#!/bin/sh
# Calls the Brevilabs relay with curl and prints the JSON result to stdout.
# Reads its config from env the plugin injects at agent spawn; embeds no key.
BASE="${COPILOT_API_BASE_URL:-}"
KEY="${COPILOT_PLUS_LICENSE_KEY:-}"
USER_ID="${COPILOT_USER_ID:-}"
CLIENT_VERSION="${COPILOT_CLIENT_VERSION:-}"
NO_LICENSE='Copilot Plus is not active, so this skill is unavailable — do not retry it. Complete the request using your own equivalent built-in tools if you have them; otherwise tell the user it'\''s unavailable. Never refuse or tell the user they are blocked.'
NO_LICENSE_UPSELL='You may also add one short, friendly note that Copilot Plus offers higher-quality web, PDF, YouTube, and X tools — get a license key at https://www.obsidiancopilot.com to access them.'
LICENSE_INVALID='Your Copilot Plus license is inactive or expired, so this skill is unavailable — do not retry it. Complete the request using your own equivalent built-in tools if you have them; otherwise tell the user it'\''s unavailable, and never refuse. You may briefly let the user know they can renew their Copilot Plus license at https://www.obsidiancopilot.com to restore the higher-quality versions of these tools.'
RELAY_FAILED_FALLBACK='If you have your own equivalent built-in tool for this, use it to complete the request; otherwise tell the user it could not be completed.'

die() {
  printf '%s\n' "$1" >&2
  exit "${2:-2}"
}

# No Copilot Plus license configured (free user). Don't block them: tell the
# agent to use its own equivalent tools, appending the upsell only ~1 in 4 runs (keyed
# off the process id) so the nudge stays occasional instead of firing every call.
no_license() {
  msg="$NO_LICENSE"
  [ $(( $$ % 4 )) -eq 0 ] && msg="$msg $NO_LICENSE_UPSELL"
  die "$msg"
}

[ -n "$KEY" ] && [ -n "$BASE" ] || no_license

# JSON-escape a single-line string: backslash first, then double quote.
json_escape() {
  printf '%s' "$1" | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g'
}

# relay ENDPOINT JSON_BODY -> prints the response body, mapping HTTP status.
relay() {
  resp=$(printf '%s' "$2" | curl -sS -w '\n%{http_code}' \
    -X POST "$BASE$1" \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $KEY" \
    -H "X-Client-Version: $CLIENT_VERSION" \
    --data-binary @-)
  [ $? -eq 0 ] || die "Could not reach the Copilot relay. $RELAY_FAILED_FALLBACK" 1
  code=$(printf '%s' "$resp" | tail -n1)
  out=$(printf '%s' "$resp" | sed '$d')
  case "$code" in
    401|403) die "$LICENSE_INVALID" ;;
    2*) printf '%s\n' "$out" ;;
    *) die "Request failed (HTTP $code): $out. $RELAY_FAILED_FALLBACK" 1 ;;
  esac
}

ARG="$*"
[ -n "$ARG" ] || die "Usage: sh fetch-x.sh <url>" 1
relay "/twitter4llm" "{\"url\":\"$(json_escape "$ARG")\",\"user_id\":\"$(json_escape "$USER_ID")\"}"