import assert from "node:assert/strict";
import { readFile } from "node:fs/promises";
import { loadSimulationCase, toWorkerConfiguration } from "../workspace/sim-case-loader.mjs";
import { SimSession, CONTEXT_ID } from "./sim-session.mjs";

const fetchImpl = async (url) => {
  try {
    const body = await readFile(new URL(`../../${String(url).replace(/^\//, "")}`, import.meta.url));
    return { ok: true, text: async () => body.toString("utf8") };
  } catch {
    return { ok: false, text: async () => "" };
  }
};
const core = { _sim_create() { return 0; }, _sim_load_workspace() { return 0; }, _sim_protocol_reset() {}, _sim_protocol_accept() { return 0; } };

function startup(path, sequence) {
  return loadSimulationCase({ path, fetchImpl }).then((bundle) => {
    const session = new SimSession(core, { sessionId: path });
    const base = { schema_version: 1, context_id: CONTEXT_ID, session_id: path };
    session.accept({ ...base, kind: "HELLO", seq: sequence, payload: {} });
    session.accept({ ...base, kind: "SESSION_ATTACH", seq: sequence + 1, operation_id: "attach", payload: {} });
    return { bundle, response: session.accept({ ...base, kind: "LOAD_WORKSPACE", seq: sequence + 2, operation_id: "load", payload: { root_path: "/workspace", configuration: toWorkerConfiguration(bundle) } }) };
  });
}

const minimal = await startup("linuxcnc/configs/sim/axis/minimal_xyz.ini", 1);
assert.equal(minimal.bundle.status, "ready");
assert.equal(minimal.bundle.missing.length, 0);
assert.equal(minimal.response.kind, "COMMAND_RESULT");
assert.equal(minimal.response.payload.configuration.state, "TASK_READY");
assert.ok(minimal.bundle.runtime_fixtures.some((row) => row.generated_hal === "linuxcnc/configs/sim/axis/minimal_xyz_cmds.hal"));

const corexy = await startup("linuxcnc/configs/sim/axis/corexy/corexy_by_kins.ini", 1);
assert.equal(corexy.bundle.status, "ready");
assert.equal(corexy.bundle.missing.length, 0);
assert.equal(corexy.response.kind, "COMMAND_RESULT");
assert.equal(corexy.response.payload.configuration.state, "TASK_READY");

console.log(JSON.stringify({ schema: "sim-case-startup-s8-02-sample.v1", status: "verified", fixture_policy: "user-authorized-runtime-copy", cases: {
  minimal_xyz: { status: "ready", state: minimal.response.payload.configuration.state, runtime_fixture: minimal.bundle.runtime_fixtures.find((row) => row.generated_hal)?.generated_hal ?? null, loader_hash: minimal.bundle.state_hash, startup_hash: minimal.response.payload.configuration.state_hash },
  corexy_by_kins: { status: "ready", state: corexy.response.payload.configuration.state, fixtures: ["linuxcnc/configs/sim/axis/corexy/linuxcnc.var", "linuxcnc/configs/sim/axis/corexy/tool.tbl"], loader_hash: corexy.bundle.state_hash, startup_hash: corexy.response.payload.configuration.state_hash },
}, boundary: "fixtures are copied from executed LinuxCNC/runtime case inputs and are hash-locked; no unrelated basename substitution" }));