// server/plugins/initConfig.ts - 服务启动时检查 system_config 表，补全缺失的默认配置
// 只在首次部署或新增配置项时写入，不覆盖已有值；不读取环境变量
import { prisma } from "~~/server/utils/db";

// 所有系统配置的默认值，key 对应 system_config.key
// 管理员后续通过后台修改 value；openai_api_key 默认留空，需手动填入
const DEFAULT_CONFIGS = [
  {
    key: "openai_api_key",
    value: "",
    description: "OpenAI 或兼容 API Key，仅服务端使用，不能返回给前端"
  },
  {
    key: "openai_api_base",
    value: "https://api.openai.com/v1",
    description: "OpenAI 兼容 API base URL，例如 https://api.openai.com/v1"
  },
  {
    key: "openai_model",
    value: "gpt-5.2",
    description: "Chat Completions 使用的模型名"
  },
  {
    key: "max_tokens",
    value: "500",
    description: "单次回答最大 token 数"
  },
  {
    key: "temperature",
    value: "0.7",
    description: "模型采样温度，越低越稳定，范围 0~2"
  },
  {
    key: "openai_stream_max_sse_line_bytes",
    value: "1048576",
    description: "单行 SSE data 最大字节数，防止异常流无限堆内存"
  }
];

export default defineNitroPlugin(async () => {
  try {
    const existingRows = await prisma.systemConfig.findMany({
      select: { key: true }
    });
    const existingKeys = new Set(existingRows.map((r) => r.key));

    const missing = DEFAULT_CONFIGS.filter((c) => !existingKeys.has(c.key));
    if (missing.length === 0) return;

    await prisma.systemConfig.createMany({
      data: missing,
      skipDuplicates: true
    });
    console.log(
      `[initConfig] 已写入 ${missing.length} 项默认系统配置：${missing.map((c) => c.key).join(", ")}`
    );
  } catch (err) {
    // 初始化失败不阻断进程启动，记录警告供排查
    console.error("[initConfig] 系统配置初始化失败：", String(err));
  }
});