// Z-AMPP MAM bridge. On boot, reads ?asset=<uuid> from URL and imports it.
// Also exports pickFromMAM() for an in-app picker.

type MAMAsset = { id: string; display_name?: string; filename?: string; };

async function getStreamURL(assetId: string): Promise<string> {
  const r = await fetch('/api/v1/assets/' + assetId + '/stream', { credentials: 'omit' });
  if (!r.ok) throw new Error('stream lookup failed: ' + r.status);
  const j = await r.json();
  if (!j || !j.url) throw new Error('stream lookup: no url');
  return j.url;
}

async function listAssets(limit = 200): Promise<MAMAsset[]> {
  const r = await fetch('/api/v1/assets?limit=' + limit, { credentials: 'omit' });
  if (!r.ok) throw new Error('list assets failed: ' + r.status);
  const j = await r.json();
  return (j && j.assets) || [];
}

function getMediaBridge(): any {
  const w = window as any;
  return w.__mediaBridge || w.mediaBridge || w.MediaBridge || (w.editor && w.editor.mediaBridge) || null;
}

async function importAsset(assetId: string, name?: string): Promise<void> {
  const url = await getStreamURL(assetId);
  let bridge = getMediaBridge();
  if (!bridge || typeof bridge.importFromURL !== 'function') {
    await new Promise(r => setTimeout(r, 500));
    bridge = getMediaBridge();
  }
  if (!bridge || typeof bridge.importFromURL !== 'function') {
    throw new Error('MediaBridge.importFromURL not available');
  }
  return bridge.importFromURL(url, name || (assetId + '.mp4'));
}

export async function pickFromMAM(): Promise<void> {
  const assets = await listAssets(200);
  const overlay = document.createElement('div');
  Object.assign(overlay.style, { position:'fixed',inset:'0',background:'rgba(0,0,0,0.72)',zIndex:'999999',display:'flex',alignItems:'center',justifyContent:'center' } as CSSStyleDeclaration);
  const modal = document.createElement('div');
  Object.assign(modal.style, { width:'min(960px,92vw)',maxHeight:'84vh',background:'#161618',color:'#e8e8ea',borderRadius:'12px',padding:'16px',display:'flex',flexDirection:'column',gap:'12px',overflow:'hidden' } as CSSStyleDeclaration);
  modal.innerHTML = '<div style="display:flex;justify-content:space-between;align-items:center"><strong>Import from Z-AMPP MAM</strong><button data-close style="background:#2a2a2e;color:#fff;border:0;border-radius:6px;padding:6px 10px;cursor:pointer">Close</button></div>';
  const grid = document.createElement('div');
  Object.assign(grid.style, { display:'grid',gridTemplateColumns:'repeat(auto-fill,minmax(180px,1fr))',gap:'10px',overflowY:'auto',padding:'4px' } as CSSStyleDeclaration);
  for (const a of assets) {
    const card = document.createElement('button');
    Object.assign(card.style, { background:'#1f1f23',border:'1px solid #2c2c32',borderRadius:'8px',padding:'6px',color:'#e8e8ea',cursor:'pointer',display:'flex',flexDirection:'column',gap:'6px',textAlign:'left' } as CSSStyleDeclaration);
    const label = a.display_name || a.filename || a.id;
    card.innerHTML = '<img loading="lazy" src="/api/v1/assets/' + a.id + '/thumbnail" style="width:100%;aspect-ratio:16/9;object-fit:cover;background:#000;border-radius:4px" onerror="this.style.opacity=0.2"/><span style="font-size:12px;line-height:1.2;word-break:break-word">' + label + '</span>';
    card.addEventListener('click', async () => { card.disabled = true; card.style.opacity='0.5'; try { await importAsset(a.id, label); } catch(e){ alert('Import failed: '+(e as Error).message); } finally { card.disabled=false; card.style.opacity='1'; } });
    grid.appendChild(card);
  }
  modal.appendChild(grid);
  overlay.appendChild(modal);
  document.body.appendChild(overlay);
  const close = () => overlay.remove();
  overlay.addEventListener('click', (e) => { if (e.target === overlay) close(); });
  modal.querySelector('[data-close]')?.addEventListener('click', close);
}

export function initMAMBridge(): void {
  try {
    const qs = new URLSearchParams(window.location.search);
    const projectId = qs.get('project');
    if (projectId) { try { window.localStorage.setItem('mamProjectId', projectId); } catch {} }
    (window as any).__zamppPickFromMAM = pickFromMAM;
    const assetId = qs.get('asset');
    if (!assetId) return;
    const tryImport = async (n = 0): Promise<void> => {
      try { await importAsset(assetId); console.log('[mam-bridge] imported', assetId); }
      catch (e) {
        if (n < 10) setTimeout(() => tryImport(n + 1), 500);
        else console.error('[mam-bridge] import retries exhausted', e);
      }
    };
    if (document.readyState === 'complete') tryImport();
    else window.addEventListener('load', () => tryImport());
  } catch (e) { console.error('[mam-bridge] init failed', e); }
}

initMAMBridge();