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

import {
  BIRTH_SKY_HEADLINES,
  birthSkyFactLine,
  birthSkyCaptionLine,
  birthSkyHeadline,
  octantName,
} from "../src/lib/birth-sky/sentence.ts";
import type { BirthSkyOk } from "../src/lib/birth-sky/contract.ts";
import { birthSkyGolden, goldenSky } from "./birth-sky-test-support.ts";

test("the fictional sample (07:40) reads exactly as the brief", () => {
  const sky = goldenSky("day");
  assert.equal(birthSkyGolden.times.day, "07:40");
  assert.equal(birthSkyHeadline(sky), "星星都在，只是还看不见。");
  assert.equal(birthSkyFactLine(sky), "太阳在东，月亮在脚下，火星正悬在东南");
});

test("each phase takes its one headline from the four-line table", () => {
  assert.deepEqual(Object.values(BIRTH_SKY_HEADLINES), [
    "星星都在，只是还看不见。",
    "天快亮了，星星正一颗颗退场。",
    "天刚暗下来，星星正一颗颗出来。",
    "那一刻，头顶就是这片天。",
  ]);
  assert.equal(birthSkyHeadline(goldenSky("day")), BIRTH_SKY_HEADLINES.day);
  assert.equal(birthSkyHeadline(goldenSky("twilight_morning")), "天快亮了，星星正一颗颗退场。");
  assert.equal(birthSkyHeadline(goldenSky("twilight_evening")), "天刚暗下来，星星正一颗颗出来。");
  assert.equal(birthSkyHeadline(goldenSky("night")), "那一刻，头顶就是这片天。");
});

test("outside daytime the fact line never names the Sun", () => {
  for (const phase of ["twilight_morning", "twilight_evening", "night"] as const) {
    const line = birthSkyFactLine(goldenSky(phase));
    assert.doesNotMatch(line, /太阳/);
    assert.match(line, /^月亮在(脚下|北|东北|东|东南|南|西南|西|西北)/);
    assert.ok(line.split("，").length <= 2, line);
  }
});

test("fact line combinations: moon above, no visible planet, highest planet wins", () => {
  const base = goldenSky("night");
  const planets = (overrides: Record<string, [number, number]>): BirthSkyOk["planets"] => base.planets.map((planet) => {
    const next = overrides[planet.id];
    return next ? { ...planet, altitude: next[0], azimuth: next[1] } : { ...planet, altitude: -10 };
  });
  assert.equal(
    birthSkyFactLine({ phase: "night", planets: planets({ moon: [40, 225], jupiter: [20, 10], venus: [35, 300] }) }),
    "月亮在西南，金星正悬在西北",
  );
  assert.equal(birthSkyFactLine({ phase: "night", planets: planets({}) }), "月亮在脚下");
  assert.equal(
    birthSkyFactLine({ phase: "day", planets: planets({ sun: [10, 225], saturn: [5, 170] }) }),
    "太阳在西南，月亮在脚下，土星正悬在南",
  );
});

test("eight-point compass rounds to the nearest 45 degrees, north at both ends", () => {
  assert.equal(octantName(0), "北");
  assert.equal(octantName(22.4), "北");
  assert.equal(octantName(22.6), "东北");
  assert.equal(octantName(84.69), "东");
  assert.equal(octantName(117.24), "东南");
  assert.equal(octantName(191.14), "南");
  assert.equal(octantName(350), "北");
});

// 原值: 「按你填写的时间」 footnote for a reported time, none for an adopted one.
// 新值: the caption line; an adopted time appends 「 · 校正后」, a reported one adds nothing.
// 原因: TASK-birth-sky-polish-20260928 P2 — the cover prints date, time and city in that line.
test("the caption line appends 「· 校正后」 only for an adopted time", () => {
  const caption = "1994年5月18日 07:40 · 杭州";
  assert.equal(birthSkyCaptionLine({ timeBasis: "reported", caption }), caption);
  assert.equal(birthSkyCaptionLine({ timeBasis: "adopted", caption }), "1994年5月18日 07:40 · 杭州 · 校正后");
});