// server/api/images/plaza.get.ts - 广场列表接口：分页返回所有用户已公开且已归档成功的生图作品。
import type { IPlazaPostListData } from "#shared/types/openai";
import {
  createApiLogger,
  createSuccessResponse,
  createUpstreamErrorResponse,
  listPlazaPosts,
  toSafeLogError
} from "~~/server/utils";

const DEFAULT_PAGE = 1;
const DEFAULT_PAGE_SIZE = 20;
const MAX_PAGE_SIZE = 50;

/**
 * GET /api/images/plaza
 *
 * 流程：
 * 1. 读取 page/size 查询参数，并限制最大 pageSize。
 * 2. 只返回公开、生成成功、未删除、且已有图床归档地址的记录。
 * 3. 返回广场展示字段，不返回上游响应、图床响应或内部错误详情。
 */
export default defineEventHandler(async (event) => {
  const logger = createApiLogger("images.plaza.list");
  logger.info("开始");

  try {
    const query = getQuery(event);
    const page = normalizePositiveInt(query.page, DEFAULT_PAGE);
    const pageSize = Math.min(
      normalizePositiveInt(query.size, DEFAULT_PAGE_SIZE),
      MAX_PAGE_SIZE
    );

    logger.info("查询参数", {
      page,
      pageSize
    });

    const result = await listPlazaPosts({
      page,
      pageSize
    });

    logger.done("成功", {
      page,
      pageSize,
      total: result.total,
      itemCount: result.items.length
    });

    return createSuccessResponse<IPlazaPostListData>(
      result,
      "获取广场图片成功"
    );
  } catch (error) {
    logger.error("失败", {
      error: toSafeLogError(error)
    });
    return createUpstreamErrorResponse(error, "获取广场图片失败");
  }
});

/** 将 query 参数归一化为正整数，非法值回退到默认值 */
const normalizePositiveInt = (
  value: unknown,
  fallbackValue: number
): number => {
  const rawValue = Array.isArray(value) ? value[0] : value;
  const numberValue = Number.parseInt(String(rawValue ?? ""), 10);

  return Number.isInteger(numberValue) && numberValue > 0
    ? numberValue
    : fallbackValue;
};