import json
import os
import random
import Config

class Quest:
    def __init__(self, json_obj):
        self.index = json_obj['index']
        self.question = json_obj['Q']
        self.code = json_obj['I']
        self.correct = json_obj['A']
        self.options = [json_obj['A'], json_obj['B'], json_obj['C'], json_obj['D']]
        self.random_options = random.sample(self.options, len(self.options))

weight_path = 'weight.dat'

def enhance_weight(quest: Quest):
    with open(weight_path, 'r') as f:
        weight = json.load(f)
    if quest.code in weight:
        weight[quest.code] += 10
    else:
        weight[quest.code] = 10
    with open(weight_path, 'w') as f:
        json.dump(weight, f, ensure_ascii=False, indent=4)
    pass

def reduce_weight(quest: Quest):
    with open(weight_path, 'r') as f:
        weight = json.load(f)
    if quest.code in weight:
        weight[quest.code] -= 1
    else:
        weight[quest.code] = -1
    with open(weight_path, 'w') as f:
        json.dump(weight, f, ensure_ascii=False, indent=4)
    pass

# 模拟加载题目
def generate_quests(type_str):
    # 模拟从JSON文件加载题目
    with open(f'quests/quests_{type_str}.json', 'r', encoding='utf-8') as f:
        json_content = json.load(f)
    list_quest = [Quest(obj) for obj in json_content]
    # load weight
    weights = {}
    if not os.path.exists(weight_path):
        with open(weight_path, 'w') as f:
            json.dump({}, f)
    else:
        with open(weight_path, 'r') as f:
            weights = json.load(f)
    # 将 list_quest 分为有权重和无权重的两部分
    list_quest_weighted = [quest for quest in list_quest if quest.code in weights]
    list_quest_unweighted = [quest for quest in list_quest if quest.code not in weights]
    # 有权中的按权重排序
    list_quest_weighted.sort(key=lambda x: weights[x.code], reverse=True)
    list_quest = list_quest_unweighted + list_quest_weighted
    num = Config.quest_config[type_str]['num'] # 要生成的题目数量
    top = int(num * 0.4)
    quests = random.sample(list_quest[:top], top) + random.sample(list_quest[top:], num - top)
    # 对 quests 中的题目再次随机排序
    random.shuffle(quests)
    return quests