import assert from "node:assert/strict";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import test from "node:test";

import { downloadInstaller } from "../main/updates/update-download";

test("downloadInstaller writes into the update temp directory and removes staging files", async () => {
  const previousFetch = globalThis.fetch;
  const tempDirectory = fs.mkdtempSync(path.join(os.tmpdir(), "scoreko-update-download-"));

  globalThis.fetch = async () => new Response("installer-bytes");

  try {
    const installerPath = await downloadInstaller(
      {
        version: "0.2.0",
        title: "Scoreko 0.2.0",
        installer: {
          name: "Scoreko/setup:0.2.0.exe",
          downloadUrl: "https://updates.local/Scoreko-setup-0.2.0.exe",
        },
      },
      { tempDirectory, allowInsecureHttp: false },
    );

    const downloadDirectory = path.join(tempDirectory, "scoreko-updates");
    assert.equal(installerPath, path.join(downloadDirectory, "Scoreko_setup_0.2.0.exe"));
    assert.equal(fs.readFileSync(installerPath, "utf8"), "installer-bytes");
    assert.deepEqual(
      fs.readdirSync(downloadDirectory).filter((entry) => entry.endsWith(".download")),
      [],
    );
  } finally {
    globalThis.fetch = previousFetch;
  }
});

test("downloadInstaller rejects insecure production download URLs", async () => {
  const tempDirectory = fs.mkdtempSync(path.join(os.tmpdir(), "scoreko-update-download-"));

  await assert.rejects(
    () =>
      downloadInstaller(
        {
          version: "0.2.0",
          title: "Scoreko 0.2.0",
          installer: {
            name: "Scoreko-setup-0.2.0.exe",
            downloadUrl: "http://updates.local/Scoreko-setup-0.2.0.exe",
          },
        },
        { tempDirectory, allowInsecureHttp: false },
      ),
    /unsupported protocol/,
  );
});

test("downloadInstaller reuses existing file if size matches and does not download again", async () => {
  const tempDirectory = fs.mkdtempSync(path.join(os.tmpdir(), "scoreko-update-download-"));
  const downloadDirectory = path.join(tempDirectory, "scoreko-updates");
  fs.mkdirSync(downloadDirectory, { recursive: true });

  const installerPath = path.join(downloadDirectory, "Scoreko_setup_0.2.0.exe");
  fs.writeFileSync(installerPath, "cached-installer-bytes");
  const cachedSize = fs.statSync(installerPath).size;

  const previousFetch = globalThis.fetch;
  globalThis.fetch = async () => {
    throw new Error("Should not fetch when using cached file!");
  };

  try {
    const resultPath = await downloadInstaller(
      {
        version: "0.2.0",
        title: "Scoreko 0.2.0",
        installer: {
          name: "Scoreko/setup:0.2.0.exe",
          downloadUrl: "https://updates.local/Scoreko-setup-0.2.0.exe",
          size: cachedSize,
        },
      },
      { tempDirectory, allowInsecureHttp: false },
    );

    assert.equal(resultPath, installerPath);
    assert.equal(fs.readFileSync(resultPath, "utf8"), "cached-installer-bytes");
  } finally {
    globalThis.fetch = previousFetch;
  }
});