import assert from "node:assert/strict";
import { describe, it } from "node:test";

import { buildSearchUrl, parseCliRequest, runCli } from "../src/cli.js";

function createOutput() {
  let stdout = "";
  let stderr = "";
  return {
    stdout: { write: (chunk: string) => { stdout += chunk; return true; } },
    stderr: { write: (chunk: string) => { stderr += chunk; return true; } },
    get stdoutText() { return stdout; },
    get stderrText() { return stderr; }
  };
}

describe("amazon-shopping CLI", () => {
  it("prints help", async () => {
    const output = createOutput();
    const code = await runCli(["--help"], output);

    assert.equal(code, 0);
    assert.match(output.stdoutText, /scripts\/search-products/);
    assert.match(output.stdoutText, /--dry-run/);
  });

  it("defaults to 15 results and two search pages", () => {
    const request = parseCliRequest(["usb c cable"]);

    assert.equal(request.query, "usb c cable");
    assert.equal(request.limit, 15);
    assert.equal(request.maxSearchPages, 2);
    assert.equal(request.output, "json");
  });

  it("maps kebab-case CLI filters into the request contract", () => {
    const request = parseCliRequest([
      "--query",
      "100w led bulbs",
      "--min-rating",
      "4.5",
      "--min-reviews",
      "200",
      "--max-unit-price",
      "4",
      "--max-search-pages",
      "3",
      "--skip-details",
      "--dry-run"
    ]);

    assert.equal(request.query, "100w led bulbs");
    assert.equal(request.filters.minRating, 4.5);
    assert.equal(request.filters.minReviews, 200);
    assert.equal(request.filters.maxUnitPrice, 4);
    assert.equal(request.maxSearchPages, 3);
    assert.equal(request.skipDetails, true);
    assert.equal(request.dryRun, true);
  });

  it("maps output modes", () => {
    assert.equal(parseCliRequest(["usb c cable", "--json"]).output, "json");
    assert.equal(parseCliRequest(["usb c cable", "--markdown"]).output, "markdown");
    assert.equal(parseCliRequest(["usb c cable", "--json", "--markdown"]).output, "both");
  });

  it("rejects limits below one", () => {
    assert.throws(
      () => parseCliRequest(["usb c cable", "--limit", "0"]),
      /limit must be an integer greater than 0/
    );
  });

  it("rejects unsafe large limits unless explicitly allowed", () => {
    assert.throws(
      () => parseCliRequest(["usb c cable", "--limit", "31"]),
      /require --allow-large-limit/
    );
  });

  it("rejects search page caps above five", () => {
    assert.throws(
      () => parseCliRequest(["usb c cable", "--max-search-pages", "6"]),
      /max-search-pages must be 5 or less/
    );
  });

  it("builds the Amazon search URL without live network access", () => {
    assert.equal(
      buildSearchUrl("100w led bulbs"),
      "https://www.amazon.com/s?k=100w%20led%20bulbs"
    );
  });
});