import { expect, test } from "bun:test";
import { calibrate, normalize, verdictFor, verdictOnItself } from "./oracle.ts";

test("the same question always gets the same verdict", () => {
  const first = verdictFor("Should I ship it on Friday?");
  const again = verdictFor("Should I ship it on Friday?");
  expect(again).toEqual(first);
});

test("shouting, spacing and punctuation are the same question", () => {
  const plain = verdictFor("will it rain");
  expect(verdictFor("Will it rain?")).toEqual(plain);
  expect(verdictFor("  WILL   IT  RAIN!!! ")).toEqual(plain);
  expect(normalize("  Will  it RAIN? ")).toBe("will it rain");
});

test("different questions get different verdicts", () => {
  // Not a guarantee for every pair — a 16-stance table collides — but these
  // two must not read as one question.
  expect(verdictFor("should I quit")).not.toEqual(verdictFor("should I stay"));
});

test("it never admits to a coin flip", () => {
  for (const q of ["a", "b", "c", "should I?", "是否", "x".repeat(280)]) {
    const { confidence } = verdictFor(q);
    expect(confidence).toBeGreaterThanOrEqual(52);
    expect(confidence).toBeLessThanOrEqual(98);
  }
});

test("scoring counts only what a person judged", () => {
  const c = calibrate([
    { confidence: 90, outcome: "right" },
    { confidence: 70, outcome: "wrong" },
    { confidence: 99, outcome: "unjudged" },
  ]);
  expect(c.judged).toBe(2);
  expect(c.right).toBe(1);
  expect(c.accuracy).toBe(50);
  expect(c.claimed).toBe(80);
  expect(c.gap).toBe(30);
});

test("nothing judged is not evidence either way", () => {
  const c = calibrate([{ confidence: 98, outcome: "unjudged" }]);
  expect(c.judged).toBe(0);
  expect(c.accuracy).toBeUndefined();
  expect(verdictOnItself(c)).toContain("Nothing judged yet");
});

test("it calls its own bluster", () => {
  const bluster = calibrate(
    Array.from({ length: 6 }, (_, i) => ({
      confidence: 95,
      outcome: i === 0 ? "right" : "wrong",
    })),
  );
  expect(verdictOnItself(bluster)).toContain("talks a better game");
});