python early hide:
    import inspect
    __register_params = frozenset(inspect.signature(renpy.register_statement).parameters).difference({"name", "parse"})
    def register_decorator(cls):
        """
        A class decorator which registers a new statement.

        The name of the statement will be the class name unless a `name` class attribute is present, which should be a string.

        The `parse` method should be a static method that returns an object which will be passed to the other methods as `self`.
        Returning an instance of the class is disabled for now.
        """
        # security
        def raiser(*args, **kwargs):
            raise TypeError("Returning an instance of the class is disabled")
        cls.__init__ = raiser

        name = getattr(cls, "name", cls.__name__)
        parse = getattr(cls, "parse", cls) # left in
        renpy.register_statement(name,
            parse=parse,
            **{k:getattr(cls, k) for k in __register_params.intersection(vars(cls))})
        return cls

    @register_decorator
    class dynamic:
        block = "possible"

        @staticmethod
        def parse(l):
            rv = {}

            def parse_simple(ll):
                target = ll.require(ll.name, "variable name")
                if target in rv:
                    ll.error(f"Variable {target} already set in the same dynamic block")
                ll.require("=", "equals sign")
                expression = ll.simple_expression()
                ll.expect_eol()
                rv[target] = expression

            if l.match(":"):
                l.expect_block("dynamic block")
                l.expect_eol()
                ll = l.subblock_lexer()
                while ll.advance():
                    parse_simple(ll)
            else:
                parse_simple(l)

            return rv

        def execute(self):
            evaled = {n: eval(e) for n, e in self.items()}
            renpy.dynamic(**evaled)

    @register_decorator
    class chibi:
        @staticmethod
        def parse(l):
            who = l.simple_expression()
            action = l.simple_expression()

            return (who, action)

        def execute(self):
            print(f"{self}")
            who, action = self
            func = eval(f"{who}_chibi.{action}")

            # print(f"Execution: {who} {action}")

        def lint(self):
            who, action = self
            try:
                chibi = eval(f"{who}_chibi")
            except Exception:
                renpy.error(f"Character chibi not defined: {who}")

        def predict(self):
            who, action = self

            chibi = eval(f"{who}_chibi")
            doll = eval(f"{who}")

            layers = (
                l[0] for pose in chibi.poses.keys()
                for k in doll.states.values() if k[0] and k[2]
                for l in k[0].get_layers(k[0]._hash, subpath=posixpath.join("chibi", pose)).values()
            )

            return layers

    @register_decorator
    class random:
        block = True
        predict_all = True

        @staticmethod
        def parse(l):
            l.require(":")
            l.expect_eol()

            ll = l.subblock_lexer()
            blocks = []

            while ll.advance():
                with ll.catch_error():
                    weight = 1.0
                    condition = "True"

                    if ll.keyword("block"):
                        ll.expect_block("block")

                        block = ll.subblock_lexer().renpy_block()

                        if ll.keyword("weight"):
                            weight = float(ll.require(ll.float))

                        if ll.keyword("if"):
                            ll.expect_block("if block")
                            condition = ll.require(ll.python_expression)
                    else:
                        block = ll.renpy_statement()

                    blocks.append((block, weight, condition))

            return {"blocks": blocks}

        def next(self):
            blocks = [(block, weight) for block, weight, condition in self["blocks"] if eval(condition)]
            total_weight = sum(weight for _, weight in blocks)
            n = renpy.random.random() * total_weight

            for block, weight in blocks:
                if n <= weight:
                    break
                else:
                    n -= weight

            return block