// Framebrick Agent Skills installer (https://framebrick.co/install). Read it before you run it: it only downloads 3 SKILL.md files.
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");
const crypto = require("node:crypto");

const SITE = process.env.FRAMEBRICK_SITE || "https://framebrick.co"; // FRAMEBRICK_SITE: test against another copy of the site
const SKILLS = ["framebrick","framebrick-blocks","framebrick-templates"];
const args = process.argv.slice(2);
const flag = (name) => args.includes(name);
const value = (name) => (args.includes(name) ? args[args.indexOf(name) + 1] : undefined);

if (flag("--help") || flag("-h")) {
  console.log("Usage: curl -fsSL " + SITE + "/install | node - [--project | --dir <folder>] [--only name,name] [--dry-run]");
  console.log("Skills: " + SKILLS.join(", "));
  console.log("Default folder: ~/.claude/skills (Claude Code). --project writes ./.claude/skills. --dir writes any folder an agent reads skills from.");
  process.exit(0);
}

const root = value("--dir") ? path.resolve(value("--dir")) : flag("--project") ? path.resolve(".claude", "skills") : path.join(os.homedir(), ".claude", "skills");
const only = value("--only") ? value("--only").split(",").map((s) => s.trim()) : SKILLS;
const unknown = only.filter((name) => !SKILLS.includes(name));
if (unknown.length) {
  console.error("Unknown skill: " + unknown.join(", ") + ". Available: " + SKILLS.join(", "));
  process.exit(1);
}
const dry = flag("--dry-run");

(async () => {
  console.log((dry ? "Dry run: " : "") + "Installing " + only.length + " Framebrick skill(s) into " + root);
  for (const name of only) {
    const response = await fetch(SITE + "/skills/" + name + "/SKILL.md");
    if (!response.ok) throw new Error(name + ": " + response.status + " from " + SITE);
    const text = await response.text();
    if (!text.startsWith("---\nname: " + name)) throw new Error(name + ": the file is not a skill (no front matter)");
    const target = path.join(root, name, "SKILL.md");
    const sha = crypto.createHash("sha256").update(text).digest("hex").slice(0, 12);
    if (!dry) {
      fs.mkdirSync(path.dirname(target), { recursive: true });
      fs.writeFileSync(target, text);
    }
    console.log("  " + (dry ? "would write " : "wrote ") + target + " (" + text.length + " bytes, sha256 " + sha + ")");
  }
  console.log(dry ? "Nothing was written." : "Done. Restart your agent so it picks the skills up.");
})().catch((error) => {
  console.error(String(error.message || error));
  process.exit(1);
});