/**
 * Blocknotes Application Main JavaScript (Vanilla JS)
 */

document.addEventListener("DOMContentLoaded", function() {

    // --- 1. MODALS OPEN & CLOSE HANDLERS ---
    document.querySelectorAll('[data-modal-target]').forEach(function(trigger) {
        trigger.addEventListener('click', function(e) {
            e.preventDefault();
            const modalId = this.getAttribute('data-modal-target');
            const modal = document.getElementById(modalId);
            if (modal) {
                modal.classList.add('active');
            }
        });
    });

    document.querySelectorAll('.modal-close-btn, .modal-close-trigger').forEach(function(closeBtn) {
        closeBtn.addEventListener('click', function() {
            const modal = this.closest('.modal-backdrop');
            if (modal) {
                modal.classList.remove('active');
            }
        });
    });

    // Close modal when clicking on backdrop outside modal-card
    document.querySelectorAll('.modal-backdrop').forEach(function(backdrop) {
        backdrop.addEventListener('click', function(e) {
            if (e.target === this) {
                this.classList.remove('active');
            }
        });
    });

    // --- 2. LIVE HSL THEME COLOR PREVIEW (PROFILE PAGE) ---
    const priInput = document.getElementById('theme_pri');
    const secInput = document.getElementById('theme_sec');
    const thiInput = document.getElementById('theme_thi');

    if (priInput && secInput && thiInput) {
        function updateLiveTheme() {
            const priVal = priInput.value;
            const secVal = secInput.value;
            const thiVal = thiInput.value;

            document.documentElement.style.setProperty('--pri', priVal);
            document.documentElement.style.setProperty('--sec', secVal);
            document.documentElement.style.setProperty('--thi', thiVal);

            const priValDisp = document.getElementById('pri_val');
            const secValDisp = document.getElementById('sec_val');
            const thiValDisp = document.getElementById('thi_val');
            if (priValDisp) priValDisp.textContent = priVal + '°';
            if (secValDisp) secValDisp.textContent = secVal + '°';
            if (thiValDisp) thiValDisp.textContent = thiVal + '°';
        }

        priInput.addEventListener('input', updateLiveTheme);
        secInput.addEventListener('input', updateLiveTheme);
        thiInput.addEventListener('input', updateLiveTheme);
    }
});

/**
 * Copy text to clipboard with fallback and localized feedback
 */
function copyToClipboard(btnElement, textToCopy) {
    if (navigator.clipboard && window.isSecureContext) {
        navigator.clipboard.writeText(textToCopy).then(() => {
            handleCopySuccess(btnElement);
        }).catch(() => {
            fallbackCopyText(btnElement, textToCopy);
        });
    } else {
        fallbackCopyText(btnElement, textToCopy);
    }
}

function fallbackCopyText(btnElement, textToCopy) {
    let textArea = document.createElement("textarea");
    textArea.value = textToCopy;
    textArea.style.position = "fixed";
    textArea.style.left = "-999999px";
    document.body.appendChild(textArea);
    textArea.focus();
    textArea.select();
    try {
        document.execCommand('copy');
        handleCopySuccess(btnElement);
    } catch (err) {
        console.error('Fallback copy failed', err);
    }
    document.body.removeChild(textArea);
}

function handleCopySuccess(btnElement) {
    if (!btnElement) return;
    const originalHTML = btnElement.innerHTML;
    const copiedLabel = btnElement.getAttribute('data-copied-text') || '✓ Copiato!';
    btnElement.innerHTML = copiedLabel;
    btnElement.classList.add('copied');
    setTimeout(() => {
        btnElement.innerHTML = originalHTML;
        btnElement.classList.remove('copied');
    }, 2000);
}

/**
 * Toggle collapse state for a specific note block
 */
function toggleNoteCollapse(noteId) {
    const noteBlock = document.getElementById('note-block-' + noteId);
    if (noteBlock) {
        noteBlock.classList.toggle('collapsed');
    }
}

/**
 * Expand all note blocks on page
 */
function expandAllNotes() {
    document.querySelectorAll('.note-block').forEach(function(nb) {
        nb.classList.remove('collapsed');
    });
}

/**
 * Collapse all note blocks on page
 */
function collapseAllNotes() {
    document.querySelectorAll('.note-block').forEach(function(nb) {
        nb.classList.add('collapsed');
    });
}

/**
 * Filter notes and subnotes within the current blocknote in real-time
 */
function filterCurrentBlocknoteNotes(query) {
    const term = query.toLowerCase().trim();
    const clearBtn = document.getElementById('clear-search-btn');
    const noResults = document.getElementById('no-search-results');
    const noteBlocks = document.querySelectorAll('.note-block');
    
    if (clearBtn) {
        clearBtn.style.display = term ? 'inline-flex' : 'none';
    }

    let totalMatches = 0;

    noteBlocks.forEach(function(noteBlock) {
        if (!term) {
            // Reset search
            noteBlock.style.display = '';
            noteBlock.classList.add('collapsed');
            noteBlock.querySelectorAll('.subnote-card').forEach(function(sub) {
                sub.style.display = '';
            });
            totalMatches++;
            return;
        }

        const noteTitle = (noteBlock.querySelector('.note-title-wrapper h3')?.innerText || '').toLowerCase();
        const noteDesc = (noteBlock.querySelector('.note-description-box p')?.innerText || '').toLowerCase();
        const noteTitleMatch = noteTitle.includes(term) || noteDesc.includes(term);

        let subnoteMatchCount = 0;
        const subnoteCards = noteBlock.querySelectorAll('.subnote-card');

        subnoteCards.forEach(function(subCard) {
            const subTitle = (subCard.querySelector('.subnote-title')?.innerText || '').toLowerCase();
            const subContent = (subCard.querySelector('.subnote-content-text, .command-code')?.innerText || '').toLowerCase();
            
            if (noteTitleMatch || subTitle.includes(term) || subContent.includes(term)) {
                subCard.style.display = '';
                subnoteMatchCount++;
            } else {
                subCard.style.display = 'none';
            }
        });

        if (noteTitleMatch || subnoteMatchCount > 0) {
            noteBlock.style.display = '';
            noteBlock.classList.remove('collapsed'); // Auto expand on match
            totalMatches++;
        } else {
            noteBlock.style.display = 'none';
        }
    });

    if (noResults) {
        if (term && totalMatches === 0) {
            noResults.style.display = 'block';
        } else {
            noResults.style.display = 'none';
        }
    }
}

/**
 * Clear search input and restore view
 */
function clearNoteSearch() {
    const input = document.getElementById('note-search-input');
    if (input) {
        input.value = '';
        filterCurrentBlocknoteNotes('');
    }
}