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# Copyright 2006 James Tauber and contributors

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#

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# Licensed under the Apache License, Version 2.0 (the "License");

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# you may not use this file except in compliance with the License.

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# You may obtain a copy of the License at

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#

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#     http://www.apache.org/licenses/LICENSE-2.0

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#

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# Unless required by applicable law or agreed to in writing, software

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# distributed under the License is distributed on an "AS IS" BASIS,

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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

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# See the License for the specific language governing permissions and

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# limitations under the License.

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# iteration from Bob Ippolito's Iteration in JavaScript

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from __pyjamas__ import JS

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# must declare import _before_ importing sys

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def import_module(path, parent_module, module_name, dynamic=1, async=False):

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    """

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    """

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    JS("""

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        var cache_file;

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        if (module_name == "sys" || module_name == 'pyjslib')

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        {

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            /*module_load_request[module_name] = 1;*/

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            return;

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        }

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        if (path == null)

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        {

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            path = './';

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        }

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        var override_name = sys.platform + "." + module_name;

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        if (((sys.overrides != null) &&

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             (sys.overrides.has_key(override_name))))

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        {

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            cache_file =  sys.overrides.__getitem__(override_name) ;

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        }

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        else

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        {

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            cache_file =  module_name ;

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        }

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        cache_file = (path + cache_file + '.cache.js' ) ;

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        //alert("cache " + cache_file + " " + module_name + " " + parent_module);

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        /* already loaded? */

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        if (module_load_request[module_name])

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        {

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            if (module_load_request[module_name] >= 3 && parent_module != null)

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            {

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                //onload_fn = parent_module + '.' + module_name + ' = ' + module_name + ';';

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                //pyjs_eval(onload_fn); /* set up the parent-module namespace */

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            }

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            return;

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        }

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        if (typeof (module_load_request[module_name]) == 'undefined')

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        {

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            module_load_request[module_name] = 1;

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        }

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        /* following a load, this first executes the script

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         * "preparation" function MODULENAME_loaded_fn()

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         * and then sets up the loaded module in the namespace

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         * of the parent.

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         */

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        onload_fn = ''; // module_name + "_loaded_fn();"

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        if (parent_module != null)

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        {

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            //onload_fn += parent_module + '.' + module_name + ' = ' + module_name + ';';

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            /*pmod = parent_module + '.' + module_name;

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            onload_fn += 'alert("' + pmod + '"+' + pmod+');';*/

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        }

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        if (dynamic)

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        {

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            /* this one tacks the script onto the end of the DOM

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             */

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            pyjs_load_script(cache_file, onload_fn, async);

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            /* this one actually RUNS the script (eval) into the page.

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               my feeling is that this would be better for non-async

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               but i can't get it to work entirely yet.

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             */

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            /*pyjs_ajax_eval(cache_file, onload_fn, async);*/

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        }

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        else

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        {

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            if (module_name != "pyjslib" &&

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                module_name != "sys")

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                pyjs_eval(onload_fn);

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        }

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    """)

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JS("""

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function import_wait(proceed_fn, parent_mod, dynamic) {

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    var data = '';

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    var element = $doc.createElement("div");

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    $doc.body.appendChild(element);

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    function write_dom(txt) {

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        element.innerHTML = txt + '<br />';

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    }

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    var timeoutperiod = 1;

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    if (dynamic)

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        var timeoutperiod = 1;

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    var wait = function() {

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        var status = '';

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        for (l in module_load_request)

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        {

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            var m = module_load_request[l];

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            if (l == "sys" || l == 'pyjslib')

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                continue;

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            status += l + m + " ";

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        }

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        //write_dom( " import wait " + wait_count + " " + status + " parent_mod " + parent_mod);

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        wait_count += 1;

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        if (status == '')

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        {

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            setTimeout(wait, timeoutperiod);

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            return;

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        }

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        for (l in module_load_request)

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        {

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            var m = module_load_request[l];

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            if (l == "sys" || l == 'pyjslib')

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            {

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                module_load_request[l] = 4;

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                continue;

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            }

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            if ((parent_mod != null) && (l == parent_mod))

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            {

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                if (m == 1)

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                {

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                    setTimeout(wait, timeoutperiod);

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                    return;

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                }

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                if (m == 2)

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                {

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                    /* cheat and move app on to next stage */

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                    module_load_request[l] = 3;

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                }

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            }

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            if (m == 1 || m == 2)

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            {

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                setTimeout(wait, timeoutperiod);

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                return;

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            }

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            if (m == 3)

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            {

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                //alert("waited for module " + l + ": loaded");

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                module_load_request[l] = 4;

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                mod_fn = modules[l];

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            }

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        }

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        //alert("module wait done");

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        if (proceed_fn.importDone)

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            proceed_fn.importDone(proceed_fn);

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        else

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            proceed_fn();

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    }

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    wait();

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}

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""")

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class Object:

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    pass

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object = Object

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class Modload:

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    def __init__(self, path, app_modlist, app_imported_fn, dynamic,

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                 parent_mod):

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        self.app_modlist = app_modlist

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        self.app_imported_fn = app_imported_fn

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        self.path = path

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        self.idx = 0

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        self.dynamic = dynamic

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        self.parent_mod = parent_mod

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    def next(self):

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        for i in range(len(self.app_modlist[self.idx])):

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            app = self.app_modlist[self.idx][i]

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            import_module(self.path, self.parent_mod, app, self.dynamic, True)

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        self.idx += 1

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        if self.idx >= len(self.app_modlist):

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            import_wait(self.app_imported_fn, self.parent_mod, self.dynamic)

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        else:

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            import_wait(getattr(self, "next"), self.parent_mod, self.dynamic)

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def get_module(module_name):

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    ev = "__mod = %s;" % module_name

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    JS("pyjs_eval(ev);")

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    return __mod

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def preload_app_modules(path, app_modnames, app_imported_fn, dynamic,

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                        parent_mod=None):

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    loader = Modload(path, app_modnames, app_imported_fn, dynamic, parent_mod)

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    loader.next()

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class BaseException:

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    name = "BaseException"

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    def __init__(self, *args):

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        self.args = args

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    def __str__(self):

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        if len(self.args) is 0:

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            return ''

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        elif len(self.args) is 1:

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            return repr(self.args[0])

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        return repr(self.args)

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    def toString(self):

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        return str(self)

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class Exception(BaseException):

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    name = "Exception"

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class TypeError(BaseException):

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    name = "TypeError"

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class StandardError(Exception):

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    name = "StandardError"

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class LookupError(StandardError):

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    name = "LookupError"

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    def toString(self):

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        return self.name + ": " + self.args[0]

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class KeyError(LookupError):

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    name = "KeyError"

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class AttributeError(StandardError):

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    name = "AttributeError"

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    def toString(self):

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        return "AttributeError: %s of %s" % (self.args[1], self.args[0])

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JS("""

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pyjslib.StopIteration = function () { };

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pyjslib.StopIteration.prototype = new Error();

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pyjslib.StopIteration.name = 'StopIteration';

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pyjslib.StopIteration.message = 'StopIteration';

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pyjslib.String_find = function(sub, start, end) {

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    var pos=this.indexOf(sub, start);

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    if (pyjslib.isUndefined(end)) return pos;

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    if (pos + sub.length>end) return -1;

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    return pos;

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}

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pyjslib.String_join = function(data) {

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    var text="";

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    if (pyjslib.isArray(data)) {

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        return data.join(this);

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    }

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    else if (pyjslib.isIteratable(data)) {

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        var iter=data.__iter__();

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        try {

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            text+=iter.next();

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            while (true) {

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                var item=iter.next();

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                text+=this + item;

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            }

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        }

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        catch (e) {

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            if (e != pyjslib.StopIteration) throw e;

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        }

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    }

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    return text;

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}

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pyjslib.String_isdigit = function() {

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    return (this.match(/^\d+$/g) != null);

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}

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pyjslib.String_replace = function(old, replace, count) {

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    var do_max=false;

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    var start=0;

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    var new_str="";

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    var pos=0;

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    if (!pyjslib.isString(old)) return this.__replace(old, replace);

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    if (!pyjslib.isUndefined(count)) do_max=true;

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    while (start<this.length) {

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        if (do_max && !count--) break;

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        pos=this.indexOf(old, start);

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        if (pos<0) break;

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        new_str+=this.substring(start, pos) + replace;

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        start=pos+old.length;

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    }

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    if (start<this.length) new_str+=this.substring(start);

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    return new_str;

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}

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pyjslib.String_split = function(sep, maxsplit) {

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    var items=new pyjslib.List();

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    var do_max=false;

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    var subject=this;

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    var start=0;

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    var pos=0;

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    if (pyjslib.isUndefined(sep) || pyjslib.isNull(sep)) {

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        sep=" ";

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        subject=subject.strip();

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        subject=subject.replace(/\s+/g, sep);

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    }

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    else if (!pyjslib.isUndefined(maxsplit)) do_max=true;

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    if (subject.length == 0) {

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        return items;

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    }

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    while (start<subject.length) {

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        if (do_max && !maxsplit--) break;

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        pos=subject.indexOf(sep, start);

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        if (pos<0) break;

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        items.append(subject.substring(start, pos));

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        start=pos+sep.length;

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    }

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    if (start<=subject.length) items.append(subject.substring(start));

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    return items;

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}

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pyjslib.String___iter__ = function() {

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    var i = 0;

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    var s = this;

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    return {

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        'next': function() {

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            if (i >= s.length) {

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                throw pyjslib.StopIteration;

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            }

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            return s.substring(i++, i, 1);

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        },

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        '__iter__': function() {

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            return this;

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        }

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    };

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}

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pyjslib.String_strip = function(chars) {

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    return this.lstrip(chars).rstrip(chars);

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}

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pyjslib.String_lstrip = function(chars) {

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    if (pyjslib.isUndefined(chars)) return this.replace(/^\s+/, "");

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    return this.replace(new RegExp("^[" + chars + "]+"), "");

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}

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pyjslib.String_rstrip = function(chars) {

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    if (pyjslib.isUndefined(chars)) return this.replace(/\s+$/, "");

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    return this.replace(new RegExp("[" + chars + "]+$"), "");

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}

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pyjslib.String_startswith = function(prefix, start) {

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    if (pyjslib.isUndefined(start)) start = 0;

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    if (this.substring(start, prefix.length) == prefix) return true;

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    return false;

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}

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pyjslib.abs = Math.abs;

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""")

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class Class:

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    def __init__(self, name):

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        self.name = name

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    def __str___(self):

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        return self.name

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def eq(a, b):

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    JS("""

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    if (pyjslib.hasattr(a, "__cmp__")) {

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        return a.__cmp__(b) == 0;

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    } else if (pyjslib.hasattr(b, "__cmp__")) {

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        return b.__cmp__(a) == 0;

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    }

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    return a == b;

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    """)

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def cmp(a, b):

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    if hasattr(a, "__cmp__"):

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        return a.__cmp__(b)

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    elif hasattr(b, "__cmp__"):

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        return -b.__cmp__(a)

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    if a > b:

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        return 1

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    elif b > a:

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        return -1

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    else:

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        return 0

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def bool(v):

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    # this needs to stay in native code without any dependencies here,

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    # because this is used by if and while, we need to prevent

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    # recursion

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    JS("""

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    if (!v) return false;

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    switch(typeof v){

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    case 'boolean':

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        return v;

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    case 'object':

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        if (v.__nonzero__){

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            return v.__nonzero__();

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        }else if (v.__len__){

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            return v.__len__()>0;

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        }

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        return true;

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    }

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    return Boolean(v);

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    """)

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class List:

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    def __init__(self, data=None):

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        JS("""

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        this.l = [];

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        this.extend(data);

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        """)

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    def append(self, item):

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        JS("""    this.l[this.l.length] = item;""")

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    def extend(self, data):

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        JS("""

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        if (pyjslib.isArray(data)) {

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            n = this.l.length;

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            for (var i=0; i < data.length; i++) {

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                this.l[n+i]=data[i];

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                }

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            }

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        else if (pyjslib.isIteratable(data)) {

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            var iter=data.__iter__();

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            var i=this.l.length;

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            try {

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                while (true) {

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                    var item=iter.next();

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                    this.l[i++]=item;

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                    }

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                }

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            catch (e) {

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                if (e != pyjslib.StopIteration) throw e;

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                }

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            }

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        """)

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    def remove(self, value):

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        JS("""

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        var index=this.index(value);

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        if (index<0) return false;

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        this.l.splice(index, 1);

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        return true;

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        """)

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    def index(self, value, start=0):

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        JS("""

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        var length=this.l.length;

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