import type { APIRoute } from 'astro';
import { getSkill } from '../../lib/skills';
import { isPowerShell } from '../../lib/sync';

/** Backward compat: /<slug>/i — installs skill to .claude/skills/ */
export const GET: APIRoute = async ({ params, url, request }) => {
  const { slug } = params;
  const skill = await getSkill(slug!);
  if (!skill) {
    return new Response('Skill not found', { status: 404 });
  }

  const origin = url.origin;
  const ps = isPowerShell(request);

  const script = ps
    ? [
        '$ErrorActionPreference = "Stop"',
        '$Dir = ".claude\\skills"',
        'New-Item -ItemType Directory -Force -Path $Dir | Out-Null',
        `Invoke-WebRequest -Uri "${origin}/skills/${slug}" -OutFile (Join-Path $Dir "${slug}.md")`,
        `Write-Host "✓ Installed ${skill.name} to $Dir\\${slug}.md"`,
        '',
      ].join('\n')
    : [
        '#!/usr/bin/env bash',
        'set -euo pipefail',
        'mkdir -p .claude/skills',
        `curl -fsSL "${origin}/skills/${slug}" -o ".claude/skills/${slug}.md"`,
        `echo "✓ Installed ${skill.name} to .claude/skills/${slug}.md"`,
        '',
      ].join('\n');

  return new Response(script, {
    headers: { 'Content-Type': 'text/plain; charset=utf-8' },
  });
};