////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 Realm Inc.
//
// 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.
//
////////////////////////////////////////////////////////////////////////////


'use strict';

var Realm = require('realm');
var TestCase = require('./asserts');
var testCases = require('./query-tests.json');

var typeConverters = {};

function convertValue(value, schema, type) {
    var objSchema = schema.find(function(el) { return el.name == type });
    if (!objSchema) {
        throw "Object schema '" + type + "' not found in test suite.";
    }

    return value.map(function(propValue, index) {
        if (propValue == null) {
            return null;
        }
        var property = objSchema.properties[index];
        var converter = typeConverters[property.type];
        var propType = property.objectType ? property.objectType : property.type;
        return converter ? converter(propValue, schema, propType) : propValue;
    });
}

typeConverters['date'] = function(value) { return new Date(value); };
typeConverters['data'] = function(value) { return new Uint8Array(value); };
typeConverters['object'] = convertValue;

function runQuerySuite(suite) {
    var realm = new Realm({schema: suite.schema});
    var objects = suite.objects.map(function(obj) {
        return { type: obj.type, value: convertValue(obj.value, suite.schema, obj.type) };
    });

    realm.write(function() {
        for (var i = 0; i < objects.length; i++) {
            objects[i] = realm.create(objects[i].type, objects[i].value);
        }
    });

    function getArgs(startArg) {
        var args = [test[startArg]];
        for (var i = startArg + 1; i < test.length; i++) {
            var arg = test[i];
            if (Array.isArray(arg)) {
                // aray arguments correspond to [objectAtIndex, propertyName]
                args.push(objects[arg[0]][arg[1]]);
            }
            else {
                args.push(arg);
            }
        }
        return args;
    }

    for (var index in suite.tests) {
        var test = suite.tests[index];
        var type;
        var args;
        var results;

        if (test[0] == "QueryCount") {
            type = test[2];
            args = getArgs(3);
            results = realm.objects(type);

            var length = results.filtered.apply(results, args).length;
            TestCase.assertEqual(test[1], length, "Query '" + args[0] + "' on type '" + type + "' expected " + test[1] + " results, got " + length);
        }
        else if (test[0] == "ObjectSet") {
            type = test[2];
            args = getArgs(3);
            results = realm.objects(type);
            results = results.filtered.apply(results, args);
         
            TestCase.assertEqual(test[1].length, results.length, "Query '" + args[0] + "' on type '" + type+ "' expected " + test[1].length + " results, got " + results.length);

            var objSchema = suite.schema.find(function(el) { return el.name == type });
            var primary = objSchema.primaryKey;
            if (!primary) {
                throw "Primary key required for object comparison";
            }

            TestCase.assertArraysEqual(test[1], results.map(function(el) {
                return el[primary];
            }));
        }
        else if (test[0] == "QueryThrows") {
            type = test[1];
            args = getArgs(2);
            results = realm.objects(type);

            TestCase.assertThrows(function() {
                results.filtered.apply(results, args);
            }, "Expected exception not thrown for query: " + JSON.stringify(args));
        }
        else if (test[0] != "Disabled") {
            throw "Invalid query test '" + test[0] + "'";
        }
    }
}


module.exports = {
    testDateQueries: function() { 
        runQuerySuite(testCases.dateTests);
    },
    testBoolQueries: function() { 
        runQuerySuite(testCases.boolTests);
    },
    testIntQueries: function() { 
        runQuerySuite(testCases.intTests);
    },
    testFloatQueries: function() { 
        runQuerySuite(testCases.floatTests);
    },
    testDoubleQueries: function() { 
        runQuerySuite(testCases.doubleTests);
    },
    testStringQueries: function() { 
        runQuerySuite(testCases.stringTests);
    },
    testBinaryQueries: function() { 
        runQuerySuite(testCases.binaryTests);
    },
    testObjectQueries: function() {
        runQuerySuite(testCases.objectTests);
    },
    testCompoundQueries: function() {
        runQuerySuite(testCases.compoundTests);
    },
    testKeyPathQueries: function() {
        runQuerySuite(testCases.keyPathTests);
    },
    testOptionalQueries: function() {
        runQuerySuite(testCases.optionalTests);
    }
};