// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

var test = require('prova');
var serve = require('./serve');
var Promise = require('../../src/lib/promise');

test('Test sync dispatcher the echos suffixes - ' +
  'dispatcher/echo/<suffix>', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: callbackDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    client.bindTo(ctx, 'dispatcherServiceName/echo/bar',
      function(err, service) {
      if (err) {
        assert.error(err);
        res.end(assert);
        return;
      }

      service.echo(ctx, function(err, result) {
        assert.error(err);

        assert.equal(result, 'bar');
        res.end(assert);
      });
    });
  });
});

test('Test sync dispatcher that counts length of suffix - ' +
  'dispatcherServiceName/count/<suffix> - one suffix', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: promiseDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    client.bindTo(ctx, 'dispatcherServiceName/count/bar',
      function(err, service) {
      if (err) {
        return assert.end(err);
      }

      service.count(ctx, function(err, result) {
        assert.error(err);

        assert.equal(result, 3);
        res.end(assert);
      });
    });
  });
});

test('Test sync dispatcher that counts length of suffix - ' +
  'dispatcherServiceName/count/<suffix> - two different suffixes',
  function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: promiseDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    var promises = [
      client.bindTo(ctx, 'dispatcherServiceName/count/bar')
      .then(function(client) {
        return client.count(ctx);
      }),
      client.bindTo(ctx, 'dispatcherServiceName/count/longer')
      .then(function(client) {
        return client.count(ctx);
      })
    ];

    Promise.all(promises).then(function(results) {
      assert.equal(results[0], 3);
      assert.equal(results[1], 6);
      res.end(assert);
    })
    .catch(function(err) {
      assert.error(err);
      res.end(assert);
    });
  });
});

test('Test unknown suffix should return error - ' +
  'dispatcherServiceName/unknown', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: callbackDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    client.bindTo(ctx, 'dispatcherServiceName/unknown',
      function(err, service) {
      assert.ok(err, 'should fail');
      res.end(assert);
    });
  });
});

test('Test async dispatcher using promises - ' +
  'dispatcher/promise ' +
  '- success case', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: promiseDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var ctx = res.runtime.getContext();
    var name = 'dispatcherServiceName/promise/whatever';
    var client = res.runtime.getClient();
    client.bindTo(ctx, name, function(err, service) {
      if (err) {
        return assert.end(err);
      }

      service.echo(ctx, function(err, result) {
        assert.error(err);
        assert.equal(result, 'promise/whatever');
        res.end(assert);
      });
    });
  });
});

test('Test async dispatcher using promises - ' +
  'dispatcherServiceName/promise/fail ' +
  '- failure case', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: promiseDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    client.bindTo(ctx, 'dispatcherServiceName/promise/fail',
      function(err, service) {
      assert.ok(err, 'should fail');
      res.end(assert);
    });
  });
});

test('Test async dispatcher using callbacks - ' +
  'dispatcherServiceName/callback ' +
  '- success case', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: callbackDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var ctx = res.runtime.getContext();

    var name = 'dispatcherServiceName/callback/whatever';
    var client = res.runtime.getClient();
    client.bindTo(ctx, name, function(err, service) {
      if (err) {
        return assert.end(err);
      }

      service.echo(ctx, function(err, result) {
        assert.error(err);
        assert.equal(result, 'callback/whatever');
        res.end(assert);
      });
    });
  });
});

test('Test async dispatcher using callbacks - '+
  'dispatcherServiceName/callback/fail ' +
  '- failure case', function(assert) {
  serve({
    name: 'dispatcherServiceName',
    dispatcher: callbackDispatcher,
    autoBind: false
  }, function(err, res) {
    if (err) {
      return assert.end(err);
    }

    var client = res.runtime.getClient();
    var ctx = res.runtime.getContext();
    client.bindTo(ctx, 'dispatcherServiceName/callback/fail',
      function(err, service) {
      assert.ok(err, 'should fail');
      res.end(assert);
    });
  });
});

function Counter(string) {
  this.string = string;
}

Counter.prototype.count = function(ctx, serverCall) {
  return this.string.length;
};

function Echoer(string) {
  this.string = string;
}

Echoer.prototype.echo = function(ctx, serverCall) {
  return this.string;
};

function promiseDispatcher(suffix) {
  // dispatcher/echo/:string
  if (suffix.indexOf('echo/') === 0) {
    return {
      service: new Echoer(suffix.substr(5))
    };
  // dispatcher/count/:string
  } else if (suffix.indexOf('count/') === 0) {
    return {
      service: new Counter(suffix.substr(6))
    };
  // dispatcher/promise/fail
  } else if (suffix.indexOf('promise/fail') === 0) {
    return Promise.reject(new Error('bad'));
  // dispatcher/promise/:string
  } else if (suffix.indexOf('promise') === 0) {
    return Promise.resolve({
      service: new Echoer(suffix)
    });
  }

  throw new Error('unknown suffix');
}

function callbackDispatcher(suffix, cb) {
  // dispatcher/echo/:string
  if (suffix.indexOf('echo/') === 0) {
    cb(null, {
      service: new Echoer(suffix.substr(5))
    });
    return;
  // dispatcher/count/:string
  } else if (suffix.indexOf('count/') === 0) {
    cb(null, {
      service: new Counter(suffix.substr(6))
    });
    return;
  // dispatcher/callback/fail
  } else if (suffix.indexOf('callback/fail') === 0) {
    cb(new Error('errorback'));
    return;
  // dispatcher/callback/:string
  } else if (suffix.indexOf('callback') === 0) {
    cb(null, { service: new Echoer(suffix)});
    return;
  }

  throw new Error('unknown suffix');
}