import fs from "node:fs/promises";
import path from "node:path";
import { describe, expect, it, vi } from "vitest";
import { withTempDir } from "../test-helpers/temp-dir.js";
import {
  isInterpreterLikeSafeBin,
  listInterpreterLikeSafeBins,
  resolveExecSafeBinRuntimePolicy,
  resolveMergedSafeBinProfileFixtures,
} from "./exec-safe-bin-runtime-policy.js";

describe("exec safe-bin runtime policy", () => {
  const interpreterCases: Array<{ bin: string; expected: boolean }> = [
    { bin: "python3", expected: true },
    { bin: "python3.12", expected: true },
    { bin: " C:\\Tools\\Python3.EXE ", expected: true },
    { bin: "node", expected: true },
    { bin: "node20", expected: true },
    { bin: "/usr/local/bin/node20", expected: true },
    { bin: "awk", expected: true },
    { bin: "/opt/homebrew/bin/gawk", expected: true },
    { bin: "mawk", expected: true },
    { bin: "nawk", expected: true },
    { bin: "sed", expected: true },
    { bin: "gsed", expected: true },
    { bin: "ruby3.2", expected: true },
    { bin: "bash", expected: true },
    { bin: "busybox", expected: true },
    { bin: "toybox", expected: true },
    { bin: "myfilter", expected: false },
    { bin: "jq", expected: false },
  ];

  for (const testCase of interpreterCases) {
    it(`classifies interpreter-like safe bin '${testCase.bin}'`, () => {
      expect(isInterpreterLikeSafeBin(testCase.bin)).toBe(testCase.expected);
    });
  }

  it("lists interpreter-like bins from a mixed set", () => {
    expect(
      listInterpreterLikeSafeBins([
        "jq",
        " C:\\Tools\\Python3.EXE ",
        "myfilter",
        "busybox",
        "toybox",
        "/usr/bin/node",
        "/opt/homebrew/bin/gawk",
      ]),
    ).toEqual(["busybox", "gawk", "node", "python3", "toybox"]);
  });

  it("merges and normalizes safe-bin profile fixtures", () => {
    const merged = resolveMergedSafeBinProfileFixtures({
      global: {
        safeBinProfiles: {
          " MyFilter ": {
            deniedFlags: ["--file", " --file ", ""],
          },
        },
      },
      local: {
        safeBinProfiles: {
          myfilter: {
            maxPositional: 0,
          },
        },
      },
    });
    expect(merged).toEqual({
      myfilter: {
        maxPositional: 0,
      },
    });
  });

  it("computes unprofiled interpreter entries separately from custom profiled bins", () => {
    const policy = resolveExecSafeBinRuntimePolicy({
      local: {
        safeBins: ["python3", "myfilter"],
        safeBinProfiles: {
          myfilter: { maxPositional: 0 },
        },
      },
    });

    expect(policy.safeBins.has("python3")).toBe(true);
    expect(policy.safeBins.has("myfilter")).toBe(true);
    expect(policy.unprofiledSafeBins).toEqual(["python3"]);
    expect(policy.unprofiledInterpreterSafeBins).toEqual(["python3"]);
  });

  it("prefers local safe bins over global ones when both are configured", () => {
    const policy = resolveExecSafeBinRuntimePolicy({
      global: {
        safeBins: ["python3", "jq"],
      },
      local: {
        safeBins: ["sort"],
      },
    });

    expect([...policy.safeBins]).toEqual(["sort"]);
  });

  it("merges explicit safe-bin trusted dirs from global and local config", () => {
    const customDir = path.join(path.sep, "custom", "bin");
    const agentDir = path.join(path.sep, "agent", "bin");
    const policy = resolveExecSafeBinRuntimePolicy({
      global: {
        safeBinTrustedDirs: [` ${customDir} `, customDir],
      },
      local: {
        safeBinTrustedDirs: [agentDir],
      },
    });

    expect(policy.trustedSafeBinDirs.has(path.resolve(customDir))).toBe(true);
    expect(policy.trustedSafeBinDirs.has(path.resolve(agentDir))).toBe(true);
  });

  it("does not trust package-manager bin dirs unless explicitly configured", () => {
    const defaultPolicy = resolveExecSafeBinRuntimePolicy({});
    expect(defaultPolicy.trustedSafeBinDirs.has(path.resolve("/opt/homebrew/bin"))).toBe(false);
    expect(defaultPolicy.trustedSafeBinDirs.has(path.resolve("/usr/local/bin"))).toBe(false);

    const optedIn = resolveExecSafeBinRuntimePolicy({
      global: {
        safeBinTrustedDirs: ["/opt/homebrew/bin", "/usr/local/bin"],
      },
    });
    expect(optedIn.trustedSafeBinDirs.has(path.resolve("/opt/homebrew/bin"))).toBe(true);
    expect(optedIn.trustedSafeBinDirs.has(path.resolve("/usr/local/bin"))).toBe(true);
  });

  it("emits runtime warning when explicitly trusted dir is writable", async () => {
    if (process.platform === "win32") {
      return;
    }
    await withTempDir({ prefix: "openclaw-safe-bin-runtime-" }, async (dir) => {
      try {
        await fs.chmod(dir, 0o777);
        const onWarning = vi.fn();
        const policy = resolveExecSafeBinRuntimePolicy({
          global: {
            safeBinTrustedDirs: [dir],
          },
          onWarning,
        });

        expect(policy.writableTrustedSafeBinDirs).toEqual([
          {
            dir: path.resolve(dir),
            groupWritable: true,
            worldWritable: true,
          },
        ]);
        expect(onWarning).toHaveBeenCalledWith(expect.stringContaining(path.resolve(dir)));
        expect(onWarning).toHaveBeenCalledWith(expect.stringContaining("world-writable"));
      } finally {
        await fs.chmod(dir, 0o755).catch(() => undefined);
      }
    });
  });
});