#!/usr/bin/env bash
# Post an announcement to a Discord channel using the bot's token.
# Usage: ./scripts/announce.sh "Your message here" [channel_name]
# Default channel: general

set -euo pipefail

MESSAGE="${1:?Usage: announce.sh \"message\" [channel_name]}"
CHANNEL_NAME="${2:-general}"

# Fetch bot token from barge
TOKEN=$(ssh aj@barge.lan "grep DISCORD_BOT_TOKEN /mnt/docker/breehavior-monitor/.env" | cut -d= -f2-)

if [[ -z "$TOKEN" ]]; then
    echo "ERROR: Could not read bot token from barge." >&2
    exit 1
fi

# Get guilds the bot is in
GUILDS=$(curl -s -H "Authorization: Bot $TOKEN" "https://discord.com/api/v10/users/@me/guilds")
GUILD_ID=$(echo "$GUILDS" | python -c "import sys,json; print(json.load(sys.stdin)[0]['id'])")

if [[ -z "$GUILD_ID" ]]; then
    echo "ERROR: Could not find guild." >&2
    exit 1
fi

# Get channels and find the target by name
CHANNEL_ID=$(curl -s -H "Authorization: Bot $TOKEN" "https://discord.com/api/v10/guilds/$GUILD_ID/channels" \
    | python -c "
import sys, json
channels = json.load(sys.stdin)
for ch in channels:
    if ch['name'] == sys.argv[1] and ch['type'] == 0:
        print(ch['id'])
        break
" "$CHANNEL_NAME")

if [[ -z "$CHANNEL_ID" ]]; then
    echo "ERROR: Channel #$CHANNEL_NAME not found." >&2
    exit 1
fi

# Build JSON payload safely
PAYLOAD=$(python -c "import json,sys; print(json.dumps({'content': sys.argv[1]}))" "$MESSAGE")

# Post the message
RESPONSE=$(curl -s -w "\n%{http_code}" -X POST \
    -H "Authorization: Bot $TOKEN" \
    -H "Content-Type: application/json" \
    -d "$PAYLOAD" \
    "https://discord.com/api/v10/channels/$CHANNEL_ID/messages")

HTTP_CODE=$(echo "$RESPONSE" | tail -1)

if [[ "$HTTP_CODE" == "200" ]]; then
    echo "Posted to #$CHANNEL_NAME"
else
    BODY=$(echo "$RESPONSE" | sed '$d')
    echo "ERROR: HTTP $HTTP_CODE" >&2
    echo "$BODY" >&2
    exit 1
fi