// The MIT License (MIT)

// Typed.js | Copyright (c) 2016 Matt Boldt | www.mattboldt.com

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.




! function(window, document, $) {

	"use strict";

	var Typed = function(el, options) {
		var self = this;

		// chosen element to manipulate text
		this.el = el;

		// options
		this.options = {};
		Object.keys(defaults).forEach(function(key) {
			self.options[key] = defaults[key];
		});
		Object.keys(options).forEach(function(key) {
			self.options[key] = options[key];
		});

		// attribute to type into
		this.isInput = this.el.tagName.toLowerCase() === 'input';
		this.attr = this.options.attr;

		// show cursor
		this.showCursor = this.isInput ? false : this.options.showCursor;

		// text content of element
		this.elContent = this.attr ? this.el.getAttribute(this.attr) : this.el.textContent;

		// html or plain text
		this.contentType = this.options.contentType;

		// typing speed
		this.typeSpeed = this.options.typeSpeed;

		// add a delay before typing starts
		this.startDelay = this.options.startDelay;

		// backspacing speed
		this.backSpeed = this.options.backSpeed;

		// amount of time to wait before backspacing
		this.backDelay = this.options.backDelay;

		// Fade out instead of backspace
		this.fadeOut = this.options.fadeOut;
		this.fadeOutClass = this.options.fadeOutClass;
		this.fadeOutDelay = this.options.fadeOutDelay;

		// div containing strings
		if($ && this.options.stringsElement instanceof $) {
			this.stringsElement = this.options.stringsElement[0]
		} else {
			this.stringsElement = this.options.stringsElement;
		}

		// input strings of text
		this.strings = this.options.strings;

		// character number position of current string
		this.strPos = 0;

		// current array position
		this.arrayPos = 0;

		// number to stop backspacing on.
		// default 0, can change depending on how many chars
		// you want to remove at the time
		this.stopNum = 0;

		// Looping logic
		this.loop = this.options.loop;
		this.loopCount = this.options.loopCount;
		this.curLoop = 0;

		// for stopping
		this.stop = false;

		// custom cursor
		this.cursorChar = this.options.cursorChar;

		// shuffle the strings
		this.shuffle = this.options.shuffle;
		// the order of strings
		this.sequence = [];

		// All systems go!
		this.build();
	};

	Typed.prototype = {

		constructor: Typed,

		init: function() {
			// begin the loop w/ first current string (global self.strings)
			// current string will be passed as an argument each time after this
			var self = this;
			self.timeout = setTimeout(function() {
				for (var i=0;i<self.strings.length;++i) self.sequence[i]=i;

				// shuffle the array if true
				if(self.shuffle) self.sequence = self.shuffleArray(self.sequence);

				// Start typing
				self.typewrite(self.strings[self.sequence[self.arrayPos]], self.strPos);
			}, self.startDelay);
		},

		build: function() {
			var self = this;
			// Insert cursor
			if (this.showCursor === true) {
				this.cursor = document.createElement('span');
				this.cursor.className = 'typed-cursor';
				this.cursor.innerHTML = this.cursorChar;
				this.el.parentNode && this.el.parentNode.insertBefore(this.cursor, this.el.nextSibling);
			}
			if (this.stringsElement) {
				this.strings = [];
				this.stringsElement.style.display = 'none';
				var strings = Array.prototype.slice.apply(this.stringsElement.children);
				strings.forEach(function(stringElement){
					self.strings.push(stringElement.innerHTML);
				});
			}
			this.init();
		},

		// pass current string state to each function, types 1 char per call
		typewrite: function(curString, curStrPos) {
			// exit when stopped
			if (this.stop === true) {
				return;
			}

			if (this.fadeOut && this.el.classList.contains(this.fadeOutClass)) {
				this.el.classList.remove(this.fadeOutClass);
				this.cursor.classList.remove(this.fadeOutClass);
			}

			// varying values for setTimeout during typing
			// can't be global since number changes each time loop is executed
			var humanize = Math.round(Math.random() * (100 - 30)) + this.typeSpeed;
			var self = this;

			// ------------- optional ------------- //
			// backpaces a certain string faster
			// ------------------------------------ //
			// if (self.arrayPos == 1){
			//  self.backDelay = 50;
			// }
			// else{ self.backDelay = 500; }

			// contain typing function in a timeout humanize'd delay
			self.timeout = setTimeout(function() {
				// check for an escape character before a pause value
				// format: \^\d+ .. eg: ^1000 .. should be able to print the ^ too using ^^
				// single ^ are removed from string
				var charPause = 0;
				var substr = curString.substr(curStrPos);
				if (substr.charAt(0) === '^') {
					var skip = 1; // skip atleast 1
					if (/^\^\d+/.test(substr)) {
						substr = /\d+/.exec(substr)[0];
						skip += substr.length;
						charPause = parseInt(substr);
					}

					// strip out the escape character and pause value so they're not printed
					curString = curString.substring(0, curStrPos) + curString.substring(curStrPos + skip);
				}

				if (self.contentType === 'html') {
					// skip over html tags while typing
					var curChar = curString.substr(curStrPos).charAt(0);
					if (curChar === '<' || curChar === '&') {
						var tag = '';
						var endTag = '';
						if (curChar === '<') {
							endTag = '>'
						}
						else {
							endTag = ';'
						}
						while (curString.substr(curStrPos + 1).charAt(0) !== endTag) {
							tag += curString.substr(curStrPos).charAt(0);
							curStrPos++;
							if (curStrPos + 1 > curString.length) { break; }
						}
						curStrPos++;
						tag += endTag;
					}
				}

				// timeout for any pause after a character
				self.timeout = setTimeout(function() {
					if (curStrPos === curString.length) {
						// fires callback function
						self.options.onStringTyped(self.arrayPos);

						// is this the final string
						if (self.arrayPos === self.strings.length - 1) {
							// animation that occurs on the last typed string
							self.options.callback();

							self.curLoop++;

							// quit if we wont loop back
							if (self.loop === false || self.curLoop === self.loopCount)
								return;
						}

						self.timeout = setTimeout(function() {
							self.backspace(curString, curStrPos);
						}, self.backDelay);

					} else {

						/* call before functions if applicable */
						if (curStrPos === 0) {
							self.options.preStringTyped(self.arrayPos);
						}

						// start typing each new char into existing string
						// curString: arg, self.el.html: original text inside element
						var nextString = curString.substr(0, curStrPos + 1);
						if (self.attr) {
							self.el.setAttribute(self.attr, nextString);
						} else {
							if (self.isInput) {
								self.el.value = nextString;
							} else if (self.contentType === 'html') {
								self.el.innerHTML = nextString;
							} else {
								self.el.textContent = nextString;
							}
						}

						// add characters one by one
						curStrPos++;
						// loop the function
						self.typewrite(curString, curStrPos);
					}
					// end of character pause
				}, charPause);

				// humanized value for typing
			}, humanize);

		},

		backspace: function(curString, curStrPos) {
			var self = this;
			// exit when stopped
			if (this.stop === true) {
				return;
			}

			if (this.fadeOut){
				this.initFadeOut();
				return;
			}

			// varying values for setTimeout during typing
			// can't be global since number changes each time loop is executed
			var humanize = this.backSpeed;

			self.timeout = setTimeout(function() {

				// ----- this part is optional ----- //
				// check string array position
				// on the first string, only delete one word
				// the stopNum actually represents the amount of chars to
				// keep in the current string. In my case it's 14.
				// if (self.arrayPos == 1){
				//  self.stopNum = 14;
				// }
				//every other time, delete the whole typed string
				// else{
				//  self.stopNum = 0;
				// }

				if (self.contentType === 'html') {
					// skip over html tags while backspacing
					if (curString.substr(curStrPos).charAt(0) === '>') {
						var tag = '';
						while (curString.substr(curStrPos - 1).charAt(0) !== '<') {
							tag -= curString.substr(curStrPos).charAt(0);
							curStrPos--;
							if (curStrPos < 0) { break; }
						}
						curStrPos--;
						tag += '<';
					}
				}

				// ----- continue important stuff ----- //
				// replace text with base text + typed characters
				var nextString = curString.substr(0, curStrPos);
				self.replaceText(nextString);

				curStrPos = 0;

				// if the number (id of character in current string) is
				// less than the stop number, keep going
				if (curStrPos > self.stopNum) {
					// subtract characters one by one
					curStrPos--;
					// loop the function
					self.backspace(curString, curStrPos);
				}
				// if the stop number has been reached, increase
				// array position to next string
				else if (curStrPos <= self.stopNum) {
					self.arrayPos++;

					if (self.arrayPos === self.strings.length) {
						self.arrayPos = 0;

						// Shuffle sequence again
						if(self.shuffle) self.sequence = self.shuffleArray(self.sequence);

						self.init();
					} else
						self.typewrite(self.strings[self.sequence[self.arrayPos]], curStrPos);
				}

				// humanized value for typing
			}, humanize);

		},

		// Adds a CSS class to fade out current string
		initFadeOut: function(){
			self = this;
			this.el.className += ' ' + this.fadeOutClass;
			this.cursor.className += ' ' + this.fadeOutClass;
			return setTimeout(function() {
				self.arrayPos++;
				self.replaceText('')
				self.typewrite(self.strings[self.sequence[self.arrayPos]], 0);
			}, self.fadeOutDelay);
		},

		// Replaces current text in the HTML element
		replaceText: function(str) {
			if (this.attr) {
				this.el.setAttribute(this.attr, str);
			} else {
				if (this.isInput) {
					this.el.value = str;
				} else if (this.contentType === 'html') {
					this.el.innerHTML = str;
				} else {
					this.el.textContent = str;
				}
			}
		},

		// Shuffles the numbers in the given array.
		shuffleArray: function(array) {
			var tmp, current, top = array.length;
			if(top) while(--top) {
				current = Math.floor(Math.random() * (top + 1));
				tmp = array[current];
				array[current] = array[top];
				array[top] = tmp;
			}
			return array;
		},

		// Start & Stop currently not working

		// , stop: function() {
		//     var self = this;

		//     self.stop = true;
		//     clearInterval(self.timeout);
		// }

		// , start: function() {
		//     var self = this;
		//     if(self.stop === false)
		//        return;

		//     this.stop = false;
		//     this.init();
		// }

		// Reset and rebuild the element
		reset: function() {
			var self = this;
			clearInterval(self.timeout);
			var id = this.el.getAttribute('id');
			this.el.textContent = '';
			if (typeof this.cursor !== 'undefined' && typeof this.cursor.parentNode !== 'undefined') {
				this.cursor.parentNode.removeChild(this.cursor);
			}
			this.strPos = 0;
			this.arrayPos = 0;
			this.curLoop = 0;
			// Send the callback
			this.options.resetCallback();
		}

	};

	Typed.new = function(selector, option) {
		var elements = Array.prototype.slice.apply(document.querySelectorAll(selector));
		elements.forEach(function(element) {
			var instance = element._typed,
			    options = typeof option == 'object' && option;
			if (instance) { instance.reset(); }
			element._typed = instance = new Typed(element, options);
			if (typeof option == 'string') instance[option]();
		});
	};

	if ($) {
		$.fn.typed = function(option) {
			return this.each(function() {
				var $this = $(this),
				    data = $this.data('typed'),
				    options = typeof option == 'object' && option;
				if (data) { data.reset(); }
				$this.data('typed', (data = new Typed(this, options)));
				if (typeof option == 'string') data[option]();
			});
		};
	}

	window.Typed = Typed;

	var defaults = {
		strings: ["These are the default values...", "You know what you should do?", "Use your own!", "Have a great day!"],
		stringsElement: null,
		// typing speed
		typeSpeed: 0,
		// time before typing starts
		startDelay: 0,
		// backspacing speed
		backSpeed: 0,
		// shuffle the strings
		shuffle: false,
		// time before backspacing
		backDelay: 500,
		// Fade out instead of backspace
		fadeOut: false,
		fadeOutClass: 'typed-fade-out',
		fadeOutDelay: 500, // milliseconds
		// loop
		loop: false,
		// false = infinite
		loopCount: false,
		// show cursor
		showCursor: true,
		// character for cursor
		cursorChar: "|",
		// attribute to type (null == text)
		attr: null,
		// either html or text
		contentType: 'html',
		// call when done callback function
		callback: function() {},
		// starting callback function before each string
		preStringTyped: function() {},
		//callback for every typed string
		onStringTyped: function() {},
		// callback for reset
		resetCallback: function() {}
	};


}(window, document, window.jQuery);