const { contextBridge, ipcRenderer } = require('electron');

// ── Inject styles for Electron titlebar overlay compatibility ─────────────────
// Adds top padding so the 38px system buttons don't cover the site's nav bar.
// Also makes the nav bar draggable so the user can move the window.
window.addEventListener('DOMContentLoaded', () => {
  const style = document.createElement('style');
  style.textContent = `
    /* Reserve space for Windows titlebar overlay (38px) */
    body { padding-top: 38px !important; }
    /* Make the top nav draggable (window drag region) */
    .topnav {
      -webkit-app-region: drag !important;
      margin-top: -38px !important;
      padding-top: 38px !important;
      height: calc(var(--nav, 52px) + 38px) !important;
      /* Reserve right side for min/max/close buttons (≈138px on Windows) */
      padding-right: 148px !important;
      box-sizing: border-box !important;
    }
    /* All interactive elements inside the nav must NOT be drag targets */
    .topnav *, .topnav button, .topnav a, .topnav input,
    .topnav [onclick], .topnav [tabindex] {
      -webkit-app-region: no-drag !important;
    }
    /* Hide Windows download prompts — already in the app */
    .sb-dl-app, .dl-app-banner, #dl-app-banner,
    [class*="dl-app"], [id*="dl-app"] {
      display: none !important;
    }
    /* Push fullscreen player close button below the 38px native titlebar */
    .fs-overlay .fs-top {
      padding-top: 46px !important;
    }
  `;
  document.head.appendChild(style);
});

// ── Minimal Electron API (future extensibility) ───────────────────────────────
contextBridge.exposeInMainWorld('electronApp', {
  isElectron:  true,
  getVersion:  () => ipcRenderer.invoke('get-version'),
  storeGet:    (k)    => ipcRenderer.invoke('store-get', k),
  storeSet:    (k, v) => ipcRenderer.invoke('store-set', k, v),
  storeDelete: (k)    => ipcRenderer.invoke('store-delete', k),
  // DRM cache management (can be called from the site's settings page)
  cacheSize:   ()  => ipcRenderer.invoke('cache-size'),
  cacheClear:  ()  => ipcRenderer.invoke('cache-clear'),
});