import { tool } from "@opencode-ai/plugin";

const internalBaseUrl = process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";

export default tool({
  description:
    "回读由 dynamic_http_call 生成的持久化 result_ref。适用于大结果只返回 preview 时，再按需读取完整或截断后的数据。",
  args: {
    reason: tool.schema
      .string()
      .describe("Why the stored result needs to be read for the current user request."),
    result_ref: tool.schema.string().describe("The result_ref returned by dynamic_http_call."),
    max_items: tool.schema
      .number()
      .int()
      .positive()
      .optional()
      .describe("Optional maximum number of top-level items or fields to return."),
  },
  async execute(args, context) {
    const response = await fetch(`${internalBaseUrl}/internal/tools/fetch-result-ref`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        "x-agent-internal-token": internalToken,
      },
      body: JSON.stringify({
        sessionId: context.sessionID,
        result_ref: args.result_ref,
        max_items: args.max_items,
      }),
    });

    const text = await response.text();
    if (!response.ok) {
      throw new Error(text);
    }
    return text;
  },
});