import { describe, expect, it } from "vitest";
import { Template } from "./template";
import { compareParsed, parseExisting } from "./existingVersion";

describe("parseExisting", () => {
  it("从 version_number 模板反向解析 version 和 mc_version", () => {
    const tmpl = new Template("${version}-mc${mc_version}");
    expect(parseExisting(tmpl, "1.2.3-mc1.21")).toEqual({
      version: "1.2.3",
      mc_version: "1.21",
    });
  });

  it("从 filename_format 模板反向解析（含字面量前缀）", () => {
    const tmpl = new Template("modname-${version}-mc${mc_version}.jar");
    expect(parseExisting(tmpl, "modname-0.9.0-mc1.20.1.jar")).toEqual({
      version: "0.9.0",
      mc_version: "1.20.1",
    });
  });

  it("不匹配模板时返回 null", () => {
    const tmpl = new Template("${version}-mc${mc_version}");
    expect(parseExisting(tmpl, "random-string")).toEqual({
      version: null,
      mc_version: null,
    });
  });

  it("捕获段不是合法 SemVer 时返回 null", () => {
    const tmpl = new Template("${version}-mc${mc_version}");
    expect(parseExisting(tmpl, "abc-mc1.21")).toEqual({
      version: null,
      mc_version: null,
    });
  });
});

describe("compareParsed", () => {
  const p = (version: string | null, mc_version: string | null = null) => ({
    version,
    mc_version,
  });

  it("mod_version 降序优先", () => {
    const list = [p("1.0.0"), p("1.2.0"), p("0.9.0")];
    list.sort(compareParsed);
    expect(list.map((x) => x.version)).toEqual(["1.2.0", "1.0.0", "0.9.0"]);
  });

  it("同 mod_version 时 mc_version 降序", () => {
    const list = [
      p("1.0.0", "1.20"),
      p("1.0.0", "1.21"),
      p("1.0.0", "1.19.4"),
    ];
    list.sort(compareParsed);
    expect(list.map((x) => x.mc_version)).toEqual(["1.21", "1.20", "1.19.4"]);
  });

  it("无法解析的排最后", () => {
    const list = [p(null), p("1.0.0", "1.21"), p("0.9.0", "1.20")];
    list.sort(compareParsed);
    expect(list[0]!.version).toBe("1.0.0");
    expect(list[1]!.version).toBe("0.9.0");
    expect(list[2]!.version).toBeNull();
  });
});