import { expect, test } from "bun:test";
import { mkdtempSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";

process.env.FORGE_APP_DATA = mkdtempSync(join(tmpdir(), "app-"));
process.env.PORT = "0";
const { server } = await import("./server.ts");
const base = `http://${server.hostname}:${server.port}`;

async function accession(description: string): Promise<string> {
  const form = new FormData();
  form.set("description", description);
  const posted = await fetch(base + "/items", { method: "POST", body: form, redirect: "manual" });
  expect(posted.status).toBe(303);
  return posted.headers.get("location")!;
}

test("serves the entrance", async () => {
  const response = await fetch(base + "/");
  expect(response.status).toBe(200);
  expect(await response.text()).toContain("<h1>lost-property</h1>");
});

test("accessions a lost item with a catalogue number and a vitrine", async () => {
  const location = await accession("a single brown leather glove, left hand");
  expect(location).toMatch(/^\/items\/\d+$/);
  const page = await (await fetch(base + location)).text();
  expect(page).toContain("a single brown leather glove");
  expect(page).toMatch(/LP \d{4}\.\d{4}/);
  expect(page).toContain("Outerwear and Umbrellas");
});

test("lists an accessioned item on the entrance", async () => {
  await accession("a set of house keys on a red fob");
  const page = await (await fetch(base + "/")).text();
  expect(page).toContain("a set of house keys on a red fob");
});

test("an empty description is not accessioned", async () => {
  const form = new FormData();
  form.set("description", "   ");
  const posted = await fetch(base + "/items", { method: "POST", body: form, redirect: "manual" });
  expect(posted.status).toBe(303);
  expect(posted.headers.get("location")).toBe("/");
});

test("a case that does not exist answers 404", async () => {
  const response = await fetch(base + "/items/999999");
  expect(response.status).toBe(404);
});

test("a visitor leaves a note saying they saw one like it", async () => {
  const location = await accession("reading glasses, tortoiseshell frame");
  const form = new FormData();
  form.set("kind", "sighting");
  form.set("body", "Saw one just like this at the market on Tuesday.");
  const posted = await fetch(base + location + "/notes", { method: "POST", body: form, redirect: "manual" });
  expect(posted.status).toBe(303);
  const page = await (await fetch(base + location)).text();
  expect(page).toContain("Saw one like it");
  expect(page).toContain("Saw one just like this at the market on Tuesday.");
});

test("a visitor leaves a note saying they have the other half", async () => {
  const location = await accession("a single earring, gold hoop");
  const form = new FormData();
  form.set("kind", "match");
  form.set("body", "I have the matching earring, email me.");
  await fetch(base + location + "/notes", { method: "POST", body: form, redirect: "manual" });
  const page = await (await fetch(base + location)).text();
  expect(page).toContain("Has the other half");
  expect(page).toContain("I have the matching earring, email me.");
});

test("a note needs a valid kind", async () => {
  const location = await accession("a paperback book, dog-eared");
  const form = new FormData();
  form.set("kind", "not-a-real-kind");
  form.set("body", "hello");
  const posted = await fetch(base + location + "/notes", { method: "POST", body: form, redirect: "manual" });
  expect(posted.status).toBe(400);
});

test("a note cannot be left on a case that does not exist", async () => {
  const form = new FormData();
  form.set("kind", "sighting");
  form.set("body", "hello");
  const posted = await fetch(base + "/items/999999/notes", { method: "POST", body: form, redirect: "manual" });
  expect(posted.status).toBe(404);
});

test("stands on the security floor", async () => {
  const response = await fetch(base + "/");
  expect(response.headers.get("content-security-policy")).toContain("default-src 'self'");
  expect(response.headers.get("x-content-type-options")).toBe("nosniff");
});

test("a bug answers with the floor, not the runtime's page", async () => {
  // A percent-escape that is not one makes the search params throw.
  const response = await fetch(base + "/items", {
    method: "POST",
    headers: { "content-type": "application/x-www-form-urlencoded" },
    body: "description=%E0%A4%A",
  });
  expect(response.status).toBe(200);
  expect(response.headers.get("content-security-policy")).toContain("default-src 'self'");
});

test("a body is capped by the bytes read, whatever it claims", async () => {
  // The cap counts bytes as they arrive and never reads Content-Length, so
  // a chunked body with no length is refused the same way this one is.
  const response = await fetch(base + "/items", {
    method: "POST",
    headers: { "content-type": "application/x-www-form-urlencoded" },
    body: "description=" + "x".repeat(1024 * 1024),
  });
  expect(response.status).toBe(413);
});

test("HEAD sees the app up", async () => {
  const response = await server.fetch(new Request(base + "/", { method: "HEAD" }));
  expect(response.status).toBe(200);
  expect(await response.text()).toBe("");
});

test("HEAD on a case answers like GET without a body", async () => {
  const location = await accession("a stuffed teddy bear, missing an eye");
  const response = await server.fetch(new Request(base + location, { method: "HEAD" }));
  expect(response.status).toBe(200);
  expect(await response.text()).toBe("");
});

test("refuses a cross-site post", async () => {
  const form = new FormData();
  form.set("description", "from another site");
  const posted = await fetch(base + "/items", {
    method: "POST",
    body: form,
    redirect: "manual",
    headers: { origin: "https://evil.example", "sec-fetch-site": "cross-site" },
  });
  expect(posted.status).toBe(403);
  expect(await (await fetch(base + "/")).text()).not.toContain("from another site");
});

test("escapes a description that carries markup", async () => {
  const location = await accession("<script>alert(1)</script>");
  const page = await (await fetch(base + location)).text();
  expect(page).not.toContain("<script>alert(1)</script>");
  expect(page).toContain("&lt;script&gt;");
});