const assert = require("node:assert/strict");
const test = require("node:test");
const fs = require("node:fs");
const path = require("node:path");
const vm = require("node:vm");
const ts = require("typescript");

// Execute the actual renderer with a small DOM/IPC fixture; no network or audio.
const source = fs.readFileSync(path.join(__dirname, "../src/hardware.ts"), "utf8");
const compiled = ts.transpileModule(source, {
  compilerOptions: { target: ts.ScriptTarget.ES2022, module: ts.ModuleKind.CommonJS },
}).outputText;

function fixture(overrides = {}) {
  const elements = new Map();
  const element = () => ({
    style: {}, value: "", textContent: "", disabled: false, children: [],
    append(...items) { this.children.push(...items); },
    prepend(...items) { this.children.unshift(...items); },
    replaceChildren(...items) { this.children = items; },
    querySelector() { return null; }, addEventListener() {},
  });
  const get = (id) => {
    if (!elements.has(id)) elements.set(id, element());
    return elements.get(id);
  };
  const events = [];
  const closes = [];
  const texts = [];
  const created = {
    conversation_id: "test-conversation", session: {},
    runtime: { transport: "low_load", config_digest: "digest", session_nonce: "nonce", provider_session_ref: "ref", bot_id: "test-bot" },
    session_config: { authorized_context: "test", prompt_bundle_version: "test-v1" },
  };
  const ipc = {
    getRuntimeDefaults: async () => ({}), getHardwareRuntimeDefaults: async () => ({}),
    onHardwareProviderEvent: () => () => {},
    createHardwareAgentSession: async () => created,
    closeHardwareAgent: async (input) => { closes.push(input); },
    hardwareAgentEvent: async (input) => { events.push(input); return { status: "FAILED" }; },
    sendHardwareAgentText: async (input) => { texts.push(input); },
    ...overrides,
  };
  const context = vm.createContext({
    exports: {}, require: () => ({}), console, URL,
    document: { querySelector: () => get("app"), getElementById: get, createElement: element },
    window: { deviceSimulator: ipc, addEventListener() {}, clearInterval() {}, setTimeout, setInterval() {} },
  });
  vm.runInContext(compiled + `\nglobalThis.renderer = { state, controls, setPhase, setCheck, resetSessionState, failHardwareConversation, stopHardwareConversation, startHardwareConversation, handleProviderEvent, sendTextQuestion, buildReport };`, context);
  return { r: context.renderer, events, closes, texts, created, get, ipc };
}

test("provider error plus connect rejection sends one failure, including late duplicates", async () => {
  const f = fixture();
  const r = f.r;
  f.ipc.connectHardwareAgent = async () => {
    void r.handleProviderEvent({ type: "error", error: { code: "internal_error", message: "StartVoiceChat failed" } });
    throw new Error("wrapped connect rejection");
  };
  r.setPhase("ready", "ready");
  await r.startHardwareConversation();
  await r.failHardwareConversation("SECOND_FAILURE");
  await r.stopHardwareConversation();
  await r.handleProviderEvent({ type: "error", error: { message: "late error" } });
  assert.equal(f.events.length, 1);
  assert.equal(f.events[0].eventType, "session_failed");
  assert.equal(f.events[0].errorCode, "VOLC_HARDWARE_AGENT_ERROR");
  assert.equal(f.closes.length, 1);
  assert.equal(r.state.failure, "internal_error: StartVoiceChat failed");
  assert.equal(r.state.phase, "error");
  assert.equal(r.controls.stop.disabled, true);
  assert.equal(r.controls.check.disabled, false);
});

test("concurrent failure callers share pending cleanup; late events cannot reactivate", async () => {
  let release;
  const gate = new Promise((resolve) => { release = resolve; });
  const f = fixture({ closeHardwareAgent: () => gate });
  f.r.state.platformSession = f.created;
  f.r.state.failure = "first cause";
  f.r.setPhase("active", "active");
  const first = f.r.failHardwareConversation("FIRST");
  const second = f.r.failHardwareConversation("SECOND");
  assert.equal(first, second);
  assert.equal(f.r.state.phase, "stopping");
  await f.r.handleProviderEvent({ type: "response.done" });
  assert.equal(f.r.state.phase, "stopping");
  release();
  await first;
  assert.equal(f.events.length, 1);
  assert.equal(f.events[0].errorCode, "FIRST");
  await f.r.handleProviderEvent({ type: "transport.close", code: 1011 });
  assert.equal(f.r.state.checks.get("provider_closed").status, "failed");
  f.r.controls.textQuestion.value = "should not send";
  await f.r.sendTextQuestion();
  assert.equal(f.texts.length, 0);
});

test("new call clears stale checks, duration and failure while retaining device preparation", async () => {
  const f = fixture();
  f.r.state.platformSession = f.created;
  f.r.state.failure = "old failure";
  await f.r.failHardwareConversation("OLD");
  for (const id of f.r.state.checks.keys()) f.r.setCheck(id, "passed", "old");
  f.get("duration").textContent = "48:15";
  f.r.resetSessionState();
  assert.equal(f.r.state.failure, undefined);
  assert.equal(f.r.state.failureTask, undefined);
  assert.equal(f.get("duration").textContent, "00:00");
  assert.equal(f.r.state.checks.get("platform_authenticated").status, "passed");
  assert.equal(f.r.state.checks.get("credential_resolved").status, "passed");
  assert.equal(f.r.state.checks.get("platform_completed").status, "pending");
  f.r.state.platformSession = { ...f.created, conversation_id: "next-conversation" };
  await f.r.failHardwareConversation("NEW");
  assert.equal(f.events.length, 2);
  assert.equal(f.events[1].conversationID, "next-conversation");
  assert.equal(f.events[1].sequenceNo, 1);
});

test("failed platform receipt does not trigger a new terminal event on hangup", async () => {
  let attempts = 0;
  const f = fixture({ hardwareAgentEvent: async () => { attempts += 1; throw new Error("network unavailable"); } });
  f.r.state.platformSession = f.created;
  await f.r.failHardwareConversation("FIRST");
  await f.r.stopHardwareConversation();
  assert.equal(attempts, 1);
  assert.equal(f.r.state.phase, "error");
  assert.equal(f.r.buildReport().checks.find((c) => c.id === "platform_completed").status, "failed");
});

test("connection rejection without a provider event still reports failure once", async () => {
  const f = fixture({ connectHardwareAgent: async () => { throw new Error("connect timeout"); } });
  f.r.setPhase("ready", "ready");
  await f.r.startHardwareConversation();
  assert.equal(f.events.length, 1);
  assert.equal(f.events[0].errorCode, "WINDOWS_HARDWARE_START_FAILED");
  assert.match(f.r.state.failure, /connect timeout/);
  assert.equal(f.r.state.phase, "error");
});

test("normal hangup still reports completed and closes normally", async () => {
  const f = fixture();
  f.ipc.hardwareAgentEvent = async (input) => { f.events.push(input); return { status: "COMPLETED" }; };
  f.r.state.platformSession = f.created;
  f.r.setPhase("active", "active");
  await f.r.stopHardwareConversation();
  assert.equal(f.events.length, 1);
  assert.equal(f.events[0].eventType, "session_ended");
  assert.equal(f.closes[0].code, 1000);
  assert.equal(f.r.state.phase, "completed");
  assert.equal(f.r.state.failureTask, undefined);
  assert.equal(f.r.controls.start.disabled, false);
});