import { describe, expect, test } from "bun:test";
import { resolveAnalyte } from "../src/lib/analytes";
import { normalizeMarker } from "../src/lib/normalize";
import { convert } from "../src/lib/units";

describe("units", () => {
  test("dimensional scaling: ng/mL → µg/L is 1:1", () => {
    expect(convert(30, "ng/mL", "µg/L")).toBeCloseTo(30);
  });
  test("mass→mole bridge needs molar mass", () => {
    expect(convert(100, "mg/dL", "mmol/L")).toBeNull();
    expect(convert(100, "mg/dL", "mmol/L", 180.16)).toBeCloseTo(5.551, 2); // glucose
  });
  test("mole→mass: testosterone 20 nmol/L → ng/dL", () => {
    expect(convert(20, "nmol/L", "ng/dL", 288.42)).toBeCloseTo(576.8, 0);
  });
  test("percent only converts to percent", () => {
    expect(convert(42, "%", "%")).toBe(42);
    expect(convert(42, "%", "mg/dL")).toBeNull();
  });
  test("count units: x10^9/L → thousand/uL is 1:1", () => {
    expect(convert(6.1, "x10^9/L", "thousand/uL")).toBeCloseTo(6.1);
  });
});

describe("analytes", () => {
  test("alias resolution is case/space-insensitive", () => {
    expect(resolveAnalyte("Total  Testosterone")?.key).toBe("testosterone_total");
    expect(resolveAnalyte("HbA1c")?.key).toBe("hba1c");
    expect(resolveAnalyte("definitely not a marker")).toBeNull();
  });
});

describe("normalizeMarker", () => {
  test("known analyte converts to canonical unit and registry panel", () => {
    const n = normalizeMarker({ panel: "chemistry", name: "Glucose", value: "100", unit: "mg/dL", referenceRange: "70-99", flagged: true });
    expect(n.analyteKey).toBe("glucose");
    expect(n.panel).toBe("metabolic"); // registry panel wins for consistent grouping
    expect(n.valueCanonical).toBeCloseTo(5.551, 2);
    expect(n.canonicalUnit).toBe("mmol/L");
    expect(n.value).toBe("100"); // raw preserved
    expect(n.flagged).toBe(true);
  });
  test("unknown marker keeps raw fields, no canonical value", () => {
    const n = normalizeMarker({ name: "Exotic Marker X", value: "1.2", unit: "u/L" });
    expect(n.analyteKey).toBeNull();
    expect(n.marker).toBe("Exotic Marker X");
    expect(n.valueCanonical).toBeNull();
  });
  test("comparator values parse numerically", () => {
    const n = normalizeMarker({ name: "hs-CRP", value: "<0.3", unit: "mg/L" });
    expect(n.valueNum).toBeCloseTo(0.3);
    expect(n.value).toBe("<0.3");
  });
  test("BUN is not mapped onto urea (needs N-divisor, not molar mass)", () => {
    expect(resolveAnalyte("BUN")).toBeNull();
    expect(resolveAnalyte("blood urea nitrogen")).toBeNull();
    expect(resolveAnalyte("urea")?.key).toBe("urea");
  });
  test("DHEA-S µg/dL converts with corrected molar mass", () => {
    const n = normalizeMarker({ name: "DHEA-S", value: "250", unit: "ug/dL" });
    expect(n.valueCanonical).toBeCloseTo(6.78, 1); // 250 * 0.02713
  });
  test("thousands-grouped value parses as 1200, not 1 (parseFloat truncation bug)", () => {
    const n = normalizeMarker({ name: "Vitamin B12", value: "1,200", unit: "pg/mL" });
    expect(n.valueNum).toBe(1200);
    expect(n.analyteKey).toBe("vitamin_b12");
    expect(n.valueCanonical).toBeCloseTo(885.35, 1);
    expect(n.canonicalUnit).toBe("pmol/L");
  });
  test("ambiguous European-decimal-looking value is left unmapped, not silently wrong", () => {
    const n = normalizeMarker({ name: "Glucose", value: "5,5", unit: "mg/dL" });
    expect(n.valueNum).toBeNull();
    expect(n.valueCanonical).toBeNull();
    expect(n.value).toBe("5,5"); // raw value preserved
  });
  test("comparator value still parses after strict-parsing rewrite", () => {
    const n = normalizeMarker({ name: "hs-CRP", value: "<0.3", unit: "mg/L" });
    expect(n.valueNum).toBeCloseTo(0.3);
  });
});