import { expect } from "bun:test";
import { tmpdir } from "node:os";
import { join } from "node:path";
import type { AuthUser, ServerContext } from "@stc/contracts";
import { createApp, createJobQueue, resolveConfig } from "@stc/core";
import { createCourseRepository } from "@stc/course-format";
import { forEachDb } from "../../db/test/helpers";
import { importFeature } from "../src";
import { mkdir, stat, symlink } from "node:fs/promises";
import { makeVideo, tmp } from "./fixtures";

const owner: AuthUser = { id: "o", email: "o@x", name: "O", roles: ["owner"], groups: [] };
const learner: AuthUser = { id: "l", email: "l@x", name: "L", roles: ["learner"], groups: [] };

async function setup(db: any, env: Record<string, string | undefined> = {}) {
  const dataDir = await tmp("stc-data-");
  const courses = await createCourseRepository([join(dataDir, "courses")]);
  const ctx = {
    config: resolveConfig({
      databaseUrl: "", dataDir, courseDirs: [join(dataDir, "courses")], secret: "t", publicUrl: "http://x",
      python: process.env.STC_PYTHON || "python3",
      importRoots: "STC_IMPORT_ROOTS" in env ? (env.STC_IMPORT_ROOTS ? [env.STC_IMPORT_ROOTS] : undefined) : [tmpdir()],
      transcribeUrl: env.STC_TRANSCRIBE_URL ?? null,
    }),
    db, courses,
    auth: { userFromRequest: async (req: Request) => ({ owner, learner }[req.headers.get("x-user") ?? ""] ?? null) },
  } as unknown as ServerContext;
  const feature = importFeature(ctx);
  const queue = createJobQueue(db, feature.jobs!, { pollMs: 10 });
  ctx.jobs = queue;
  const app = createApp(ctx, [feature]);
  const call = (path: string, init: RequestInit & { as?: string; json?: unknown } = {}) =>
    app.fetch(new Request(`http://x${path}`, {
      method: init.method, headers: { origin: "http://x", ...(init.as ? { "x-user": init.as } : {}), ...(init.json !== undefined ? { "content-type": "application/json" } : {}) },
      body: init.json !== undefined ? JSON.stringify(init.json) : undefined,
    }));
  return { ctx, queue, call, dataDir };
}
const until = async (f: () => Promise<boolean>) => { for (let i = 0; i < 600; i++) { if (await f()) return; await Bun.sleep(20); } throw new Error("timeout"); };

forEachDb("only the owner reaches the import API", async (db) => {
  const { call } = await setup(db);
  expect((await call("/api/import/info")).status).toBe(401);
  expect((await call("/api/import/info", { as: "learner" })).status).toBe(403);
  expect((await call("/api/import/jobs", { as: "learner", method: "POST", json: {} })).status).toBe(403);
  const r = await call("/api/import/info", { as: "owner" });
  expect(await r.json()).toMatchObject({ transcribe: false, coursesDirServed: true });
});

forEachDb("job creation validates input", async (db) => {
  const { call } = await setup(db);
  const post = async (json: unknown) => call("/api/import/jobs", { as: "owner", method: "POST", json });
  expect((await post({ kind: "nope", path: "/tmp" })).status).toBe(400);
  expect((await post({ kind: "video-folder" })).status).toBe(400);
  expect((await post({ kind: "video-folder", path: "/definitely/not/here" })).status).toBe(400);
  expect((await post({ kind: "video-folder", path: "relative" })).status).toBe(400);
  expect((await post({ kind: "pdf-deck", path: "/tmp", options: { courseId: "x" } })).status).toBe(400);
  expect((await post({ kind: "code-repo", path: "/tmp" })).status).toBe(400);
  expect((await post({ kind: "transcribe", options: { courseId: "x" } })).status).toBe(409);
});

forEachDb("a folder import runs through the real queue, then cover candidates can be chosen", async (db) => {
  const { call, queue, dataDir } = await setup(db);
  queue.start();
  try {
    const src = join(await tmp(), "Queue Videos");
    await makeVideo(join(src, "1 - a.mp4"), 1);
    await makeVideo(join(src, "2 - b.mp4"), 1);
    const r = await call("/api/import/jobs", { as: "owner", method: "POST", json: { kind: "video-folder", path: src, options: { title: "Queued", bogus: 1 } } });
    expect(r.status).toBe(202);
    const { id } = (await r.json()) as { id: string };
    await until(async () => ["done", "failed"].includes((await queue.get(id))!.status));
    const job = (await queue.get(id))!;
    expect(job.error).toBeNull();
    expect(job.status).toBe("done");
    expect(job.result).toMatchObject({ courseId: "queued", warnings: [] });
    expect(job.payload).toEqual({ kind: "video-folder", path: src, options: { title: "Queued" } });

    const list = (await (await call("/api/import/jobs", { as: "owner" })).json()) as any[];
    expect(list.map((j) => j.id)).toContain(id);
    const courses = (await (await call("/api/import/courses", { as: "owner" })).json()) as any[];
    expect(courses).toEqual([{ id: "queued", title: "Queued", modules: [{ id: "m1", title: "Videos", lessons: [{ id: "l1", title: "a" }, { id: "l2", title: "b" }] }] }]);

    const covers = (await (await call("/api/import/covers/queued", { as: "owner" })).json()) as any;
    expect(covers.current).toBe("media/cover.jpg");
    expect(covers.candidates).toEqual(["frame-1.jpg", "frame-2.jpg"]);
    const img = await call("/api/import/covers/queued/frame-2.jpg", { as: "owner" });
    expect(img.headers.get("content-type")).toBe("image/jpeg");
    expect((await call("/api/import/covers/queued/frame-2.jpg")).status).toBe(401);
    expect((await call("/api/import/covers/queued/..%2F..%2Fx.jpg", { as: "owner" })).status).toBe(404);
    const set = await call("/api/import/covers/queued", { as: "owner", method: "POST", json: { name: "frame-2.jpg" } });
    expect(set.status).toBe(200);
    expect((await call("/api/import/covers/queued", { as: "owner", method: "POST", json: { name: "../evil.jpg" } })).status).toBe(400);
    expect(await Bun.file(join(dataDir, "courses/queued/media/cover.jpg")).exists()).toBe(true);
  } finally { await queue.stop(); }
});

forEachDb("paths must stay inside the import roots", async (db) => {
  const inbox = await tmp("stc-inbox-");
  const outside = await tmp("stc-outside-");
  await mkdir(join(inbox, "ok"));
  await symlink(outside, join(inbox, "escape"));
  const { call, ctx } = await setup(db, { STC_IMPORT_ROOTS: inbox });
  const post = (path: string) => call("/api/import/jobs", { as: "owner", method: "POST", json: { kind: "video-folder", path } });
  const bad = await post(outside);
  expect(bad.status).toBe(400);
  expect(await bad.json()).toEqual({ error: "path is outside the allowed import folders" });
  expect((await post(join(inbox, "..", "x"))).status).toBe(400);
  expect((await post(join(inbox, "escape"))).status).toBe(400); // symlink out of the root
  expect((await post("/etc")).status).toBe(400);
  expect((await post(join(inbox, "ok"))).status).toBe(202);
  const info = (await (await call("/api/import/info", { as: "owner" })).json()) as any;
  expect(info.importRoots).toEqual([inbox]);
  void ctx;
});

forEachDb("the default root is created under dataDir", async (db) => {
  const { dataDir } = await setup(db, { STC_IMPORT_ROOTS: undefined });
  expect((await stat(join(dataDir, "import-inbox"))).isDirectory()).toBe(true);
});