package com.trafficaudit.rulemanage.controller;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.trafficaudit.common.Result;
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import com.trafficaudit.rulemanage.entity.AuditRule;
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import com.trafficaudit.rulemanage.mapper.AuditRuleMapper;
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import org.springframework.web.bind.annotation.*;
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import javax.annotation.Resource;
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import java.time.LocalDateTime;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import java.util.List;
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/** 规则管理：按报表类型查看/启停/调整阈值 */
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@RestController
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@RequestMapping("/api/rules")
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public class RuleManageController {
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@Resource
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private AuditRuleMapper ruleMapper;
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/** 规则列表，可按报表类型过滤 */
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@GetMapping("/list")
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public Result<List<AuditRule>> list(@RequestParam(value = "reportType", required = false) String reportType) {
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LambdaQueryWrapper<AuditRule> qw = new LambdaQueryWrapper<>();
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if (reportType != null && !reportType.trim().isEmpty()) {
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qw.eq(AuditRule::getReportType, reportType.trim());
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}
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qw.orderByAsc(AuditRule::getSortOrder);
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List<AuditRule> list = ruleMapper.selectList(qw);
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for (AuditRule r : list) syncThresholdText(r); // 名称/说明随阈值动态展示（如 ±10% → ±20%）
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return Result.ok(list);
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}
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/** 启停规则 */
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@PostMapping("/toggle")
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public Result<String> toggle(@RequestParam("id") Long id,
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@RequestParam("enabled") Integer enabled) {
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AuditRule rule = ruleMapper.selectById(id);
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if (rule == null) return Result.error("规则不存在");
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rule.setIsEnabled(enabled == null || enabled == 0 ? 0 : 1);
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rule.setUpdatedAt(LocalDateTime.now());
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ruleMapper.updateById(rule);
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return Result.ok("已更新");
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}
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/** 更新阈值/等级/描述 */
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@PostMapping("/update")
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public Result<String> update(@RequestBody AuditRule body) {
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if (body.getId() == null) return Result.error("缺少规则ID");
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AuditRule rule = ruleMapper.selectById(body.getId());
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if (rule == null) return Result.error("规则不存在");
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String oldThreshold = rule.getThreshold();
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if (body.getThreshold() != null) rule.setThreshold(body.getThreshold());
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if (body.getAlertLevel() != null) rule.setAlertLevel(body.getAlertLevel());
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if (body.getDescription() != null) rule.setDescription(body.getDescription());
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// 阈值变化时同步规则名称与说明（名称/说明里与旧阈值对应的 N% 片段按新阈值改写），并随保存持久化
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if (body.getThreshold() != null && !body.getThreshold().equals(oldThreshold)) {
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syncThresholdText(rule, oldThreshold);
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}
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rule.setUpdatedAt(LocalDateTime.now());
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ruleMapper.updateById(rule);
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return Result.ok("已保存");
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}
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/** % 前的数值（名称/说明中随阈值动态变化的片段；% 前可能是 ±、>、超过、高出 等描述词，仅替换数字本身） */
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private static final Pattern PCT_NUM = Pattern.compile("\\d+(?:\\.\\d+)?(?=%)");
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/** 解析阈值字符串中第一个数值；无法解析返回 null */
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private Double parseThresholdNum(String threshold) {
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if (threshold == null || threshold.trim().isEmpty()) return null;
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java.util.regex.Matcher m = Pattern.compile("\\d+(?:\\.\\d+)?").matcher(threshold.trim());
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if (!m.find()) return null;
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try {
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return Double.parseDouble(m.group());
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} catch (Exception e) {
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return null;
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}
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}
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/** 数值展示：整数去掉小数位，其余保留原精度 */
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private String fmtNum(double v) {
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long l = Math.round(v);
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if (Math.abs(v - l) < 1e-9) return Long.toString(l);
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return new java.math.BigDecimal(String.valueOf(v)).stripTrailingZeros().toPlainString();
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}
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/** 由阈值数值推导“说明文字里写的是百分之几”的候选口径：
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* ① 阈值本身就是百分数（如 20 → ±20%）；
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* ② 阈值是小数比例（如 0.02 → 2%、0.5 → 50%）；此时 <1 才启用；
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* ③ 阈值是比值（如 1.3 → 高出30%）；此时 >1 才启用。 */
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private double[] thresholdPercentCandidates(double v) {
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double[] cands;
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if (v > 0 && v < 1) {
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cands = new double[]{v, v * 100};
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} else if (v > 1) {
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cands = new double[]{v, (v - 1) * 100};
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} else {
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cands = new double[]{v};
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}
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return cands;
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}
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/** 按旧阈值匹配文本中已有的百分比片段，仅替换“与旧阈值对得上”的数字为新阈值对应数字；对不上的数字（如说明里与阈值无关的数值）保持不动 */
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private String decorateThresholdText(String text, String oldThreshold, String newThreshold) {
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if (text == null || text.trim().isEmpty()) return text;
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Double oldNum = parseThresholdNum(oldThreshold);
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Double newNum = parseThresholdNum(newThreshold);
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if (oldNum == null || newNum == null) return text;
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double[] oldCands = thresholdPercentCandidates(oldNum);
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double[] newCands = thresholdPercentCandidates(newNum);
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if (oldCands.length != newCands.length) return text;
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java.util.regex.Matcher m = PCT_NUM.matcher(text);
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StringBuffer sb = new StringBuffer();
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while (m.find()) {
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double token;
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try {
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token = Double.parseDouble(m.group());
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} catch (Exception e) {
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continue;
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}
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String repl = null;
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for (int i = 0; i < oldCands.length; i++) {
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if (Math.abs(oldCands[i] - token) < 1e-9) {
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repl = fmtNum(newCands[i]);
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break;
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}
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}
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if (repl == null) continue;
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m.appendReplacement(sb, Matcher.quoteReplacement(repl));
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}
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m.appendTail(sb);
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return sb.toString();
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}
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/** 名称/说明随阈值同步（update 时按 旧→新 改写并持久化） */
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private void syncThresholdText(AuditRule rule, String oldThreshold) {
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if (rule == null || rule.getThreshold() == null) return;
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rule.setRuleName(decorateThresholdText(rule.getRuleName(), oldThreshold, rule.getThreshold()));
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rule.setDescription(decorateThresholdText(rule.getDescription(), oldThreshold, rule.getThreshold()));
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}
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/** 读列表时自愈：仅当文本片段与当前阈值对应时才改写（幂等，不误伤与阈值无关的数字） */
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private void syncThresholdText(AuditRule rule) {
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syncThresholdText(rule, rule == null ? null : rule.getThreshold());
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}
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}
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