'use strict';

var inflate = require('../../../_virtual/inflate.js');
var inflate$1 = require('./zlib/inflate.js');
var common = require('./utils/common.js');
var strings = require('./utils/strings.js');
var constants = require('./zlib/constants.js');
var messages = require('./zlib/messages.js');
var zstream = require('./zlib/zstream.js');
var gzheader = require('./zlib/gzheader.js');

var hasRequiredInflate;

function requireInflate () {
	if (hasRequiredInflate) return inflate.__exports;
	hasRequiredInflate = 1;


	var zlib_inflate = inflate$1.__require();
	var utils        = common.__require();
	var strings$1      = strings.__require();
	var c            = constants.__require();
	var msg          = messages.__require();
	var ZStream      = zstream.__require();
	var GZheader     = gzheader.__require();

	var toString = Object.prototype.toString;

	/**
	 * class Inflate
	 *
	 * Generic JS-style wrapper for zlib calls. If you don't need
	 * streaming behaviour - use more simple functions: [[inflate]]
	 * and [[inflateRaw]].
	 **/

	/* internal
	 * inflate.chunks -> Array
	 *
	 * Chunks of output data, if [[Inflate#onData]] not overridden.
	 **/

	/**
	 * Inflate.result -> Uint8Array|Array|String
	 *
	 * Uncompressed result, generated by default [[Inflate#onData]]
	 * and [[Inflate#onEnd]] handlers. Filled after you push last chunk
	 * (call [[Inflate#push]] with `Z_FINISH` / `true` param) or if you
	 * push a chunk with explicit flush (call [[Inflate#push]] with
	 * `Z_SYNC_FLUSH` param).
	 **/

	/**
	 * Inflate.err -> Number
	 *
	 * Error code after inflate finished. 0 (Z_OK) on success.
	 * Should be checked if broken data possible.
	 **/

	/**
	 * Inflate.msg -> String
	 *
	 * Error message, if [[Inflate.err]] != 0
	 **/


	/**
	 * new Inflate(options)
	 * - options (Object): zlib inflate options.
	 *
	 * Creates new inflator instance with specified params. Throws exception
	 * on bad params. Supported options:
	 *
	 * - `windowBits`
	 * - `dictionary`
	 *
	 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
	 * for more information on these.
	 *
	 * Additional options, for internal needs:
	 *
	 * - `chunkSize` - size of generated data chunks (16K by default)
	 * - `raw` (Boolean) - do raw inflate
	 * - `to` (String) - if equal to 'string', then result will be converted
	 *   from utf8 to utf16 (javascript) string. When string output requested,
	 *   chunk length can differ from `chunkSize`, depending on content.
	 *
	 * By default, when no options set, autodetect deflate/gzip data format via
	 * wrapper header.
	 *
	 * ##### Example:
	 *
	 * ```javascript
	 * var pako = require('pako')
	 *   , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])
	 *   , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);
	 *
	 * var inflate = new pako.Inflate({ level: 3});
	 *
	 * inflate.push(chunk1, false);
	 * inflate.push(chunk2, true);  // true -> last chunk
	 *
	 * if (inflate.err) { throw new Error(inflate.err); }
	 *
	 * console.log(inflate.result);
	 * ```
	 **/
	function Inflate(options) {
	  if (!(this instanceof Inflate)) return new Inflate(options);

	  this.options = utils.assign({
	    chunkSize: 16384,
	    windowBits: 0,
	    to: ''
	  }, options || {});

	  var opt = this.options;

	  // Force window size for `raw` data, if not set directly,
	  // because we have no header for autodetect.
	  if (opt.raw && (opt.windowBits >= 0) && (opt.windowBits < 16)) {
	    opt.windowBits = -opt.windowBits;
	    if (opt.windowBits === 0) { opt.windowBits = -15; }
	  }

	  // If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate
	  if ((opt.windowBits >= 0) && (opt.windowBits < 16) &&
	      !(options && options.windowBits)) {
	    opt.windowBits += 32;
	  }

	  // Gzip header has no info about windows size, we can do autodetect only
	  // for deflate. So, if window size not set, force it to max when gzip possible
	  if ((opt.windowBits > 15) && (opt.windowBits < 48)) {
	    // bit 3 (16) -> gzipped data
	    // bit 4 (32) -> autodetect gzip/deflate
	    if ((opt.windowBits & 15) === 0) {
	      opt.windowBits |= 15;
	    }
	  }

	  this.err    = 0;      // error code, if happens (0 = Z_OK)
	  this.msg    = '';     // error message
	  this.ended  = false;  // used to avoid multiple onEnd() calls
	  this.chunks = [];     // chunks of compressed data

	  this.strm   = new ZStream();
	  this.strm.avail_out = 0;

	  var status  = zlib_inflate.inflateInit2(
	    this.strm,
	    opt.windowBits
	  );

	  if (status !== c.Z_OK) {
	    throw new Error(msg[status]);
	  }

	  this.header = new GZheader();

	  zlib_inflate.inflateGetHeader(this.strm, this.header);

	  // Setup dictionary
	  if (opt.dictionary) {
	    // Convert data if needed
	    if (typeof opt.dictionary === 'string') {
	      opt.dictionary = strings$1.string2buf(opt.dictionary);
	    } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {
	      opt.dictionary = new Uint8Array(opt.dictionary);
	    }
	    if (opt.raw) { //In raw mode we need to set the dictionary early
	      status = zlib_inflate.inflateSetDictionary(this.strm, opt.dictionary);
	      if (status !== c.Z_OK) {
	        throw new Error(msg[status]);
	      }
	    }
	  }
	}

	/**
	 * Inflate#push(data[, mode]) -> Boolean
	 * - data (Uint8Array|Array|ArrayBuffer|String): input data
	 * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.
	 *   See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.
	 *
	 * Sends input data to inflate pipe, generating [[Inflate#onData]] calls with
	 * new output chunks. Returns `true` on success. The last data block must have
	 * mode Z_FINISH (or `true`). That will flush internal pending buffers and call
	 * [[Inflate#onEnd]]. For interim explicit flushes (without ending the stream) you
	 * can use mode Z_SYNC_FLUSH, keeping the decompression context.
	 *
	 * On fail call [[Inflate#onEnd]] with error code and return false.
	 *
	 * We strongly recommend to use `Uint8Array` on input for best speed (output
	 * format is detected automatically). Also, don't skip last param and always
	 * use the same type in your code (boolean or number). That will improve JS speed.
	 *
	 * For regular `Array`-s make sure all elements are [0..255].
	 *
	 * ##### Example
	 *
	 * ```javascript
	 * push(chunk, false); // push one of data chunks
	 * ...
	 * push(chunk, true);  // push last chunk
	 * ```
	 **/
	Inflate.prototype.push = function (data, mode) {
	  var strm = this.strm;
	  var chunkSize = this.options.chunkSize;
	  var dictionary = this.options.dictionary;
	  var status, _mode;
	  var next_out_utf8, tail, utf8str;

	  // Flag to properly process Z_BUF_ERROR on testing inflate call
	  // when we check that all output data was flushed.
	  var allowBufError = false;

	  if (this.ended) { return false; }
	  _mode = (mode === ~~mode) ? mode : ((mode === true) ? c.Z_FINISH : c.Z_NO_FLUSH);

	  // Convert data if needed
	  if (typeof data === 'string') {
	    // Only binary strings can be decompressed on practice
	    strm.input = strings$1.binstring2buf(data);
	  } else if (toString.call(data) === '[object ArrayBuffer]') {
	    strm.input = new Uint8Array(data);
	  } else {
	    strm.input = data;
	  }

	  strm.next_in = 0;
	  strm.avail_in = strm.input.length;

	  do {
	    if (strm.avail_out === 0) {
	      strm.output = new utils.Buf8(chunkSize);
	      strm.next_out = 0;
	      strm.avail_out = chunkSize;
	    }

	    status = zlib_inflate.inflate(strm, c.Z_NO_FLUSH);    /* no bad return value */

	    if (status === c.Z_NEED_DICT && dictionary) {
	      status = zlib_inflate.inflateSetDictionary(this.strm, dictionary);
	    }

	    if (status === c.Z_BUF_ERROR && allowBufError === true) {
	      status = c.Z_OK;
	      allowBufError = false;
	    }

	    if (status !== c.Z_STREAM_END && status !== c.Z_OK) {
	      this.onEnd(status);
	      this.ended = true;
	      return false;
	    }

	    if (strm.next_out) {
	      if (strm.avail_out === 0 || status === c.Z_STREAM_END || (strm.avail_in === 0 && (_mode === c.Z_FINISH || _mode === c.Z_SYNC_FLUSH))) {

	        if (this.options.to === 'string') {

	          next_out_utf8 = strings$1.utf8border(strm.output, strm.next_out);

	          tail = strm.next_out - next_out_utf8;
	          utf8str = strings$1.buf2string(strm.output, next_out_utf8);

	          // move tail
	          strm.next_out = tail;
	          strm.avail_out = chunkSize - tail;
	          if (tail) { utils.arraySet(strm.output, strm.output, next_out_utf8, tail, 0); }

	          this.onData(utf8str);

	        } else {
	          this.onData(utils.shrinkBuf(strm.output, strm.next_out));
	        }
	      }
	    }

	    // When no more input data, we should check that internal inflate buffers
	    // are flushed. The only way to do it when avail_out = 0 - run one more
	    // inflate pass. But if output data not exists, inflate return Z_BUF_ERROR.
	    // Here we set flag to process this error properly.
	    //
	    // NOTE. Deflate does not return error in this case and does not needs such
	    // logic.
	    if (strm.avail_in === 0 && strm.avail_out === 0) {
	      allowBufError = true;
	    }

	  } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== c.Z_STREAM_END);

	  if (status === c.Z_STREAM_END) {
	    _mode = c.Z_FINISH;
	  }

	  // Finalize on the last chunk.
	  if (_mode === c.Z_FINISH) {
	    status = zlib_inflate.inflateEnd(this.strm);
	    this.onEnd(status);
	    this.ended = true;
	    return status === c.Z_OK;
	  }

	  // callback interim results if Z_SYNC_FLUSH.
	  if (_mode === c.Z_SYNC_FLUSH) {
	    this.onEnd(c.Z_OK);
	    strm.avail_out = 0;
	    return true;
	  }

	  return true;
	};


	/**
	 * Inflate#onData(chunk) -> Void
	 * - chunk (Uint8Array|Array|String): output data. Type of array depends
	 *   on js engine support. When string output requested, each chunk
	 *   will be string.
	 *
	 * By default, stores data blocks in `chunks[]` property and glue
	 * those in `onEnd`. Override this handler, if you need another behaviour.
	 **/
	Inflate.prototype.onData = function (chunk) {
	  this.chunks.push(chunk);
	};


	/**
	 * Inflate#onEnd(status) -> Void
	 * - status (Number): inflate status. 0 (Z_OK) on success,
	 *   other if not.
	 *
	 * Called either after you tell inflate that the input stream is
	 * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)
	 * or if an error happened. By default - join collected chunks,
	 * free memory and fill `results` / `err` properties.
	 **/
	Inflate.prototype.onEnd = function (status) {
	  // On success - join
	  if (status === c.Z_OK) {
	    if (this.options.to === 'string') {
	      // Glue & convert here, until we teach pako to send
	      // utf8 aligned strings to onData
	      this.result = this.chunks.join('');
	    } else {
	      this.result = utils.flattenChunks(this.chunks);
	    }
	  }
	  this.chunks = [];
	  this.err = status;
	  this.msg = this.strm.msg;
	};


	/**
	 * inflate(data[, options]) -> Uint8Array|Array|String
	 * - data (Uint8Array|Array|String): input data to decompress.
	 * - options (Object): zlib inflate options.
	 *
	 * Decompress `data` with inflate/ungzip and `options`. Autodetect
	 * format via wrapper header by default. That's why we don't provide
	 * separate `ungzip` method.
	 *
	 * Supported options are:
	 *
	 * - windowBits
	 *
	 * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)
	 * for more information.
	 *
	 * Sugar (options):
	 *
	 * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify
	 *   negative windowBits implicitly.
	 * - `to` (String) - if equal to 'string', then result will be converted
	 *   from utf8 to utf16 (javascript) string. When string output requested,
	 *   chunk length can differ from `chunkSize`, depending on content.
	 *
	 *
	 * ##### Example:
	 *
	 * ```javascript
	 * var pako = require('pako')
	 *   , input = pako.deflate([1,2,3,4,5,6,7,8,9])
	 *   , output;
	 *
	 * try {
	 *   output = pako.inflate(input);
	 * } catch (err)
	 *   console.log(err);
	 * }
	 * ```
	 **/
	function inflate$2(input, options) {
	  var inflator = new Inflate(options);

	  inflator.push(input, true);

	  // That will never happens, if you don't cheat with options :)
	  if (inflator.err) { throw inflator.msg || msg[inflator.err]; }

	  return inflator.result;
	}


	/**
	 * inflateRaw(data[, options]) -> Uint8Array|Array|String
	 * - data (Uint8Array|Array|String): input data to decompress.
	 * - options (Object): zlib inflate options.
	 *
	 * The same as [[inflate]], but creates raw data, without wrapper
	 * (header and adler32 crc).
	 **/
	function inflateRaw(input, options) {
	  options = options || {};
	  options.raw = true;
	  return inflate$2(input, options);
	}


	/**
	 * ungzip(data[, options]) -> Uint8Array|Array|String
	 * - data (Uint8Array|Array|String): input data to decompress.
	 * - options (Object): zlib inflate options.
	 *
	 * Just shortcut to [[inflate]], because it autodetects format
	 * by header.content. Done for convenience.
	 **/


	inflate.__exports.Inflate = Inflate;
	inflate.__exports.inflate = inflate$2;
	inflate.__exports.inflateRaw = inflateRaw;
	inflate.__exports.ungzip  = inflate$2;
	return inflate.__exports;
}

exports.__require = requireInflate;
