var testHelper =require('../../support/test_helper');

var assert = require('../../support/assert');
var step = require('step');
var cartodbServer = require('../../../lib/cartodb/server');
var ServerOptions = require('./support/ported_server_options');
var LayergroupToken = require('../../../lib/cartodb/models/layergroup-token');

describe('raster', function() {

    var server = cartodbServer(ServerOptions);
    server.setMaxListeners(0);

    function checkCORSHeaders(res) {
      assert.equal(res.headers['access-control-allow-headers'], 'X-Requested-With, X-Prototype-Version, X-CSRF-Token');
      assert.equal(res.headers['access-control-allow-origin'], '*');
    }

    var IMAGE_EQUALS_TOLERANCE_PER_MIL = 2;

    it("can render raster for valid mapconfig", function(done) {
      var mapconfig =  {
        version: '1.2.0',
        layers: [
           { type: 'mapnik', options: {
               sql: "select ST_AsRaster(" +
                    " ST_MakeEnvelope(-100,-40, 100, 40, 4326), " +
                    " 1.0, -1.0, '8BUI', 127) as rst",
               geom_column: 'rst',
               geom_type: 'raster',
               cartocss: '#layer { raster-opacity:1.0 }',
               cartocss_version: '2.0.1'
             } }
        ]
      };
      var expected_token;
      step(
        function do_post()
        {
          var next = this;
          assert.response(server, {
              url: '/database/windshaft_test/layergroup',
              method: 'POST',
              headers: {'Content-Type': 'application/json' },
              data: JSON.stringify(mapconfig)
          }, {}, function(res, err) { next(err, res); });
        },
        function checkPost(err, res) {
          assert.ifError(err);
          assert.equal(res.statusCode, 200, res.statusCode + ': ' + res.body);
          // CORS headers should be sent with response
          // from layergroup creation via POST
          checkCORSHeaders(res);
          var parsedBody = JSON.parse(res.body);
          if ( expected_token ) {
              assert.deepEqual(parsedBody, {layergroupid: expected_token, layercount: 2});
          } else {
              expected_token = parsedBody.layergroupid;
          }
          return null;
        },
        function do_get_tile(err)
        {
          assert.ifError(err);
          var next = this;
          assert.response(server, {
              url: '/database/windshaft_test/layergroup/' + expected_token + '/0/0/0.png',
              method: 'GET',
              encoding: 'binary'
          }, {}, function(res, err) { next(err, res); });
        },
        function check_response(err, res) {
          assert.ifError(err);
          assert.equal(res.statusCode, 200, res.body);
          assert.deepEqual(res.headers['content-type'], "image/png");
          var next = this;
          assert.imageBufferIsSimilarToFile(res.body,
            './test/fixtures/raster_gray_rect.png',
            IMAGE_EQUALS_TOLERANCE_PER_MIL, function(err) {
              try {
                assert.ifError(err);
                next();
              } catch (err) { next(err); }
            });
        },
        function finish(err) {
          if (err) {
              return done(err);
          }

          var keysToDelete = {
              'user:localhost:mapviews:global': 5
          };
          keysToDelete['map_cfg|' + LayergroupToken.parse(expected_token).token] = 0;
          testHelper.deleteRedisKeys(keysToDelete, done);
        }
      );
    });

    it("raster geom type does not allow interactivity", function(done) {

        var mapconfig =  {
            version: '1.2.0',
            layers: [
                {
                    type: 'cartodb',
                    options: {
                        sql: [
                                "select 1 id,",
                                "ST_AsRaster(ST_MakeEnvelope(-100, -40, 100, 40, 4326), 1.0, -1.0, '8BUI', 127) as rst"
                        ].join(' '),
                        geom_column: 'rst',
                        geom_type: 'raster',
                        cartocss: '#layer { raster-opacity: 1.0 }',
                        cartocss_version: '2.0.1',
                        interactivity: 'id'
                    }
                }
            ]
        };

        assert.response(server,
            {
                url: '/database/windshaft_test/layergroup',
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                data: JSON.stringify(mapconfig)
            },
            {
                status: 400
            },
            function(res, err) {
                assert.ok(!err);
                checkCORSHeaders(res);
                var parsedBody = JSON.parse(res.body);
                assert.deepEqual(parsedBody.errors, [ 'Mapnik raster layers do not support interactivity' ]);
                done();
            }
        );
    });

});