/* ═══════════════════════════════════════════════════════
   RECON // Curated Lists Controller (grouped by source)
   ═══════════════════════════════════════════════════════ */
(function () {
    'use strict';

    const API = '/api/awesomelist';
    const root = document.getElementById('awesomelistRoot');
    if (!root) return;

    let state = { view: 'index', sectors: [], searchTimeout: null };

    // ─── Utilities ───────────────────────────────────────
    function esc(s) {
        const d = document.createElement('div');
        d.textContent = s || '';
        return d.innerHTML;
    }

    function md(s) {
        if (!s) return '';
        let h = esc(s);
        h = h.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2" target="_blank" rel="noopener">$1</a>');
        h = h.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>');
        h = h.replace(/\*([^*]+)\*/g, '<em>$1</em>');
        h = h.replace(/`([^`]+)`/g, '<code>$1</code>');
        return h;
    }

    function fmt(n) {
        return n.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
    }

    // ─── API Fetch ───────────────────────────────────────
    async function api(endpoint) {
        const res = await fetch(API + endpoint);
        if (!res.ok) throw new Error(`API ${res.status}`);
        return res.json();
    }

    // ─── Render: Index View ──────────────────────────────
    function renderIndex(data) {
        state.view = 'index';
        state.sectors = data.sectors || [];

        let html = '';

        // Stats bar
        html += `<div class="crt-stats-bar">
            <div class="crt-stat"><span class="crt-stat-label">DATABASE</span><span class="crt-stat-value">● ONLINE</span></div>
            <div class="crt-stat"><span class="crt-stat-label">TOTAL ASSETS</span><span class="crt-stat-value">${fmt(data.total_entries)}</span></div>
            <div class="crt-stat"><span class="crt-stat-label">SECTORS</span><span class="crt-stat-value">${data.total_sectors}</span></div>
            <div class="crt-stat"><span class="crt-stat-label">STATUS</span><span class="crt-stat-value">● DECLASSIFIED</span></div>
        </div>`;

        // Search
        html += `<div class="crt-search-container">
            <span class="crt-search-icon">⌕</span>
            <input type="text" class="crt-search-input" id="crtSearch" placeholder="SEARCH ALL ASSETS..." autocomplete="off">
            <span class="crt-search-count" id="crtSearchCount"></span>
        </div>`;

        // Search results container
        html += `<div class="crt-search-results" id="crtSearchResults"></div>`;

        // Sector grid
        html += `<div class="crt-grid" id="crtGrid">`;
        for (const sec of state.sectors) {
            if (sec.entry_count === 0) continue;
            html += `<div class="crt-card" data-slug="${esc(sec.slug)}">
                <span class="crt-card-icon">${sec.icon}</span>
                <div class="crt-card-code">${esc(sec.code)}</div>
                <div class="crt-card-name">${esc(sec.name)}</div>
                <div class="crt-card-meta">
                    <span class="crt-card-count">${fmt(sec.entry_count)} assets</span>
                    <span class="crt-card-stars">${sec.subcategory_count} lists</span>
                </div>
                <div class="crt-card-status">● ACCESSIBLE</div>
            </div>`;
        }
        html += `</div>`;

        root.innerHTML = html;
        bindIndexEvents();
    }

    // ─── Render: Sector Detail ───────────────────────────
    function renderSector(sec) {
        state.view = 'detail';
        let html = '';

        // Back button
        html += `<div class="crt-back" id="crtBack">◄ BACK TO INDEX</div>`;

        // Detail header
        html += `<div class="crt-detail-header">
            <div class="crt-detail-code">${esc(sec.code)}</div>
            <div class="crt-detail-title">${esc(sec.icon)} ${esc(sec.name)}</div>
            <div class="crt-detail-meta">
                <span>${fmt(sec.total_entries)} ASSETS</span>
                <span>${sec.list_count} LISTS</span>
            </div>
        </div>`;

        // Search within sector
        html += `<div class="crt-search-container">
            <span class="crt-search-icon">⌕</span>
            <input type="text" class="crt-search-input" id="crtCatSearch" placeholder="FILTER THIS SECTOR..." autocomplete="off">
        </div>`;

        // List cards (one per source list)
        html += `<div class="crt-sub-grid" id="crtSubGrid">`;
        for (let i = 0; i < sec.lists.length; i++) {
            const lst = sec.lists[i];
            if (lst.total_entries === 0) continue;
            html += `<div class="crt-sub-card" data-list-idx="${i}">
                <div class="crt-sub-card-name">${esc(lst.name)}</div>
                <div class="crt-sub-card-stats">
                    <span>${lst.total_entries} items</span>
                    <span>${lst.subcategories.length} sections</span>
                </div>
            </div>`;
        }
        html += `</div>`;

        // Shared detail panel
        html += `<div class="crt-sub-detail" id="crtSubDetail" style="display:none">
            <div class="crt-sub-detail-header" id="crtSubDetailHeader"></div>
            <div class="crt-sub-detail-notes" id="crtSubDetailNotes"></div>
            <div class="crt-sub-detail-entries" id="crtSubDetailEntries"></div>
        </div>`;

        root.innerHTML = html;
        bindDetailEvents(sec);
    }

    // ─── Render: Single Entry ────────────────────────────
    function renderEntry(entry) {
        const starClass = entry.starred ? ' starred' : '';
        const starIcon = entry.starred ? '⭐' : '·';
        let html = `<div class="crt-entry${starClass}">`;
        html += `<span class="crt-entry-star">${starIcon}</span>`;
        html += `<div class="crt-entry-content">`;

        if (entry.url) {
            html += `<div class="crt-entry-name"><a href="${esc(entry.url)}" target="_blank" rel="noopener">${esc(entry.name || entry.url)}</a></div>`;
        } else if (entry.name) {
            html += `<div class="crt-entry-name">${md(entry.name)}</div>`;
        }

        if (entry.description) {
            html += `<div class="crt-entry-desc">${md(entry.description)}</div>`;
        }

        if (entry.extra_links && entry.extra_links.length > 0) {
            html += `<div class="crt-entry-extra">`;
            for (const link of entry.extra_links) {
                html += `<a href="${esc(link.url)}" target="_blank" rel="noopener">${esc(link.name)}</a>`;
            }
            html += `</div>`;
        }

        html += `</div></div>`;
        return html;
    }

    // ─── Render: Search Results ──────────────────────────
    function renderSearchResults(data) {
        const container = document.getElementById('crtSearchResults');
        const countEl = document.getElementById('crtSearchCount');
        const grid = document.getElementById('crtGrid');

        if (!data.results || data.results.length === 0) {
            container.innerHTML = data.query ? '<div class="crt-empty">NO MATCHING ASSETS FOUND</div>' : '';
            countEl.textContent = data.query ? '0 RESULTS' : '';
            if (grid) grid.style.display = data.query ? 'none' : '';
            return;
        }

        countEl.textContent = `${data.results.length} RESULTS`;
        if (grid) grid.style.display = 'none';

        let html = '';
        for (const r of data.results) {
            const starIcon = r.starred ? '⭐ ' : '';
            html += `<div class="crt-search-result">`;
            html += `<div class="crt-result-breadcrumb">${esc(r.sector_code)} // ${esc(r.sector_name)} / ${esc(r.subcategory)}</div>`;
            html += `<div class="crt-result-name">${starIcon}`;
            if (r.url) {
                html += `<a href="${esc(r.url)}" target="_blank" rel="noopener">${esc(r.name || r.url)}</a>`;
            } else {
                html += md(r.name);
            }
            html += `</div>`;
            if (r.description) {
                html += `<div class="crt-result-desc">${md(r.description)}</div>`;
            }
            html += `</div>`;
        }
        container.innerHTML = html;
    }

    // ─── Event Bindings: Index ───────────────────────────
    function bindIndexEvents() {
        document.querySelectorAll('.crt-card').forEach(card => {
            card.addEventListener('click', () => {
                loadSector(card.dataset.slug);
            });
        });

        const searchInput = document.getElementById('crtSearch');
        if (searchInput) {
            searchInput.addEventListener('input', () => {
                clearTimeout(state.searchTimeout);
                const q = searchInput.value.trim();
                if (q.length < 2) {
                    renderSearchResults({ query: '', results: [] });
                    return;
                }
                state.searchTimeout = setTimeout(async () => {
                    try {
                        const data = await api(`/search?q=${encodeURIComponent(q)}&limit=100`);
                        renderSearchResults(data);
                    } catch (e) {
                        console.warn('Search failed:', e);
                    }
                }, 300);
            });
        }
    }

    // ─── Event Bindings: Detail ──────────────────────────
    function bindDetailEvents(sec) {
        // Back button
        document.getElementById('crtBack').addEventListener('click', () => {
            loadIndex();
        });

        // List card clicks — show all subcategories and entries for that source list
        document.querySelectorAll('.crt-sub-card').forEach(card => {
            card.addEventListener('click', () => {
                const idx = parseInt(card.dataset.listIdx);
                const lst = sec.lists[idx];
                const panel = document.getElementById('crtSubDetail');
                const headerEl = document.getElementById('crtSubDetailHeader');
                const notesEl = document.getElementById('crtSubDetailNotes');
                const entriesEl = document.getElementById('crtSubDetailEntries');

                const wasActive = card.classList.contains('active');
                document.querySelectorAll('.crt-sub-card').forEach(c => c.classList.remove('active'));

                if (wasActive) {
                    panel.style.display = 'none';
                    return;
                }

                card.classList.add('active');

                // Header
                headerEl.innerHTML = `<span class="crt-sub-toggle">▾</span> <span class="crt-sub-detail-name">${esc(lst.name)}</span> <span class="crt-sub-count">${lst.total_entries} items across ${lst.subcategories.length} sections</span>`;

                notesEl.innerHTML = '';
                notesEl.style.display = 'none';

                // Build entries grouped by subcategory
                let eh = '';
                for (const sub of lst.subcategories) {
                    if (sub.entries.length === 0) continue;
                    // Strip the source prefix from subcategory name if it starts with list name
                    let subName = sub.name;
                    const prefix = lst.name + ' — ';
                    if (subName.startsWith(prefix)) {
                        subName = subName.slice(prefix.length);
                    }
                    if (subName === lst.name) subName = 'General';

                    eh += `<div class="crt-subcat-group">`;
                    eh += `<div class="crt-subcat-heading">${esc(subName)} <span class="crt-subcat-count">${sub.entries.length}</span></div>`;
                    for (const entry of sub.entries) eh += renderEntry(entry);
                    eh += `</div>`;
                }
                entriesEl.innerHTML = eh;

                panel.style.display = '';
                panel.scrollIntoView({ behavior: 'smooth', block: 'start' });
            });
        });

        // Local filter on list cards
        const catSearch = document.getElementById('crtCatSearch');
        if (catSearch) {
            catSearch.addEventListener('input', () => {
                const q = catSearch.value.trim().toLowerCase();
                document.querySelectorAll('.crt-sub-card').forEach(card => {
                    if (!q) {
                        card.style.display = '';
                        return;
                    }
                    const text = card.textContent.toLowerCase();
                    card.style.display = text.includes(q) ? '' : 'none';
                });
            });
        }
    }

    // ─── Load Functions ──────────────────────────────────
    async function loadIndex() {
        root.innerHTML = '<div class="crt-loading">ACCESSING RECON DATABASE...</div>';
        try {
            const data = await api('');
            renderIndex(data);
            history.pushState({ view: 'index' }, '', '/recon');
        } catch (e) {
            root.innerHTML = `<div class="crt-empty">DATABASE ACCESS DENIED // ${esc(e.message)}</div>`;
        }
    }

    async function loadSector(slug) {
        root.innerHTML = '<div class="crt-loading">DECRYPTING SECTOR DATA...</div>';
        try {
            const data = await api(`/${slug}`);
            renderSector(data);
            history.pushState({ view: 'detail', slug }, '', `/recon?sector=${slug}`);
            window.scrollTo({ top: 0, behavior: 'smooth' });
        } catch (e) {
            root.innerHTML = `<div class="crt-empty">SECTOR NOT FOUND // ${esc(e.message)}</div>`;
        }
    }

    // ─── Handle Back/Forward ─────────────────────────────
    window.addEventListener('popstate', (e) => {
        if (e.state && e.state.view === 'detail' && e.state.slug) {
            loadSector(e.state.slug);
        } else {
            loadIndex();
        }
    });

    // ─── Init ────────────────────────────────────────────
    function init() {
        const params = new URLSearchParams(window.location.search);
        const sector = params.get('sector');
        if (sector) {
            loadSector(sector);
        } else {
            loadIndex();
        }
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();