#!/bin/sh
# fuast agent setup:
#
#     curl -fsSL fuast.com/install | sh
#
# Connects fuast's MCP server (https://fuast.com/mcp) to Claude Code, Codex and Gemini CLI
# when they are installed, and saves the fuast skill so your coding agent knows
# how to build and deploy an app with it. No account is created and nothing is
# deployed. Run it again to update the skill.
set -u

# One function, called on the last line: sh reads all of it before running any of
# it, and every command gets /dev/null as stdin, so none can swallow the rest of
# a piped script.
main() {
  URL="https://fuast.com/mcp"
  NAME="fuast"
  SKILL_URL="https://fuast.com/skill.md"
  found=0

  say() { printf '%s\n' "$*"; }
  have() { command -v "$1" >/dev/null 2>&1; }

  # Agent CLIs often live in a folder that a non-interactive shell (ssh, an agent's own shell) does not search.
  for d in "$HOME/.local/bin" "$HOME/.bun/bin" "$HOME/.npm-global/bin" "$HOME/.local/node/bin" /opt/homebrew/bin /usr/local/bin; do
    case ":$PATH:" in *":$d:"*) ;; *) if [ -d "$d" ]; then PATH="$PATH:$d"; fi ;; esac
  done
  export PATH

  fetch() {
    if have curl; then curl -fsSL "$1" -o "$2"
    elif have wget; then wget -q "$1" -O "$2"
    else return 1; fi
  }

  # skill <label> <skills directory>: save the skill there, replacing an older copy.
  skill() {
    dir="$2/fuast-build-and-host-small-apps"
    tmp="$dir/SKILL.md.tmp"
    if mkdir -p "$dir" 2>/dev/null && fetch "$SKILL_URL" "$tmp" 2>/dev/null && grep -q '^name: fuast-build-and-host-small-apps$' "$tmp" 2>/dev/null && mv "$tmp" "$dir/SKILL.md"; then
      say "$1: fuast skill saved to $dir"
    else
      rm -f "$tmp" 2>/dev/null
      say "$1: couldn't save the skill. Get it from $SKILL_URL"
    fi
  }

  if have claude; then
    found=1
    if claude mcp get "$NAME" >/dev/null 2>&1; then say "Claude Code: fuast already connected"
    elif claude mcp add --transport http --scope user "$NAME" "$URL" >/dev/null 2>&1; then say "Claude Code: fuast connected"
    else say "Claude Code: couldn't connect. Run: claude mcp add --transport http --scope user fuast https://fuast.com/mcp"; fi
    skill "Claude Code" "${CLAUDE_CONFIG_DIR:-$HOME/.claude}/skills"
  fi

  if have codex; then
    found=1
    if codex mcp get "$NAME" >/dev/null 2>&1; then say "Codex: fuast already connected"
    else
      # codex mcp add saves the server, then may wait on a browser sign-in; stop it once saved.
      codex mcp add "$NAME" --url "$URL" >/dev/null 2>&1 &
      pid=$!
      i=0
      while [ "$i" -lt 15 ] && ! codex mcp get "$NAME" >/dev/null 2>&1; do sleep 1; i=$((i + 1)); done
      kill "$pid" 2>/dev/null
      wait "$pid" 2>/dev/null
      if codex mcp get "$NAME" >/dev/null 2>&1; then say "Codex: fuast connected"
      else say "Codex: couldn't connect. Run: codex mcp add fuast --url https://fuast.com/mcp"; fi
    fi
    skill "Codex" "$HOME/.agents/skills"
  fi

  if have gemini; then
    found=1
    if gemini mcp list 2>&1 | grep -qw "$NAME"; then say "Gemini CLI: fuast already connected"
    elif gemini mcp add --transport http --scope user "$NAME" "$URL" >/dev/null 2>&1; then say "Gemini CLI: fuast connected"
    else say "Gemini CLI: couldn't connect. Run: gemini mcp add --transport http --scope user fuast https://fuast.com/mcp"; fi
    skill "Gemini CLI" "$HOME/.gemini/skills"
  fi

  if [ "$found" -eq 0 ]; then
    say "No Claude Code, Codex or Gemini CLI found, so nothing was changed."
    say "For Claude, ChatGPT, Cursor and VS Code: https://fuast.com/agents"
    say "For any other agent that reads skills: npx skills add https://fuast.com"
    exit 0
  fi

  say ""
  say "Done. Nothing needs an account: your agent deploys a preview and hands you a claim link."
  say "Open your coding agent and say: \"Build a lunch order app for my team with fuast\""
}

main </dev/null