/**
 * Webhook payload transforms for OpenClaw skill deployment.
 *
 * Pure functions — no auth, no network calls, no external dependencies.
 */

export type Command = 'skill-install';

interface SkillEntry {
  skill_id?: string;
  skill_slug?: string;
  skill_name?: string;
  repo_url?: string;
  repo_subpath?: string;
  git_ref?: string;
  commit_sha?: string;
}

export function run(command: Command, args: string[]) {
  if (command === 'skill-install') {
    const payload = args[0] ? JSON.parse(args[0]) : {};
    const result = transformSkillInstall(payload);
    console.log(result.message);
    return result;
  }
}

export function transformSkillInstall(payload: Record<string, unknown>) {
  const body = (payload.payload ?? payload) as Record<string, unknown>;
  const skills = body.skills as SkillEntry[] | undefined;

  if (!skills || skills.length === 0) {
    return {
      message: "skill-update webhook received but no `skills` array in payload. Nothing to install.",
    };
  }

  const lines: string[] = [
    `Install/update ${skills.length} skill(s) from git. Execute all steps directly — do not ask questions.`,
    ``,
  ];

  for (const skill of skills) {
    const { repo_url, skill_slug, skill_name, git_ref, repo_subpath } = skill;

    if (!repo_url) {
      lines.push(`⚠️  Skipping skill "${skill_slug ?? "unknown"}" — missing repo_url.`, ``);
      continue;
    }

    const dirName = skill_slug ?? repo_url.split("/").pop()?.replace(/\.git$/, "") ?? "unknown-skill";
    const installPath = `~/clawd/skills/${dirName}`;
    const subpath = repo_subpath ? `/${repo_subpath}` : "";
    const skillDir = repo_subpath ? `${installPath}/${repo_subpath}` : installPath;

    lines.push(
      `── Skill: ${skill_name ?? dirName} (${git_ref ?? "default branch"})`,
      `   Repo:   ${repo_url}`,
      `   Target: ${skillDir}`,
      ``,
      `   Steps:`,
      `   1. If ${installPath} exists: cd ${installPath} && git fetch --tags && git checkout ${git_ref ?? "HEAD"}`,
      `      Otherwise: git clone ${repo_url} ${installPath} && cd ${installPath} && git checkout ${git_ref ?? "HEAD"}`,
      `   2. cd ${skillDir}`,
      `   3. If install.sh exists: bash install.sh`,
      `      Otherwise: npm install (if package.json exists) or skip`,
      `   4. Reply with one line: installed/updated + skill name + version.`,
      ``,
    );
  }

  return { message: lines.join("\n") };
}