/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

Components.utils.import("resource://gre/modules/Http.jsm");
Components.utils.import("resource://testing-common/httpd.js");

const BinaryInputStream = Components.Constructor("@mozilla.org/binaryinputstream;1",
  "nsIBinaryInputStream", "setInputStream");

var server;

const kDefaultServerPort = 9000;
const kSuccessPath = "/success";
const kBaseUrl = "http://localhost:" + kDefaultServerPort;
const kSuccessUrl = kBaseUrl + kSuccessPath;

const kPostPath = "/post";
const kPostUrl = kBaseUrl + kPostPath;
const kPostDataSent = [["foo", "bar"], ["complex", "!*()@"]];
const kPostDataReceived = "foo=bar&complex=%21%2A%28%29%40";
const kPostMimeTypeReceived = "application/x-www-form-urlencoded; charset=utf-8";

const kJsonPostPath = "/json_post";
const kJsonPostUrl = kBaseUrl + kJsonPostPath;
const kJsonPostData = JSON.stringify(kPostDataSent);
const kJsonPostMimeType = "application/json";

const kPutPath = "/put";
const kPutUrl = kBaseUrl + kPutPath;
const kPutDataSent = [["P", "NP"]];
const kPutDataReceived = "P=NP";

const kGetPath = "/get";
const kGetUrl = kBaseUrl + kGetPath;

function successResult(aRequest, aResponse) {
  aResponse.setStatusLine(null, 200, "OK");
  aResponse.setHeader("Content-Type", "application/json");
  aResponse.write("Success!");
}

function getDataChecker(aExpectedMethod, aExpectedData, aExpectedMimeType = null) {
  return function(aRequest, aResponse) {
    let body = new BinaryInputStream(aRequest.bodyInputStream);
    let bytes = [];
    let avail;
    while ((avail = body.available()) > 0)
      Array.prototype.push.apply(bytes, body.readByteArray(avail));

    do_check_eq(aRequest.method, aExpectedMethod);

    // Checking if the Content-Type is as expected.
    if (aExpectedMimeType) {
      let contentType = aRequest.getHeader("Content-Type");
      do_check_eq(contentType, aExpectedMimeType);
    }

    var data = String.fromCharCode.apply(null, bytes);

    do_check_eq(data, aExpectedData);

    aResponse.setStatusLine(null, 200, "OK");
    aResponse.setHeader("Content-Type", "application/json");
    aResponse.write("Success!");
  }
}

add_test(function test_successCallback() {
  do_test_pending();
  let options = {
    onLoad: function(aResponse) {
      do_check_eq(aResponse, "Success!");
      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    }
  }
  httpRequest(kSuccessUrl, options);
});

add_test(function test_errorCallback() {
  do_test_pending();
  let options = {
    onSuccess: function(aResponse) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    },
    onError: function(e, aResponse) {
      do_check_eq(e, "404 - Not Found");
      do_test_finished();
      run_next_test();
    }
  }
  httpRequest(kBaseUrl + "/failure", options);
});

add_test(function test_PostData() {
  do_test_pending();
  let options = {
    onLoad: function(aResponse) {
      do_check_eq(aResponse, "Success!");
      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    },
    postData: kPostDataSent
  }
  httpRequest(kPostUrl, options);
});

add_test(function test_PutData() {
  do_test_pending();
  let options = {
    method: "PUT",
    onLoad: function(aResponse) {
      do_check_eq(aResponse, "Success!");
      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    },
    postData: kPutDataSent
  }
  httpRequest(kPutUrl, options);
});

add_test(function test_GetData() {
  do_test_pending();
  let options = {
    onLoad: function(aResponse) {
      do_check_eq(aResponse, "Success!");
      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    },
    postData: null
  }
  httpRequest(kGetUrl, options);
});

add_test(function test_OptionalParameters() {
  let options = {
    onLoad: null,
    onError: null,
    logger: null
  };
  // Just make sure that nothing throws when doing this (i.e. httpRequest
  // doesn't try to access null options).
  httpRequest(kGetUrl, options);
  run_next_test();
});

/**
 * Makes sure that httpRequest API allows setting a custom Content-Type header
 * for POST requests when data is a string.
 */
add_test(function test_CustomContentTypeOnPost() {
  do_test_pending();

  // Preparing the request parameters.
  let options = {
    onLoad: function(aResponse) {
      do_check_eq(aResponse, "Success!");
      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    },
    postData: kJsonPostData,
    // Setting a custom Content-Type header.
    headers: [['Content-Type', "application/json"]]
  }

  // Firing the request.
  httpRequest(kJsonPostUrl, options);
});

/**
 * Ensures that the httpRequest API provides a way to override the response
 * MIME type.
 */
add_test(function test_OverrideMimeType() {
  do_test_pending();

  // Preparing the request parameters.
  const kMimeType = 'text/xml; charset=UTF-8';
  let options = {
    onLoad: function(aResponse, xhr) {
      do_check_eq(aResponse, "Success!");

      // Set the expected MIME-type.
      let reportedMimeType = xhr.getResponseHeader("Content-Type");
      do_check_neq(reportedMimeType, kMimeType);

      // responseXML should not be not null if overriding mime type succeeded.
      do_check_true(xhr.responseXML != null);

      do_test_finished();
      run_next_test();
    },
    onError: function(e) {
      do_check_true(false);
      do_test_finished();
      run_next_test();
    }
  };

  // Firing the request.
  let xhr = httpRequest(kGetUrl, options);

  // Override the response MIME type.
  xhr.overrideMimeType(kMimeType);
});

function run_test() {
  // Set up a mock HTTP server to serve a success page.
  server = new HttpServer();
  server.registerPathHandler(kSuccessPath, successResult);
  server.registerPathHandler(kPostPath,
                             getDataChecker("POST", kPostDataReceived,
                                            kPostMimeTypeReceived));
  server.registerPathHandler(kPutPath,
                             getDataChecker("PUT", kPutDataReceived));
  server.registerPathHandler(kGetPath, getDataChecker("GET", ""));
  server.registerPathHandler(kJsonPostPath,
                             getDataChecker("POST", kJsonPostData,
                                            kJsonPostMimeType));

  server.start(kDefaultServerPort);

  run_next_test();

  // Teardown.
  do_register_cleanup(function() {
    server.stop(function() { });
  });
}