/**
 * DSH 桌面端插件（cordis plugin）：scheduler-gateway-merged
 * 与 standalone 共享同一中心网关 HTTP API（默认 127.0.0.1:4180）。
 * 注册四个工具：
 *   gateway_status 总览（队列/在途/节点/死信）
 *   gateway_run    建任务 / 触发真实 LLM 流水线 / 后台起 server
 *   gateway_board  任务清单
 *   gateway_nodes  节点健康与能力
 * 零运行时依赖（defineTool 由 DSH 宿主 @deepseek-ai/dsh-tools 提供）。
 *
 * 注意：cordis 加载器要求插件入口导出「函数或带 apply 的对象」（unwrapExports 取 default），
 * 所以本文件 default 导出必须是 { name, inject, apply } 形态，工具在 apply(ctx) 里经
 * ctx.tools.register 注册——不能在模块顶层直接注册。
 */
import { defineTool } from "@deepseek-ai/dsh-tools";
import { spawn } from "node:child_process";
import { fileURLToPath } from "node:url";
import { dirname, resolve } from "node:path";

const HERE = dirname(fileURLToPath(import.meta.url));
const ROOT = resolve(HERE, "..");
const GW = (typeof process !== "undefined" && process.env?.GATEWAY_URL) || "http://127.0.0.1:4180";

async function api(path, opts) {
  const r = await fetch(GW + path, opts);
  const j = await r.json().catch(() => ({}));
  if (!r.ok) throw new Error(`网关 HTTP ${r.status}: ${JSON.stringify(j).slice(0, 200)}`);
  return j;
}
const post = (path, body) =>
  api(path, { method: "POST", headers: { "content-type": "application/json" }, body: JSON.stringify(body || {}) });

function textOut(v) {
  return {
    schema: { type: "object", additionalProperties: true, properties: { text: { type: "string" } } },
    render: (_a, v) => [{ type: "text", text: v.text }],
  };
}

const gatewayStatus = defineTool({
  name: "gateway_status",
  description: "查看调度网关总览：队列长度、在途、在线节点与负载、重试/死信计数、任务状态分布。",
  parameters: {},
  output: textOut(),
  async execute() {
    const s = await api("/api/status");
    const text =
      `队列 ${s.queue}｜在途 ${s.inFlight}｜节点 ${s.nodesOnline}/${s.nodes}｜重试 ${s.retry}｜死信 ${s.deadLetter}\n` +
      s.nodeHealth
        .map(
          (n) =>
            `- ${n.name || n.nodeId}（${n.nodeId}）[${n.kind}] ${n.online ? "🟢 在线" : "⚪ 离线"} 负载${n.load} caps=${n.caps.join("/")}`,
        )
        .join("\n");
    return { ...s, text };
  },
});

const gatewayRun = defineTool({
  name: "gateway_run",
  description:
    "启动网关后台服务(serve)，或提交任务(task)，或触发真实大模型多智能体流水线(pipeline：planner→跨节点workers→reviewer→merger)。",
  parameters: {
    action: { type: "string", required: true, description: "serve | task | pipeline" },
    goal: { type: "string", description: "task/pipeline 的任务内容" },
    priority: { type: "number", description: "优先级 1-10，默认 5" },
    capabilities: { type: "string", description: "能力标签逗号分隔，如 worker,shell" },
  },
  output: textOut(),
  async execute(args) {
    if (args.action === "serve") {
      const child = spawn(process.execPath, [resolve(ROOT, "src", "cli-live.js"), "server"], {
        detached: true,
        stdio: "ignore",
        env: process.env,
      });
      child.unref();
      return { pid: child.pid, text: `中心网关已后台启动 pid=${child.pid}，面板 ${GW}/panel` };
    }
    if (args.action === "pipeline") {
      const r = await post("/api/pipeline", { goal: args.goal });
      return { text: `流水线已提交：${r.run?.runId}\n约 1-2 分钟后可用 gateway_status / gateway_board 查看。` };
    }
    const r = await post("/api/tasks", {
      title: (args.goal || "").slice(0, 40),
      prompt: args.goal,
      priority: args.priority || 5,
      capabilities: String(args.capabilities || "worker").split(",").map((s) => s.trim()).filter(Boolean),
    });
    return { taskId: r.task.id, text: `任务已入队 ${r.task.id}（优先级 ${r.task.priority}）` };
  },
});

const gatewayBoard = defineTool({
  name: "gateway_board",
  description: "列出网关上的任务（可按状态过滤），返回编号/标题/状态/节点/尝试/评分。",
  parameters: {
    status: { type: "string", description: "可选：queued/assigned/running/done/dead" },
  },
  output: textOut(),
  async execute(args) {
    const { tasks } = await api("/api/tasks");
    const list = (args.status ? tasks.filter((t) => t.state === args.status) : tasks).slice(-50);
    const lines = list
      .slice()
      .reverse()
      .map((t) => `- ${t.id.slice(-8)} [${t.state}] ${(t.title || "").slice(0, 50)} →${t.nodeId || "-"} 试${t.attempts} 分${t.result?.score ?? "-"}`);
    return { count: list.length, text: `共 ${list.length} 个任务：\n${lines.join("\n") || "（无）"}` };
  },
});

const gatewayNodes = defineTool({
  name: "gateway_nodes",
  description: "查看注册到中心网关的节点：native 直连 / adapter 兼容转化层，及其能力、负载、健康。",
  parameters: {},
  output: textOut(),
  async execute() {
    const { nodes } = await api("/api/nodes");
    const text = nodes
      .map((n) => {
        const nm = n.name || n.meta?.name || n.nodeId; // agent 显示名称，缺省回退 nodeId
        const st = n.online ? "🟢 在线" : "⚪ 离线";
        const mdl = n.model ? ` · ${n.model}` : "";
        return `- ${nm}（${n.nodeId}）[${n.kind}] ${st}${mdl} 能力=${n.capabilities.join("/")} 负载${n.inFlight}/${n.maxConcurrency} 完成${n.completed}/失败${n.failed}`;
      })
      .join("\n");
    return { count: nodes.length, text: text || "（暂无节点注册）" };
  },
});

const tools = [gatewayStatus, gatewayRun, gatewayBoard, gatewayNodes];

/** 稳定 cordis 插件名。 */
const name = "scheduler-gateway-merged";
/** 挂载前需就绪的宿主服务。 */
const inject = ["tools"];

/** 在宿主上下文中注册四个网关工具。 */
function apply(ctx) {
  ctx.effect(() => {
    const disposers = tools.map((tool) => ctx.tools.register(tool));
    return () => {
      for (const dispose of disposers) dispose();
    };
  }, "scheduler-gateway-merged: tools");
}

const plugin = { name, inject, apply };

export { plugin as default, name, inject, apply, tools, gatewayStatus, gatewayRun, gatewayBoard, gatewayNodes };