/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* eslint-disable no-var */

import { CFFCompiler, CFFParser } from "./cff_parser.js";
import { SEAC_ANALYSIS_ENABLED, type1FontGlyphMapping } from "./fonts_utils.js";
import { warn } from "../shared/util.js";

var CFFFont = (function CFFFontClosure() {
  // eslint-disable-next-line no-shadow
  function CFFFont(file, properties) {
    this.properties = properties;

    var parser = new CFFParser(file, properties, SEAC_ANALYSIS_ENABLED);
    this.cff = parser.parse();
    this.cff.duplicateFirstGlyph();
    var compiler = new CFFCompiler(this.cff);
    this.seacs = this.cff.seacs;
    try {
      this.data = compiler.compile();
    } catch (e) {
      warn("Failed to compile font " + properties.loadedName);
      // There may have just been an issue with the compiler, set the data
      // anyway and hope the font loaded.
      this.data = file;
    }
    this._createBuiltInEncoding();
  }

  CFFFont.prototype = {
    get numGlyphs() {
      return this.cff.charStrings.count;
    },
    getCharset: function CFFFont_getCharset() {
      return this.cff.charset.charset;
    },
    getGlyphMapping: function CFFFont_getGlyphMapping() {
      var cff = this.cff;
      var properties = this.properties;
      var charsets = cff.charset.charset;
      var charCodeToGlyphId;
      var glyphId;

      if (properties.composite) {
        charCodeToGlyphId = Object.create(null);
        let charCode;
        if (cff.isCIDFont) {
          // If the font is actually a CID font then we should use the charset
          // to map CIDs to GIDs.
          for (glyphId = 0; glyphId < charsets.length; glyphId++) {
            var cid = charsets[glyphId];
            charCode = properties.cMap.charCodeOf(cid);
            charCodeToGlyphId[charCode] = glyphId;
          }
        } else {
          // If it is NOT actually a CID font then CIDs should be mapped
          // directly to GIDs.
          for (glyphId = 0; glyphId < cff.charStrings.count; glyphId++) {
            charCode = properties.cMap.charCodeOf(glyphId);
            charCodeToGlyphId[charCode] = glyphId;
          }
        }
        return charCodeToGlyphId;
      }

      var encoding = cff.encoding ? cff.encoding.encoding : null;
      charCodeToGlyphId = type1FontGlyphMapping(properties, encoding, charsets);
      return charCodeToGlyphId;
    },
    hasGlyphId: function CFFFont_hasGlyphID(id) {
      return this.cff.hasGlyphId(id);
    },

    /**
     * @private
     */
    _createBuiltInEncoding() {
      const { charset, encoding } = this.cff;
      if (!charset || !encoding) {
        return;
      }
      const charsets = charset.charset,
        encodings = encoding.encoding;
      const map = [];

      for (const charCode in encodings) {
        const glyphId = encodings[charCode];
        if (glyphId >= 0) {
          const glyphName = charsets[glyphId];
          if (glyphName) {
            map[charCode] = glyphName;
          }
        }
      }
      if (map.length > 0) {
        this.properties.builtInEncoding = map;
      }
    },
  };

  return CFFFont;
})();

export { CFFFont };