#!/usr/bin/env bash
# post-bot-alert.sh — post a one-line message to the Discord #bot-alerts channel.
#
# Usage:
#   bash post-bot-alert.sh "message text"
#   echo "message text" | bash post-bot-alert.sh
#
# Token resolution (first hit wins):
#   1. SOPS vault: projects/discord-bot/bot-token.sops.yaml  field credentials.bot_token
#   2. projects/discord-bot/.env                              key  DISCORD_TOKEN
# Reading from the vault means this works from any machine, not just BEAST.
#
# Soft-fail by design: if the message is empty, the token is missing, or Discord is
# unreachable, it prints a [WARNING] and exits 0 so it NEVER breaks the caller
# (e.g. the /syncro billing workflow). The alert is best-effort, not load-bearing.

set -u

CHANNEL_ID="624710699771232265"   # #bot-alerts (Arizona Computer Guru guild)
ROOT="${CLAUDETOOLS_ROOT:-$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)}"

# --- message (arg or stdin) ---
MSG="${1:-}"
if [ -z "$MSG" ] && [ ! -t 0 ]; then MSG="$(cat)"; fi
if [ -z "$MSG" ]; then
  echo "[WARNING] post-bot-alert: empty message — nothing sent" >&2
  exit 0
fi

# --- token: vault first, then .env ---
TOKEN="$(bash "$ROOT/.claude/scripts/vault.sh" get-field \
  projects/discord-bot/bot-token.sops.yaml credentials.bot_token 2>/dev/null)"
if [ -z "$TOKEN" ] || [ "$TOKEN" = "null" ]; then
  ENV_FILE="$ROOT/projects/discord-bot/.env"
  if [ -f "$ENV_FILE" ]; then
    TOKEN="$(grep -iE '^[[:space:]]*DISCORD_TOKEN[[:space:]]*=' "$ENV_FILE" | head -1 \
      | sed -E 's/^[^=]*=[[:space:]]*//; s/^["'"'"']//; s/["'"'"'][[:space:]]*$//')"
  fi
fi
if [ -z "$TOKEN" ] || [ "$TOKEN" = "null" ]; then
  echo "[WARNING] post-bot-alert: no bot token (vault + .env both empty) — alert skipped" >&2
  exit 0
fi

# --- post (jq builds JSON so the message is safely escaped) ---
PAYLOAD="$(jq -nc --arg c "$MSG" '{content: $c}')"
RESP="$(curl -s -m 15 -w $'\n%{http_code}' \
  -X POST "https://discord.com/api/v10/channels/${CHANNEL_ID}/messages" \
  -H "Authorization: Bot ${TOKEN}" \
  -H "Content-Type: application/json" \
  -H "User-Agent: ClaudeToolsBot (claudetools, 1.0)" \
  --data-binary "$PAYLOAD" 2>/dev/null)"

HTTP="$(printf '%s' "$RESP" | tail -n1)"
BODY="$(printf '%s' "$RESP" | sed '$d')"

if [ "$HTTP" = "200" ]; then
  MID="$(printf '%s' "$BODY" | jq -r '.id // empty' 2>/dev/null)"
  echo "[OK] post-bot-alert: posted to #bot-alerts (message_id=${MID})"
  exit 0
fi

echo "[WARNING] post-bot-alert: Discord returned ${HTTP:-no-response} — ${BODY}" >&2
exit 0