import { onRequest } from "firebase-functions/https";
import { requireAuthToken } from "../middleware/auth";
import { sendError } from "../middleware/errors";
import {
  checkNickname,
  createMe,
  deleteMe,
  getMe,
  updateMe,
  updateNotifications,
} from "../services/userService";
import type {
  MeResponseDto,
  NotificationsResponseDto,
  UserProfileDto,
} from "../types/dto/userDto";

/** `uid` + 프로필 DTO를 `MeResponseDto`로 조립한다. 필드를 하나하나 명시해 새 필드 누락을 방지한다. */
function toMeResponse(uid: string, profile: UserProfileDto): MeResponseDto {
  return {
    user: {
      uid,
      displayName: profile.displayName,
      email: profile.email,
      photoUrl: profile.photoUrl,
      provider: profile.provider,
      favoriteTeamCode: profile.favoriteTeamCode,
      knowledgeLevel: profile.knowledgeLevel,
      createdAt: profile.createdAt,
      lastJudgedDate: profile.lastJudgedDate,
    },
  };
}

export const user = onRequest(async (req, res) => {
  try {
    if (req.method === "GET" && req.path === "/check-nickname") {
      const token = await requireAuthToken(req);
      const result = await checkNickname(token, req.query.displayName);
      res.status(200).json(result);
      return;
    }
    if (req.method === "GET" && req.path === "/") {
      const token = await requireAuthToken(req);
      const u = await getMe(token);
      res.status(200).json(toMeResponse(token.uid, u));
      return;
    }
    if (req.method === "POST" && req.path === "/") {
      const token = await requireAuthToken(req);
      const u = await createMe(token, req.body ?? {});
      res.status(201).json(toMeResponse(token.uid, u));
      return;
    }
    if (req.method === "PATCH" && req.path === "/") {
      const token = await requireAuthToken(req);
      const u = await updateMe(token, req.body ?? {});
      res.status(200).json(toMeResponse(token.uid, u));
      return;
    }
    if (req.method === "PATCH" && req.path === "/notifications") {
      const token = await requireAuthToken(req);
      const notifications = await updateNotifications(token, req.body ?? {});
      const body: NotificationsResponseDto = { notifications };
      res.status(200).json(body);
      return;
    }
    if (req.method === "DELETE" && req.path === "/") {
      const token = await requireAuthToken(req);
      await deleteMe(token);
      res.status(204).send();
      return;
    }
    res.status(404).json({ error: "not found" });
  } catch (err) {
    sendError(res, err);
  }
});