import assert from "node:assert/strict";
import test from "node:test";

import { normalizeQuestions } from "../src/normalize.ts";
import { runRpcQuestions, type RpcQuestionUI } from "../src/rpc.ts";

function mockUi(responses: {
  select?: Array<string | undefined>;
  input?: Array<string | undefined>;
}): RpcQuestionUI & {
  calls: Array<{ kind: "select" | "input"; title: string; options?: string[] }>;
  notifications: Array<{ message: string; type?: "info" | "warning" | "error" }>;
} {
  const selectResponses = [...(responses.select ?? [])];
  const inputResponses = [...(responses.input ?? [])];
  const calls: Array<{ kind: "select" | "input"; title: string; options?: string[] }> = [];
  const notifications: Array<{ message: string; type?: "info" | "warning" | "error" }> = [];
  return {
    calls,
    notifications,
    async select(title, options) {
      calls.push({ kind: "select", title, options });
      assert.ok(selectResponses.length > 0, "unexpected select dialog");
      return selectResponses.shift();
    },
    async input(title) {
      calls.push({ kind: "input", title });
      assert.ok(inputResponses.length > 0, "unexpected input dialog");
      return inputResponses.shift();
    },
    notify(message, type) {
      notifications.push({ message, type });
    },
  };
}

test("asks RPC questions sequentially and preserves stable option values", async () => {
  const questions = normalizeQuestions([
    {
      id: "language",
      label: "Language",
      prompt: "Which language?",
      type: "select",
      options: [
        { value: "ts", label: "TypeScript", description: "Strict typing" },
        { value: "js", label: "JavaScript" },
      ],
    },
    { id: "notes", prompt: "Anything else?", type: "text", required: false },
  ]);
  const ui = mockUi({ select: ["2. JavaScript"], input: ["   "] });

  const result = await runRpcQuestions(ui, questions);

  assert.equal(result.cancelled, false);
  assert.deepEqual(result.answers, [
    {
      id: "language",
      question: "Which language?",
      type: "select",
      answer: "JavaScript",
      value: "js",
      label: "JavaScript",
      custom: false,
      skipped: false,
    },
    {
      id: "notes",
      question: "Anything else?",
      type: "text",
      answer: "",
      value: "",
      label: "Skipped",
      custom: false,
      skipped: true,
    },
  ]);
  assert.match(ui.calls[0]?.title ?? "", /^\[1\/2\] Language:/);
  assert.ok(ui.calls[0]?.options?.includes("1. TypeScript — Strict typing"));
});

test("supports custom RPC answers and repeats required blank input", async () => {
  const questions = normalizeQuestions([{
    id: "other",
    prompt: "Choose or write one",
    type: "select",
    options: [{ value: "known", label: "Known" }],
  }]);
  const ui = mockUi({ select: ["Type something."], input: [" ", "  Custom value  "] });

  const result = await runRpcQuestions(ui, questions);

  assert.equal(result.cancelled, false);
  assert.equal(result.answers[0]?.answer, "Custom value");
  assert.equal(result.answers[0]?.custom, true);
  assert.deepEqual(ui.notifications, [{ message: "An answer is required.", type: "warning" }]);
});

test("returns cancelled with partial answers when an RPC dialog is dismissed", async () => {
  const questions = normalizeQuestions([
    { id: "name", prompt: "Name?", type: "text" },
    { id: "confirm", prompt: "Continue?", type: "select", options: [{ value: "yes", label: "Yes" }] },
  ]);
  const ui = mockUi({ input: ["Ada"], select: [undefined] });

  const result = await runRpcQuestions(ui, questions);

  assert.equal(result.cancelled, true);
  assert.equal(result.answers.length, 1);
  assert.equal(result.answers[0]?.answer, "Ada");
});

test("does not open RPC dialogs after abort", async () => {
  const questions = normalizeQuestions([{ id: "name", prompt: "Name?", type: "text" }]);
  const ui = mockUi({});
  const controller = new AbortController();
  controller.abort();

  const result = await runRpcQuestions(ui, questions, controller.signal);

  assert.equal(result.cancelled, true);
  assert.deepEqual(result.answers, []);
  assert.deepEqual(ui.calls, []);
});