import { Response } from "express";
import { CustomRequest } from "../interfaces/auth";
import { STATUS_CODES } from "../constants/statusCodes";
import { REPORT_CONSTANTS } from "../constants/messages";
import ResponseUtil from "../utils/Response/responseUtils";
import { createReportSchema } from "../validators/reportValidator";
import { createReport } from "../services/reportService";

function handleServiceError(res: Response, err: unknown): void {
  if (!(err instanceof Error)) {
    ResponseUtil.errorResponse(
      res,
      STATUS_CODES.INTERNAL_SERVER_ERROR,
      "An unexpected error occurred",
    );
    return;
  }

  switch (err.message) {
    case "CANNOT_SELF_REPORT":
      ResponseUtil.errorResponse(
        res,
        STATUS_CODES.BAD_REQUEST,
        REPORT_CONSTANTS.CANNOT_SELF_REPORT,
      );
      break;
    case "USER_NOT_FOUND":
      ResponseUtil.errorResponse(
        res,
        STATUS_CODES.NOT_FOUND,
        REPORT_CONSTANTS.USER_NOT_FOUND,
      );
      break;
    default:
      ResponseUtil.errorResponse(
        res,
        STATUS_CODES.INTERNAL_SERVER_ERROR,
        err.message,
      );
  }
}

/**
 * POST /api/v1/reports
 * Report another user with a free-text reason.
 */
export const createUserReport = async (req: CustomRequest, res: Response) => {
  try {
    const { userId, reason } = await createReportSchema.parseAsync(req.body);
    const result = await createReport(req.userId!, userId, reason);
    ResponseUtil.successResponse(
      res,
      STATUS_CODES.SUCCESS,
      result,
      REPORT_CONSTANTS.CREATED,
    );
  } catch (err) {
    if (
      err instanceof Error &&
      ["CANNOT_SELF_REPORT", "USER_NOT_FOUND"].includes(err.message)
    ) {
      handleServiceError(res, err);
    } else {
      ResponseUtil.handleError(res, err);
    }
  }
};