/**
 * @tags: [
 *     does_not_support_stepdowns,
 * ]
 */

t = db.borders;
t.drop();

epsilon = 0.0001;

// For these tests, *required* that step ends exactly on max
min = -1;
max = 1;
step = 1;
numItems = 0;

for (var x = min; x <= max; x += step) {
    for (var y = min; y <= max; y += step) {
        t.insert({loc: {x: x, y: y}});
        numItems++;
    }
}

overallMin = -1;
overallMax = 1;

// Create a point index slightly smaller than the points we have
var res =
    t.createIndex({loc: "2d"}, {max: overallMax - epsilon / 2, min: overallMin + epsilon / 2});
assert.commandFailed(res);

// Create a point index only slightly bigger than the points we have
res = t.createIndex({loc: "2d"}, {max: overallMax + epsilon, min: overallMin - epsilon});
assert.commandWorked(res);

// ************
// Box Tests
// ************

// If the bounds are bigger than the box itself, just clip at the borders
assert.eq(numItems, t.find({
                         loc: {
                             $within: {
                                 $box: [
                                     [overallMin - 2 * epsilon, overallMin - 2 * epsilon],
                                     [overallMax + 2 * epsilon, overallMax + 2 * epsilon]
                                 ]
                             }
                         }
                     }).count());

// Check this works also for bounds where only a single dimension is off-bounds
assert.eq(numItems - 5, t.find({
                             loc: {
                                 $within: {
                                     $box: [
                                         [overallMin - 2 * epsilon, overallMin - 0.5 * epsilon],
                                         [overallMax - epsilon, overallMax - epsilon]
                                     ]
                                 }
                             }
                         }).count());

// Make sure we can get at least close to the bounds of the index
assert.eq(numItems, t.find({
                         loc: {
                             $within: {
                                 $box: [
                                     [overallMin - epsilon / 2, overallMin - epsilon / 2],
                                     [overallMax + epsilon / 2, overallMax + epsilon / 2]
                                 ]
                             }
                         }
                     }).count());

// Make sure we can get at least close to the bounds of the index
assert.eq(numItems, t.find({
                         loc: {
                             $within: {
                                 $box: [
                                     [overallMax + epsilon / 2, overallMax + epsilon / 2],
                                     [overallMin - epsilon / 2, overallMin - epsilon / 2]
                                 ]
                             }
                         }
                     }).count());

// Check that swapping min/max has good behavior
assert.eq(numItems, t.find({
                         loc: {
                             $within: {
                                 $box: [
                                     [overallMax + epsilon / 2, overallMax + epsilon / 2],
                                     [overallMin - epsilon / 2, overallMin - epsilon / 2]
                                 ]
                             }
                         }
                     }).count());

assert.eq(numItems, t.find({
                         loc: {
                             $within: {
                                 $box: [
                                     [overallMax + epsilon / 2, overallMin - epsilon / 2],
                                     [overallMin - epsilon / 2, overallMax + epsilon / 2]
                                 ]
                             }
                         }
                     }).count());

// **************
// Circle tests
// **************

center = (overallMax + overallMin) / 2;
center = [center, center];
radius = overallMax;

offCenter = [center[0] + radius, center[1] + radius];
onBounds = [offCenter[0] + epsilon, offCenter[1] + epsilon];
offBounds = [onBounds[0] + epsilon, onBounds[1] + epsilon];
onBoundsNeg = [-onBounds[0], -onBounds[1]];

// Make sure we can get all points when radius is exactly at full bounds
assert.lt(0, t.find({loc: {$within: {$center: [center, radius + epsilon]}}}).count());

// Make sure we can get points when radius is over full bounds
assert.lt(0, t.find({loc: {$within: {$center: [center, radius + 2 * epsilon]}}}).count());

// Make sure we can get points when radius is over full bounds, off-centered
assert.lt(0, t.find({loc: {$within: {$center: [offCenter, radius + 2 * epsilon]}}}).count());

// Make sure we get correct corner point when center is in bounds
// (x bounds wrap, so could get other corner)
cornerPt = t.findOne({loc: {$within: {$center: [offCenter, step / 2]}}});
assert.eq(cornerPt.loc.y, overallMax);

// Make sure we get correct corner point when center is on bounds
// NOTE: Only valid points on MIN bounds
cornerPt = t.findOne(
    {loc: {$within: {$center: [onBoundsNeg, Math.sqrt(2 * epsilon * epsilon) + (step / 2)]}}});
assert.eq(cornerPt.loc.y, overallMin);

// ***********
// Near tests
// ***********

// Make sure we can get all nearby points to point in range
assert.eq(overallMax, t.find({loc: {$near: offCenter}}).next().loc.y);

// Make sure we can get all nearby points to point on boundary
assert.eq(overallMin, t.find({loc: {$near: onBoundsNeg}}).next().loc.y);

// Make sure we can't get all nearby points to point on max boundary
// Broken - see SERVER-13581
// assert.throws(function(){
//    t.findOne( { loc : { $near : onBoundsNeg } } );
//});

// Make sure we can get all nearby points within one step (4 points in top
// corner)
assert.eq(4, t.find({loc: {$near: offCenter, $maxDistance: step * 1.9}}).count());

// **************
// Command Tests
// **************
// Make sure we can get all nearby points to point in range
assert.eq(overallMax,
          t.aggregate({$geoNear: {near: offCenter, distanceField: "d"}}).toArray()[0].loc.y);

// Make sure we can get all nearby points to point on boundary
assert.eq(overallMin,
          t.aggregate({$geoNear: {near: onBoundsNeg, distanceField: "d"}}).toArray()[0].loc.y);

// Make sure we can't get all nearby points to point over boundary
assert.commandFailedWithCode(db.runCommand({
    aggregate: "borders",
    cursor: {},
    pipeline: [{$geoNear: {near: offBounds, distanceField: "d"}}]
}),
                             16433);
assert.eq(numItems, t.aggregate({$geoNear: {near: onBounds, distanceField: "d"}}).toArray().length);

// Make sure we can get all nearby points within one step (4 points in top
// corner)
assert.eq(4,
          t.aggregate({$geoNear: {near: offCenter, maxDistance: step * 1.5, distanceField: "d"}})
              .toArray()
              .length);