/*jshint globalstrict:false, strict:false, maxlen: 500 */
/*global assertEqual, AQL_EXECUTE */

////////////////////////////////////////////////////////////////////////////////
/// @brief tests for index usage
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2010-2012 triagens GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

var jsunity = require("jsunity");
var db = require("org/arangodb").db;


////////////////////////////////////////////////////////////////////////////////
/// @brief test suite
////////////////////////////////////////////////////////////////////////////////

function optimizerEdgeIndexTestSuite () {
  var c;
  var e;

  return {
    setUp : function () {
      db._drop("UnitTestsCollection");
      db._drop("UnitTestsEdgeCollection");
      c = db._create("UnitTestsCollection");
      e = db._createEdgeCollection("UnitTestsEdgeCollection");

      for (var i = 0; i < 2000; i += 100) {
        var j;

        for (j = 0; j < i; ++j) {
          e.save("UnitTestsCollection/from" + i, "UnitTestsCollection/nono", { value: i + "-" + j });
        }
        for (j = 0; j < i; ++j) {
          e.save("UnitTestsCollection/nono", "UnitTestsCollection/to" + i, { value: i + "-" + j });
        }
      }
    },

    tearDown : function () {
      db._drop("UnitTestsCollection");
    },

////////////////////////////////////////////////////////////////////////////////
/// @brief test continuous index scan
////////////////////////////////////////////////////////////////////////////////

    testFindContinuous : function () {
      for (var i = 0; i < 20; ++i) {
        var query = "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/nono' && i._to == 'UnitTestsCollection/to" + i + "' LIMIT 1 RETURN i._key";
        var results = AQL_EXECUTE(query);
        assertEqual(0, results.json.length, query);
      }
    },

////////////////////////////////////////////////////////////////////////////////
/// @brief test index usage
////////////////////////////////////////////////////////////////////////////////

    testFindNone : function () {
      var queries = [
        "FOR i IN " + e.name() + " FILTER i._from == '' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from0' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from2' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == '/' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._from == '--foobar--' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == '' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/from0' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/from1' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/from2' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == '/' RETURN i._key",
        "FOR i IN " + e.name() + " FILTER i._to == '--foobar--' RETURN i._key"
      ];

      queries.forEach(function(query) {
        var results = AQL_EXECUTE(query);
        assertEqual([ ], results.json, query);
        assertEqual(0, results.stats.scannedFull);
      });
    },

////////////////////////////////////////////////////////////////////////////////
/// @brief test index usage
////////////////////////////////////////////////////////////////////////////////

    testFindFrom : function () {
      var queries = [
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from100' RETURN i._key", 100 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from200' RETURN i._key", 200 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1000' RETURN i._key", 1000 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1100' RETURN i._key", 1100 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1900' RETURN i._key", 1900 ]
      ];

      queries.forEach(function(query) {
        var results = AQL_EXECUTE(query[0]);
        assertEqual(query[1], results.json.length, query[0]);
        assertEqual(0, results.stats.scannedFull);
        assertEqual(query[1], results.stats.scannedIndex);
      });
    },

////////////////////////////////////////////////////////////////////////////////
/// @brief test index usage
////////////////////////////////////////////////////////////////////////////////

    testFindTo : function () {
      var queries = [
        [ "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/to100' RETURN i._key", 100 ],
        [ "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/to200' RETURN i._key", 200 ],
        [ "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/to1000' RETURN i._key", 1000 ],
        [ "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/to1100' RETURN i._key", 1100 ],
        [ "FOR i IN " + e.name() + " FILTER i._to == 'UnitTestsCollection/to1900' RETURN i._key", 1900 ]
      ];

      queries.forEach(function(query) {
        var results = AQL_EXECUTE(query[0]);
        assertEqual(query[1], results.json.length, query[0]);
        assertEqual(0, results.stats.scannedFull);
        assertEqual(query[1], results.stats.scannedIndex);
      });
    },

////////////////////////////////////////////////////////////////////////////////
/// @brief test index usage
////////////////////////////////////////////////////////////////////////////////

    testFindFromTo : function () {
      var queries = [
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from100' && i._to == 'UnitTestsCollection/nono' RETURN i._key", 100 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from200' && i._to == 'UnitTestsCollection/nono' RETURN i._key", 200 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1000' && i._to == 'UnitTestsCollection/nono' RETURN i._key", 1000 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1100' && i._to == 'UnitTestsCollection/nono' RETURN i._key", 1100 ],
        [ "FOR i IN " + e.name() + " FILTER i._from == 'UnitTestsCollection/from1900' && i._to == 'UnitTestsCollection/nono' RETURN i._key", 1900 ]
      ];

      queries.forEach(function(query) {
        var results = AQL_EXECUTE(query[0]);
        assertEqual(query[1], results.json.length, query[0]);
        assertEqual(0, results.stats.scannedFull);
        assertEqual(query[1], results.stats.scannedIndex);
      });
    }

  };
}

jsunity.run(optimizerEdgeIndexTestSuite);

return jsunity.done();

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