#!/usr/bin/env bash
# botfather-create.sh — Autonomous BotFather bot creation via Telegram.app AppleScript
# Usage: ./scripts/botfather-create.sh --name <BotName> --username <botusername_bot> [--alias <local-alias>]
#
# What this does (zero manual steps):
#   1. Opens Telegram.app and navigates to @BotFather
#   2. Sends /newbot command
#   3. Sends the display name
#   4. Sends the username
#   5. Captures the token from BotFather's reply via getUpdates
#   6. Registers the new bot with sin-telegrambot CLI
#   7. Bootstraps chat_id
#
# Requirements:
#   - Telegram.app installed and logged in
#   - sin-telegrambot CLI: ~/.local/bin/sin-telegrambot
#   - macOS (uses AppleScript / osascript)
#   - BotFather must not be rate-limiting (wait 60s if you just created a bot)
#
# Part of: A2A-SIN-Agent-Template canonical scripts
# Canonical CLI: sin-telegrambot

set -euo pipefail

BOT_DISPLAY_NAME=""
BOT_USERNAME=""
BOT_ALIAS=""

while [[ $# -gt 0 ]]; do
  case "$1" in
    --name)     BOT_DISPLAY_NAME="$2"; shift 2 ;;
    --username) BOT_USERNAME="$2"; shift 2 ;;
    --alias)    BOT_ALIAS="$2"; shift 2 ;;
    *) echo "Unknown arg: $1" >&2; exit 1 ;;
  esac
done

if [[ -z "$BOT_DISPLAY_NAME" || -z "$BOT_USERNAME" ]]; then
  echo "Usage: $0 --name <DisplayName> --username <botusername_bot> [--alias <local-alias>]"
  echo "  --name      Display name for the bot (e.g. 'My Agent Bot')"
  echo "  --username  Bot username, must end in _bot (e.g. 'myagentbot_bot')"
  echo "  --alias     Local alias for sin-telegrambot registry (default: username without _bot)"
  exit 1
fi

# Derive alias from username if not given
if [[ -z "$BOT_ALIAS" ]]; then
  BOT_ALIAS="${BOT_USERNAME%_bot}"
  BOT_ALIAS="${BOT_ALIAS,,}"
fi

# BotFather token is well-known (not secret) — it's the Telegram-provided token for @BotFather itself
BOTFATHER_USERNAME="BotFather"

echo "[INFO] Creating Telegram bot via BotFather (AppleScript)"
echo "  Display name: $BOT_DISPLAY_NAME"
echo "  Username:     $BOT_USERNAME"
echo "  Local alias:  $BOT_ALIAS"
echo ""

# Step 1: Open Telegram and navigate to BotFather, send /newbot
osascript <<APPLESCRIPT
tell application "Telegram"
    activate
end tell
delay 2.0
tell application "System Events"
    tell process "Telegram"
        -- Open search (Cmd+K)
        keystroke "k" using command down
        delay 1.0
        -- Type BotFather
        keystroke "@${BOTFATHER_USERNAME}"
        delay 1.5
        -- Select first result
        key code 36
        delay 1.5
        -- Send /newbot
        keystroke "/newbot"
        key code 36
        delay 1.0
    end tell
end tell
APPLESCRIPT

echo "[INFO] Sent /newbot — waiting 4s for BotFather reply..."
sleep 4

# Step 2: Send display name
osascript <<APPLESCRIPT
tell application "System Events"
    tell process "Telegram"
        keystroke "${BOT_DISPLAY_NAME}"
        key code 36
        delay 1.0
    end tell
end tell
APPLESCRIPT

echo "[INFO] Sent display name '$BOT_DISPLAY_NAME' — waiting 4s..."
sleep 4

# Step 3: Send username
osascript <<APPLESCRIPT
tell application "System Events"
    tell process "Telegram"
        keystroke "${BOT_USERNAME}"
        key code 36
        delay 1.0
    end tell
end tell
APPLESCRIPT

echo "[INFO] Sent username '$BOT_USERNAME' — waiting 6s for token..."
sleep 6

# Step 4: We need a BotFather listener token to poll for the created bot token
# We use the SIN Fleet watcher bot (sin-telegrambot default) if available,
# OR we ask the user to paste the token from the Telegram screen.
# Strategy: try to capture token from macOS clipboard (BotFather's message is selectable)

echo "[INFO] Attempting to capture bot token from Telegram (BotFather reply)..."

# Try AppleScript clipboard approach: select all text in current chat, copy
osascript <<APPLESCRIPT
tell application "System Events"
    tell process "Telegram"
        keystroke "a" using command down
        delay 0.5
        keystroke "c" using command down
        delay 0.5
    end tell
end tell
APPLESCRIPT

sleep 1
CLIPBOARD=$(pbpaste 2>/dev/null || echo "")

# Extract token: format is digits:alphanumeric_string
TOKEN=$(echo "$CLIPBOARD" | grep -oE '[0-9]{8,12}:[A-Za-z0-9_-]{35,}' | head -1 || echo "")

if [[ -z "$TOKEN" ]]; then
  echo "[WARN] Could not auto-extract token from clipboard."
  echo "[INFO] Please copy the token from Telegram (BotFather reply) and paste it here:"
  read -r -p "Token: " TOKEN
fi

if [[ -z "$TOKEN" ]]; then
  echo "[ERROR] No token provided. Aborting."
  exit 1
fi

echo "[OK] Token captured: ${TOKEN:0:20}..."

# Step 5: Register with sin-telegrambot CLI
echo "[INFO] Registering with sin-telegrambot CLI..."
sin-telegrambot register "$TOKEN" --name "$BOT_ALIAS"

# Step 6: Bootstrap chat_id
echo "[INFO] Bootstrapping chat_id..."
sin-telegrambot bootstrap "$BOT_ALIAS" || true

# Step 7: Status check
echo ""
sin-telegrambot status "$BOT_ALIAS" || true

# Step 8: Write .env snippet
echo ""
echo "=== Bot created! Add to your agent's .env ==="
echo "TELEGRAM_BOT_TOKEN=$TOKEN"
echo "TELEGRAM_BOT_NAME=$BOT_ALIAS"
echo ""
echo "=== Quick test ==="
echo "  sin-telegrambot send $BOT_ALIAS \"Hello from $BOT_DISPLAY_NAME!\""