class Cell(object):
    def __init__(self, parent, key, data, **kwargs):
        self.key = key
        self.parent = parent
        self.members = {}
        self.grid_args = {}
        self.config_args = {}

        self.row = None
        self.rowspan = None
        self.column = None
        self.columnspan = None

        self.padx = None
        self.pady = None
        self.ipadx = None
        self.ipady = None
        self.index = None

        self.type = data.get('type', None)
        self.label = data.get('label', None)
        self.style = data.get('style', None)
        self.width = data.get('width', None)
        self.height = data.get('height', None)
        self.sticky = data.get('sticky', None)
        self.rowconfigure = data.get('rowconfigure', 0)
        self.columnconfigure = data.get('columnconfigure', 0)

        if self.type == 'LabelFrame':
            self.frame = LabelFrame(parent, text=self.label)
        else:
            self.frame = Frame(parent)

        self.frame.rowconfigure(self.rowconfigure, weight=1)
        self.frame.columnconfigure(self.columnconfigure, weight=1)
        self.frame.grid(sticky=self.sticky)

    def get(self, uri=None):
        if not uri:
            return self.frame

        uri = uri.replace('\\', '/').rstrip('/')
        if '/' in uri:
            def parse(parent, uri_part):
                parts = uri_part.split('/', 1)

                child = parent.get(parts[0])
                if len(parts) > 1:
                    child = parse(child, parts[1])

                return child

            return parse(self, uri)

        if isinstance(self.members.get(uri, None), Field):
            return self.members.get(uri).field

        return self.members.get(uri, None)

    def add(self, data):
        key = next(iter(data.keys()))
        item = next(iter(data.values()))
        item_type = item.get('type')

        if key not in self.members:
            if item_type == 'PanedWindow':
                self.members[key] = Pane(self.frame, key, item)
            elif item_type in ('Frame', 'LabelFrame'):
                self.members[key] = Group(self.frame, key, item)
            else:
                self.members[key] = Field(self.frame, key, item)

        return self.members[key]

    def item(self, uri=None):
        return self.get(uri)

    def remove(self, uri):
        if not uri:
            return self.frame

        uri = uri.replace('\\', '/').rstrip('/')
        if '/' in uri:
            def parse(parent, uri_part):
                parts = uri_part.split('/', 1)

                child = parent.get(parts[0])
                if len(parts) > 1:
                    child = parse(child, parts[1])

                return child

            return parse(self, uri)
        self.members[uri].grid_remove()

        del self.members[uri]

    def values(self, data=None):
        cache = URICache(data=data)

        def process(uri, members):

            for key, widget in members.items():
                if isinstance(widget, Field):
                    target = uri + '/' + key + '/value'
                    value = None if not data else cache.get(target, '')

                    if widget.type in ('Treeview', 'Progressbar', 'Button', 'Separator', 'Label'):
                        continue

                    if widget.type == 'Notebook':
                        for tab, page in widget.field.page.items():
                            if hasattr(page, 'form'):
                                process(uri + '/' + key + '/items/' + tab + '/content', page.form.members)

                    elif widget.type == 'Text':
                        if data:
                            if value is None:
                                value = ''
                            widget.field.text.delete('1.0', 'end')
                            widget.field.text.insert('end', value)
                        else:
                            cache.set(widget.field.text.get('1.0', 'end'), target)

                    elif widget.type == 'Combobox':
                        if data:
                            item = ''
                            if widget.items:
                                if isinstance(value, str):
                                    value = 0
                                item = widget.items[value]

                            widget.field.set(item)
                            if value:
                                widget.field.combobox.current(value)
                        else:
                            cache.set(widget.items.index(widget.field.var.get()), target)

                    else:
                        if data:
                            widget.field.set(value)
                        else:
                            cache.set(widget.field.var.get(), target)
                elif widget.type != 'PanedWindow':
                    process(uri + '/' + key, widget.members)
                else:
                    for k, v in widget.members.items():
                        process(uri + '/' + key + '/' + k, v.members)

        process(self.key, self.members)

        return cache.get()