// Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
// MIT License. See license.txt

wn.provide('wn.utils');

wn.utils = {
	get_file_link: function(filename) {
		if(wn.utils.is_url(filename)) {
			return filename;
		} else if(filename.indexOf("/")===-1) {
			return "files/" + filename;
		} else {
			return filename;
		}
	},
	is_html: function(txt) {
		if(txt.indexOf("<br>")==-1 && txt.indexOf("<p")==-1 
			&& txt.indexOf("<img")==-1 && txt.indexOf("<div")==-1) {
			return false;
		}
		return true;
	},
	is_url: function(txt) {
		return txt.toLowerCase().substr(0,7)=='http://'
			|| txt.toLowerCase().substr(0,8)=='https://'
	},
	remove_script_and_style: function(txt) {
		return (!txt || (txt.indexOf("<script>")===-1 && txt.indexOf("<style>")===-1)) ? txt :
			$("<div></div>").html(txt).find("script,noscript,style,title,meta").remove().end().html();
	},
	filter_dict: function(dict, filters) {
		var ret = [];
		if(typeof filters=='string') {
			return [dict[filters]]
		}
		$.each(dict, function(i, d) {
			for(key in filters) {
				if($.isArray(filters[key])) {
					if(filters[key][0]=="in") {
						if(filters[key][1].indexOf(d[key])==-1)
							return;
					} else if(filters[key][0]=="not in") {
						if(filters[key][1].indexOf(d[key])!=-1)
							return;
					} else if(filters[key][0]=="<") {
						if (!(d[key] < filters[key])) return;
					} else if(filters[key][0]=="<=") {
						if (!(d[key] <= filters[key])) return;
					} else if(filters[key][0]==">") {
						if (!(d[key] > filters[key])) return;
					} else if(filters[key][0]==">=") {
						if (!(d[key] >= filters[key])) return;
					}
				} else {
					if(d[key]!=filters[key]) return;
				}
			}
			ret.push(d);
		});
		return ret;
	},
	comma_or: function(list) {
		return wn.utils.comma_sep(list, " " + wn._("or") + " ");
	},
	comma_and: function(list) {
		return wn.utils.comma_sep(list, " " + wn._("and") + " ");
	},
	comma_sep: function(list, sep) {
		if(list instanceof Array) {
			if(list.length==0) {
				return "";
			} else if (list.length==1) {
				return list[0];
			} else {
				return list.slice(0, list.length-1).join(", ") + sep + list.slice(-1)[0];
			}
		} else {
			return list;
		}
	},
	set_intro: function(me, wrapper, txt) {
		if(!me.intro_area) {
			me.intro_area = $('<div class="alert alert-info form-intro-area">')
				.prependTo(wrapper);
		}
		if(txt) {
			me.intro_area.html(txt);
		} else {
			me.intro_area.remove();
			me.intro_area = null;
		}
	},
	set_footnote: function(me, wrapper, txt) {
		if(!me.footnote_area) {
			me.footnote_area = $('<div class="alert alert-info form-intro-area" style="margin-top: 20px;">')
				.appendTo(wrapper);
		}
		
		if(txt) {
			if(txt.search(/<p>/)==-1) txt = '<p>' + txt + '</p>';
			me.footnote_area.html(txt);
		} else {
			me.footnote_area.remove();
			me.footnote_area = null;
		}
	},
	get_args_dict_from_url: function(txt) {
		var args = {};
		$.each(decodeURIComponent(txt).split("&"), function(i, arg) {
			arg = arg.split("=");
			args[arg[0]] = arg[1]
		});
		return args;
	},
	get_url_from_dict: function(args) {
		return $.map(args, function(val, key) { 
			if(val!==null) 
				return encodeURIComponent(key)+"="+encodeURIComponent(val); 
			else 
				return null; 
		}).join("&") || "";
	},
	validate_type: function ( val, type ) {
		// from https://github.com/guillaumepotier/Parsley.js/blob/master/parsley.js#L81
		var regExp;

		switch ( type ) {
			case "number":
				regExp = /^-?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/;
				break;
			case "digits":
				regExp = /^\d+$/;
				break;
			case "alphanum":
				regExp = /^\w+$/;
				break;
			case "email":
				regExp = /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i;
				break;
			case "url":
				regExp = /^(https?|s?ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i;
				break;
			case "dateIso":
				regExp = /^(\d{4})\D?(0[1-9]|1[0-2])\D?([12]\d|0[1-9]|3[01])$/;
				break;
			default:
				return false;
				break;
		}

		// test regExp if not null
		return '' !== val ? regExp.test( val ) : false;
	},
	guess_style: function(text, default_style) {
		var style = default_style;
		if(!text) 
			return style;
		if(has_words(["Open", "Pending"], text)) {
			style = "danger";
		} else if(has_words(["Closed", "Finished", "Converted", "Completed", "Confirmed", 
			"Approved", "Yes", "Active"], text)) {
			style = "success";
		} else if(has_words(["Submitted"], text)) {
			style = "info";
		}
		return style;
	},
	
	sort: function(list, key, compare_type, reverse) {
		if(list.length < 2)
			return list;

		var sort_fn = {
			"string": function(a, b) {
				return cstr(a[key]).localeCompare(cstr(b[key]));
			},
			"number": function(a, b) {
				return flt(a[key]) - flt(b[key]);
			}
		};
				
		if(!compare_type)
		 	compare_type = typeof list[0][key]==="string" ? "string" : "number";
		
		list.sort(sort_fn[compare_type]);
		
		if(reverse) { list.reverse(); }
		
		return list;
	},
	unique: function(list) {
		var dict = {},
			arr = [];
		for(var i=0, l=list.length; i < l; i++) {
			if(!dict.hasOwnProperty(list[i])) {
				dict[list[i]] = null;
				arr.push(list[i]);
			}
		}
		return arr;
	},
	
	dict: function(keys,values) {
		// make dictionaries from keys and values
		var out = [];
		$.each(values, function(row_idx, row) {
			var new_row = {};
			$.each(keys, function(key_idx, key) {
				new_row[key] = row[key_idx];
			})
			out.push(new_row);
		});
		return out;
	},
	
	sum: function(list) {
		return list.reduce(function(previous_value, current_value) { return flt(previous_value) + flt(current_value); }, 0.0);
	},
	
	resize_image: function(reader, callback, max_width, max_height) {
		var tempImg = new Image();
		if(!max_width) max_width = 600;
		if(!max_height) max_height = 400;
		tempImg.src = reader.result;
		
		tempImg.onload = function() {
			var tempW = tempImg.width;
			var tempH = tempImg.height;
			if (tempW > tempH) {
				if (tempW > max_width) {
				   tempH *= max_width / tempW;
				   tempW = max_width;
				}
			} else {
				if (tempH > max_height) {
				   tempW *= max_height / tempH;
				   tempH = max_height;
				}
			}

			var canvas = document.createElement('canvas');
			canvas.width = tempW;
			canvas.height = tempH;
			var ctx = canvas.getContext("2d");
			ctx.drawImage(this, 0, 0, tempW, tempH);
			var dataURL = canvas.toDataURL("image/jpeg");
			setTimeout(function() { callback(dataURL); }, 10 );
		}
	}
};