import fs from 'node:fs';

import { PNG } from 'pngjs';

const appConfigPath = new URL('../app.json', import.meta.url);
const appConfig = JSON.parse(fs.readFileSync(appConfigPath, 'utf8')).expo;
const appPath = new URL('../App.tsx', import.meta.url);
const appSource = fs.readFileSync(appPath, 'utf8');
const bridgePath = new URL('../src/mobileHostBridge.ts', import.meta.url);
const bridgeSource = fs.readFileSync(bridgePath, 'utf8');
const sharedContractPath = new URL(
  '../../../packages/shared/src/contracts/hostBridge.ts',
  import.meta.url,
);
const sharedContractSource = fs.readFileSync(sharedContractPath, 'utf8');
const packagePath = new URL('../package.json', import.meta.url);
const packageConfig = JSON.parse(fs.readFileSync(packagePath, 'utf8'));
const iconPath = new URL('../assets/icon.png', import.meta.url);
const icon = PNG.sync.read(fs.readFileSync(iconPath));

function extractStringArrayExport(source, exportName) {
  const match = source.match(
    new RegExp(`export const ${exportName}[^=]*= \\[([\\s\\S]*?)\\](?: as const)?;`),
  );
  if (!match) {
    throw new Error(`unable to read ${exportName}`);
  }

  const entries = [...match[1].matchAll(/'([^']+)'/g)].map(
    (entry) => entry[1],
  );
  if (match[1].includes('...HOST_BRIDGE_METHODS')) {
    return [
      ...extractStringArrayExport(source, 'HOST_BRIDGE_METHODS'),
      ...entries,
    ];
  }

  return entries;
}

const sharedCapabilities = extractStringArrayExport(
  sharedContractSource,
  'HOST_BRIDGE_CAPABILITIES',
);
const mobileCapabilities = extractStringArrayExport(
  bridgeSource,
  'MOBILE_HOST_CAPABILITIES',
);
const iosMobileCapabilities = extractStringArrayExport(
  bridgeSource,
  'IOS_MOBILE_HOST_CAPABILITIES',
);
const mobileCapabilitySet = new Set(mobileCapabilities);
const iosMobileCapabilitySet = new Set(iosMobileCapabilities);
const unknownMobileCapabilities = mobileCapabilities.filter(
  (capability) => !sharedCapabilities.includes(capability),
);
if (unknownMobileCapabilities.length > 0) {
  throw new Error(
    `mobile shell declares unknown HostBridge capabilities: ${unknownMobileCapabilities.join(', ')}`,
  );
}

const unknownIosMobileCapabilities = iosMobileCapabilities.filter(
  (capability) => !sharedCapabilities.includes(capability),
);
if (unknownIosMobileCapabilities.length > 0) {
  throw new Error(
    `iOS mobile shell declares unknown HostBridge capabilities: ${unknownIosMobileCapabilities.join(', ')}`,
  );
}

for (const capability of iosMobileCapabilities) {
  const switchCase = `case '${capability}':`;
  if (
    capability !== 'host.events' &&
    capability !== 'app.lifecycle' &&
    capability !== 'navigation.canGoBack' &&
    !bridgeSource.includes(switchCase)
  ) {
    throw new Error(
      `mobile shell declares ${capability} but does not handle it in HostBridge`,
    );
  }
}

if (appConfig.scheme !== 'genarrative') {
  throw new Error('mobile shell scheme must be genarrative');
}

if (appConfig.icon !== './assets/icon.png') {
  throw new Error('mobile shell must use the real brand icon asset');
}

if (icon.width < 512 || icon.height < 512) {
  throw new Error('mobile shell icon must be a production-size brand asset');
}

if (!appConfig.ios?.associatedDomains?.includes('applinks:app.genarrative.world')) {
  throw new Error('mobile shell iOS associated domain is missing');
}

const androidFilter = appConfig.android?.intentFilters?.find((filter) =>
  filter?.data?.some(
    (entry) =>
      entry?.scheme === 'https' &&
      entry?.host === 'app.genarrative.world',
  ),
);
if (!androidFilter) {
  throw new Error('mobile shell Android app link filter is missing');
}

for (const snippet of [
  'Linking.getInitialURL()',
  "Linking.addEventListener('url'",
  'buildMobileShellUrlFromDeepLink',
  'configureMobileHostBridgeNavigation',
  'AppState.addEventListener',
  'app.lifecycle',
  'navigation.canGoBack',
  'buildHostBridgeMessageScript',
]) {
  if (!appSource.includes(snippet)) {
    throw new Error(`mobile shell App missing ${snippet}`);
  }
}

for (const dependency of ['expo-file-system', 'expo-sharing']) {
  if (!packageConfig.dependencies?.[dependency]) {
    throw new Error(`mobile shell package missing ${dependency}`);
  }
}

for (const snippet of [
  'file.exportText',
  'file.exportImage',
  'Sharing.shareAsync',
  'normalizeHostBridgeExportFileName',
  'base64Data',
]) {
  if (!bridgeSource.includes(snippet)) {
    throw new Error(`mobile shell HostBridge missing ${snippet}`);
  }
}

const capabilityQuerySnippet = "capabilities: MOBILE_HOST_CAPABILITIES";
if (appSource.includes(capabilityQuerySnippet)) {
  throw new Error('mobile shell URL must resolve platform-aware capabilities');
}

if (!appSource.includes('capabilities: resolveMobileHostCapabilities()')) {
  throw new Error('mobile shell URL must use resolveMobileHostCapabilities()');
}

for (const capability of [
  'host.getRuntime',
  'appearance.getColorScheme',
  'share.open',
  'share.setTarget',
  'app.lifecycle',
  'navigation.openNativePage',
  'navigation.canGoBack',
  'app.openExternalUrl',
  'clipboard.writeText',
  'file.exportText',
  'file.exportImage',
  'haptics.impact',
]) {
  if (!mobileCapabilitySet.has(capability)) {
    throw new Error(`mobile shell capabilities missing ${capability}`);
  }
}

if (!iosMobileCapabilitySet.has('app.setBadgeCount')) {
  throw new Error('iOS mobile shell capabilities missing app.setBadgeCount');
}

if (mobileCapabilitySet.has('app.setBadgeCount')) {
  throw new Error('Android mobile shell base capabilities must not include app.setBadgeCount');
}

if (!bridgeSource.includes('Appearance.getColorScheme()')) {
  throw new Error('mobile shell HostBridge must read the native color scheme');
}