'use strict';
/*global Promise*/

module.exports.create = function () {
  throw new Error("greenlock-store-test is a test fixture for greenlock-store-* plugins, not a plugin itself");
};

// ignore all of this, it's just to normalize Promise vs node-style callback thunk vs synchronous
function promiseCheckAndCatch(obj, name, mergables) {
  var promisify = require('util').promisify;
  // don't loose this-ness, just in case that's important
  var fn = obj[name].bind(obj);
  var promiser;

  // function signature must match, or an error will be thrown
  if (1 === fn.length) {
    // wrap so that synchronous errors are caught (alsa handles synchronous results)
    promiser = function (opts) {
      return Promise.resolve().then(function () {
        return fn(merge(mergables, opts));
      });
    };
  } else if (2 === fn.length) {
    // wrap as a promise
    promiser = promisify(function (opts, cb) {
      return fn(merge(mergables, opts), cb);
    });
  } else {
    return Promise.reject(new Error("'store." + name + "' should accept either one argument, the options,"
      + " and return a Promise or accept two arguments, the options and a node-style callback thunk"));
  }

  function shouldntBeNull(result) {
    if ('undefined' === typeof result) {
      throw new Error("'store.'" + name + "' should never return `undefined`. Please explicitly return null"
        + " (or fix the place where a value should have been returned but wasn't).");
    }
    return result;
  }

  return function (opts) {
    return promiser(opts).then(shouldntBeNull);
  };
}
function merge(one, two) {
  var three = {};
  Object.keys(one||{}).forEach(function (k) {
    if ('undefined' !== typeof one[k]) {
      three[k] = one[k];
    }
  });
  Object.keys(two||{}).forEach(function (k) {
    if ('undefined' !== typeof two[k]) {
      three[k] = two[k];
    }
  });
  return three;
}

// Here's the meat, where the tests are happening:
module.exports.test = function (store) {
  var subject = '*.example.com';
  var email = 'jon.doe@sbemail.com';

  // TODO go just barely beyond dumb storage and provide real keys using 'keypairs.js'
  var accountKey = { privateKeyPem: 'AccountKey', privateKeyJwk: { account: true } };
  var domainKey = { privateKeyPem: 'DomainKey', privateKeyJwk: { domain: true } };
  var domainCert = {
    cert: 'DomainCert', chain: 'DomainChain', privkey: 'DomainKey'
  , subject: '*.example.com', altnames: ['*.example.com', 'example.com']
  , issuedAt: new Date().valueOf(), expiresAt: new Date(Date.now() + 3600000).valueOf()
  };

  var checkCerts = promiseCheckAndCatch(store.certificates, 'check', store.options);
  var checkCertKey = promiseCheckAndCatch(store.certificates, 'checkKeypair', store.options);
  var checkAccountKey = promiseCheckAndCatch(store.accounts, 'checkKeypair', store.options);
  var setAccountKey = promiseCheckAndCatch(store.accounts, 'setKeypair', store.options);
  var setCertKey = promiseCheckAndCatch(store.certificates, 'setKeypair', store.options);
  var setCert = promiseCheckAndCatch(store.certificates, 'set', store.options);

  return checkCerts({ certificate: {}, subject: subject }).then(function (results) {
    if (null !== results) {
      throw new Error("should get null when checking certificates for " + subject);
    }
  }).then(function () {
    // TODO check accounts.check
    var opts = { account: {}, email: email, subject: subject, certificate: {} };
    return checkAccountKey(opts).then(function (results) {
      if (null !== results) {
        throw new Error("should not have an account keypair for " + subject);
      }
    });
  }).then(function () {
    var opts = { account: {}, email: email, keypair: accountKey, subject: subject, certificate: {} };
    return setAccountKey(opts).then(function (results) {
      if ('undefined' === typeof results) {
        throw new Error("should never get undefined as a return value, did you forget to return?");
      }
    });
  }).then(function () {
    var opts = { certificate: {}, subject: subject, keypair: domainKey, email: email, account: {} };
    return setCertKey(opts).then(function (results) {
      if ('undefined' === typeof results) {
        throw new Error("should never get undefined as a return value, did you forget to return?");
      }
    });
  }).then(function () {
    var opts = { certificate: {}, subject: subject, pems: domainCert, email: email, account: {} };
    return setCert(opts).then(function (results) {
      if ('undefined' === typeof results) {
        throw new Error("should never get undefined as a return value, did you forget to return?");
      }
    });
  }).then(function () {
    var opts = { certificate: {}, subject: subject, email: email, account: {} };
    return checkCerts(opts).then(function (results) {
      if (!results || !results.chain || !results.cert) {
        throw new Error("expected to get certificate and chain for " + subject);
      }
      if (domainCert.cert.replace(/\r\n/g, '\n').trim() !== results.cert.replace(/\r\n/g, '\n').trim()) {
        throw new Error("expected to get exactly the same certificate (aside from CRLF and ending newline) as was set");
      }
      if (domainCert.chain.replace(/\r\n/g, '\n').trim() !== results.chain.replace(/\r\n/g, '\n').trim()) {
        throw new Error("expected to get exactly the same chain (aside from CRLF and ending newline) as was set");
      }
      if (results.privkey) {
        if (domainCert.chain.replace(/\r\n/g, '\n').trim() !== results.chain.replace(/\r\n/g, '\n').trim()) {
          throw new Error("privkey is optional, but when it's set it should be the same string PEM as was set");
        }
      }
      if (results.altnames) {
        if (domainCert.altnames.join(' ') !== results.altnames.join(' ')) {
          throw new Error("altnames sholud be the same type and value as was set");
        }
      }
      if (results.subject) {
        if (domainCert.subject !== results.subject) {
          throw new Error("subject sholud be the same type and value as was set");
        }
      }
      if (results.issuedAt) {
        if (domainCert.issuedAt !== results.issuedAt) {
          throw new Error("issuedAt sholud be the same type and value as was set");
        }
      }
      if (results.expiresAt) {
        if (domainCert.expiresAt !== results.expiresAt) {
          throw new Error("expiresAt sholud be the same type and value as was set");
        }
      }
    });
  }).then(function () {
    var opts = { certificate: {}, subject: subject, email: email, account: {} };
    return checkCertKey(opts).then(function (results) {
      if (!results) {
        throw new Error("Should have found a keypair for " + opts.subject);
      }
      if (!results.privateKeyPem && !results.privateKeyJwk) {
        throw new Error("Should have received privateKeyPem and/or privateKeyJwk, but got neither: "
          + JSON.stringify(results));
      }
      if (results.privateKeyPem) {
        if (domainCert.privkey.replace(/\r\n/g, '\n').trim() !== results.privateKeyPem.replace(/\r\n/g, '\n').trim()) {
          throw new Error("privateKeyPem should be the same string PEM as was set");
        }
      }
      if (results.privateKeyJwk) {
        if (Object.keys(domainKey.privateKeyJwk).sort().join(' ')
          !== Object.keys(results.privateKeyJwk).sort().join(' ')
        ) {
          throw new Error("privateKeyJwk should be the same string Jwk as was set");
        }
      }
    });
  }).then(function () {
    var opts = { account: {}, email: email, subject: subject, certificate: {} };
    return checkAccountKey(opts).then(function (results) {
      if (!results) {
        throw new Error("Should have found a keypair for " + opts.email);
      }
      if (!results.privateKeyPem && !results.privateKeyJwk) {
        throw new Error("Should have received privateKeyPem and/or privateKeyJwk, but got neither: "
          + JSON.stringify(results));
      }
      if (results.privateKeyPem) {
        if (accountKey.privateKeyPem.replace(/\r\n/g, '\n').trim()
          !== results.privateKeyPem.replace(/\r\n/g, '\n').trim()
        ) {
          throw new Error("privateKeyPem should be the same string PEM as was set");
        }
      }
      if (results.privateKeyJwk) {
        var akeys = Object.keys(accountKey.privateKeyJwk).sort().join(' ');
        var bkeys = Object.keys(results.privateKeyJwk).sort().join(' ');
        if (akeys !== bkeys) {
          throw new Error("privateKeyJwk should be the same string Jwk as was set."
            + "\nExpected: " + akeys + "\nActual: " + bkeys);
        }
      }
    });
  });
};