/* Gloss blocks as the app renders them: lib parses the rows, parseMessage
   decides where each block ends. */

import { describe, it, expect } from "vitest";
import { parseMessage } from "@app/domain/gloss.js";

describe("parseMessage", () => {
  it("splits a gloss block into one entry per = line", () => {
    const p = parseMessage(
      "::gloss\n나 | S | I\n가 | V | go\n= I go.\n밥 | O | rice\n먹어 | V | eat\n= I eat rice.\n::",
    );
    expect(p.gloss).toHaveLength(2);
    expect(p.gloss![0]!.en).toBe("I go.");
    expect(p.gloss![0]!.parts.map((x) => x.ko)).toEqual(["나", "가"]);
    expect(p.gloss![1]!.en).toBe("I eat rice.");
    expect(p.gloss![1]!.parts.map((x) => x.ko)).toEqual(["밥", "먹어"]);
  });

  it("leaves a single-sentence block exactly as parse() produced it", () => {
    const src = "::gloss\n저는 | T | I | 는\n갔어 | V | went | 었\n= I went.\n::";
    const p = parseMessage(src);
    expect(p.gloss).toHaveLength(1);
    expect(p.gloss![0]!.en).toBe("I went.");
    expect(p.gloss![0]!.parts[0]!.highlight).toBe("는");
  });

  it("keeps a trailing sentence that has no = line", () => {
    const p = parseMessage("::gloss\n나 | S | I\n= I.\n밥 | O | rice\n::");
    expect(p.gloss).toHaveLength(2);
    expect(p.gloss![1]!.en).toBe("");
  });

  it("does not disturb the other blocks", () => {
    const p = parseMessage(
      [
        "Have a look.",
        "::gloss",
        "나 | S | I",
        "= I.",
        "밥 | O | rice",
        "= Rice.",
        "::",
        "::task translate",
        "밥 먹어",
        "::",
        "::words",
        "밥 | rice",
        "::",
        "::progress 55 | coming along",
      ].join("\n"),
    );
    expect(p.body).toBe("Have a look.");
    expect(p.gloss).toHaveLength(2);
    expect(p.task!.type).toBe("translate");
    expect(p.words).toHaveLength(1);
    expect(p.progress!.score).toBe(55);
  });

  it("passes a message with no gloss block straight through", () => {
    const p = parseMessage("Just prose.\n::progress 10 | early days");
    expect(p.gloss).toBeNull();
    expect(p.body).toBe("Just prose.");
  });
});