function encodeRoutePart(value = '') {
  return encodeURIComponent(String(value || '').trim());
}

function decodeRoutePart(value = '') {
  try {
    return decodeURIComponent(String(value || ''));
  } catch {
    return String(value || '');
  }
}

const SHINE_ROUTE_SEGMENT = 'SHiNE';

export function normalizeLogin(value = '') {
  return String(value || '').trim().replace(/^@+/, '');
}

export function extractLoginFromBlockchainName(value = '') {
  const raw = String(value || '').trim();
  const match = raw.match(/^(.+)-\d+$/);
  if (!match) return normalizeLogin(raw);
  return normalizeLogin(String(match[1] || ''));
}

export function makeProfileRoute(login = '') {
  const clean = normalizeLogin(login);
  return clean ? `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(clean)}` : 'profile';
}

export function makeProfileLinksRoute(login = '') {
  const clean = normalizeLogin(login);
  return clean ? `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(clean)}/links` : 'network/keep-history';
}

export function makeProfileChannelsRoute(login = '', scope = 'all') {
  const clean = normalizeLogin(login);
  if (!clean) return 'channels/feed';
  const normalizedScope = String(scope || '').trim().toLowerCase();
  if (normalizedScope === 'owned') return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(clean)}/channels/owned`;
  if (normalizedScope === 'following') return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(clean)}/channels/following`;
  return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(clean)}/channels`;
}

export function makeShineChannelRoute({ ownerLogin = '', ownerBlockchainName = '', channelName = '', messageBlockNumber = '' }) {
  const ownerBch = String(ownerBlockchainName || '').trim();
  const chName = String(channelName || '').trim();
  const msgNo = String(messageBlockNumber || '').trim();
  if (!ownerBch || !chName) return '';
  if (msgNo) return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(ownerBch)}/${encodeRoutePart(chName)}/${encodeRoutePart(msgNo)}`;
  return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(ownerBch)}/${encodeRoutePart(chName)}`;
}

export function makeShineChannelRootRoute({ ownerBlockchainName = '', channelRootBlockNumber = '', channelRootBlockHash = '' }) {
  const ownerBch = String(ownerBlockchainName || '').trim();
  const rootNo = String(channelRootBlockNumber || '').trim();
  const rootHash = String(channelRootBlockHash || '').trim();
  if (!ownerBch || !rootNo || !rootHash) return '';
  return `channel/${encodeRoutePart(ownerBch)}/${encodeRoutePart(rootNo)}/${encodeRoutePart(rootHash)}`;
}

export function makeShineChannelAboutRoute({ ownerBlockchainName = '', channelRootBlockNumber = '', channelRootBlockHash = '' }) {
  const base = makeShineChannelRootRoute({ ownerBlockchainName, channelRootBlockNumber, channelRootBlockHash });
  return base ? `${base}/about` : '';
}

export function makeShineChannelShortRoute({ ownerBlockchainName = '', channelName = '' }) {
  const ownerBch = String(ownerBlockchainName || '').trim();
  const chName = String(channelName || '').trim();
  if (!ownerBch || !chName) return '';
  return `${encodeRoutePart(ownerBch)}/${encodeRoutePart(chName)}`;
}

export function makeShineMessageRoute({ ownerLogin = '', messageBlockchainName = '', messageBlockNumber = '' }) {
  const msgBch = String(messageBlockchainName || '').trim();
  const msgNo = String(messageBlockNumber || '').trim();
  if (!msgBch || !msgNo) return '';
  return `${SHINE_ROUTE_SEGMENT}/${encodeRoutePart(msgBch)}/${encodeRoutePart(msgNo)}`;
}

export function parseShineRouteParts(segments = []) {
  const parts = Array.isArray(segments) ? segments.map((value) => String(value || '').trim()) : [];
  if (!parts.length) return null;

  if (String(parts[0] || '').toLowerCase() === SHINE_ROUTE_SEGMENT.toLowerCase()) {
    const entity = normalizeLogin(decodeRoutePart(parts[1] || ''));
    if (!entity) return null;
    return { entity, offset: 2, format: 'slash' };
  }

  const raw = String(parts[0] || '').trim();
  const legacyPrefix = `${SHINE_ROUTE_SEGMENT}.`;
  if (!raw.toLowerCase().startsWith(legacyPrefix.toLowerCase())) return null;
  return {
    entity: normalizeLogin(decodeRoutePart(raw.slice(legacyPrefix.length))),
    offset: 1,
    format: 'dot',
  };
}