(function() {
  'use strict';

  /*
   * Copyright 2017 Sam Thorogood. All rights reserved.
   *
   * 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.
   */

  /**
   * @fileoverview Polyfill for TextEncoder and TextDecoder.
   *
   * You probably want `text.min.js`, and not this file directly.
   */

  (function(scope) {
    // fail early
    if (scope['TextEncoder'] && scope['TextDecoder']) {
      return false;
    }

    /**
     * @constructor
     * @param {string=} utfLabel
     */
    function FastTextEncoder(utfLabel = 'utf-8') {
      if (utfLabel !== 'utf-8') {
        throw new RangeError(`Failed to construct 'TextEncoder': The encoding label provided ('${utfLabel}') is invalid.`);
      }
    }

    Object.defineProperty(FastTextEncoder.prototype, 'encoding', { value: 'utf-8' });

    /**
     * @param {string} string
     * @param {{stream: boolean}=} options
     * @return {!Uint8Array}
     */
    FastTextEncoder.prototype.encode = function(string, options = { stream: false }) {
      if (options.stream) {
        throw new Error(`Failed to encode: the 'stream' option is unsupported.`);
      }

      let pos = 0;
      const len = string.length;

      let at = 0; // output position
      let tlen = Math.max(32, len + (len >> 1) + 7); // 1.5x size
      let target = new Uint8Array((tlen >> 3) << 3); // ... but at 8 byte offset

      while (pos < len) {
        let value = string.charCodeAt(pos++);
        if (value >= 0xd800 && value <= 0xdbff) {
          // high surrogate
          if (pos < len) {
            const extra = string.charCodeAt(pos);
            if ((extra & 0xfc00) === 0xdc00) {
              ++pos;
              value = ((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000;
            }
          }
          if (value >= 0xd800 && value <= 0xdbff) {
            continue; // drop lone surrogate
          }
        }

        // expand the buffer if we couldn't write 4 bytes
        if (at + 4 > target.length) {
          tlen += 8; // minimum extra
          tlen *= 1.0 + (pos / string.length) * 2; // take 2x the remaining
          tlen = (tlen >> 3) << 3; // 8 byte offset

          const update = new Uint8Array(tlen);
          update.set(target);
          target = update;
        }

        if ((value & 0xffffff80) === 0) {
          // 1-byte
          target[at++] = value; // ASCII
          continue;
        } else if ((value & 0xfffff800) === 0) {
          // 2-byte
          target[at++] = ((value >> 6) & 0x1f) | 0xc0;
        } else if ((value & 0xffff0000) === 0) {
          // 3-byte
          target[at++] = ((value >> 12) & 0x0f) | 0xe0;
          target[at++] = ((value >> 6) & 0x3f) | 0x80;
        } else if ((value & 0xffe00000) === 0) {
          // 4-byte
          target[at++] = ((value >> 18) & 0x07) | 0xf0;
          target[at++] = ((value >> 12) & 0x3f) | 0x80;
          target[at++] = ((value >> 6) & 0x3f) | 0x80;
        } else {
          // FIXME: do we care
          continue;
        }

        target[at++] = (value & 0x3f) | 0x80;
      }

      return target.slice(0, at);
    };

    /**
     * @constructor
     * @param {string=} utfLabel
     * @param {{fatal: boolean}=} options
     */
    function FastTextDecoder(utfLabel = 'utf-8', options = { fatal: false }) {
      if (utfLabel !== 'utf-8') {
        throw new RangeError(`Failed to construct 'TextDecoder': The encoding label provided ('${utfLabel}') is invalid.`);
      }
      if (options.fatal) {
        throw new Error(`Failed to construct 'TextDecoder': the 'fatal' option is unsupported.`);
      }
    }

    Object.defineProperty(FastTextDecoder.prototype, 'encoding', { value: 'utf-8' });

    Object.defineProperty(FastTextDecoder.prototype, 'fatal', { value: false });

    Object.defineProperty(FastTextDecoder.prototype, 'ignoreBOM', { value: false });

    /**
     * @param {(!ArrayBuffer|!ArrayBufferView)} buffer
     * @param {{stream: boolean}=} options
     */
    FastTextDecoder.prototype.decode = function(buffer, options = { stream: false }) {
      if (options['stream']) {
        throw new Error(`Failed to decode: the 'stream' option is unsupported.`);
      }

      const bytes = new Uint8Array(buffer);
      let pos = 0;
      const len = bytes.length;
      const out = [];

      while (pos < len) {
        const byte1 = bytes[pos++];
        if (byte1 === 0) {
          break; // NULL
        }

        if ((byte1 & 0x80) === 0) {
          // 1-byte
          out.push(byte1);
        } else if ((byte1 & 0xe0) === 0xc0) {
          // 2-byte
          const byte2 = bytes[pos++] & 0x3f;
          out.push(((byte1 & 0x1f) << 6) | byte2);
        } else if ((byte1 & 0xf0) === 0xe0) {
          const byte2 = bytes[pos++] & 0x3f;
          const byte3 = bytes[pos++] & 0x3f;
          out.push(((byte1 & 0x1f) << 12) | (byte2 << 6) | byte3);
        } else if ((byte1 & 0xf8) === 0xf0) {
          const byte2 = bytes[pos++] & 0x3f;
          const byte3 = bytes[pos++] & 0x3f;
          const byte4 = bytes[pos++] & 0x3f;

          // this can be > 0xffff, so possibly generate surrogates
          let codepoint = ((byte1 & 0x07) << 0x12) | (byte2 << 0x0c) | (byte3 << 0x06) | byte4;
          if (codepoint > 0xffff) {
            // codepoint &= ~0x10000;
            codepoint -= 0x10000;
            out.push(((codepoint >>> 10) & 0x3ff) | 0xd800);
            codepoint = 0xdc00 | (codepoint & 0x3ff);
          }
          out.push(codepoint);
        }
      }

      return String.fromCharCode.apply(null, out);
    };

    scope['TextEncoder'] = FastTextEncoder;
    scope['TextDecoder'] = FastTextDecoder;
  })(typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : self);

  (function() {
    const __exports = {};
    let wasm;

    const heap = new Array(32);

    heap.fill(undefined);

    heap.push(undefined, null, true, false);

    let stack_pointer = 32;

    function addBorrowedObject(obj) {
      if (stack_pointer == 1) throw new Error('out of js stack');
      heap[--stack_pointer] = obj;
      return stack_pointer;
    }

    let cachegetUint8Memory = null;
    function getUint8Memory() {
      if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== wasm.memory.buffer) {
        cachegetUint8Memory = new Uint8Array(wasm.memory.buffer);
      }
      return cachegetUint8Memory;
    }

    function getArrayU8FromWasm(ptr, len) {
      return getUint8Memory().subarray(ptr / 1, ptr / 1 + len);
    }

    let cachedGlobalArgumentPtr = null;
    function globalArgumentPtr() {
      if (cachedGlobalArgumentPtr === null) {
        cachedGlobalArgumentPtr = wasm.__wbindgen_global_argument_ptr();
      }
      return cachedGlobalArgumentPtr;
    }

    let cachegetUint32Memory = null;
    function getUint32Memory() {
      if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== wasm.memory.buffer) {
        cachegetUint32Memory = new Uint32Array(wasm.memory.buffer);
      }
      return cachegetUint32Memory;
    }
    /**
     * @param {any} raw_data
     * @returns {Uint8Array}
     */
    __exports.import_to_xlsx = function(raw_data) {
      const retptr = globalArgumentPtr();
      try {
        wasm.import_to_xlsx(retptr, addBorrowedObject(raw_data));
        const mem = getUint32Memory();
        const rustptr = mem[retptr / 4];
        const rustlen = mem[retptr / 4 + 1];

        const realRet = getArrayU8FromWasm(rustptr, rustlen).slice();
        wasm.__wbindgen_free(rustptr, rustlen * 1);
        return realRet;
      } finally {
        heap[stack_pointer++] = undefined;
      }
    };

    let cachedTextEncoder = new TextEncoder('utf-8');

    let WASM_VECTOR_LEN = 0;

    let passStringToWasm;
    if (typeof cachedTextEncoder.encodeInto === 'function') {
      passStringToWasm = function(arg) {
        let size = arg.length;
        let ptr = wasm.__wbindgen_malloc(size);
        let writeOffset = 0;
        // eslint-disable-next-line no-constant-condition
        while (true) {
          const view = getUint8Memory().subarray(ptr + writeOffset, ptr + size);
          const { read, written } = cachedTextEncoder.encodeInto(arg, view);
          arg = arg.substring(read);
          writeOffset += written;
          if (arg.length === 0) {
            break;
          }
          ptr = wasm.__wbindgen_realloc(ptr, size, size * 2);
          size *= 2;
        }
        WASM_VECTOR_LEN = writeOffset;
        return ptr;
      };
    } else {
      passStringToWasm = function(arg) {
        const buf = cachedTextEncoder.encode(arg);
        const ptr = wasm.__wbindgen_malloc(buf.length);
        getUint8Memory().set(buf, ptr);
        WASM_VECTOR_LEN = buf.length;
        return ptr;
      };
    }

    function getObject(idx) {
      return heap[idx];
    }

    __exports.__wbindgen_json_serialize = function(idx, ptrptr) {
      const ptr = passStringToWasm(JSON.stringify(getObject(idx)));
      getUint32Memory()[ptrptr / 4] = ptr;
      return WASM_VECTOR_LEN;
    };

    let heap_next = heap.length;

    function dropObject(idx) {
      if (idx < 36) return;
      heap[idx] = heap_next;
      heap_next = idx;
    }

    __exports.__wbindgen_object_drop_ref = function(i) {
      dropObject(i);
    };

    // eslint-disable-next-line no-unused-vars
    function init(module_or_path, maybe_memory) {
      let result;
      const imports = { './xlsx_import': __exports };
      if (module_or_path instanceof URL || typeof module_or_path === 'string' || module_or_path instanceof Request) {
        const response = fetch(module_or_path);
        if (typeof WebAssembly.instantiateStreaming === 'function') {
          result = WebAssembly.instantiateStreaming(response, imports).catch(e => {
            console.warn(
              '`WebAssembly.instantiateStreaming` failed. Assuming this is because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n',
              e
            );
            return response.then(r => r.arrayBuffer()).then(bytes => WebAssembly.instantiate(bytes, imports));
          });
        } else {
          result = response.then(r => r.arrayBuffer()).then(bytes => WebAssembly.instantiate(bytes, imports));
        }
      } else {
        result = WebAssembly.instantiate(module_or_path, imports).then(instance => {
          return { instance, module: module_or_path };
        });
      }
      return result.then(({ instance, module }) => {
        wasm = instance.exports;
        init.__wbindgen_wasm_module = module;

        return wasm;
      });
    }

    self.wasm_bindgen = Object.assign(init, __exports);
  })();

  onmessage = function(e) {
    if (e.data.type === 'convert') {
      doConvert(e.data);
    }
  };

  let import_to_xlsx = null;
  function doConvert(config) {
    if (import_to_xlsx) {
      const result = import_to_xlsx(config.data);
      const blob = new Blob([result], {
        type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;base64,',
      });

      postMessage({
        uid: config.uid || new Date().valueOf(),
        type: 'ready',
        blob,
      });
    } else {
      const path = config.wasmPath || 'https://cdn.dhtmlx.com/libs/json2excel/1.0/lib.wasm';

      // eslint-disable-next-line no-undef
      wasm_bindgen(path)
        .then(() => {
          // eslint-disable-next-line no-undef
          import_to_xlsx = wasm_bindgen.import_to_xlsx;
          doConvert(config);
        })
        .catch(e => console.log(e));
    }
  }
})();