import assert from "node:assert/strict";
import { test } from "node:test";
import { createServer } from "node:http";
import { GiteaClient } from "../client.ts";

test("every page of a pull request's files is read, though the forge caps a page at fifty", async () => {
  const total = 59;
  const server = createServer((req, res) => {
    const url = new URL(req.url ?? "", "http://x");
    const page = Number(url.searchParams.get("page") ?? "1");
    const start = (page - 1) * 50;
    const files = Array.from({ length: Math.max(0, Math.min(50, total - start)) }, (_, i) => ({
      filename: `modules/m${start + i}/x`, status: start + i === 3 ? "deleted" : "changed" }));
    res.setHeader("content-type", "application/json");
    res.end(JSON.stringify(files));
  });
  await new Promise<void>((r) => server.listen(0, r));
  const port = (server.address() as any).port;
  const client = new GiteaClient(`http://127.0.0.1:${port}`, "t");
  const got = await client.listPullFiles("novox", "mesh-catalog", 60);
  server.close();
  assert.equal(got.paths.length, total);
  assert.equal(got.truncated, false);
  assert.equal(new Set(got.paths).size, total);
  assert.deepEqual(got.removed, ["modules/m3/x"], "a file the merge deleted is said as deleted");
});

test("a pass asks only the repositories that moved since the last look, every one before the first", async () => {
  const { movedSince } = await import("../client.ts");
  const repos = [
    { full_name: "a/old", name: "old", owner: "a", private: false, html_url: "", updated_at: "2026-10-05T10:00:00Z" },
    { full_name: "a/new", name: "new", owner: "a", private: false, html_url: "", updated_at: "2026-10-05T16:10:02Z" },
    { full_name: "a/unknown", name: "unknown", owner: "a", private: false, html_url: "" },
  ];
  assert.deepEqual(movedSince(repos, "").map((r) => r.name), ["old", "new", "unknown"]);
  assert.deepEqual(movedSince(repos, "2026-10-05T16:09:00.000Z").map((r) => r.name), ["new", "unknown"]);
  assert.deepEqual(movedSince(repos, "2026-10-05T18:10:02+02:00").map((r) => r.name), ["new", "unknown"], "an offset is a moment, not a string");
});

test("the directories above a merge's files that hold a module at the commit are said, the root never", async () => {
  const { directoriesAbove } = await import("../client.ts");
  assert.deepEqual(directoriesAbove(["modules/showcase/index.ts", "modules/showcase/daemon/x.ts", "README.md", "/modules/lib/a.go"]),
    ["modules", "modules/lib", "modules/showcase", "modules/showcase/daemon"]);
  const asked: string[] = [];
  const server = createServer((req, res) => {
    const url = new URL(req.url ?? "", "http://x");
    asked.push(`${url.pathname}@${url.searchParams.get("ref")}`);
    const held = ["/api/v1/repos/novox/mesh-catalog/contents/modules/showcase/module.json"];
    res.statusCode = held.includes(url.pathname) ? 200 : 404;
    res.end(res.statusCode === 200 ? "{}" : '{"message":"not found"}');
  });
  await new Promise<void>((r) => server.listen(0, r));
  const port = (server.address() as any).port;
  const client = new GiteaClient(`http://127.0.0.1:${port}`, "t");
  const got = await client.moduleDirsAt("novox", "mesh-catalog", "abc", ["modules/showcase/index.ts", "modules/lib/x.go"]);
  const capped = await client.moduleDirsAt("novox", "mesh-catalog", "abc", ["a/b/c/d.ts"], 2);
  server.close();
  assert.deepEqual(got, ["modules/showcase"], "a directory holding a manifest is a module; one holding none is not");
  assert.ok(asked.every((a) => a.endsWith("@abc")), "looked up at the merge commit");
  assert.equal(capped, null, "past the bound it is not said, and the mesh keeps its old rule");
});

test("a lookup the forge refuses is thrown, not read as no module", async () => {
  const server = createServer((_req, res) => {
    res.statusCode = 500;
    res.end("down");
  });
  await new Promise<void>((r) => server.listen(0, r));
  const port = (server.address() as any).port;
  const client = new GiteaClient(`http://127.0.0.1:${port}`, "t");
  await assert.rejects(client.moduleDirsAt("novox", "mesh-catalog", "abc", ["modules/x/y.ts"]));
  server.close();
});