"use strict";
var assert = require("assert"),
	BSON = require("bson"),
	MatchDetails = require("../../../../lib/pipeline/matcher/MatchDetails"),
	GTMatchExpression = require("../../../../lib/pipeline/matcher/GTMatchExpression");


module.exports = {
	"GTMatchExpression": {
		"should handle invalid End of Object Operand": function (){
			var e = new GTMatchExpression();
			var s = e.init("",{});

			assert.strictEqual(s.code, "BAD_VALUE");
		},
		"should match scalars":function() {
			var e = new GTMatchExpression();
			var s = e.init("a",5);

			assert.strictEqual(s.code, "OK");
			assert.ok( e.matchesJSON({"a":5.5}) );
			assert.ok( ! e.matchesJSON({"a":4}) );
		},
		"should match array value": function() {
			var e = new GTMatchExpression();
			var s = e.init("a",5);

			assert.strictEqual(s.code, "OK");
			assert.ok( e.matchesJSON({"a":[3,5.5]}) );
			assert.ok( ! e.matchesJSON({"a":[2,4]}) );
		},
		"should match whole array": function() {
			var e = new GTMatchExpression();
			var s = e.init("a",[5]);

			assert.strictEqual(s.code, "OK");
			assert.ok( ! e.matchesJSON({"a":[4]}) );
			assert.ok( ! e.matchesJSON({"a":[5]}) );
			assert.ok( e.matchesJSON({"a":[6]}) );
			// Nested array.
			// XXX: The following assertion documents current behavior.
			assert.ok( e.matchesJSON({"a":[[4]]}) );
			assert.ok( e.matchesJSON({"a":[[5]]}) );
			assert.ok( e.matchesJSON({"a":[[6]]}) );
		},
		"should match null" : function() {
			var e = new GTMatchExpression();
			var s = e.init("a",null);

			assert.strictEqual(s.code, "OK");
			assert.ok( !e.matchesJSON({}) );
			assert.ok( !e.matchesJSON({"a":null}) );
			assert.ok( ! e.matchesJSON({"a":4}) );
			// A non-existent field is treated same way as an empty bson object
			assert.ok( ! e.matchesJSON({"b":4}) );
		},
		"should match dot notation null" : function() {
			var e = new GTMatchExpression();
			var s = e.init("a.b",null);

			assert.strictEqual(s.code, "OK");
			assert.ok( !e.matchesJSON({}) );
			assert.ok( !e.matchesJSON({"a":null}) );
			assert.ok( ! e.matchesJSON({"a":4}) );
			assert.ok( ! e.matchesJSON({"a":{}}) );
			assert.ok( ! e.matchesJSON({"a":[{b:null}]}) );
			assert.ok( ! e.matchesJSON({"a":[{a:4},{b:4}]}) );
			assert.ok( ! e.matchesJSON({"a":[4]}) );
			assert.ok( ! e.matchesJSON({"a":[{b:4}]}) );
		},
		"should match MinKey": function (){
			var operand = {a:new BSON.MinKey()},
				e = new GTMatchExpression();
			var s = e.init("a",operand.a);
			assert.strictEqual(s.code, "OK");
			assert.ok( ! e.matchesJSON({"a":new BSON.MinKey()}, null));
			assert.ok(e.matchesJSON({"a":new BSON.MaxKey()}, null));
			assert.ok(e.matchesJSON({"a":4}), null);
		},
		"should match MaxKey": function (){
			var operand = {a:new BSON.MaxKey()},
				e = new GTMatchExpression();
			var s = e.init("a",operand.a);
			assert.strictEqual(s.code, "OK");
			assert.ok(!e.matchesJSON({"a":new BSON.MaxKey()}, null));
			assert.ok(!e.matchesJSON({"a":new BSON.MinKey()}, null));
			assert.ok(!e.matchesJSON({"a":4}), null);
		},
		"should handle elemMatchKey":function() {
			var e = new GTMatchExpression();
			var s = e.init("a",5);
			var m = new MatchDetails();
			m.requestElemMatchKey();
			assert.strictEqual( s.code, "OK" );

			assert.ok( ! e.matchesJSON({"a":4}, m) );
			assert.ok( ! m.hasElemMatchKey() );

			assert.ok( e.matchesJSON({"a":6}, m) );
			assert.ok( ! m.hasElemMatchKey() );

			assert.ok( e.matchesJSON({"a":[2,6,5]}, m));
			assert.ok( m.hasElemMatchKey());
			assert.strictEqual("1", m.elemMatchKey());
		}
	}
};

if (!module.parent)(new(require("mocha"))()).ui("exports").reporter("spec").addFile(__filename).run(process.exit);