package com.ruoyi.satisfaction.service.strategy;
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import com.ruoyi.common.exception.ServiceException;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Component;
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import java.util.Collections;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeSet;
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/**
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* 满意度站点口径策略解析器。
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* <p>
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* 由 Spring 注入全部 {@link SatisfactionScoreStrategy} 实现，按站点标识选择；
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* 站点为空或未知时<b>回落到通用口径</b>并打 WARN（保证调用方永远不会因为
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* "传了个没见过的站点"而失败）。
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* <p>
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* 用法：
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* <pre>
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* BigDecimal score = resolver.resolve(SatisfactionSites.SLTD).comprehensiveScore(rows);
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* </pre>
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* 以后新增站点：只加一个 {@code SatisfactionScoreStrategy} 实现类即可，本类无需改动。
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*/
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@Slf4j
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@Component
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public class SatisfactionScoreStrategyResolver {
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private final Map<String, SatisfactionScoreStrategy> strategies;
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private final SatisfactionScoreStrategy fallback;
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public SatisfactionScoreStrategyResolver(List<SatisfactionScoreStrategy> strategyList) {
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Map<String, SatisfactionScoreStrategy> map = new LinkedHashMap<>();
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if (strategyList != null) {
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for (SatisfactionScoreStrategy strategy : strategyList) {
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map.put(SatisfactionSites.normalize(strategy.site()), strategy);
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}
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}
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this.strategies = Collections.unmodifiableMap(map);
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this.fallback = map.get(SatisfactionSites.COMMON);
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if (this.fallback == null) {
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// 只可能在配置错误时发生（通用口径实现被误删），尽早暴露
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throw new ServiceException("满意度模块缺少通用口径策略实现（site=" + SatisfactionSites.COMMON + "）");
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}
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}
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/**
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* 按站点取策略；未知站点回落到通用口径并打 WARN
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*
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* @param site 站点标识（{@link SatisfactionSites} 中的常量，或其别名）
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*/
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public SatisfactionScoreStrategy resolve(String site) {
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String key = SatisfactionSites.normalize(site);
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SatisfactionScoreStrategy strategy = strategies.get(key);
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if (strategy == null) {
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log.warn("【满意度】未找到站点口径策略 site={}，回落到通用口径（{}）", site, SatisfactionSites.COMMON);
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return fallback;
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}
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return strategy;
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}
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/**
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* 已注册的站点标识（供校验/文档使用）
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*/
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public Set<String> supportedSites() {
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return Collections.unmodifiableSet(new TreeSet<>(strategies.keySet()));
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}
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}
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