// PIRP Command Palette (Ctrl+K / Cmd+K)
(function() {
    'use strict';

    var overlay = null;
    var input = null;
    var resultsList = null;
    var debounceTimer = null;
    var activeIndex = -1;
    var currentResults = [];

    var typeLabels = {
        invoice: 'Rechnungen',
        customer: 'Kunden',
        expense: 'Ausgaben',
        journal: 'Journal'
    };

    var typeIcons = {
        invoice: '\u25B8',
        customer: '\u25CF',
        expense: '\u25A0',
        journal: '\u25C6'
    };

    function create() {
        overlay = document.createElement('div');
        overlay.className = 'cmd-palette-overlay hidden';
        overlay.addEventListener('click', function(e) {
            if (e.target === overlay) close();
        });

        var modal = document.createElement('div');
        modal.className = 'cmd-palette';

        input = document.createElement('input');
        input.type = 'text';
        input.placeholder = 'Suche nach Rechnungen, Kunden, Ausgaben, Journal...';
        input.addEventListener('input', function() {
            clearTimeout(debounceTimer);
            debounceTimer = setTimeout(doSearch, 200);
        });
        input.addEventListener('keydown', handleKeydown);

        resultsList = document.createElement('div');
        resultsList.className = 'cmd-palette-results';

        modal.appendChild(input);
        modal.appendChild(resultsList);
        overlay.appendChild(modal);
        document.body.appendChild(overlay);
    }

    function open() {
        if (!overlay) create();
        overlay.classList.remove('hidden');
        input.value = '';
        resultsList.innerHTML = '';
        activeIndex = -1;
        currentResults = [];
        setTimeout(function() { input.focus(); }, 10);
    }

    function close() {
        if (overlay) overlay.classList.add('hidden');
    }

    function isOpen() {
        return overlay && !overlay.classList.contains('hidden');
    }

    function doSearch() {
        var q = input.value.trim();
        if (q.length < 2) {
            resultsList.innerHTML = '';
            activeIndex = -1;
            currentResults = [];
            return;
        }

        fetch('search_api.php?q=' + encodeURIComponent(q))
            .then(function(r) { return r.json(); })
            .then(function(data) {
                if (!data.ok) return;
                currentResults = data.results;
                activeIndex = -1;
                renderResults(data.results);
            })
            .catch(function() {});
    }

    function renderResults(results) {
        resultsList.innerHTML = '';
        if (!results.length) {
            var empty = document.createElement('div');
            empty.className = 'cmd-palette-empty';
            empty.textContent = 'Keine Ergebnisse';
            resultsList.appendChild(empty);
            return;
        }

        // Group by type
        var groups = {};
        var order = [];
        results.forEach(function(r) {
            if (!groups[r.type]) {
                groups[r.type] = [];
                order.push(r.type);
            }
            groups[r.type].push(r);
        });

        var idx = 0;
        order.forEach(function(type) {
            var header = document.createElement('div');
            header.className = 'cmd-palette-group';
            header.textContent = typeLabels[type] || type;
            resultsList.appendChild(header);

            groups[type].forEach(function(r) {
                var item = document.createElement('a');
                item.className = 'cmd-palette-item';
                item.href = r.url;
                item.setAttribute('data-idx', idx);

                var icon = document.createElement('span');
                icon.className = 'cmd-palette-icon';
                icon.textContent = typeIcons[r.type] || '\u25B8';
                item.appendChild(icon);

                var text = document.createElement('span');
                text.className = 'cmd-palette-text';

                var title = document.createElement('span');
                title.className = 'cmd-palette-title';
                title.textContent = r.title;
                text.appendChild(title);

                if (r.subtitle) {
                    var sub = document.createElement('span');
                    sub.className = 'cmd-palette-subtitle';
                    sub.textContent = r.subtitle;
                    text.appendChild(sub);
                }

                item.appendChild(text);
                item.addEventListener('mouseenter', function() {
                    setActive(parseInt(item.getAttribute('data-idx')));
                });
                resultsList.appendChild(item);
                idx++;
            });
        });
    }

    function setActive(idx) {
        var items = resultsList.querySelectorAll('.cmd-palette-item');
        items.forEach(function(el) { el.classList.remove('active'); });
        activeIndex = idx;
        if (idx >= 0 && idx < items.length) {
            items[idx].classList.add('active');
            items[idx].scrollIntoView({ block: 'nearest' });
        }
    }

    function handleKeydown(e) {
        var items = resultsList.querySelectorAll('.cmd-palette-item');
        var count = items.length;

        if (e.key === 'ArrowDown') {
            e.preventDefault();
            setActive(activeIndex < count - 1 ? activeIndex + 1 : 0);
        } else if (e.key === 'ArrowUp') {
            e.preventDefault();
            setActive(activeIndex > 0 ? activeIndex - 1 : count - 1);
        } else if (e.key === 'Enter') {
            e.preventDefault();
            if (activeIndex >= 0 && activeIndex < count) {
                window.location = items[activeIndex].href;
            }
        } else if (e.key === 'Escape') {
            e.preventDefault();
            close();
        }
    }

    // Global keyboard listener
    document.addEventListener('keydown', function(e) {
        if ((e.ctrlKey || e.metaKey) && e.key === 'k') {
            e.preventDefault();
            if (isOpen()) {
                close();
            } else {
                open();
            }
        }
        if (e.key === 'Escape' && isOpen()) {
            e.preventDefault();
            close();
        }
    });
})();