import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { createApp } from "../../server/app";
import { loadEnv } from "../../server/env";
import { LIMITS } from "../../shared/types";
import { jpegFile, TINY_PNG, TINY_JPEG } from "./helpers";

const temps: string[] = [];

async function testApp(now?: () => number) {
  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "dc-app-"));
  temps.push(dir);
  const env = loadEnv({
    PUBLIC_BASE_URL: "http://localhost:3000",
    STORAGE_DIR: path.join(dir, "storage"),
    DATABASE_PATH: path.join(dir, "data", "catalogs.sqlite"),
    NODE_ENV: "test",
  });
  return createApp(env, { now });
}

function form(pages: File[], extra: Record<string, string> = {}) {
  const data = new FormData();
  data.set("title", extra.title ?? "");
  data.set("effect", extra.effect ?? "magazine");
  if (extra.flipMs) data.set("flipMs", extra.flipMs);
  for (const page of pages) data.append("pages", page);
  return data;
}

afterEach(async () => {
  await Promise.all(temps.splice(0).map((dir) => fs.rm(dir, { recursive: true, force: true })));
});

describe("catalog HTTP API", () => {
  it("creates a catalog and hides delete token on public GET", async () => {
    const app = await testApp();
    const created = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile("a.jpg"), jpegFile("b.jpg")], { title: "نمونه" }),
      headers: { "x-forwarded-for": "10.0.0.1" },
    });
    expect(created.status).toBe(201);
    const body = await created.json();
    expect(body.id).toMatch(/^[A-Za-z0-9_-]{10}$/);
    expect(body.viewUrl).toBe(`http://localhost:3000/c/${body.id}`);
    expect(body.deleteUrl).toContain("token=");
    expect(body.doneUrl).toContain("/done?token=");
    expect(body.qrUrl).toBe(`/api/catalogs/${body.id}/qr`);

    const pub = await app.request(`/api/catalogs/${body.id}`);
    expect(pub.status).toBe(200);
    const publicBody = await pub.json();
    expect(publicBody.title).toBe("نمونه");
    expect(publicBody.pageCount).toBe(2);
    expect(publicBody.flipMs).toBe(1000);
    expect(publicBody.deleteToken).toBeUndefined();
    expect(JSON.stringify(publicBody)).not.toContain("delete");
  });

  it("stores a custom flip duration", async () => {
    const app = await testApp();
    const created = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()], { flipMs: "1800" }),
      headers: { "x-forwarded-for": "10.0.0.12" },
    });
    expect(created.status).toBe(201);
    const { id } = await created.json();
    const pub = await app.request(`/api/catalogs/${id}`);
    expect((await pub.json()).flipMs).toBe(1800);
  });

  it("clamps flip duration to the allowed range", async () => {
    const app = await testApp();
    const tooFast = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()], { flipMs: "50" }),
      headers: { "x-forwarded-for": "10.0.0.13" },
    });
    const tooSlow = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()], { flipMs: "9000" }),
      headers: { "x-forwarded-for": "10.0.0.14" },
    });
    const fastId = (await tooFast.json()).id;
    const slowId = (await tooSlow.json()).id;
    expect((await (await app.request(`/api/catalogs/${fastId}`)).json()).flipMs).toBe(
      LIMITS.minFlipMs,
    );
    expect((await (await app.request(`/api/catalogs/${slowId}`)).json()).flipMs).toBe(
      LIMITS.maxFlipMs,
    );
  });

  it("serves jpeg pages and png qr", async () => {
    const app = await testApp();
    const created = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()]),
      headers: { "x-forwarded-for": "10.0.0.2" },
    });
    const { id } = await created.json();

    const page = await app.request(`/api/catalogs/${id}/pages/1`);
    expect(page.status).toBe(200);
    expect(page.headers.get("content-type")).toBe("image/jpeg");

    const qr = await app.request(`/api/catalogs/${id}/qr`);
    expect(qr.status).toBe(200);
    expect(qr.headers.get("content-type")).toBe("image/png");
    const qrBytes = Buffer.from(await qr.arrayBuffer());
    expect(qrBytes[0]).toBe(0x89);
    expect(qrBytes[1]).toBe(0x50);
  });

  it("rejects delete without token and keeps the catalog", async () => {
    const app = await testApp();
    const created = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()]),
      headers: { "x-forwarded-for": "10.0.0.3" },
    });
    const { id } = await created.json();
    const denied = await app.request(`/api/catalogs/${id}`, { method: "DELETE" });
    expect(denied.status).toBe(403);
    expect((await app.request(`/api/catalogs/${id}`)).status).toBe(200);
  });

  it("deletes with token then returns 404", async () => {
    const app = await testApp();
    const created = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()]),
      headers: { "x-forwarded-for": "10.0.0.4" },
    });
    const body = await created.json();
    const token = new URL(body.deleteUrl).searchParams.get("token");
    const del = await app.request(`/api/catalogs/${body.id}?token=${token}`, {
      method: "DELETE",
    });
    expect(del.status).toBe(204);
    expect((await app.request(`/api/catalogs/${body.id}`)).status).toBe(404);
  });

  it("rejects more pages than the limit", async () => {
    const app = await testApp();
    const pages = Array.from({ length: LIMITS.maxPages + 1 }, (_, i) =>
      jpegFile(`${i}.jpg`),
    );
    const res = await app.request("/api/catalogs", {
      method: "POST",
      body: form(pages),
      headers: { "x-forwarded-for": "10.0.0.5" },
    });
    expect(res.status).toBe(400);
    expect((await res.json()).error).toContain("صفحه");
  });

  it("accepts a jpeg Blob the way the browser sends pages", async () => {
    const app = await testApp();
    const data = new FormData();
    data.set("title", "");
    data.set("effect", "slide");
    data.append(
      "pages",
      new Blob([TINY_JPEG], { type: "image/jpeg" }),
      "page-001.jpg",
    );
    const res = await app.request("/api/catalogs", {
      method: "POST",
      body: data,
      headers: { "x-forwarded-for": "10.0.0.11" },
    });
    expect(res.status).toBe(201);
  });

  it("rejects an invalid effect", async () => {
    const app = await testApp();
    const res = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()], { effect: "explode" }),
      headers: { "x-forwarded-for": "10.0.0.6" },
    });
    expect(res.status).toBe(400);
    expect((await res.json()).error).toBe("افکت نامعتبر است");
  });

  it("rejects non-jpeg pages", async () => {
    const app = await testApp();
    const res = await app.request("/api/catalogs", {
      method: "POST",
      body: form([new File([TINY_PNG], "x.png", { type: "image/png" })]),
      headers: { "x-forwarded-for": "10.0.0.7" },
    });
    expect(res.status).toBe(400);
    expect((await res.json()).error).toBe("نوع فایل پشتیبانی نمی‌شود");
  });

  it("rate-limits the 11th create from one IP", async () => {
    const app = await testApp(() => 1_000);
    for (let i = 0; i < 10; i++) {
      const res = await app.request("/api/catalogs", {
        method: "POST",
        body: form([jpegFile()]),
        headers: { "x-forwarded-for": "10.0.0.8" },
      });
      expect(res.status).toBe(201);
    }
    const blocked = await app.request("/api/catalogs", {
      method: "POST",
      body: form([jpegFile()]),
      headers: { "x-forwarded-for": "10.0.0.8" },
    });
    expect(blocked.status).toBe(429);
  });

  it("has no public catalog list", async () => {
    const app = await testApp();
    const res = await app.request("/api/catalogs");
    expect(res.status).toBe(404);
  });
});