/*
 * position_core.js
 */
(function($) {

test('my, at, of', function() {
	$('#elx').position({
		my: 'left top',
		at: 'left top',
		of: '#parentx',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 40, left: 40 }, 'left top, left top');

	$('#elx').position({
		my: 'left top',
		at: 'left bottom',
		of: '#parentx',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 60, left: 40 }, 'left top, left bottom');

	$('#elx').position({
		my: 'left',
		at: 'bottom',
		of: '#parentx',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 55, left: 50 }, 'left, bottom');

	$('#elx').position({
		my: 'left foo',
		at: 'bar baz',
		of: '#parentx',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 45, left: 50 }, 'left foo, bar baz');
});

test('multiple elements', function() {
	var elements = $('#el1, #el2');
	var result = elements.position({
		my: 'left top',
		at: 'left bottom',
		of: '#parent',
		collision: 'none'
	});

	same(result, elements);
	var expected = {top: 10, left: 4};
	elements.each(function() {
		same($(this).offset(), expected);
	});
});

test('positions', function() {
	var definitions = [];
	var offsets = {
		left: 0,
		center: 3,
		right: 6,
		top: 0,
		center: 3,
		bottom: 6
	};
	var start = { left: 4, top: 4 };
	$.each([0, 1], function(my) {
		$.each(["top", "center", "bottom"], function(vindex, vertical) {
			$.each(["left", "center", "right"], function(hindex, horizontal) {
				definitions.push({
					my: my ? horizontal + " " + vertical : 'left top',
					at: !my ? horizontal + " " + vertical : 'left top',
					result: {
						top: my ? start.top - offsets[vertical] : start.top + offsets[vertical],
						left: my ? start.left - offsets[horizontal] : start.left + offsets[horizontal]
					}
				});
			});
		});
	});
	var el = $("#el1");
	$.each(definitions, function(index, definition) {
		el.position({
			my: definition.my,
			at: definition.at,
			of: '#parent',
			collision: 'none'
		});
		same(el.offset(), definition.result, "Position via " + jsDump.parse({my:definition.my, at:definition.at}));
	});
});

test('of', function() {
	$('#elx').position({
		my: 'left top',
		at: 'left top',
		of: '#parentx',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 40, left: 40 }, 'selector');
	
	$('#elx').position({
		my: 'left top',
		at: 'left bottom',
		of: $('#parentx'),
		collision: 'none'
	});
	same($('#elx').offset(), { top: 60, left: 40 }, 'jQuery object');
	
	$('#elx').position({
		my: 'left top',
		at: 'left top',
		of: $('#parentx')[0],
		collision: 'none'
	});
	same($('#elx').offset(), { top: 40, left: 40 }, 'DOM element');
	
	$('#elx').position({
		my: 'right bottom',
		at: 'right bottom',
		of: document,
		collision: 'none'
	});
	same($('#elx').offset(), {
		top: $(document).height() - 10,
		left: $(document).width() - 10
	}, 'document');
	
	$('#elx').position({
		my: 'right bottom',
		at: 'right bottom',
		of: window,
		collision: 'none'
	});
	same($('#elx').offset(), {
		top: $(window).height() - 10,
		left: $(window).width() - 10
	}, 'window');
	
	$(window).scrollTop(500).scrollLeft(200);
	$('#elx').position({
		my: 'right bottom',
		at: 'right bottom',
		of: window,
		collision: 'none'
	});
	same($('#elx').offset(), {
		top: $(window).height() + 500 - 10,
		left: $(window).width() + 200 - 10
	}, 'window, scrolled');
	$(window).scrollTop(0).scrollLeft(0);
	
	var event = $.extend($.Event('someEvent'), { pageX: 200, pageY: 300 });
	$('#elx').position({
		my: 'left top',
		at: 'left top',
		of: event,
		collision: 'none'
	});
	same($('#elx').offset(), {
		top: 300,
		left: 200
	}, 'event - left top, left top');
	
	event = $.extend($.Event('someEvent'), { pageX: 400, pageY: 600 });
	$('#elx').position({
		my: 'left top',
		at: 'right bottom',
		of: event,
		collision: 'none'
	});
	same($('#elx').offset(), {
		top: 600,
		left: 400
	}, 'event - left top, right bottom');
});

test('offset', function() {
	$('#elx').position({
		my: 'left top',
		at: 'left bottom',
		of: '#parentx',
		offset: '10',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 70, left: 50 }, 'single value');
	
	$('#elx').position({
		my: 'left top',
		at: 'left bottom',
		of: '#parentx',
		offset: '5 -3',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 57, left: 45 }, 'two values');
	
	$('#elx').position({
		my: 'left top',
		at: 'left bottom',
		of: '#parentx',
		offset: '5px -3px',
		collision: 'none'
	});
	same($('#elx').offset(), { top: 57, left: 45 }, 'with units');
});

test('using', function() {
	expect(6);
	
	var count = 0,
		elems = $('#el1, #el2'),
		expectedPosition = { top: 40, left: 40 },
		originalPosition = elems.position({
			my: 'right bottom',
			at: 'rigt bottom',
			of: '#parentx',
			collision: 'none'
		}).offset();
	
	elems.position({
		my: 'left top',
		at: 'left top',
		of: '#parentx',
		using: function(position) {
			same(this, elems[count], 'correct context for call #' + count);
			same(position, expectedPosition, 'correct position for call #' + count);
			count++;
		}
	});
	
	elems.each(function() {
		same($(this).offset(), originalPosition, 'elements not moved');
	});
});

function collisionTest(config, result, msg) {
	var elem = $("#elx").position($.extend({
		my: "left top",
		at: "right bottom",
		of: window
	}, config));
	same(elem.offset(), result, msg);
}

function collisionTest2(config, result, msg) {
	collisionTest($.extend({
		my: "right bottom",
		at: "left top"
	}, config), result, msg);
}

test("collision: fit, no offset", function() {
	collisionTest({
		collision: "fit"
	}, { top: $(window).height() - 10, left: $(window).width() - 10 }, "right bottom");
	
	collisionTest2({
		collision: "fit"
	}, { top: 0, left: 0 }, "left top");
});

test("collision: fit, with offset", function() {
	collisionTest({
		collision: "fit",
		offset: "2 3"
	}, { top: $(window).height() - 10, left: $(window).width() - 10 }, "right bottom");
	
	collisionTest2({
		collision: "fit",
		offset: "2 3"
	}, { top: 0, left: 0 }, "left top, positive offset");
	
	collisionTest2({
		collision: "fit",
		offset: "-2 -3"
	}, { top: 0, left: 0 }, "left top, negative offset");
});

test("collision: flip, no offset", function() {
	collisionTest({
		collision: "flip"
	}, { top: -10, left: -10 }, "left top");
	
	collisionTest2({
		collision: "flip"
	}, { top: $(window).height(), left: $(window).width() }, "right bottom");
});

test("collision: flip, with offset", function() {
	collisionTest({
		collision: "flip",
		offset: "2 3"
	}, { top: -13, left: -12 }, "left top, with offset added");
	
	collisionTest2({
		collision: "flip",
		offset: "2 3"
	}, { top: $(window).height() - 3, left: $(window).width() - 2 }, "bottom, positive offset");
	
	collisionTest2({
		collision: "flip",
		offset: "-2 -3"
	}, { top: $(window).height() + 3, left: $(window).width() + 2 }, "right bottom, negative offset");
});

test("collision: none, no offset", function() {
	collisionTest({
		collision: "none"
	}, { top: $(window).height(), left: $(window).width() }, "left top");
	
	collisionTest2({
		collision: "none"
	}, { top: -10, left: -10 }, "moved to the right bottom");
});

test("collision: none, with offset", function() {
	collisionTest({
		collision: "none",
		offset: "2 3"
	}, { top: $(window).height() + 3, left: $(window).width() + 2 }, "right bottom, with offset added");
	
	collisionTest2({
		collision: "none",
		offset: "2 3"
	}, { top: -7, left: -8 }, "left top, positive offset");
	
	collisionTest2({
		collision: "none",
		offset: "-2 -3"
	}, { top: -13, left: -12 }, "left top, negative offset");
});

})(jQuery);