import { describe, expect, test } from "bun:test";
import {
  lstat,
  mkdir,
  mkdtemp,
  readFile,
  rm,
  stat,
  symlink,
  utimes,
  writeFile,
} from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";

import { cleanupExpiredToolOutputs } from "../../src/runtime/opencodeToolOutputCleanup.js";

describe("cleanupExpiredToolOutputs", () => {
  test("removes only expired regular tool output files", async () => {
    const directory = await mkdtemp(join(tmpdir(), "opencode-tool-output-cleanup-"));
    const expired = join(directory, "tool_expired");
    const current = join(directory, "tool_current");
    const unrelated = join(directory, "keep.txt");
    const toolDirectory = join(directory, "tool_directory");
    const toolSymlink = join(directory, "tool_symlink");
    try {
      await Promise.all([
        writeFile(expired, "expired"),
        writeFile(current, "current"),
        writeFile(unrelated, "unrelated"),
        mkdir(toolDirectory),
      ]);
      await symlink(unrelated, toolSymlink);
      const now = Date.now();
      const old = new Date(now - 8 * 24 * 60 * 60 * 1000);
      await utimes(expired, old, old);

      const result = await cleanupExpiredToolOutputs(
        directory,
        7 * 24 * 60 * 60 * 1000,
        now,
      );

      expect(result).toEqual({ removed: 1, scanned: 5 });
      await expect(stat(expired)).rejects.toMatchObject({ code: "ENOENT" });
      expect(await readFile(current, "utf8")).toBe("current");
      expect(await readFile(unrelated, "utf8")).toBe("unrelated");
      expect((await stat(toolDirectory)).isDirectory()).toBe(true);
      expect((await lstat(toolSymlink)).isSymbolicLink()).toBe(true);
    } finally {
      await rm(directory, { force: true, recursive: true });
    }
  });

  test("treats a missing tool output directory as empty", async () => {
    const directory = join(tmpdir(), `missing-tool-output-${crypto.randomUUID()}`);
    await expect(cleanupExpiredToolOutputs(directory, 1_000)).resolves.toEqual({
      removed: 0,
      scanned: 0,
    });
  });
});