import { mkdirSync, mkdtempSync, rmSync, symlinkSync, utimesSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import path from "node:path";
import {
  ComposioEmulator,
  importMediaLibraryAsset,
  LocalArtifactStore,
  MediaLibraryError,
  searchMediaLibrary,
} from "@rakazo/adapters";
import type { MediaLibrarySource } from "@rakazo/contracts";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import type { createApp } from "../../../apps/api/src/app.ts";
import { sessionCookieHeader } from "./index.js";

type App = { request: (input: string, init?: RequestInit) => Response | Promise<Response> };
type AppHandles = Awaited<ReturnType<typeof createApp>>;

process.env.WAKEUP_DRIVER = "memory";
process.env.SANDBOX_PROVIDER = "fake";
process.env.AGENT_RUNTIME = "scripted";

const hasDb = process.env.VERIFY_DATABASE === "1" && Boolean(process.env.DATABASE_URL);
const describeWithDatabase = hasDb ? describe.sequential : describe.skip;

const PNG = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 1, 2, 3]);

describeWithDatabase("media library (PostgreSQL)", () => {
  let handles: AppHandles;
  let app: App;
  const stamp = `${Date.now()}-${Math.random().toString(36).slice(2)}`;
  const dataDir = mkdtempSync(path.join(tmpdir(), "rakazo-library-data-"));
  const library = mkdtempSync(path.join(tmpdir(), "rakazo-library-"));
  const outside = mkdtempSync(path.join(tmpdir(), "rakazo-library-outside-"));

  beforeAll(async () => {
    const { createApp } = await import("../../../apps/api/src/app.ts");
    handles = await createApp({
      databaseUrl: process.env.DATABASE_URL!,
      dataDir,
      sandboxProvider: "fake",
      agentRuntime: "scripted",
      wakeupDriver: "memory",
      signupsEnabled: "true",
      composio: new ComposioEmulator(),
    });
    app = handles.app;

    mkdirSync(path.join(library, "Italy 2024"));
    mkdirSync(path.join(library, ".thumbnails"));
    writeFileSync(path.join(library, "Italy 2024", "beach.png"), PNG);
    writeFileSync(path.join(library, "Italy 2024", "notes.txt"), "not media");
    writeFileSync(path.join(library, "birthday.png"), PNG);
    writeFileSync(path.join(library, ".thumbnails", "hidden.png"), PNG);
    writeFileSync(path.join(outside, "secret.png"), PNG);
    symlinkSync(path.join(outside, "secret.png"), path.join(library, "linked.png"));
    utimesSync(
      path.join(library, "Italy 2024", "beach.png"),
      new Date("2024-07-01"),
      new Date("2024-07-01"),
    );
    utimesSync(path.join(library, "birthday.png"), new Date("2025-03-01"), new Date("2025-03-01"));
  });

  afterAll(async () => {
    await handles?.stop();
    for (const dir of [dataDir, library, outside]) rmSync(dir, { recursive: true, force: true });
  });

  async function user(label: string) {
    const cookie = await signup(app, `${label}-${stamp}@rakazo.test`, label);
    const me = await rpc<{ userId: string; spaceId: string }>(app, cookie, "me");
    return { cookie, me };
  }

  async function waitForSync(cookie: string, sourceId: string) {
    const start = Date.now();
    while (Date.now() - start < 20_000) {
      const sources = await rpc<MediaLibrarySource[]>(app, cookie, "media/library/list");
      const source = sources.find((entry) => entry.id === sourceId);
      if (source && source.status !== "syncing") return source;
      await new Promise((resolve) => setTimeout(resolve, 50));
    }
    throw new Error(`library source ${sourceId} never finished syncing`);
  }

  it("indexes, searches and imports only the owner's own library files", async () => {
    const owner = await user("library-owner");
    const other = await user("library-other");
    await handles.prisma.deploymentSettings.upsert({
      where: { id: "default" },
      create: { id: "default", ownerUserId: owner.me.userId },
      update: { ownerUserId: owner.me.userId },
    });

    expect((await raw(app, other.cookie, "media/library/list")).status).toBe(403);
    expect((await raw(app, other.cookie, "media/library/add", { path: library })).status).toBe(403);
    expect(
      (await raw(app, owner.cookie, "media/library/add", { path: "relative/folder" })).status,
    ).toBe(400);
    expect(
      (await raw(app, owner.cookie, "media/library/add", { path: path.join(library, "nope") }))
        .status,
    ).toBe(400);

    const added = await rpc<MediaLibrarySource>(app, owner.cookie, "media/library/add", {
      path: library,
    });
    expect(added).toMatchObject({ path: library, status: "syncing" });
    // Adding the same folder again returns it instead of a duplicate.
    expect(
      (await rpc<MediaLibrarySource>(app, owner.cookie, "media/library/add", { path: library })).id,
    ).toBe(added.id);
    const synced = await waitForSync(owner.cookie, added.id);
    expect(synced).toMatchObject({ status: "idle", error: null, assetCount: 2 });
    expect(synced.lastSyncedAt).not.toBeNull();

    const all = await searchMediaLibrary(handles.prisma, owner.me.userId, {});
    expect(all.total).toBe(2);
    expect(all.items.map((item) => item.path)).toEqual(["birthday.png", "Italy 2024/beach.png"]);
    const italy = await searchMediaLibrary(handles.prisma, owner.me.userId, {
      query: "italy BEACH",
    });
    expect(italy.items.map((item) => item.path)).toEqual(["Italy 2024/beach.png"]);
    const before = await searchMediaLibrary(handles.prisma, owner.me.userId, {
      taken_before: "2025-01-01T00:00:00Z",
    });
    expect(before.items.map((item) => item.path)).toEqual(["Italy 2024/beach.png"]);
    expect((await searchMediaLibrary(handles.prisma, other.me.userId, {})).total).toBe(0);

    const artifacts = new LocalArtifactStore(dataDir);
    const assetId = italy.items[0]!.asset_id;
    const imported = await importMediaLibraryAsset(
      { prisma: handles.prisma, artifacts },
      {
        spaceId: owner.me.spaceId,
        userId: owner.me.userId,
        botId: null,
        groupId: null,
        runId: null,
      },
      assetId,
    );
    expect(imported).toMatchObject({ name: "beach.png", mimeType: "image/png", size: PNG.length });
    await expect(
      importMediaLibraryAsset(
        { prisma: handles.prisma, artifacts },
        {
          spaceId: other.me.spaceId,
          userId: other.me.userId,
          botId: null,
          groupId: null,
          runId: null,
        },
        assetId,
      ),
    ).rejects.toBeInstanceOf(MediaLibraryError);

    // Another user can neither resync nor remove the owner's folder.
    expect(
      (await raw(app, other.cookie, "media/library/sync", { sourceId: added.id })).status,
    ).toBe(403);

    // A deleted file leaves the index on the next sync.
    rmSync(path.join(library, "birthday.png"));
    await rpc(app, owner.cookie, "media/library/sync", { sourceId: added.id });
    expect(await waitForSync(owner.cookie, added.id)).toMatchObject({ assetCount: 1 });

    await rpc(app, owner.cookie, "media/library/remove", { sourceId: added.id });
    expect(await rpc(app, owner.cookie, "media/library/list")).toEqual([]);
    expect(await handles.prisma.mediaLibraryAsset.count({ where: { sourceId: added.id } })).toBe(0);
    expect(
      (await raw(app, owner.cookie, "media/library/sync", { sourceId: added.id })).status,
    ).toBe(404);
  });
});

async function signup(app: App, email: string, name: string) {
  const res = await app.request("/api/auth/sign-up/email", {
    method: "POST",
    headers: { "content-type": "application/json", origin: "http://127.0.0.1:5173" },
    body: JSON.stringify({ email, password: "password12", name }),
  });
  if (res.status >= 400) throw new Error(`signup failed ${res.status}: ${await res.text()}`);
  return sessionCookieHeader(res);
}

function raw(app: App, cookie: string, proc: string, body: unknown = {}) {
  return app.request(`/rpc/${proc}`, {
    method: "POST",
    headers: { "content-type": "application/json", cookie, origin: "http://127.0.0.1:5173" },
    body: JSON.stringify({ json: body }),
  });
}

async function rpc<T>(app: App, cookie: string, proc: string, body: unknown = {}): Promise<T> {
  const res = await raw(app, cookie, proc, body);
  const text = await res.text();
  const parsed = JSON.parse(text) as { json?: T; error?: { message?: string } };
  if (res.status >= 400 || parsed.error) {
    throw new Error(`${proc} ${res.status}: ${parsed.error?.message ?? text}`);
  }
  return parsed.json as T;
}