import json
from fuzzywuzzy import fuzz
from config import keyword_mapping_path


class Comprehensive_Score():
    def __init__(self, dev_mode):
        with open(keyword_mapping_path, 'r', encoding="utf8", errors="ignore") as f:
            keyword_mapping = json.load(f)
        # 根据ksy和fxb判断值的次方
        self.power = 2 if dev_mode == "ksy" else 1
        self.knowledge2id = keyword_mapping["knowledge2id"]
        self.quantity2id = keyword_mapping["quantity2id"]
        self.init_id2max_id = keyword_mapping["init_id2max_id"]

    def __call__(self, query, refer, scale):
        score_dict = dict()
        quesType = self.compute_quesType(query["quesType"], refer["quesType"]["quesType"])
        knowledge = self.compute_knowledge(query["knowledge"], refer["knowledge"])
        solving_type = self.compute_solving_type(query["solving_type"], refer["solving_type"])
        difficulty = self.compute_difficulty(query["difficulty"], refer["difficulty"])
        physical_quantity = self.compute_physical_quantity(query["physical_quantity"], refer["physical_quantity"])

        sum_score = quesType * scale["quesType"] + knowledge * scale["knowledge"] + \
                    solving_type * scale["solving_type"] + difficulty * scale["difficulty"] + \
                    physical_quantity * scale["physical_quantity"]
        sum_score = int(sum_score * 100) / 100
        sum_score = min(sum_score, 1.0)

        score_dict["quesType"] = quesType
        score_dict["knowledge"] = knowledge
        score_dict["solving_type"] = solving_type
        score_dict["difficulty"] = difficulty
        score_dict["physical_quantity"] = physical_quantity

        return sum_score, score_dict

    # 知识点/物理场景/物理量相互关联得分计算
    def compute_relate_score(self, query_list, refer_list, keyword2id, mode):
        query_set, refer_set = set(query_list), set(refer_list)
        if query_set == refer_set:
            return 1.0
        if len(query_set) > len(refer_set):
            query_set, refer_set = refer_set, query_set
        accumulate_score = 0
        max_length = len(refer_set)
        # 双层循环计算知识点之间关联得分
        for query in query_set:
            query_score = 0
            query_id = keyword2id.get(query, 0)
            for refer in refer_set:
                refer_id = keyword2id.get(refer, 0)
                if query_id == refer_id:
                    query_score += 1
                    continue
                # 知识点
                if mode == 1:
                    if abs(query_id - refer_id) < 10 ** self.power: query_score += 0.3
                    elif abs(query_id - refer_id) < 100 ** self.power: query_score += 0.2
                    else: continue
                elif mode == 2:
                    if abs(query_id - refer_id) < 100: query_score += 0.2
                    else: continue
                fuzz_score = fuzz.ratio(query, refer)
                if mode == 1 and fuzz_score >= 0.4:
                    query_score += 0.1
            # refer长度为1特殊处理
            if max_length == 1:
                return query_score
            # 限定关联得分上限
            max_score = 1 / max_length + 1 if query in refer_set else (max_length - 1) / max_length
            if query_score > max_score: 
                accumulate_score += max_score
            else: 
                accumulate_score += query_score

        return min(accumulate_score / max_length, 0.85)

    # 题型相似度评分
    def compute_quesType(self, query, refer):
        score = 0.0
        if query == refer:
            score = 1.0
        return score

    # 知识点相似度评分
    def compute_knowledge(self, query_list, refer_list):
        score = self.compute_relate_score(query_list, refer_list, self.knowledge2id, mode=1)
        return int(score * 100) / 100

    # 试题求解类型相似度评分
    def compute_solving_type(self, query_list, refer_list):
        query_set, refer_set = set(query_list), set(refer_list)
        if len(query_set) > len(refer_set):
            query_set, refer_set = refer_set, query_set
        same_count = sum([1 for ele in query_set if ele in refer_set])
        score = same_count / len(refer_set)
        return int(score * 100) / 100
        
    # 难度相似度评分
    def compute_difficulty(self, query, refer):
        score = 1 - abs(float(query) - float(refer))
        return int(score * 100) / 100

    # 物理量相似度评分
    def compute_physical_quantity(self, query_list, refer_list):
        score = self.compute_relate_score(query_list, refer_list, self.quantity2id, mode=2)
        return int(score * 100) / 100