Standardize KBO team codes and improve API parameter validation.

- KBO API 요청 매개변수에 `TeamCode` enum을 적용하여 타입 안정성을 강화하고 서비스 레이어의 불필요한 매핑 로직을 제거했습니다.
- `TEAM_CODES` 상수를 내부 데이터 정규화용 어댑터로 한정하여 외부 API 의존성을 줄였습니다.
- 핸들러 단계에서 유효한 팀 코드인지 검증하는 로직을 추가하여 잘못된 요청에 대한 에러 처리를 강화했습니다.
- `getPlayerStats` 함수의 인자 전달 방식을 객체 형태로 리팩토링하여 가독성과 유지보수성을 높였습니다.

src/handlers/kboHandlers.ts

@@ -4,7 +4,7 @@ import { getSchedule } from "../services/scheduleService.js";
 import { getPlayerStats, getValidPlayerTypes } from "../services/playerService.js";
 import { getGameList } from "../services/gameListService.js";
 import { getGameDetail } from "../services/gameDetailService.js";
-import type { PlayerFilters } from "../types/kbo.js";
+import { TeamCode } from "../types/panit.js";
 
 enum KboPath {
   Rank = "rank",
@@ -59,7 +59,6 @@ export const kbo = onRequest(async (req, res) => {
       const now = new Date();
       const year = parseIntParam(req.query.year, now.getFullYear());
       const month = parseIntParam(req.query.month, now.getMonth() + 1);
-      const team = req.query.team ? String(req.query.team) : undefined;
       const series = req.query.series ? String(req.query.series) : undefined;
       const day = req.query.day !== undefined
         ? parseIntParam(req.query.day, NaN)
@@ -78,6 +77,19 @@ export const kbo = onRequest(async (req, res) => {
         return;
       }
 
+      let team: TeamCode | undefined;
+      if (req.query.team) {
+        const raw = String(req.query.team);
+        const validCodes = Object.values(TeamCode) as string[];
+        if (!validCodes.includes(raw)) {
+          res.status(400).json({
+            error: `Invalid team: "${raw}". Use: ${validCodes.join(", ")}`,
+          });
+          return;
+        }
+        team = raw as TeamCode;
+      }
+
       const result = await getSchedule(year, month, team, series, day);
       res.status(200).json(result);
       return;
@@ -141,16 +153,30 @@ export const kbo = onRequest(async (req, res) => {
         return;
       }
 
-      const filters: PlayerFilters = {};
-      if (req.query.team) filters.team = String(req.query.team);
-      if (req.query.series) filters.series = String(req.query.series);
-      if (req.query.pos) filters.pos = String(req.query.pos);
-      if (req.query.situation) filters.situation = String(req.query.situation);
-      if (req.query.situationDetail) {
-        filters.situationDetail = String(req.query.situationDetail);
+      let team: TeamCode | undefined;
+      if (req.query.team) {
+        const raw = String(req.query.team);
+        const validCodes = Object.values(TeamCode) as string[];
+        if (!validCodes.includes(raw)) {
+          res.status(400).json({
+            error: `Invalid team: "${raw}". Use: ${validCodes.join(", ")}`,
+          });
+          return;
+        }
+        team = raw as TeamCode;
       }
 
-      const result = await getPlayerStats(type, year, filters, allPages);
+      const result = await getPlayerStats({
+        type,
+        year,
+        team,
+        series: req.query.series ? String(req.query.series) : undefined,
+        pos: req.query.pos ? String(req.query.pos) : undefined,
+        situation: req.query.situation ? String(req.query.situation) : undefined,
+        situationDetail: req.query.situationDetail ?
+          String(req.query.situationDetail) : undefined,
+        allPages,
+      });
       res.status(200).json(result);
       return;
     }

src/kbo/player/common.ts

@@ -82,10 +82,24 @@ export interface PlayerStatsResult {
 }
 
 /**
- * KBO 팀 코드 매핑.
+ * 팀 표기명(shortName/한글) → KBO 사이트 코드 매핑.
  *
  * KBO 사이트의 팀 드롭다운은 현재 팀명이 아닌 구단 역사상의 코드를 value로 사용한다.
  * 예: SSG는 SK 시절 코드 "SK", 키움은 우리 히어로즈 시절 코드 "WO" 등.
+ *
+ * ## 존재 이유
+ * 외부 API의 `team` 파라미터는 `TeamCode` enum으로 받기 때문에 요청 단계에서는
+ * 더 이상 매핑이 필요 없다 (TeamCode 값이 곧 KBO 사이트 코드와 동일).
+ *
+ * 그럼에도 이 맵이 필요한 곳:
+ * 1. 응답 파싱 — `kbo/schedule.ts`의 `toTeamCode()`가 스크래핑된 HTML 속
+ *    한국어 팀명("두산", "한화" 등)을 응답의 `awayTeamCode`/`homeTeamCode`
+ *    필드용 코드로 정규화할 때 사용한다.
+ * 2. CLI 입력 편의 — `kbo/cli.ts`에서 사람이 직접 입력하는 한글/shortName을
+ *    KBO 코드로 변환할 때 사용한다.
+ *
+ * 즉 이 맵은 "사람이 읽는 표기 → KBO 내부 코드" 어댑터이며,
+ * 서비스 레이어의 외부 API 매개변수에는 더 이상 사용하지 않는다.
  */
 export const TEAM_CODES: Record<string, string> = {
   KT: "KT",

src/services/playerService.ts

@@ -1,6 +1,6 @@
 import { fetchPlayerFromKbo } from "../repositories/kboRepository.js";
-import { TEAM_CODES } from "../types/kbo.js";
 import type { PlayerFilters, PlayerPageConfig, PlayerStatsResult } from "../types/kbo.js";
+import { TeamCode } from "../types/panit.js";
 import { HITTER_CONFIG } from "../kbo/player/hitter.js";
 import { PITCHER_CONFIG } from "../kbo/player/pitcher.js";
 import { DEFENSE_CONFIG } from "../kbo/player/defense.js";
@@ -21,12 +21,22 @@ export function getValidPlayerTypes(): string[] {
   return Object.keys(PLAYER_CONFIGS);
 }
 
+export interface GetPlayerStatsArgs {
+  type: string;
+  year: number;
+  team?: TeamCode;
+  series?: string;
+  pos?: string;
+  situation?: string;
+  situationDetail?: string;
+  allPages: boolean;
+}
+
 export async function getPlayerStats(
-  type: string,
-  year: number,
-  filters: PlayerFilters,
-  allPages: boolean
+  args: GetPlayerStatsArgs
 ): Promise<PlayerStatsResult> {
+  const { type, year, team, series, pos, situation, situationDetail, allPages } = args;
+
   const config = PLAYER_CONFIGS[type];
   if (!config) {
     throw new Error(
@@ -34,10 +44,12 @@ export async function getPlayerStats(
     );
   }
 
-  const resolvedFilters = { ...filters };
-  if (resolvedFilters.team) {
-    resolvedFilters.team = TEAM_CODES[resolvedFilters.team] ?? resolvedFilters.team;
-  }
+  const filters: PlayerFilters = {};
+  if (team) filters.team = team;
+  if (series) filters.series = series;
+  if (pos) filters.pos = pos;
+  if (situation) filters.situation = situation;
+  if (situationDetail) filters.situationDetail = situationDetail;
 
-  return fetchPlayerFromKbo(type, config, year, resolvedFilters, allPages);
-}
+  return fetchPlayerFromKbo(type, config, year, filters, allPages);
+}

src/services/scheduleService.ts

@@ -1,15 +1,15 @@
 import { fetchScheduleFromKbo } from "../repositories/kboRepository.js";
-import { TEAM_CODES, SERIES_CODES } from "../types/kbo.js";
+import { SERIES_CODES } from "../types/kbo.js";
 import type { ScheduleResult } from "../types/kbo.js";
+import type { TeamCode } from "../types/panit.js";
 
 export async function getSchedule(
   year: number,
   month: number,
-  team?: string,
+  team?: TeamCode,
   series?: string,
   day?: number
 ): Promise<ScheduleResult> {
-  const resolvedTeam = team ? (TEAM_CODES[team] ?? team) : undefined;
   const resolvedSeries = series ? (SERIES_CODES[series] ?? series) : undefined;
 
   return fetchScheduleFromKbo({
@@ -17,6 +17,6 @@ export async function getSchedule(
     month,
     day,
     series: resolvedSeries,
-    team: resolvedTeam,
+    team,
   });
-}
+}

src/types/kbo.ts

@@ -22,7 +22,6 @@ export type {
   PlayerStatsResult,
 } from "../kbo/player/common.js";
 
-export { TEAM_CODES } from "../kbo/player/common.js";
 export { SERIES_CODES } from "../kbo/schedule.js";
 
 export type {