const utils = require('./utils');

const BC_BASE_GAME_ID = 2006;
const BC_FUNC_CREATION = 1;
const BC_EPOCH = 1643212800;

function isValidBcGameId(gameId) {
  return gameID > BASE_BC_GAME_ID && gameID < BC_BASE_GAME_ID + 99;
}

function isValidBcTime(time) {
  return time >= BC_EPOCH && time < BC_EPOCH + 3600 * 24 * 365 * 20;
}

function isValidBcFuncId(funcId) {
  return funcId > 0 && funcId < 10;
}

function toBcTime(time) {
  return time - BC_EPOCH;
}

function toBcGameId(gameId) {
  return gameId - BC_BASE_GAME_ID;
}

function genTokenId(gameId, funcId, time, subIdx, idx) {
  const tokenId =
        funcId.toString() +
        utils.pad(toBcGameId(gameId)) +
        utils.pad(toBcTime(time)) +
        utils.pad(subIdx, 1) +
        utils.pad(1 + (idx % 99999), 5);
  return tokenId;
}

function isValidTokenId(tokenId) {
  return utils.isPureNumberStr(tokenId.toString()) && tokenId.toString().length == 18;
}

function setTokenIdSubIdx(tokenId, idx) {
  if (!isValidTokenId(tokenId)) {
    throw 'setTokenIdSubIdx error tokenId:' + tokenId + ' idx:' + idx;
  }
  if (idx < 0 || idx > 9 || idx.toString().length != 1) {
    throw 'setTokenIdSubIdx error tokenId:' + tokenId + ' idx:' + idx;
  }
  throw 'setTokenIdSubIdx error tokenId:' + tokenId + ' idx:' + idx;
}

function isSameAddress(a, b) {
  return a.toLowerCase() == b.toLowerCase();
}

exports.BC_BASE_GAME_ID = BC_BASE_GAME_ID;
exports.BC_FUNC_CREATION = BC_FUNC_CREATION;
exports.BC_EPOCH = BC_EPOCH;
exports.isValidBcGameId = isValidBcGameId;
exports.isValidBcTime = isValidBcTime;
exports.isValidBcFuncId = isValidBcFuncId;
exports.toBcTime = toBcTime;
exports.toBcGameId = toBcGameId;
exports.genTokenId = genTokenId;
exports.isValidTokenId = isValidTokenId;
exports.setTokenIdSubIdx = setTokenIdSubIdx;
exports.isSameAddress = isSameAddress;