import { chmod, mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";

import { Client, InMemoryTransport } from "@modelcontextprotocol/client";
import { expect, it } from "vitest";

import { createServer } from "../../../src/server/createServer.js";
import { createAnalysisExecution } from "../../../src/application/AnalysisProvider.js";
import { ok } from "../../../src/domain/result.js";

const analysis = {
  execute: async () =>
    ok(
      createAnalysisExecution({}, { id: "test", name: "Test", version: null }),
    ),
};

const writeRizin = async (directory: string, output: string): Promise<void> => {
  const executable = join(directory, "rizin");
  await writeFile(executable, `#!/bin/sh\nprintf '%s\\n' '${output}'\n`);
  await chmod(executable, 0o755);
};

it("uses the server-selected environment unless a provider environment overrides it", async () => {
  const directory = await mkdtemp(join(tmpdir(), "rea-reverse-env-"));
  const selectedPath = join(directory, "selected");
  const overridePath = join(directory, "override");
  const artifactPath = join(directory, "sample.bin");
  await Promise.all([mkdir(selectedPath), mkdir(overridePath)]);
  await Promise.all([
    writeRizin(selectedPath, "selected environment"),
    writeRizin(overridePath, "provider override"),
    writeFile(artifactPath, "fixture"),
  ]);

  try {
    for (const scenario of [
      {
        environment: selectedPath,
        expected: "selected environment",
      },
      {
        environment: selectedPath,
        provider: overridePath,
        expected: "provider override",
      },
    ]) {
      const server = createServer(
        { kind: "fixed", analysis },
        {
          environment: { ...process.env, PATH: scenario.environment },
          ...(scenario.provider === undefined
            ? {}
            : {
                providerEnvironment: {
                  ...process.env,
                  PATH: scenario.provider,
                },
              }),
        },
      );
      const client = new Client({ name: "reverse-env-test", version: "1" });
      const [clientTransport, serverTransport] =
        InMemoryTransport.createLinkedPair();
      try {
        await server.connect(serverTransport);
        await client.connect(clientTransport);
        const result = await client.callTool({
          name: "execute_rizin_command",
          arguments: { path: artifactPath, command: "iI" },
        });
        expect(result.isError).not.toBe(true);
        expect(result.structuredContent).toMatchObject({
          raw_result: { stdout: `${scenario.expected}\n` },
        });
      } finally {
        await Promise.all([client.close(), server.close()]);
      }
    }
  } finally {
    await rm(directory, { recursive: true, force: true });
  }
});