'use strict';
/*
An OxDoc comment is an inline or  multi-line comment that starts with `@`:
```
//@ ...
/*@
...
*/
```
The syntax is simple: almost every line has the form `name <type> summary`. If
it doesn't, its meaning depends on its context. 
*/
this.My = {};

/*
If the first line of the comment doesn't match `name <type> summary`, it is a
section definition. Here, it marks a section named 'Primitives'.
*/
//@ Primitives

/*
This inline comment documents an item by providing its name, type and one-line
summary.
*/
//@ My.REQUEST_TIMEOUT <number> Request timeout, in milliseconds
My.REQUEST_TIMEOUT = 60000;

/*
In a multiline comment, lines that follow the inital definition are indented, as
they refer to the item defined in the line above. Lines that don't match `name
<type> summary` are parsed as a description. Like the summary, the description
can contain `markdown`.
*/
/*@
My.MAGIC_CONSTANT <number> Magic constant, needed for HTTP requests
    Please note that the value of `My.MAGIC_CONSTANT` (either `23` or `42`) is
    browser-dependent.
*/
My.MAGIC_CONSTANT = navigator.userAgent.length % 2 ? 23 : 42;

/*
This defines a new section named 'Objects'.
*/
//@ Objects

/*
Lines that start with `#` are inline comments. The follwing lines document
properties of the `My.favorites` object. This example shows all possible values
for `type`. These values can be shortened, it's sufficient to specify their
first character.
*/
/*@
My.favorites <object> ...
    # Properties  --------------------------------------------------------------
    array       <a> My favorite array
    boolean     <b> My favorite boolean value
    date        <d> My favorite date
    error       <e> My favorite error
    function    <f> My favorite function
    arguments   <g> My favorite arguments
    htmlelement <h> My favorite HTML element
    nodelist    <l> My favorite nodelist
    number      <n> My favorite number
    object      <o> My favorite object
    regexp      <r> My favorite regular expression
    string      <s> My favorite string
    undefined   <u> Undefined is an all-time favorite
    window      <w> ...
    other       <+> ...
    any         <*> Favorite of the day
    # Events -------------------------------------------------------------------
    event       <!> Fires when My.favorite['function'] is called
*/
My.favorites = (function() {
    var favorites = {
            array: [],
            boolean: false,
            date: new Date(),
            error: new Error(),
            'function': function() {
                My.triggerEvent(this, 'event');
            },
            arguments: (function() { return arguments; }()),
            htmlelement: document.createElement('a'),
            nodelist: document.getElementsByTagName('a'),
            number: 0,
            object: {},
            regexp: new RegExp(),
            string: '',
            'undefined': void 0,
            'window': window,
            other: document
        },
        keys = Object.keys(favorites);
    favorites.any = favorites[keys[Math.floor(Math.random() * keys.length)]];
    return favorites;
}());

/*
Documentation can be nested. In other words, one can document the properties of
a property (of a property...). Also, if all elements of an array are of a known
type (in this case `string`), one can mark the type as `<[s]>` instead of just
`<array>`.
*/
/*@
My.HTMLUtils <o> HTML Utilities
    namedEntities <[s]> Named HTML entities
    replace <o> Entity decoding utilities
        namedEntities <a> Can be passed to `String.prototype.replace`
            0 <r> Matches named entities
            1 <f> Decodes named entities
        numericEntities <a> Can be passed to `String.prototype.replace`
            0 <r> Matches numeric entities
            1 <f> Decodes numeric entities
*/
My.HTMLUtils = (function() {
    var chars = '"&\'<>',
        entities = ['&quot;', '&amp;', '&apos;', '&lt;', '&gt;'];
    return {
        namedEntities: entities,
        replace: {
            namedEntities: [
                new RegExp('(' + entities.join('|') + ')', 'g'),
                function(match) {
                    return chars[entities.indexOf(match)];
                }
            ],
            numericEntities: [
                /&#([0-9A-FX]+);/gi,
                function(match, code) {
                    return String.fromCharCode(
                        /^X/i.test(code)
                            ? parseInt(code.slice(1), 16)
                            : parseInt(code, 10)
                    );
                }
            ],
        }
    };
}());

/*
The beginning of another section, named 'Functions'.
*/
//@ Functions

/*
In the case of a function, the indented lines don't document properties, but the
function's signature, return value and arguments. Signature and return value are
just a special case of `name <type> summary`, where `name` has the form
`(arguments) ->`. If an item can be of more than one type (in this case `string`
or `function`), this is documented as `<s|f>`. If it has a default value (in
this case the string `'GET'`), this is documented as `<s|'GET'>`. In the case of
a `function`-type argument (usually a callback function), there is no return
value to document, only the arguments it gets passed.
*/
/*@
My.readURL <f> Asynchronously reads a remote resource
    (url[, method], callback) -> <u> undefined
        Please note that the return value of `My.readURL` may change in the
        future.
    url <s|f> Remote URL, or function that returns one
    method <s|'GET'> Request method ('GET', 'POST', 'PUT' or 'DELETE')
    callback <f> Callback function
        result <s|null> Response text, or `null` in case of an error
        error <o|null> Error object, or `null` in case of success
            code <n> Error code
            text <s> Error text
*/
My.readURL = function(url, method, callback) {
    var request = new XMLHttpRequest();
    if (Ox.isFunction(url)) {
        url = url();
    }
    if (arguments.length == 2) {
        callback = method;
        method = 'GET';
    }
    request.open(method, url, true);
    request.onreadystatechange = function() {
        if (request.readyState == 4) {
            if (request.status == 200) {
                callback(request.responseText, null);
            } else {
                callback(null, {
                    code: request.status,
                    text: request.statusText
                });
            }
        }
    };
    request.send();
};

/*
If a function's return value depends on the absence or presence of optional
arguments, there can be multiple `(arguments) -> <type> summary` lines.
*/
/*@
My.isOdd <f> Synchronously or asynchronously computes if a given number is odd
    (number) -> <b> True if the number is odd
    (number, callback) -> <u> undefined
    number <n> Any number
    callback <f> Callback function
        isOdd <b> True if the number is odd
        ms <n> Time it took to compute the result, in milliseconds
*/
My.isOdd = function(number, callback) {
    var time = +new Date, isOdd = !!(number % 2);
    if (callback) {
        callback(isOdd, +new Date - time);
    } else {
        return isOdd;
    }
};

/*
Another case for multiple `(arguments) -> <type> summary` lines are functions
whose signature cannot be represented in `(required[, optional])` notation. For
a range function — `(stop)` or `(start, stop)` or `(start, stop, step)` — the
notation `([start, ]stop[, step])` would be ambigious, since you cannot call it
with `(stop, step)`.
*/
/*@
My.range <f> Returns a python-style range
    (b)       -> <[n]> Integers from 0 (inclusive) to b (exclusive)
    (a, b)    -> <[n]> Integers from a (inclusice) to b (exclusive)
    (a, b, c) -> <[n]> Numbers from a (inclusive) to b (exclusive), growing by c
*/
My.range = function() {
    var a = [];
    Ox.loop.apply(null, Ox.toArray(arguments).concat(function(i) {
        a.push(i);
    }));
    return a;
};

/*
In case a function has a property or method one wants to document, it gets
prefixed with `.`, in order to differentiate it from an argument.
*/
/*@
My.localStorage <f> Returns a localStorage handler for a given namespace
    (ns) -> storage <f> localStorage handler
        () -> <o> Returns all key:value pairs
        (key) -> <*> Returns one value
        (key, value) -> <f> Sets one value, returns the handler
        ({key: value, ...}) -> <f> Sets one or more values, returns the handler
        key <s> Any string
        value <*> Any value that can be JSON-serialized
        .delete <f> Delete method
            () -> <f> Deletes all key:value pairs, returns the handler
            (key[, ...]) -> <f> Deletes one or more pairs, returns the handler
            key <s> Any string
    ns <s> Namespace
*/
My.localStorage = (function() {
    if (!window.localStorage) {
        window.localStorage = {};
    }
    return function(ns) {
        function storage(key, value) {
            var args, ret;
            if (arguments.length == 0) {
                ret = {};
                Ox.forEach(localStorage, function(value, key) {
                    if (Ox.startsWith(key, ns + '.')) {
                        ret[key.slice(ns.length + 1)] = JSON.parse(value);
                    }
                });
            } else if (arguments.length == 1 && !Ox.isObject(key)) {
                value = localStorage[ns + '.' + key];
                ret = Ox.isUndefined(value) ? void 0 : JSON.parse(value);
            } else {
                Ox.forEach(Ox.makeObject(arguments), function(value, key) {
                    localStorage[ns + '.' + key] = JSON.stringify(value);
                });
                ret = this;
            }
            return ret;
        };
        storage.delete = function() {
            var keys = arguments.length == 0 ? Object.keys(storage())
                : Ox.toArray(arguments)
            keys.forEach(function(key) {
                delete localStorage[ns + '.' + key];
            });
            return storage;
        };
        return storage;
    };
}());

/*
And one more section, named 'UI Elements'.
*/
//@ UI Element

/*@
My.Box <f> A very simple colored box
    options <o> Options
        color <[n]> RGB value
    self <o> Shared private object
    ([options[, self]]) -> <o> Box object
        grayscale <!> Fires when changing the color of the box to grayscale
            color <n> Value between `0` and `255`
*/
My.Box = function(options, self) {
    self = self || {};
    var that = Ox.Element({}, self)
        .defaults({color: [255, 0, 0]})
        .options(options || {})
        .update(setColor)
        .css({width: '256px', height: '256px'});
    function setColor() {
        that.css({background: 'rgb(' + self.options.color.join(', ') + ')'});
    }
    /*@
    .toGrayscale <f> Changes the color of the box to grayscale.
        () -> <o> The box object
    */
    that.toGrayscale = function() {
        return that.options({
            color: Ox.repeat([Ox.avg(self.options.color)], 3)
        }).triggerEvent('grayscale', {color: self.options.color[0]});
    };
    return that;
};

//@
Ox.load('UI', function() {
    var file = 'example.js',
        path = Ox.PATH + '../examples/documentation/oxdoc/js/';
    Ox.get(path + file, function(source) {
        var doc = Ox.doc(source);
        Ox.TabPanel({
            content: {
                source: Ox.SyntaxHighlighter({source: path + file}),
                doc: Ox.TreeList({data: doc}),
                docpanel: Ox.DocPanel({
                    expanded: true,
                    files: 'example.js',
                    path: path
                })
            },
            tabs: [
                {id: 'source', title: 'source'},
                {id: 'doc', title: 'doc = Ox.doc(source)'},
                {id: 'docpanel', title: 'Ox.DocPanel({items: doc})'}
            ]
        }).appendTo(Ox.$body);
    });
});