import assert from "node:assert/strict";
import test from "node:test";
import os from "node:os";
import path from "node:path";
import { mkdtemp, rm, writeFile } from "node:fs/promises";
import {
  getClawBackendConfigForTesting,
  getClawBackendAvailabilityForTesting,
  isClawBackendConfiguredForTesting,
} from "../src/lib/execution/backends/claw-config.ts";

function snapshotEnv() {
  return {
    BOSS_CLAW_ENABLED: process.env.BOSS_CLAW_ENABLED,
    BOSS_CLAW_COMMAND: process.env.BOSS_CLAW_COMMAND,
    BOSS_CLAW_ARGS: process.env.BOSS_CLAW_ARGS,
    BOSS_CLAW_WORKDIR: process.env.BOSS_CLAW_WORKDIR,
    BOSS_CLAW_TIMEOUT_MS: process.env.BOSS_CLAW_TIMEOUT_MS,
    BOSS_CLAW_DEFAULT_MODEL: process.env.BOSS_CLAW_DEFAULT_MODEL,
  };
}

function restoreEnv(snapshot: ReturnType<typeof snapshotEnv>) {
  process.env.BOSS_CLAW_ENABLED = snapshot.BOSS_CLAW_ENABLED;
  process.env.BOSS_CLAW_COMMAND = snapshot.BOSS_CLAW_COMMAND;
  process.env.BOSS_CLAW_ARGS = snapshot.BOSS_CLAW_ARGS;
  process.env.BOSS_CLAW_WORKDIR = snapshot.BOSS_CLAW_WORKDIR;
  process.env.BOSS_CLAW_TIMEOUT_MS = snapshot.BOSS_CLAW_TIMEOUT_MS;
  process.env.BOSS_CLAW_DEFAULT_MODEL = snapshot.BOSS_CLAW_DEFAULT_MODEL;
}

test("Claw backend 在未配置时默认关闭", () => {
  const previous = snapshotEnv();

  delete process.env.BOSS_CLAW_ENABLED;
  delete process.env.BOSS_CLAW_COMMAND;
  delete process.env.BOSS_CLAW_ARGS;
  delete process.env.BOSS_CLAW_WORKDIR;
  delete process.env.BOSS_CLAW_TIMEOUT_MS;
  delete process.env.BOSS_CLAW_DEFAULT_MODEL;

  const config = getClawBackendConfigForTesting();

  assert.equal(config.enabled, false);
  assert.equal(isClawBackendConfiguredForTesting(config), false);

  restoreEnv(previous);
});

test("Claw backend 在配置完整时返回 command、args 和 timeout", () => {
  const previous = snapshotEnv();

  process.env.BOSS_CLAW_ENABLED = "true";
  process.env.BOSS_CLAW_COMMAND = "claw";
  process.env.BOSS_CLAW_ARGS = "run --json";
  process.env.BOSS_CLAW_WORKDIR = "/tmp/claw";
  process.env.BOSS_CLAW_TIMEOUT_MS = "45000";

  const config = getClawBackendConfigForTesting();

  assert.equal(config.enabled, true);
  assert.equal(config.command, "claw");
  assert.deepEqual(config.args, ["run", "--json"]);
  assert.equal(config.cwd, "/tmp/claw");
  assert.equal(config.timeoutMs, 45000);
  assert.equal(isClawBackendConfiguredForTesting(config), true);

  restoreEnv(previous);
});

test("Claw backend availability 会在可执行命令和脚本都存在时返回 ready", async () => {
  const previous = snapshotEnv();
  const tempDir = await mkdtemp(path.join(os.tmpdir(), "boss-claw-config-"));
  const scriptPath = path.join(tempDir, "claw-smoke.mjs");
  await writeFile(scriptPath, "console.log('ok');\n", "utf8");

  process.env.BOSS_CLAW_ENABLED = "true";
  process.env.BOSS_CLAW_COMMAND = process.execPath;
  process.env.BOSS_CLAW_ARGS = scriptPath;
  process.env.BOSS_CLAW_WORKDIR = tempDir;

  try {
    const availability = await getClawBackendAvailabilityForTesting();

    assert.equal(availability.status, "ready");
    assert.equal(availability.selectable, true);
    assert.equal(availability.reason, "ready");
  } finally {
    restoreEnv(previous);
    await rm(tempDir, { recursive: true, force: true });
  }
});

test("Claw backend availability 会在脚本参数不存在时返回不可选", async () => {
  const previous = snapshotEnv();
  const tempDir = await mkdtemp(path.join(os.tmpdir(), "boss-claw-config-"));
  const missingScript = path.join(tempDir, "missing-claw-script.mjs");

  process.env.BOSS_CLAW_ENABLED = "true";
  process.env.BOSS_CLAW_COMMAND = process.execPath;
  process.env.BOSS_CLAW_ARGS = missingScript;
  process.env.BOSS_CLAW_WORKDIR = tempDir;

  try {
    const availability = await getClawBackendAvailabilityForTesting();

    assert.equal(availability.status, "misconfigured");
    assert.equal(availability.selectable, false);
    assert.equal(availability.reason, "script_not_found");
  } finally {
    restoreEnv(previous);
    await rm(tempDir, { recursive: true, force: true });
  }
});