window.initSearch = function() {
    initSearchModal();
    initInlineSearch();
};

function loadSearchIndex() {
    if (!window.searchIndex) {
        return fetch('/index.json')
            .then(response => response.json())
            .then(data => {
                window.searchIndex = data;
                return data;
            })
            .catch(err => console.error('Failed to load search index:', err));
    }
    return Promise.resolve(window.searchIndex);
}

function initSearchModal() {
    var searchBtn = document.getElementById('search-btn');
    var searchModal = document.getElementById('search-modal');
    
    if (searchBtn && searchModal) {
        // Clone to remove old listeners
        var newSearchBtn = searchBtn.cloneNode(true);
        searchBtn.parentNode.replaceChild(newSearchBtn, searchBtn);
        searchBtn = newSearchBtn;

        searchBtn.addEventListener('click', function() {
            searchModal.classList.add('show');
            var input = document.getElementById('search-input');
            if (input) setTimeout(function() { input.focus(); }, 100);
            
            loadSearchIndex();
        });

        // Close logic
        var closeBtn = searchModal.querySelector('.close-search');
        if (closeBtn) {
            closeBtn.onclick = function() {
                searchModal.classList.remove('show');
            };
        }
        
        // Click outside to close
        searchModal.onclick = function(e) {
            if (e.target === searchModal) {
                searchModal.classList.remove('show');
            }
        };

        // Search Input Logic
        var searchInput = document.getElementById('search-input');
        var searchResults = document.getElementById('search-results');
        
        if (searchInput && searchResults) {
            // Clone input to remove old listeners
             var newInput = searchInput.cloneNode(true);
             searchInput.parentNode.replaceChild(newInput, searchInput);
             searchInput = newInput;

            // Clone results to remove old listeners
             var newResults = searchResults.cloneNode(true);
             searchResults.parentNode.replaceChild(newResults, searchResults);
             searchResults = newResults;

            // Close modal when a result is clicked
            searchResults.addEventListener('click', function(e) {
                if (e.target.closest('a')) {
                    searchModal.classList.remove('show');
                }
            });

            searchInput.addEventListener('input', function() {
                var query = this.value.trim().toLowerCase();
                if (!window.searchIndex || query.length === 0) {
                    searchResults.innerHTML = '<p class="search-tip">输入关键词并回车进行搜索</p>';
                    return;
                }

                var results = window.searchIndex.filter(function(item) {
                    return (item.title && item.title.toLowerCase().includes(query)) || 
                           (item.summary && item.summary.toLowerCase().includes(query));
                });

                if (results.length > 0) {
                    var html = results.map(function(item) {
                        return `
                            <div class="search-result-item">
                                <a href="${item.permalink}" class="search-result-title">${item.title}</a>
                                <span class="search-result-date">${item.date}</span>
                                <div class="search-result-summary">${item.summary || ''}</div>
                            </div>
                        `;
                    }).join('');
                    searchResults.innerHTML = html;
                    
                    // Refresh PJAX to recognize new links
                    if (window.pjax) {
                        window.pjax.refresh(searchResults);
                    }
                } else {
                    searchResults.innerHTML = '<p class="search-tip">未找到相关文章</p>';
                }
            });
        }
    }
}

function initInlineSearch() {
    var header = document.getElementById('essay-header');
    var searchContainer = document.getElementById('search-container');
    var input = document.getElementById('inline-search-input');
    var resultsContainer = document.getElementById('inline-search-results');
    
    window.toggleSearchMode = function(show) {
        if (!header || !searchContainer || !input || !resultsContainer) return;
        
        if (show) {
            header.style.display = 'none';
            searchContainer.style.display = 'block';
            input.focus();
            loadSearchIndex();
        } else {
            header.style.display = 'inline-flex'; 
            searchContainer.style.display = 'none';
            input.value = '';
            resultsContainer.classList.remove('show');
            resultsContainer.innerHTML = '';
        }
    };

    if (!header || !searchContainer || !input || !resultsContainer) return;

    // Input Event
    var newInput = input.cloneNode(true);
    input.parentNode.replaceChild(newInput, input);
    input = newInput;

    input.addEventListener('input', function() {
        var query = this.value.trim().toLowerCase();
        
        if (query.length === 0) {
            resultsContainer.classList.remove('show');
            resultsContainer.innerHTML = '';
            return;
        }

        if (!window.searchIndex) return;

        var results = window.searchIndex.filter(function(item) {
            return (item.title && item.title.toLowerCase().includes(query)) || 
                   (item.summary && item.summary.toLowerCase().includes(query));
        });

        if (results.length > 0) {
            var html = results.slice(0, 5).map(function(item) {
                return `
                    <a href="${item.permalink}" class="search-result-item" style="display:block; text-decoration:none;" onclick="window.toggleSearchMode(false)">
                        <span class="search-result-title">${item.title}</span>
                        <div style="display:flex; align-items:center;">
                             <span class="search-result-date">${item.date}</span>
                        </div>
                    </a>
                `;
            }).join('');
            
            resultsContainer.innerHTML = html;
            resultsContainer.classList.add('show');
            
            // PJAX Refresh
             if (window.pjax) {
                 window.pjax.refresh(resultsContainer);
             }
        } else {
            resultsContainer.innerHTML = '<div class="search-result-item" style="text-align:center;color:#999;cursor:default;">无搜索结果</div>';
            resultsContainer.classList.add('show');
        }
    });

    // Close on click outside
    if (!window.inlineSearchClickOutside) {
        window.inlineSearchClickOutside = function(e) {
            var header = document.getElementById('essay-header');
            var searchContainer = document.getElementById('search-container');
            var resultsContainer = document.getElementById('inline-search-results');
            
            if (header && searchContainer && resultsContainer && searchContainer.style.display === 'block') {
                 if (!searchContainer.contains(e.target) && !header.contains(e.target) && !resultsContainer.contains(e.target)) {
                    window.toggleSearchMode(false);
                }
            }
        };
        document.addEventListener('click', window.inlineSearchClickOutside);
    }
}