var Keypairs = require('./');

/* global Promise*/
Keypairs.parseOrGenerate({ key: '' }).then(function (pair) {
  // should NOT have any warning output
  if (!pair.private || !pair.public) {
    throw new Error("missing key pairs");
  }

  return Promise.all([
    // Testing Public Part of key
    Keypairs.export({ jwk: pair.public }).then(function (pem) {
      if (!/--BEGIN PUBLIC/.test(pem)) {
        throw new Error("did not export public pem");
      }
      return Promise.all([
        Keypairs.parse({ key: pem }).then(function (pair) {
          if (pair.private) {
            throw new Error("shouldn't have private part");
          }
          return true;
        })
      , Keypairs.parse({ key: pem, private: true }).then(function () {
          var err = new Error("should have thrown an error when private key was required and public pem was given");
          err.code = 'NOERR';
          throw err;
        }).catch(function (e) {
          if ('NOERR' === e.code) { throw e; }
          return true;
        })
      ]).then(function () {
        return true;
      });
    })
    // Testing Private Part of Key
  , Keypairs.export({ jwk: pair.private }).then(function (pem) {
      if (!/--BEGIN .*PRIVATE KEY--/.test(pem)) {
        throw new Error("did not export private pem: " + pem);
      }
      return Promise.all([
        Keypairs.parse({ key: pem }).then(function (pair) {
          if (!pair.private) {
            throw new Error("should have private part");
          }
          if (!pair.public) {
            throw new Error("should have public part also");
          }
          return true;
        })
      , Keypairs.parse({ key: pem, public: true }).then(function (pair) {
          if (pair.private) {
            throw new Error("should NOT have private part");
          }
          if (!pair.public) {
            throw new Error("should have the public part though");
          }
          return true;
        })
      ]).then(function () {
        return true;
      });
    })
  , Keypairs.parseOrGenerate({ key: 'not a key', public: true }).then(function (pair) {
      // SHOULD have warning output
      if (!pair.private || !pair.public) {
        throw new Error("missing key pairs (should ignore 'public')");
      }
      return true;
    })
  , Keypairs.parse({ key: JSON.stringify(pair.private) }).then(function (pair) {
      if (!pair.private || !pair.public) {
        throw new Error("missing key pairs (stringified jwt)");
      }
      return true;
    })
  , Keypairs.parse({ key: JSON.stringify(pair.private), public: true }).then(function (pair) {
      if (pair.private) {
        throw new Error("has private key when it shouldn't");
      }
      if (!pair.public) {
        throw new Error("doesn't have public key when it should");
      }
      return true;
    })
  , Keypairs.parse({ key: JSON.stringify(pair.public), private: true }).then(function () {
      var err = new Error("should have thrown an error when private key was required and public jwk was given");
      err.code = 'NOERR';
      throw err;
    }).catch(function (e) {
      if ('NOERR' === e.code) { throw e; }
      return true;
    })
  , Keypairs.signJwt({ jwk: pair.private, alg: 'ES512', iss: 'https://example.com/', exp: '1h' }).then(function (jwt) {
      var parts = jwt.split('.');
      var now = Math.round(Date.now()/1000);
      var token = {
        header: JSON.parse(Buffer.from(parts[0], 'base64'))
      , payload: JSON.parse(Buffer.from(parts[1], 'base64'))
      , signature: parts[2] //Buffer.from(parts[2], 'base64')
      };
      // allow some leeway just in case we happen to hit a 1ms boundary
      if (token.payload.exp - now > 60 * 59.99) {
        return true;
      }
      throw new Error("token was not properly generated");
    })
  ]).then(function (results) {
    if (results.length && results.every(function (v) { return true === v; })) {
      console.info("If a warning prints right above this, it's a pass");
      console.log("PASS");
      process.exit(0);
    } else {
      throw new Error("didn't get all passes (but no errors either)");
    }
  });
}).catch(function (e) {
  console.error("Caught an unexpected (failing) error:");
  console.error(e);
  process.exit(1);
});