// PR wrapper tests cover maintainer helper command delegation.
import { spawnSync } from "node:child_process";
import { chmodSync, mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { describe, expect, it } from "vitest";

function readScript(path: string): string {
  return readFileSync(path, "utf8");
}

describe("scripts/pr wrappers", () => {
  it("keeps the main PR helper usage and command table aligned", () => {
    const script = readScript("scripts/pr");

    expect(script).toContain("export NO_COLOR=1");
    expect(script).toContain("unset COLORTERM");
    expect(script).toContain('source "$script_parent_dir/lib/plain-gh.sh"');
    expect(script).toContain("OPENCLAW_GH_BIN=");
    expect(script).toContain("gh_plain");
    expect(script).toContain("scripts/pr review-init <PR>");
    expect(script).toContain("scripts/pr prepare-run <PR>");
    expect(script).toContain("scripts/pr merge-run <PR>");
    expect(script).toContain('review_init "$pr"');
    expect(script).toContain('prepare_run "$pr"');
    expect(script).toContain('merge_run "$pr"');
  });

  it("keeps merge wrapper modes delegated to the main PR helper", () => {
    const script = readScript("scripts/pr-merge");

    expect(script).toContain("scripts/pr-merge <PR>");
    expect(script).toContain('exec "$base" merge-verify "$1"');
    expect(script).toContain('exec "$base" merge-verify "$pr"');
    expect(script).toContain('exec "$base" merge-run "$pr"');
  });

  it("defaults to squash and allows commit-preserving merge methods", () => {
    const script = readScript("scripts/pr-lib/merge.sh");

    expect(script).toContain("OPENCLAW_PR_MERGE_METHOD:-squash");
    expect(script).toContain("--squash");
    expect(script).toContain("--merge");
    expect(script).toContain("--rebase");
    expect(script).toContain('echo "Merged via $merge_label."');
  });

  it("keeps prepare wrapper modes delegated to the main PR helper", () => {
    const script = readScript("scripts/pr-prepare");

    expect(script).toContain("scripts/pr-prepare <init|validate-commit|gates|push|run> <PR>");
    for (const mode of ["init", "validate-commit", "gates", "push", "run"]) {
      expect(script).toContain(`${mode})`);
    }
    expect(script).toContain('exec "$base" prepare-init "$pr"');
    expect(script).toContain('exec "$base" prepare-validate-commit "$pr"');
    expect(script).toContain('exec "$base" prepare-gates "$pr"');
    expect(script).toContain('exec "$base" prepare-push "$pr"');
    expect(script).toContain('exec "$base" prepare-run "$pr"');
  });

  it("keeps review wrapper delegated to review-init", () => {
    const script = readScript("scripts/pr-review");

    expect(script).toContain('base="$script_dir/pr"');
    expect(script).toContain('exec "$base" review-init "$@"');
  });

  it("refuses to substitute a different canonical wrapper implementation", () => {
    const dir = mkdtempSync(join(tmpdir(), "openclaw-pr-wrapper-revision-"));
    const repo = join(dir, "repo");
    const linked = join(dir, "linked");
    mkdirSync(join(repo, "scripts", "lib"), { recursive: true });
    mkdirSync(join(repo, "scripts", "pr-lib"), { recursive: true });
    writeFileSync(join(repo, "scripts", "pr"), readScript("scripts/pr"));
    writeFileSync(join(repo, "scripts", "lib", "plain-gh.sh"), "# canonical\n");
    writeFileSync(join(repo, "scripts", "pr-lib", "merge.sh"), "# canonical\n");
    chmodSync(join(repo, "scripts", "pr"), 0o755);

    const git = (cwd: string, args: string[]) =>
      spawnSync("git", args, { cwd, encoding: "utf8", stdio: "pipe" });
    expect(git(repo, ["init", "-b", "main"]).status).toBe(0);
    expect(git(repo, ["config", "user.name", "OpenClaw Test"]).status).toBe(0);
    expect(git(repo, ["config", "user.email", "test@example.invalid"]).status).toBe(0);
    expect(git(repo, ["add", "scripts"]).status).toBe(0);
    expect(git(repo, ["commit", "-m", "test: canonical wrapper"]).status).toBe(0);
    expect(git(repo, ["worktree", "add", "-b", "feature", linked]).status).toBe(0);

    writeFileSync(join(linked, "scripts", "pr-lib", "merge.sh"), "# dirty linked\n");
    const dirtyLinkedResult = spawnSync(join(linked, "scripts", "pr"), ["ls"], {
      cwd: linked,
      encoding: "utf8",
    });
    expect(dirtyLinkedResult.status).toBe(1);
    expect(dirtyLinkedResult.stderr).toContain("scripts/pr wrapper files have uncommitted changes");
    expect(git(linked, ["restore", "scripts/pr-lib/merge.sh"]).status).toBe(0);

    // A dirty canonical checkout no longer blocks a linked worktree whose
    // committed wrapper matches the origin/main trust anchor; without that
    // anchor it must still refuse.
    writeFileSync(join(repo, "scripts", "pr-lib", "merge.sh"), "# dirty canonical\n");
    const dirtyResult = spawnSync(join(linked, "scripts", "pr"), ["ls"], {
      cwd: linked,
      encoding: "utf8",
    });
    expect(dirtyResult.status).toBe(1);
    expect(dirtyResult.stderr).toContain(
      "scripts/pr implementation differs between this worktree and the canonical checkout",
    );
    expect(git(repo, ["restore", "scripts/pr-lib/merge.sh"]).status).toBe(0);

    writeFileSync(join(linked, "scripts", "pr-lib", "merge.sh"), "# linked\n");
    expect(git(linked, ["add", "scripts/pr-lib/merge.sh"]).status).toBe(0);
    expect(git(linked, ["commit", "-m", "test: linked wrapper"]).status).toBe(0);

    const result = spawnSync(join(linked, "scripts", "pr"), ["ls"], {
      cwd: linked,
      encoding: "utf8",
    });
    rmSync(dir, { recursive: true, force: true });

    expect(result.status).toBe(1);
    expect(result.stderr).toContain(
      "scripts/pr implementation differs between this worktree and the canonical checkout",
    );
  });

  it("runs the local wrapper when it matches origin/main and the canonical checkout is parked elsewhere", () => {
    const dir = mkdtempSync(join(tmpdir(), "openclaw-pr-wrapper-anchor-"));
    const repo = join(dir, "repo");
    const linked = join(dir, "linked");
    mkdirSync(join(repo, "scripts", "lib"), { recursive: true });
    mkdirSync(join(repo, "scripts", "pr-lib"), { recursive: true });
    writeFileSync(join(repo, "scripts", "pr"), readScript("scripts/pr"));
    writeFileSync(join(repo, "scripts", "lib", "plain-gh.sh"), "# canonical\n");
    writeFileSync(join(repo, "scripts", "pr-lib", "merge.sh"), "# canonical\n");
    chmodSync(join(repo, "scripts", "pr"), 0o755);

    const git = (cwd: string, args: string[]) =>
      spawnSync("git", args, { cwd, encoding: "utf8", stdio: "pipe" });
    expect(git(repo, ["init", "-b", "main"]).status).toBe(0);
    expect(git(repo, ["config", "user.name", "OpenClaw Test"]).status).toBe(0);
    expect(git(repo, ["config", "user.email", "test@example.invalid"]).status).toBe(0);
    expect(git(repo, ["add", "scripts"]).status).toBe(0);
    expect(git(repo, ["commit", "-m", "test: canonical wrapper"]).status).toBe(0);
    // The linked worktree keeps main's wrapper; origin/main anchors trust.
    expect(git(repo, ["update-ref", "refs/remotes/origin/main", "main"]).status).toBe(0);
    expect(git(repo, ["worktree", "add", "-b", "feature", linked]).status).toBe(0);

    // Park the canonical checkout on a release-style branch with a different
    // wrapper revision, the exact contention that used to block landings.
    expect(git(repo, ["switch", "-c", "release/test-train"]).status).toBe(0);
    writeFileSync(join(repo, "scripts", "pr-lib", "merge.sh"), "# release drift\n");
    expect(git(repo, ["add", "scripts/pr-lib/merge.sh"]).status).toBe(0);
    expect(git(repo, ["commit", "-m", "test: release drift"]).status).toBe(0);

    const result = spawnSync(join(linked, "scripts", "pr"), ["ls"], {
      cwd: linked,
      encoding: "utf8",
    });

    expect(result.stderr).not.toContain("Refusing to silently substitute");
    expect(result.stderr).not.toContain("scripts/pr implementation differs");
    expect(result.stderr).not.toContain("uncommitted changes");

    // A local branch literally named "origin/main" must not spoof the trust
    // anchor: only the remote-tracking ref counts.
    expect(git(repo, ["update-ref", "-d", "refs/remotes/origin/main"]).status).toBe(0);
    expect(git(repo, ["update-ref", "refs/heads/origin/main", "main"]).status).toBe(0);
    const spoofed = spawnSync(join(linked, "scripts", "pr"), ["ls"], {
      cwd: linked,
      encoding: "utf8",
    });
    rmSync(dir, { recursive: true, force: true });

    expect(spoofed.status).toBe(1);
    expect(spoofed.stderr).toContain(
      "scripts/pr implementation differs between this worktree and the canonical checkout",
    );
  });

  it("verifies local GitHub auth through GraphQL when REST quota is unavailable", () => {
    const dir = mkdtempSync(join(tmpdir(), "openclaw-pr-auth-"));
    const gh = join(dir, "gh");
    writeFileSync(
      gh,
      `#!/bin/sh
if [ "$1" = "api" ] && [ "$2" = "graphql" ]; then
  printf 'monalisa\\n'
  exit 0
fi
exit 1
`,
    );
    chmodSync(gh, 0o755);

    const result = spawnSync(
      "bash",
      [
        "-c",
        "source scripts/lib/plain-gh.sh; source scripts/pr-lib/worktree.sh; ensure_gh_api_auth",
      ],
      {
        cwd: process.cwd(),
        env: { ...process.env, OPENCLAW_GH_BIN: gh },
        encoding: "utf8",
      },
    );
    rmSync(dir, { recursive: true, force: true });

    expect(result.status).toBe(0);
    expect(result.stderr).toBe("");
  });
});