import { describe, expect, test } from "bun:test";
import { mkdtemp, readdir, rm } from "fs/promises";
import { join } from "path";
import { tmpdir } from "os";
import { generateToken } from "../../auth";
import * as clientManager from "../../clientManager";
import {
  createUser,
  deleteUser,
  getUserById,
  setUserClientAccessScope,
  setUserFeaturePermission,
} from "../../users";
import { handleFileDownloadRoutes } from "./file-download-routes";

const PASSWORD = "Aa1!RouteUploadTestPass123";

function makeRouteDeps(dataDir: string) {
  return {
    DATA_DIR: dataDir,
    secureHeaders: (_contentType?: string) => ({}),
    sanitizeOutputName: (name: string) => {
      const cleaned = (name || "").replace(/[^A-Za-z0-9._-]/g, "");
      if (!cleaned) throw new Error("invalid filename");
      return cleaned;
    },
    pendingHttpDownloads: new Map<string, any>(),
    downloadIntents: new Map<string, any>(),
  };
}

const mockServer = {
  requestIP: () => ({ address: "127.0.0.1" }),
};

async function createAdminToken() {
  const username = `u_${Date.now().toString(36)}_${Math.floor(Math.random() * 1e6).toString(36)}`;
  const created = await createUser(username, PASSWORD, "admin", "test");
  expect(created.success).toBe(true);
  expect(typeof created.userId).toBe("number");

  const user = getUserById(created.userId!);
  expect(user).not.toBeNull();

  const token = await generateToken(user!);
  return {
    userId: created.userId!,
    token,
  };
}

async function createTempDataDir(): Promise<string> {
  return mkdtemp(join(tmpdir(), "overlord-upload-route-test-"));
}

async function removeTempDataDir(dir: string): Promise<void> {
  await rm(dir, { recursive: true, force: true }).catch(() => {});
}

describe("file upload route flow", () => {
  test("stages and serves one-time upload payload for matching client", async () => {
    const auth = await createAdminToken();
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();

    const deps = makeRouteDeps(dataDir);
    const payload = new Uint8Array(3 * 1024 * 1024 + 123);
    crypto.getRandomValues(payload.subarray(0, Math.min(payload.length, 65536)));

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    const prevDisableAgentAuth = process.env.OVERLORD_DISABLE_AGENT_AUTH;
    process.env.OVERLORD_DISABLE_AGENT_AUTH = "true";

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const requestRes = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\big.iso",
            fileName: "big.iso",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );

      expect(requestRes).not.toBeNull();
      expect(requestRes!.status).toBe(200);
      const requestJson = await requestRes!.json() as any;
      expect(requestJson.ok).toBe(true);
      expect(typeof requestJson.uploadUrl).toBe("string");

      const stageUrl = new URL(`https://localhost${requestJson.uploadUrl}`);
      const stageRes = await handleFileDownloadRoutes(
        new Request(stageUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/octet-stream",
            Authorization: `Bearer ${auth.token}`,
          },
          body: payload,
        }),
        stageUrl,
        mockServer,
        deps,
      );

      expect(stageRes).not.toBeNull();
      expect(stageRes!.status).toBe(200);
      const stageJson = await stageRes!.json() as any;
      expect(stageJson.ok).toBe(true);
      expect(stageJson.size).toBe(payload.length);
      expect(typeof stageJson.pullUrl).toBe("string");
      expect(stageJson.pullUrl.startsWith("/api/file/upload/pull/")).toBe(true);
      expect(stageJson.agentNotified).toBe(false);
      expect(stageJson.agentCommandId).toBeNull();

      const pullUrl = new URL(stageJson.pullUrl, "https://localhost");
      const pullRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: {
            "x-overlord-client-id": clientId,
          },
        }),
        pullUrl,
        mockServer,
        deps,
      );

      expect(pullRes).not.toBeNull();
      expect(pullRes!.status).toBe(200);
      const pulled = new Uint8Array(await pullRes!.arrayBuffer());
      expect(pulled.length).toBe(payload.length);
      expect(pulled[0]).toBe(payload[0]);
      expect(pulled[pulled.length - 1]).toBe(payload[payload.length - 1]);

      const uploadDir = join(dataDir, "uploads");
      const uploadEntries = await readdir(uploadDir).catch(() => [] as string[]);
      expect(uploadEntries.filter((name) => name.endsWith(".bin")).length).toBe(0);

      const pullAgainRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: {
            "x-overlord-client-id": clientId,
          },
        }),
        pullUrl,
        mockServer,
        deps,
      );
      expect(pullAgainRes).not.toBeNull();
      expect(pullAgainRes!.status).toBe(404);
    } finally {
      if (prevDisableAgentAuth === undefined) {
        delete process.env.OVERLORD_DISABLE_AGENT_AUTH;
      } else {
        process.env.OVERLORD_DISABLE_AGENT_AUTH = prevDisableAgentAuth;
      }
      clientManager.deleteClient(clientId);
      const deleted = deleteUser(auth.userId);
      expect(deleted.success).toBe(true);
      await removeTempDataDir(dataDir);
    }
  });

  test("rejects pull when client id does not match", async () => {
    const auth = await createAdminToken();
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);
    const payload = new TextEncoder().encode("hello");

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    const prevDisableAgentAuth = process.env.OVERLORD_DISABLE_AGENT_AUTH;
    process.env.OVERLORD_DISABLE_AGENT_AUTH = "true";

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const requestRes = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\small.bin",
            fileName: "small.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );
      const requestJson = await requestRes!.json() as any;

      const stageUrl = new URL(`https://localhost${requestJson.uploadUrl}`);
      const stageRes = await handleFileDownloadRoutes(
        new Request(stageUrl, {
          method: "PUT",
          headers: {
            Authorization: `Bearer ${auth.token}`,
          },
          body: payload,
        }),
        stageUrl,
        mockServer,
        deps,
      );
      const stageJson = await stageRes!.json() as any;

      const pullUrl = new URL(stageJson.pullUrl, "https://localhost");
      const badPullRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: {
            "x-overlord-client-id": "different-client",
          },
        }),
        pullUrl,
        mockServer,
        deps,
      );

      expect(badPullRes).not.toBeNull();
      expect(badPullRes!.status).toBe(403);
    } finally {
      if (prevDisableAgentAuth === undefined) {
        delete process.env.OVERLORD_DISABLE_AGENT_AUTH;
      } else {
        process.env.OVERLORD_DISABLE_AGENT_AUTH = prevDisableAgentAuth;
      }
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("keeps staged upload payload available for agent range retry after interrupted pull", async () => {
    const auth = await createAdminToken();
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);
    const payload = new Uint8Array(1024 * 1024 + 17);
    crypto.getRandomValues(payload.subarray(0, Math.min(payload.length, 65536)));

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    const prevDisableAgentAuth = process.env.OVERLORD_DISABLE_AGENT_AUTH;
    process.env.OVERLORD_DISABLE_AGENT_AUTH = "true";

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const requestRes = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\retry.bin",
            fileName: "retry.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );
      const requestJson = await requestRes!.json() as any;

      const stageUrl = new URL(`https://localhost${requestJson.uploadUrl}`);
      const stageRes = await handleFileDownloadRoutes(
        new Request(stageUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/octet-stream",
            Authorization: `Bearer ${auth.token}`,
          },
          body: payload,
        }),
        stageUrl,
        mockServer,
        deps,
      );
      const stageJson = await stageRes!.json() as any;
      const pullUrl = new URL(stageJson.pullUrl, "https://localhost");

      const firstPullRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: { "x-overlord-client-id": clientId },
        }),
        pullUrl,
        mockServer,
        deps,
      );
      expect(firstPullRes).not.toBeNull();
      expect(firstPullRes!.status).toBe(200);
      const reader = firstPullRes!.body!.getReader();
      const firstRead = await reader.read();
      expect(firstRead.done).toBe(false);
      const firstChunk = firstRead.value!;
      expect(firstChunk.byteLength).toBeGreaterThan(0);
      await reader.cancel();

      const retryStart = firstChunk.byteLength;
      const retryRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: {
            "x-overlord-client-id": clientId,
            Range: `bytes=${retryStart}-`,
          },
        }),
        pullUrl,
        mockServer,
        deps,
      );
      expect(retryRes).not.toBeNull();
      expect(retryRes!.status).toBe(206);
      expect(retryRes!.headers.get("Content-Range")).toBe(
        `bytes ${retryStart}-${payload.length - 1}/${payload.length}`,
      );
      const retried = new Uint8Array(await retryRes!.arrayBuffer());
      expect(retried.length).toBe(payload.length - retryStart);
      expect(retried[0]).toBe(payload[retryStart]);
      expect(retried[retried.length - 1]).toBe(payload[payload.length - 1]);

      const pullAgainRes = await handleFileDownloadRoutes(
        new Request(pullUrl, {
          method: "GET",
          headers: { "x-overlord-client-id": clientId },
        }),
        pullUrl,
        mockServer,
        deps,
      );
      expect(pullAgainRes).not.toBeNull();
      expect(pullAgainRes!.status).toBe(404);
    } finally {
      if (prevDisableAgentAuth === undefined) {
        delete process.env.OVERLORD_DISABLE_AGENT_AUTH;
      } else {
        process.env.OVERLORD_DISABLE_AGENT_AUTH = prevDisableAgentAuth;
      }
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });
});

async function createOperatorToken(opts: { fileBrowserAllowed: boolean; clientScope?: "none" | "all" } = { fileBrowserAllowed: true, clientScope: "all" }) {
  const username = `op_${Date.now().toString(36)}_${Math.floor(Math.random() * 1e6).toString(36)}`;
  const created = await createUser(username, PASSWORD, "operator", "test");
  expect(created.success).toBe(true);
  expect(typeof created.userId).toBe("number");

  const userId = created.userId!;
  setUserClientAccessScope(userId, opts.clientScope ?? "all");
  setUserFeaturePermission(userId, "file_browser", opts.fileBrowserAllowed);

  const user = getUserById(userId);
  expect(user).not.toBeNull();

  const token = await generateToken(user!);
  return { userId, token };
}

describe("file route feature_browser enforcement", () => {
  test("upload request returns 403 when file_browser is denied", async () => {
    const auth = await createOperatorToken({ fileBrowserAllowed: false });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const res = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\big.iso",
            fileName: "big.iso",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );

      expect(res).not.toBeNull();
      expect(res!.status).toBe(403);
      expect(await res!.text()).toContain("feature access denied");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("download request returns 403 when file_browser is denied", async () => {
    const auth = await createOperatorToken({ fileBrowserAllowed: false });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/download/request");
      const res = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\secret\\data.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );

      expect(res).not.toBeNull();
      expect(res!.status).toBe(403);
      expect(await res!.text()).toContain("feature access denied");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("client_access check still beats feature check when client access is missing", async () => {
    // If both are denied, client access fires first — guards against misordered checks.
    const auth = await createOperatorToken({ fileBrowserAllowed: false, clientScope: "none" });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const res = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\big.iso",
            fileName: "big.iso",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );

      expect(res).not.toBeNull();
      expect(res!.status).toBe(403);
      expect(await res!.text()).toContain("do not have access to this client");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("upload stage PUT returns 403 when file_browser is revoked after intent creation", async () => {
    const auth = await createOperatorToken({ fileBrowserAllowed: true });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const requestRes = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\small.bin",
            fileName: "small.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );
      expect(requestRes!.status).toBe(200);
      const requestJson = (await requestRes!.json()) as any;

      // Revoke after the intent has been created.
      setUserFeaturePermission(auth.userId, "file_browser", false);

      const stageUrl = new URL(`https://localhost${requestJson.uploadUrl}`);
      const stageRes = await handleFileDownloadRoutes(
        new Request(stageUrl, {
          method: "PUT",
          headers: { Authorization: `Bearer ${auth.token}` },
          body: new TextEncoder().encode("hello"),
        }),
        stageUrl,
        mockServer,
        deps,
      );

      expect(stageRes).not.toBeNull();
      expect(stageRes!.status).toBe(403);
      expect(await stageRes!.text()).toContain("feature access denied");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("download serve returns 403 when file_browser is revoked after intent creation", async () => {
    const auth = await createOperatorToken({ fileBrowserAllowed: true });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/download/request");
      const requestRes = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\file.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );
      expect(requestRes!.status).toBe(200);
      const requestJson = (await requestRes!.json()) as any;
      expect(typeof requestJson.downloadUrl).toBe("string");

      // Revoke after the intent has been created.
      setUserFeaturePermission(auth.userId, "file_browser", false);

      const downloadUrl = new URL(`https://localhost${requestJson.downloadUrl}`);
      const downloadRes = await handleFileDownloadRoutes(
        new Request(downloadUrl, {
          method: "GET",
          headers: { Authorization: `Bearer ${auth.token}` },
        }),
        downloadUrl,
        mockServer,
        deps,
      );

      expect(downloadRes).not.toBeNull();
      expect(downloadRes!.status).toBe(403);
      expect(await downloadRes!.text()).toContain("feature access denied");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });

  test("upload request succeeds for operator with file_browser allowed (positive control)", async () => {
    const auth = await createOperatorToken({ fileBrowserAllowed: true });
    const clientId = `client-${Date.now().toString(36)}`;
    const dataDir = await createTempDataDir();
    const deps = makeRouteDeps(dataDir);

    clientManager.addClient(clientId, {
      id: clientId,
      lastSeen: Date.now(),
      role: "client",
      ws: { send: () => {} },
    });

    try {
      const requestUrl = new URL("https://localhost/api/file/upload/request");
      const res = await handleFileDownloadRoutes(
        new Request(requestUrl, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${auth.token}`,
          },
          body: JSON.stringify({
            clientId,
            path: "C:\\Games\\ok.bin",
            fileName: "ok.bin",
          }),
        }),
        requestUrl,
        mockServer,
        deps,
      );

      expect(res).not.toBeNull();
      expect(res!.status).toBe(200);
      const body = (await res!.json()) as any;
      expect(body.ok).toBe(true);
      expect(typeof body.uploadUrl).toBe("string");
    } finally {
      clientManager.deleteClient(clientId);
      deleteUser(auth.userId);
      await removeTempDataDir(dataDir);
    }
  });
});