#! /usr/bin/python3
# -*- coding:utf-8 -*-

from src import random_selector
from src import main
from src import lottery
import functools
import importlib

_GLOBAL_FUNC_MAPS = {}
_GLOBAL_EXCLUDE_ROLE_LIST = set()


def exclude_users(users, exclude_roles):
    users[:] = [u for u in users if u['role'] not in exclude_roles]
    return users


def before_unbound_method(attr_name):
    def decorator(func):
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            result = func(*args, **kwargs)
            old_attr = _GLOBAL_FUNC_MAPS.get(attr_name)
            if callable(old_attr):
                return old_attr(*args, **kwargs)
            else:
                return result
        return wrapper
    return decorator


def after_unbound_method(attr_name):
    def decorator(func):
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            old_attr = _GLOBAL_FUNC_MAPS.get(attr_name)
            if callable(old_attr):
                result = old_attr(*args, **kwargs)
                func(*args, **kwargs)
            else:
                result = func(*args, **kwargs)
            return result
        return wrapper
    return decorator


def replace_unbound_method(ins, attr_name, value):
    old_attr = getattr(ins, attr_name)
    setattr(ins, attr_name, value)
    return old_attr


@before_unbound_method('randomselect')
def on_randomselect(elapsed_ms, items, select_num):
    exclude_users(items, _GLOBAL_EXCLUDE_ROLE_LIST)


@main.app.route('/exclude/<role:int>')
def exclude_role(role):
    _GLOBAL_EXCLUDE_ROLE_LIST.add(role)
    return lottery.server_resp(200, "success")


@main.app.route('/include/<role:int>')
def include_role(role):
    try:
        _GLOBAL_EXCLUDE_ROLE_LIST.remove(role)
    except KeyError:
        return lottery.server_resp(501, "找不到该角色id", {'role': role})
    else:
        return lottery.server_resp(200, "success")


@main.app.route('/show_exclude')
def show_exclude():
    return lottery.server_resp(200, "success", [r for r in _GLOBAL_EXCLUDE_ROLE_LIST])


def patch():
    _GLOBAL_FUNC_MAPS['randomselect'] = replace_unbound_method(importlib.reload(random_selector),
                                                               'randomselect', on_randomselect)


def run(host, port, debug):
    patch()
    main.run(host=host, port=port, debug=debug)


if __name__ == '__main__':
    run('0.0.0.0', 8080, False)