'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _index = require('../index.js');

var _index2 = _interopRequireDefault(_index);

var _asserts = require('../asserts.js');

var _asserts2 = _interopRequireDefault(_asserts);

var _extent = require('../extent.js');

var _extent2 = _interopRequireDefault(_extent);

var _obj = require('../obj.js');

var _obj2 = _interopRequireDefault(_obj);

var _math = require('../math.js');

var _math2 = _interopRequireDefault(_math);

var _proj = require('../proj.js');

var _proj2 = _interopRequireDefault(_proj);

var _reproj = require('../reproj.js');

var _reproj2 = _interopRequireDefault(_reproj);

var _size = require('../size.js');

var _size2 = _interopRequireDefault(_size);

var _tileimage = require('../source/tileimage.js');

var _tileimage2 = _interopRequireDefault(_tileimage);

var _wmsservertype = require('../source/wmsservertype.js');

var _wmsservertype2 = _interopRequireDefault(_wmsservertype);

var _tilecoord = require('../tilecoord.js');

var _tilecoord2 = _interopRequireDefault(_tilecoord);

var _string = require('../string.js');

var _string2 = _interopRequireDefault(_string);

var _uri = require('../uri.js');

var _uri2 = _interopRequireDefault(_uri);

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : { default: obj };
}

/**
 * @classdesc
 * Layer source for tile data from WMS servers.
 *
 * @constructor
 * @extends {ol.source.TileImage}
 * @param {olx.source.TileWMSOptions=} opt_options Tile WMS options.
 * @api
 */
var _ol_source_TileWMS_ = function (opt_options) {

  var options = opt_options || {};

  var params = options.params || {};

  var transparent = 'TRANSPARENT' in params ? params['TRANSPARENT'] : true;

  _tileimage2.default.call(this, {
    attributions: options.attributions,
    cacheSize: options.cacheSize,
    crossOrigin: options.crossOrigin,
    logo: options.logo,
    opaque: !transparent,
    projection: options.projection,
    reprojectionErrorThreshold: options.reprojectionErrorThreshold,
    tileClass: options.tileClass,
    tileGrid: options.tileGrid,
    tileLoadFunction: options.tileLoadFunction,
    url: options.url,
    urls: options.urls,
    wrapX: options.wrapX !== undefined ? options.wrapX : true,
    transition: options.transition
  });

  /**
   * @private
   * @type {number}
   */
  this.gutter_ = options.gutter !== undefined ? options.gutter : 0;

  /**
   * @private
   * @type {!Object}
   */
  this.params_ = params;

  /**
   * @private
   * @type {boolean}
   */
  this.v13_ = true;

  /**
   * @private
   * @type {ol.source.WMSServerType|undefined}
   */
  this.serverType_ = /** @type {ol.source.WMSServerType|undefined} */options.serverType;

  /**
   * @private
   * @type {boolean}
   */
  this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;

  /**
   * @private
   * @type {ol.Extent}
   */
  this.tmpExtent_ = _extent2.default.createEmpty();

  this.updateV13_();
  this.setKey(this.getKeyForParams_());
}; // FIXME add minZoom support
// FIXME add date line wrap (tile coord transform)
// FIXME cannot be shared between maps with different projections

_index2.default.inherits(_ol_source_TileWMS_, _tileimage2.default);

/**
 * Return the GetFeatureInfo URL for the passed coordinate, resolution, and
 * projection. Return `undefined` if the GetFeatureInfo URL cannot be
 * constructed.
 * @param {ol.Coordinate} coordinate Coordinate.
 * @param {number} resolution Resolution.
 * @param {ol.ProjectionLike} projection Projection.
 * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should
 *     be provided. If `QUERY_LAYERS` is not provided then the layers specified
 *     in the `LAYERS` parameter will be used. `VERSION` should not be
 *     specified here.
 * @return {string|undefined} GetFeatureInfo URL.
 * @api
 */
_ol_source_TileWMS_.prototype.getGetFeatureInfoUrl = function (coordinate, resolution, projection, params) {
  var projectionObj = _proj2.default.get(projection);
  var sourceProjectionObj = this.getProjection();

  var tileGrid = this.getTileGrid();
  if (!tileGrid) {
    tileGrid = this.getTileGridForProjection(projectionObj);
  }

  var tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, resolution);

  if (tileGrid.getResolutions().length <= tileCoord[0]) {
    return undefined;
  }

  var tileResolution = tileGrid.getResolution(tileCoord[0]);
  var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);
  var tileSize = _size2.default.toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);

  var gutter = this.gutter_;
  if (gutter !== 0) {
    tileSize = _size2.default.buffer(tileSize, gutter, this.tmpSize);
    tileExtent = _extent2.default.buffer(tileExtent, tileResolution * gutter, tileExtent);
  }

  if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {
    tileResolution = _reproj2.default.calculateSourceResolution(sourceProjectionObj, projectionObj, coordinate, tileResolution);
    tileExtent = _proj2.default.transformExtent(tileExtent, projectionObj, sourceProjectionObj);
    coordinate = _proj2.default.transform(coordinate, projectionObj, sourceProjectionObj);
  }

  var baseParams = {
    'SERVICE': 'WMS',
    'VERSION': _index2.default.DEFAULT_WMS_VERSION,
    'REQUEST': 'GetFeatureInfo',
    'FORMAT': 'image/png',
    'TRANSPARENT': true,
    'QUERY_LAYERS': this.params_['LAYERS']
  };
  _obj2.default.assign(baseParams, this.params_, params);

  var x = Math.floor((coordinate[0] - tileExtent[0]) / tileResolution);
  var y = Math.floor((tileExtent[3] - coordinate[1]) / tileResolution);

  baseParams[this.v13_ ? 'I' : 'X'] = x;
  baseParams[this.v13_ ? 'J' : 'Y'] = y;

  return this.getRequestUrl_(tileCoord, tileSize, tileExtent, 1, sourceProjectionObj || projectionObj, baseParams);
};

/**
 * @inheritDoc
 */
_ol_source_TileWMS_.prototype.getGutterInternal = function () {
  return this.gutter_;
};

/**
 * Get the user-provided params, i.e. those passed to the constructor through
 * the "params" option, and possibly updated using the updateParams method.
 * @return {Object} Params.
 * @api
 */
_ol_source_TileWMS_.prototype.getParams = function () {
  return this.params_;
};

/**
 * @param {ol.TileCoord} tileCoord Tile coordinate.
 * @param {ol.Size} tileSize Tile size.
 * @param {ol.Extent} tileExtent Tile extent.
 * @param {number} pixelRatio Pixel ratio.
 * @param {ol.proj.Projection} projection Projection.
 * @param {Object} params Params.
 * @return {string|undefined} Request URL.
 * @private
 */
_ol_source_TileWMS_.prototype.getRequestUrl_ = function (tileCoord, tileSize, tileExtent, pixelRatio, projection, params) {

  var urls = this.urls;
  if (!urls) {
    return undefined;
  }

  params['WIDTH'] = tileSize[0];
  params['HEIGHT'] = tileSize[1];

  params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();

  if (!('STYLES' in this.params_)) {
    params['STYLES'] = '';
  }

  if (pixelRatio != 1) {
    switch (this.serverType_) {
      case _wmsservertype2.default.GEOSERVER:
        var dpi = 90 * pixelRatio + 0.5 | 0;
        if ('FORMAT_OPTIONS' in params) {
          params['FORMAT_OPTIONS'] += ';dpi:' + dpi;
        } else {
          params['FORMAT_OPTIONS'] = 'dpi:' + dpi;
        }
        break;
      case _wmsservertype2.default.MAPSERVER:
        params['MAP_RESOLUTION'] = 90 * pixelRatio;
        break;
      case _wmsservertype2.default.CARMENTA_SERVER:
      case _wmsservertype2.default.QGIS:
        params['DPI'] = 90 * pixelRatio;
        break;
      default:
        _asserts2.default.assert(false, 52); // Unknown `serverType` configured
        break;
    }
  }

  var axisOrientation = projection.getAxisOrientation();
  var bbox = tileExtent;
  if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {
    var tmp;
    tmp = tileExtent[0];
    bbox[0] = tileExtent[1];
    bbox[1] = tmp;
    tmp = tileExtent[2];
    bbox[2] = tileExtent[3];
    bbox[3] = tmp;
  }
  params['BBOX'] = bbox.join(',');

  var url;
  if (urls.length == 1) {
    url = urls[0];
  } else {
    var index = _math2.default.modulo(_tilecoord2.default.hash(tileCoord), urls.length);
    url = urls[index];
  }
  return _uri2.default.appendParams(url, params);
};

/**
 * @inheritDoc
 */
_ol_source_TileWMS_.prototype.getTilePixelRatio = function (pixelRatio) {
  return !this.hidpi_ || this.serverType_ === undefined ? 1 :
  /** @type {number} */pixelRatio;
};

/**
 * @private
 * @return {string} The key for the current params.
 */
_ol_source_TileWMS_.prototype.getKeyForParams_ = function () {
  var i = 0;
  var res = [];
  for (var key in this.params_) {
    res[i++] = key + '-' + this.params_[key];
  }
  return res.join('/');
};

/**
 * @inheritDoc
 */
_ol_source_TileWMS_.prototype.fixedTileUrlFunction = function (tileCoord, pixelRatio, projection) {

  var tileGrid = this.getTileGrid();
  if (!tileGrid) {
    tileGrid = this.getTileGridForProjection(projection);
  }

  if (tileGrid.getResolutions().length <= tileCoord[0]) {
    return undefined;
  }

  if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {
    pixelRatio = 1;
  }

  var tileResolution = tileGrid.getResolution(tileCoord[0]);
  var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);
  var tileSize = _size2.default.toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);

  var gutter = this.gutter_;
  if (gutter !== 0) {
    tileSize = _size2.default.buffer(tileSize, gutter, this.tmpSize);
    tileExtent = _extent2.default.buffer(tileExtent, tileResolution * gutter, tileExtent);
  }

  if (pixelRatio != 1) {
    tileSize = _size2.default.scale(tileSize, pixelRatio, this.tmpSize);
  }

  var baseParams = {
    'SERVICE': 'WMS',
    'VERSION': _index2.default.DEFAULT_WMS_VERSION,
    'REQUEST': 'GetMap',
    'FORMAT': 'image/png',
    'TRANSPARENT': true
  };
  _obj2.default.assign(baseParams, this.params_);

  return this.getRequestUrl_(tileCoord, tileSize, tileExtent, pixelRatio, projection, baseParams);
};

/**
 * Update the user-provided params.
 * @param {Object} params Params.
 * @api
 */
_ol_source_TileWMS_.prototype.updateParams = function (params) {
  _obj2.default.assign(this.params_, params);
  this.updateV13_();
  this.setKey(this.getKeyForParams_());
};

/**
 * @private
 */
_ol_source_TileWMS_.prototype.updateV13_ = function () {
  var version = this.params_['VERSION'] || _index2.default.DEFAULT_WMS_VERSION;
  this.v13_ = _string2.default.compareVersions(version, '1.3') >= 0;
};
exports.default = _ol_source_TileWMS_;
module.exports = exports['default'];