mesa/firm.py

from mesa import Agent


class FirmAgent(Agent):
    def __init__(self, unique_id, model, type_region, revenue_log, a_lst_product):
        # 调用超类的 __init__ 方法
        super().__init__(unique_id, model)

        # 初始化模型中的网络引用
        self.firm_network = self.model.firm_network
        self.product_network = self.model.product_network

        # 初始化代理自身的属性
        self.type_region = type_region

        self.size_stat = []
        self.dct_prod_up_prod_stat = {}
        self.dct_prod_capacity = {}

        # 试验中的参数
        self.dct_n_trial_up_prod_disrupted = {}
        self.dct_cand_alt_supp_up_prod_disrupted = {}
        self.dct_request_prod_from_firm = {}

        # 外部变量
        self.is_prf_size = self.model.is_prf_size
        self.is_prf_conn = bool(self.model.prf_conn)
        self.str_cap_limit_prob_type = str(self.model.cap_limit_prob_type)
        self.flt_cap_limit_level = float(self.model.cap_limit_level)
        self.flt_diff_new_conn = float(self.model.diff_new_conn)

        # 初始化 size_stat
        self.size_stat.append((revenue_log, 0))

        # 初始化 dct_prod_up_prod_stat
        for prod in a_lst_product:
            self.dct_prod_up_prod_stat[prod] = {
                'p_stat': [('N', 0)],
                's_stat': {up_prod: {'stat': True, 'set_disrupt_firm': set()}
                           for up_prod in prod.a_predecessors()}
            }

        # 初始化额外容量 (dct_prod_capacity)
        for product in a_lst_product:
            assert self.str_cap_limit_prob_type in ['uniform', 'normal'], \
                "cap_limit_prob_type must be either 'uniform' or 'normal'"
            extra_cap_mean = self.size_stat[0][0] / self.flt_cap_limit_level
            if self.str_cap_limit_prob_type == 'uniform':
                extra_cap = self.model.random.uniform(extra_cap_mean - 2, extra_cap_mean + 2)
                extra_cap = 0 if round(extra_cap) < 0 else round(extra_cap)
            elif self.str_cap_limit_prob_type == 'normal':
                extra_cap = self.model.random.normalvariate(extra_cap_mean, 1)
                extra_cap = 0 if round(extra_cap) < 0 else round(extra_cap)
            self.dct_prod_capacity[product] = extra_cap

    def remove_edge_to_cus(self, disrupted_prod):
        # parameter disrupted_prod is the product that self got disrupted
        lst_out_edge = list(
            self.firm_network.out_edges(
                self.unique_id, keys=True, data='Product'))
        for n1, n2, key, product_code in lst_out_edge:
            if product_code == disrupted_prod.unique_id:
                # update customer up product supplier status
                customer = next(agent for agent in self.model.company_agents if agent.unique_id == n2)

                for prod in customer.dct_prod_up_prod_stat.keys():
                    if disrupted_prod in customer.dct_prod_up_prod_stat[prod]['s_stat'].keys():
                        customer.dct_prod_up_prod_stat[prod]['s_stat'][disrupted_prod][
                            'set_disrupt_firm'].add(self)
                        # print(f"{self.name} disrupt {customer.name}'s "
                        #       f"{prod.code} due to {disrupted_prod.code}")
                # remove edge to customer
                self.firm_network.remove_edge(n1, n2, key)

    def disrupt_cus_prod(self, prod, disrupted_up_prod):
        # parameter prod is the product that has disrupted_up_prod
        # parameter disrupted_up_prod is the product that
        # self's component exists disrupted supplier
        num_lost = \
            len(self.dct_prod_up_prod_stat[prod]['s_stat']
                [disrupted_up_prod]['set_disrupt_firm'])
        num_remain = \
            len([u for u, _, _, d in
                 self.firm_network.in_edges(self.get_firm_network_unique_id(),
                                            keys=True,
                                            data='Product')
                 if d == disrupted_up_prod.unique_id])
        lost_percent = num_lost / (num_lost + num_remain)
        lst_size = \
            [firm.size_stat[-1][0] for firm in self.model.company_agents]
        std_size = (self.size_stat[-1][0] - min(lst_size) + 1) \
                   / (max(lst_size) - min(lst_size) + 1)

        # calculate probability of disruption
        prob_disrupt = 1 - std_size * (1 - lost_percent)
        if self.model.nprandom.choice([True, False],
                                      p=[prob_disrupt,
                                         1 - prob_disrupt]):
            self.dct_n_trial_up_prod_disrupted[disrupted_up_prod] = 0
            self.dct_prod_up_prod_stat[
                prod]['s_stat'][disrupted_up_prod]['stat'] = False
            status, _ = self.dct_prod_up_prod_stat[
                prod]['p_stat'][-1]
            if status != 'D':
                self.dct_prod_up_prod_stat[
                    prod]['p_stat'].append(('D', self.model.t))
                # print(f"{self.name}'s {prod.code} turn to D status due to "
                #       f"disrupted supplier of {disrupted_up_prod.code}")

    def seek_alt_supply(self, product):
        if self.dct_n_trial_up_prod_disrupted[product] <= self.model.int_n_max_trial:
            if self.dct_n_trial_up_prod_disrupted[product] == 0:
                self.dct_cand_alt_supp_up_prod_disrupted[product] = [
                    firm for firm in self.model.company_agents
                    if firm.is_prod_in_current_normal(product)]
            if self.dct_cand_alt_supp_up_prod_disrupted[product]:
                lst_firm_connect = []
                if self.is_prf_conn:
                    for firm in self.dct_cand_alt_supp_up_prod_disrupted[product]:
                        if self.firm_network.has_edge(self.unique_id, firm.unique_id) or \
                                self.firm_network.has_edge(firm.unique_id, self.unique_id):
                            lst_firm_connect.append(firm)
                if len(lst_firm_connect) == 0:
                    if self.is_prf_size:
                        lst_size = [firm.size_stat[-1][0] for firm in self.dct_cand_alt_supp_up_prod_disrupted[product]]
                        lst_prob = [size / sum(lst_size) for size in lst_size]
                        select_alt_supply = \
                            self.random.choices(self.dct_cand_alt_supp_up_prod_disrupted[product], weights=lst_prob)[0]
                    else:
                        select_alt_supply = self.random.choice(self.dct_cand_alt_supp_up_prod_disrupted[product])
                elif len(lst_firm_connect) > 0:
                    if self.is_prf_size:
                        lst_firm_size = [firm.size_stat[-1][0] for firm in lst_firm_connect]
                        lst_prob = [size / sum(lst_firm_size) for size in lst_firm_size]
                        select_alt_supply = self.random.choices(lst_firm_connect, weights=lst_prob)[0]
                    else:
                        select_alt_supply = self.random.choice(lst_firm_connect)

                assert select_alt_supply.is_prod_in_current_normal(product)

                if product in select_alt_supply.dct_request_prod_from_firm:
                    select_alt_supply.dct_request_prod_from_firm[product].append(self)
                else:
                    select_alt_supply.dct_request_prod_from_firm[product] = [self]

                self.dct_n_trial_up_prod_disrupted[product] += 1

    def handle_request(self):
        for product, lst_firm in self.dct_request_prod_from_firm.items():
            if self.dct_prod_capacity[product] > 0:
                if len(lst_firm) == 0:
                    continue
                elif len(lst_firm) == 1:
                    self.accept_request(lst_firm[0], product)
                elif len(lst_firm) > 1:
                    lst_firm_connect = []
                    if self.is_prf_conn:
                        for firm in lst_firm:
                            if self.firm_network.has_edge(self.unique_id, firm.unique_id) or \
                                    self.firm_network.has_edge(firm.unique_id, self.unique_id):
                                lst_firm_connect.append(firm)
                    if len(lst_firm_connect) == 0:
                        if self.is_prf_size:
                            lst_firm_size = [firm.size_stat[-1][0] for firm in lst_firm]
                            lst_prob = [size / sum(lst_firm_size) for size in lst_firm_size]
                            select_customer = self.random.choices(lst_firm, weights=lst_prob)[0]
                        else:
                            select_customer = self.random.choice(lst_firm)
                        self.accept_request(select_customer, product)
                    elif len(lst_firm_connect) > 0:
                        if self.is_prf_size:
                            lst_firm_size = [firm.size_stat[-1][0] for firm in lst_firm_connect]
                            lst_prob = [size / sum(lst_firm_size) for size in lst_firm_size]
                            select_customer = self.random.choices(lst_firm_connect, weights=lst_prob)[0]
                        else:
                            select_customer = self.random.choice(lst_firm_connect)
                        self.accept_request(select_customer, product)
            else:
                for down_firm in lst_firm:
                    down_firm.dct_cand_alt_supp_up_prod_disrupted[product].remove(self)

    def accept_request(self, down_firm, product):
        if self.firm_network.has_edge(self.unique_id, down_firm.unique_id) or \
                self.firm_network.has_edge(down_firm.unique_id, self.unique_id):
            prod_accept = 1.0
        else:
            prod_accept = self.flt_diff_new_conn
        if self.model.nprandom.choice([True, False], p=[prod_accept, 1 - prod_accept]):
            self.firm_network.add_edge(self.unique_id, down_firm.unique_id, Product=product.unique_id)
            self.dct_prod_capacity[product] -= 1
            self.dct_request_prod_from_firm[product].remove(down_firm)

            for prod in down_firm.dct_prod_up_prod_stat.keys():
                if product in down_firm.dct_prod_up_prod_stat[prod]['s_stat']:
                    down_firm.dct_prod_up_prod_stat[prod]['s_stat'][product]['stat'] = True
                    down_firm.dct_prod_up_prod_stat[prod]['p_stat'].append(
                        ('N', self.model.t))
            del down_firm.dct_n_trial_up_prod_disrupted[product]
            del down_firm.dct_cand_alt_supp_up_prod_disrupted[product]
        else:
            down_firm.dct_cand_alt_supp_up_prod_disrupted[product].remove(self)

    def clean_before_trial(self):
        self.dct_request_prod_from_firm = {}

    def clean_before_time_step(self):
        # Reset the number of trials and candidate suppliers for disrupted products
        self.dct_n_trial_up_prod_disrupted = dict.fromkeys(self.dct_n_trial_up_prod_disrupted.keys(), 0)
        self.dct_cand_alt_supp_up_prod_disrupted = {}

        # Update the status of products and refresh disruption sets
        for prod in self.dct_prod_up_prod_stat.keys():
            status, ts = self.dct_prod_up_prod_stat[prod]['p_stat'][-1]
            if ts != self.model.t:
                self.dct_prod_up_prod_stat[prod]['p_stat'].append((status, self.model.t))

            # Refresh the set of disrupted firms
            for up_prod in self.dct_prod_up_prod_stat[prod]['s_stat'].keys():
                self.dct_prod_up_prod_stat[prod]['s_stat'][up_prod]['set_disrupt_firm'] = set()

    def get_firm_network_unique_id(self):
        return self.unique_id

    def is_prod_in_current_normal(self, prod):
        if prod in self.dct_prod_up_prod_stat.keys():
            if self.dct_prod_up_prod_stat[prod]['p_stat'][-1][0] == 'N':
                return True
            else:
                return False
        else:
            return False