/**
 * Hub entry — Fastify server + Feishu WebSocket listener.
 *
 * Wires the full trigger path: lark ws receives `im.message.receive_v1` →
 * trigger handler resolves chat→project (ADR-0001), creates AgentRun + acquires
 * the project lock (ADR-0002), runs the provider-agnostic agent loop
 * (ADR-0017), and releases the lock on finish. Feishu context reads inside the
 * loop are ADR-0003-authorized (chat must match binding).
 *
 * Env (see .env.example):
 *  DATABASE_URL, OPENROUTER_API_KEY, FEISHU_APP_ID/SECRET/BOT_OPEN_ID, PORT
 */
import "dotenv/config";
import Fastify from "fastify";
import { prisma } from "./db.js";
import { OpenRouterProvider } from "./agent/openrouter-provider.js";
import { InMemoryModelRegistry } from "./agent/models.js";
import { ToolRegistry, feishuContextTool } from "./agent/tools.js";
import { readFileTool, writeFileTool, listFilesTool } from "./agent/workspace.js";
import { cphCheckTool, cphBuildTool } from "./agent/cph.js";
import { createLarkClient, startFeishuListenerWithClient, type FeishuRuntime } from "./feishu/client.js";
import { readFeishuContext } from "./feishu/read.js";
import { makeTriggerHandler } from "./feishu/trigger.js";

function requireEnv(name: string): string {
  const v = process.env[name];
  if (v === undefined || v === "") {
    console.error(`[hub] missing required env: ${name}`);
    process.exit(1);
  }
  return v;
}

async function main(): Promise<void> {
  const databaseUrl = requireEnv("DATABASE_URL");
  void databaseUrl; // prisma reads DATABASE_URL from env directly
  const openrouterKey = requireEnv("OPENROUTER_API_KEY");
  const feishuAppId = requireEnv("FEISHU_APP_ID");
  const feishuAppSecret = requireEnv("FEISHU_APP_SECRET");
  const feishuBotOpenId = requireEnv("FEISHU_BOT_OPEN_ID");
  const port = Number(process.env["PORT"] ?? "8788");

  const app = Fastify({ logger: true });

  app.get("/api/healthz", async () => ({ ok: true, ts: Date.now() }));

  // --- Agent seam wiring ---
  const provider = new OpenRouterProvider({ apiKey: openrouterKey });
  const models = new InMemoryModelRegistry(
    [
      { id: "z-ai/glm-4.6", label: "GLM-4.6", toolCapable: true },
      { id: "anthropic/claude-3.5-sonnet", label: "Claude 3.5 Sonnet", toolCapable: true },
    ],
    [
      { id: "draft", label: "草稿", defaultModel: "z-ai/glm-4.6" },
      { id: "review", label: "审校", defaultModel: "anthropic/claude-3.5-sonnet" },
    ],
  );

  // Build the lark client first — tools that call Feishu APIs hold it from boot.
  const feishuConfig = { appId: feishuAppId, appSecret: feishuAppSecret, botOpenId: feishuBotOpenId };
  const larkClient = createLarkClient(feishuConfig);
  const feishuRt: FeishuRuntime = { client: larkClient, logger: app.log };

  const tools = new ToolRegistry();
  // ADR-0003: the handler enforces chat==boundChat before any API call;
  // real read wraps @larksuiteoapi/node-sdk's im.v1.message get/list.
  tools.register(feishuContextTool(readFeishuContext, feishuRt));
  // Workspace file tools (ADR-0007 directory tree, path-confined).
  tools.register(readFileTool());
  tools.register(writeFileTool());
  tools.register(listFilesTool());
  // cph CLI tools (ADR-0016 version contract enforced by cph itself).
  tools.register(cphCheckTool());
  tools.register(cphBuildTool());

  // --- Feishu listener (reuses the same lark client) ---
  const trigger = makeTriggerHandler({ prisma, provider, tools, models, logger: app.log });
  startFeishuListenerWithClient(feishuConfig, larkClient, app.log, trigger);

  app.listen({ port, host: "0.0.0.0" }, (err, address) => {
    if (err !== null) {
      app.log.error({ err }, "listen failed");
      process.exit(1);
    }
    app.log.info({ address }, "hub listening");
  });
}

main().catch((e) => {
  console.error("[hub] fatal:", e);
  process.exit(1);
});