#!/usr/bin/env python3
"""
SuperSam — Manual Campaign (State Machine)
Заменяет n8n workflow "Ручное управление"

Логика:
  Если после второй SMS (notification_status = 'second_sms_sent')
  прошло auto_manual_after_hours и клиент не согласовал
  (delivery_status = 'pending_confirmation'):
    → notification_status = 'manual_required'
    → delivery_status = 'manual_confirmation_required'
    → next_notification_check_at = +3 мин
    → Telegram-уведомление

Расписание: 9-21, Пн-Сб (настраивается из админки)
Скрипт НЕ отправляет SMS — только перевод в ручное управление.
"""

import os
import sys
import fcntl
import logging
from datetime import datetime, timezone, timedelta

import requests
import psycopg2
from psycopg2.extras import RealDictCursor

# ─── Конфигурация ────────────────────────────────────────────────────────────

DB_HOST = os.environ.get("DB_HOST", "10.0.4.12")
DB_PORT = os.environ.get("DB_PORT", "5432")
DB_NAME = os.environ.get("DB_NAME", "postgres")
DB_USER = os.environ.get("DB_USER", "supabase_admin")
DB_PASS = os.environ.get("DB_PASS", "4fe80bb21c7c3d17a8d8b226adf7a479")

TELEGRAM_BOT_TOKEN = os.environ.get("TELEGRAM_BOT_TOKEN", "")
TELEGRAM_CHAT_ID = os.environ.get("TELEGRAM_CHAT_ID", "25164483")

LOG_FILE = "/var/log/supersam-sms-manual.log"

CAMPAIGN_TYPE = "manual"

# ─── Логирование ─────────────────────────────────────────────────────────────

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(message)s",
    handlers=[
        logging.FileHandler(LOG_FILE),
        logging.StreamHandler(sys.stdout),
    ],
)
log = logging.getLogger("sms_manual")

# ─── БД ──────────────────────────────────────────────────────────────────────

def get_db_conn():
    return psycopg2.connect(
        host=DB_HOST, port=DB_PORT, dbname=DB_NAME,
        user=DB_USER, password=DB_PASS,
    )

def load_settings(conn):
    with conn.cursor(cursor_factory=RealDictCursor) as cur:
        cur.execute("SELECT * FROM sms_campaign_settings WHERE campaign_type = %s", (CAMPAIGN_TYPE,))
        row = cur.fetchone()
        if not row:
            return {"enabled": True, "auto_manual_after_hours": 3, "telegram_chat_id": TELEGRAM_CHAT_ID}
        return dict(row)

# ─── Telegram ────────────────────────────────────────────────────────────────

def send_telegram(message, chat_id):
    pass  # Telegram notifications moved to n8n+Supabase integration

# ─── Проверка рабочего времени ────────────────────────────────────────────────


def get_sms_days(conn):
    """Read sms_days from business_schedule_settings. Returns comma-separated string."""
    try:
        with conn.cursor(cursor_factory=RealDictCursor) as cur:
            cur.execute("SELECT sms_days FROM business_schedule_settings WHERE id = 1")
            row = cur.fetchone()
            if row and row.get("sms_days"):
                days = row["sms_days"]
                if isinstance(days, list):
                    return ",".join(str(d) for d in days)
                return str(days)
    except Exception:
        pass
    return "1,2,3,4,5"  # Default: Mon-Fri

def is_within_work_hours(settings):
    now_msk = datetime.now(timezone(timedelta(hours=3)))
    today_num = now_msk.weekday() + 1
    allowed_days = set()
    work_days_str = settings.get("work_days", "1,2,3,4,5,6")
    for part in str(work_days_str).split(","):
        part = part.strip()
        if part.isdigit():
            allowed_days.add(int(part))
    if today_num not in allowed_days:
        return False
    hour = now_msk.hour
    start_h = settings.get("work_hours_start", 9)
    end_h = settings.get("work_hours_end", 21)
    return start_h <= hour < end_h

# ─── State Machine ───────────────────────────────────────────────────────────

def get_groups_to_manual(conn):
    """Группы, где срок ожидания истёк и нужно перевести в ручное управление.

    Сценарии:
    1. second_sms_sent + next_check в прошлом → клиент не согласовал после 2х SMS
    2. first_sms_sent + next_check в прошлом + >3h + second_sms_sent_at IS NOT NULL → клиент не согласовал после 2й SMS
    3. link_ready + next_check в прошлом + нет активных SMS → зависшая группа
    4. sms_sending/second_sms_sending/checking + >3h без доставки → зависшая группа
    """
    with conn.cursor(cursor_factory=RealDictCursor) as cur:
        cur.execute("""
            SELECT og.id, og.group_key, og.customer_name, og.customer_phone,
                   og.notification_status, og.delivery_link,
                   og.first_sms_sent_at, og.second_sms_sent_at,
                   og.sms_sent_at, og.next_notification_check_at,
                   og.sms_attempts
            FROM order_groups og
            WHERE og.delivery_status = 'pending_confirmation'
              AND (
                -- 1. second_sms_sent + срок истёк
                (COALESCE(og.notification_status, '') = 'second_sms_sent'
                 AND (og.next_notification_check_at IS NULL OR og.next_notification_check_at <= NOW()))
                -- 2. first_sms_sent + срок истёк (>3h после отправки)
                -- ВАЖНО: вторая SMS должна быть уже отправлена (second_sms_sent_at IS NOT NULL)
                -- Иначе second_campaign не успеет отправить вторую SMS
                OR (COALESCE(og.notification_status, '') = 'first_sms_sent'
                 AND (og.next_notification_check_at IS NULL OR og.next_notification_check_at <= NOW())
                 AND og.first_sms_sent_at < NOW() - INTERVAL '3 hours'
                 AND og.second_sms_sent_at IS NOT NULL)
                -- 3. link_ready + next_check в прошлом + SMS уже отправлялась хотя бы раз
                -- ВАЖНО: если SMS никогда не отправлялась (нет записи в логе), не переводить в manual --
                -- возможно first campaign ещё не успел отправить (БД была недоступна и т.п.)
                OR (COALESCE(og.notification_status, '') = 'link_ready'
                 AND (og.next_notification_check_at IS NULL OR og.next_notification_check_at <= NOW())
                 AND EXISTS (
                   SELECT 1 FROM sms_campaign_log scl
                   WHERE scl.order_group_id = og.id
                     AND scl.status IN ('sent', 'checking', 'delivered')
                 )
                 AND NOT EXISTS (
                   SELECT 1 FROM sms_campaign_log scl
                   WHERE scl.order_group_id = og.id
                     AND scl.status IN ('sent', 'checking')
                     AND scl.created_at > NOW() - INTERVAL '2 hours'
                 ))
                -- 4. sms_sending/checking + >3h без доставки (зависло)
                OR (COALESCE(og.notification_status, '') IN ('sms_sending', 'second_sms_sending', 'checking')
                 AND COALESCE(og.sms_sent_at, og.created_at) < NOW() - INTERVAL '3 hours')
              )
            ORDER BY og.created_at ASC
        """)
        return [dict(r) for r in cur.fetchall()]

def update_order_group(conn, group_id, fields):
    with conn.cursor() as cur:
        set_parts = []
        values = []
        for k, v in fields.items():
            if isinstance(v, str) and v.startswith("NOW()"):
                set_parts.append(f"{k} = {v}")
            else:
                set_parts.append(f"{k} = %s")
                values.append(v)
        values.append(group_id)
        cur.execute(f"UPDATE order_groups SET {', '.join(set_parts)} WHERE id = %s", values)
    conn.commit()

# ─── Основная логика ─────────────────────────────────────────────────────────

def step_move_to_manual(conn, settings):
    """Перевод групп в ручное управление"""
    tg_chat = settings.get("telegram_chat_id", TELEGRAM_CHAT_ID)
    delay_minutes = settings.get("auto_manual_after_hours", 3)

    groups = get_groups_to_manual(conn)
    log.info(f"Step 1: {len(groups)} groups to move to manual")

    moved = 0
    for group in groups:
        group_id = str(group["id"])
        name = group.get("customer_name") or group.get("group_key", "—")
        phone = group.get("customer_phone", "")
        delivery_link = group.get("delivery_link", "")

        log.info(f"Group {group_id}: moving to manual_required ({name})")

        update_order_group(conn, group_id, {
            "notification_status": "manual_required",
            "delivery_status": "manual_confirmation_required",
            "sms_attempts": 2,
            "last_sms_error": None,
            "next_notification_check_at": f"NOW() + INTERVAL '{int(delay_minutes)} minutes'",
            "status": "manual_required",
        })

        send_telegram(
            f"🔧 <b>Ручное управление</b>\n{name} ({phone})\n"
            f"Клиент не согласовал доставку после двух SMS\n"
            f"Ссылка: {delivery_link}",
            tg_chat,
        )
        moved += 1

    return moved

# ─── Main ────────────────────────────────────────────────────────────────────

def main():
    # File lock — prevent parallel execution
    lock_file = open("/tmp/" + __file__.split("/")[-1].replace(".py", ".lock"), "w")
    try:
        fcntl.flock(lock_file, fcntl.LOCK_EX | fcntl.LOCK_NB)
    except (IOError, OSError):
        log.info("Another instance is running, exiting")
        lock_file.close()
        return
    
    log.info("=" * 60)
    log.info("Manual Campaign — START")
    conn = get_db_conn()

    try:
        settings = load_settings(conn)
        # Override work_days with business_schedule sms_days
        settings["work_days"] = get_sms_days(conn)
        
        # Update last_run_at timestamp
        with conn.cursor() as cur:
            cur.execute("UPDATE sms_campaign_settings SET last_run_at = NOW() WHERE campaign_type = %s", (CAMPAIGN_TYPE,))
            conn.commit()
        
        # Check test_send_requested — one-time test send
        test_send_requested = bool(settings.get("test_send_requested", False))
        if test_send_requested:
            # Reset flag immediately
            with conn.cursor() as cur:
                cur.execute("UPDATE sms_campaign_settings SET test_send_requested = false WHERE campaign_type = %s", (CAMPAIGN_TYPE,))
                conn.commit()
            log.info("Test send requested — will send ONE SMS to test phone only")
        log.info(f"Settings: work_hours={settings.get('work_hours_start')}-{settings.get('work_hours_end')}, "
                 f"work_days={settings.get('work_days')}")

        if not settings.get("enabled", True):
            log.info("Campaign disabled, exiting")
            return

        # Только в рабочие часы
        if not is_within_work_hours(settings):
            log.info("Outside work hours, skipping")
            return

        if test_send_requested:
            log.info("Test send requested for manual campaign — no SMS to send, marking as done")
        
        # run_requested for manual = just run the step
        run_requested = bool(settings.get("run_requested", False))
        if run_requested:
            with conn.cursor() as cur:
                cur.execute("UPDATE sms_campaign_settings SET run_requested = false WHERE campaign_type = 'manual'")
                conn.commit()
            log.info("RESTART: manual campaign — will process all eligible groups now")
        else:
            moved = step_move_to_manual(conn, settings)

        log.info(f"Run summary: moved_to_manual={moved}")

        if moved > 0:
            send_telegram(
                f"📊 <b>Ручное управление</b>\nПереведено в ручное: {moved}",
                settings.get("telegram_chat_id", TELEGRAM_CHAT_ID),
            )

    except Exception as e:
        log.error(f"Fatal error: {e}", exc_info=True)
    finally:
        conn.close()
        fcntl.flock(lock_file, fcntl.LOCK_UN)
        lock_file.close()

    log.info("Manual Campaign — END")
    log.info("=" * 60)


if __name__ == "__main__":
    main()