preview.classList.add('preview');
            preview.textContent = item.AbstractText;
            resultItem.appendChild(preview);
            resultItem.addEventListener('click', () => {
                // Append ?Highlight={searchword} to the URL
                const urlWithHighlight = `${item.Link}?Highlight=${encodeURIComponent(searchQuery)}`;
                window.location.href = urlWithHighlight;
            });
            dropdown.appendChild(resultItem);
        });
    
        if (results.content.length > 5) {
            const showAll = document.createElement('li');
            showAll.textContent = 'Showing 5 results. For all results, press ENTER';
            showAll.addEventListener('click', this.showFullResults);
            // Append this first so it's at the top:
            dropdown.insertBefore(showAll, dropdown.firstChild);
        }
    }
    
    displayAllResults(results) {
        const dropdown = document.getElementById('searchResultsDropdown');
        dropdown.innerHTML = '';
        const searchQuery = document.querySelector('.main-section .search-bar > input').value.trim(); // Get the current search query
    
        results.content.forEach(item => {
            const resultItem = document.createElement('li');
            const title = document.createElement('div');
            title.classList.add('title');
            title.textContent = item.Title;
            resultItem.appendChild(title);
            const preview = document.createElement('div');
            preview.classList.add('preview');
            preview.textContent = item.AbstractText;
            resultItem.appendChild(preview);
            resultItem.addEventListener('click', () => {
                // Append ?Highlight={searchword} to the URL
                const urlWithHighlight = `${item.Link}?Highlight=${encodeURIComponent(searchQuery)}`;
                window.location.href = urlWithHighlight;
            });
            dropdown.appendChild(resultItem);
        });
    }
    

    clearResults() {
        const dropdown = document.getElementById('searchResultsDropdown');
        dropdown.innerHTML = '';
    }

    showFullResults() {
        // Implementation for showing full results
    }


    hideDropDown(event) {
        const searchResultsDropdown = document.getElementById('searchResultsDropdown');
        if (!event.target.closest(".search-field")) {
            searchResultsDropdown.style.visibility = "hidden";
        }
    }

    showDropDown() { // Add this method
        const searchResultsDropdown = document.getElementById('searchResultsDropdown');
        searchResultsDropdown.style.visibility = "visible";
    }

    init() {
        $(document).ready(() => {
            const searchInput = document.querySelector('.main-section .search-bar > input');
            searchInput.addEventListener('input', this.debounce(this.handleSearch, 300));
            searchInput.addEventListener('focus', this.showDropDown); // Add this line
            const dropdown = document.createElement('ul');
            dropdown.id = 'searchResultsDropdown';
            document.querySelector('.main-section .search-bar').appendChild(dropdown);
        });

        document.addEventListener("click", this.hideDropDown);
    }
}

new SearchManager();