from datetime import datetime
from telegram import Update
from telegram.constants import ChatType, ParseMode
from telegram.ext import ContextTypes

from app.db.session import get_session
from app.db.models import User, Draft
from app.bot.messages import (
    ASK_MEDIA, ASK_TEXT, TEXT_ADDED, CONFIRM, ALREADY_AT_TEXT, ALREADY_READY, NEED_START_NEW
)
from app.bot.keyboards.common import kb_next_text, kb_confirm
from .add_group import add_group_capture, STATE_KEY  # /add_group ожидание

# Состояния пошагового редактора
STATE_DRAFT = "draft_state"
KEY_DRAFT_ID = "draft_id"
STATE_AWAIT_MEDIA = "await_media"
STATE_AWAIT_TEXT = "await_text"
STATE_CONFIRM = "confirm"


def _start_new_draft(tg_id: int) -> Draft:
    with get_session() as s:
        u = s.query(User).filter_by(tg_id=tg_id).first()
        if not u:
            u = User(tg_id=tg_id, name="")
            s.add(u); s.commit(); s.refresh(u)
        # Закрываем предыдущие "editing" как cancelled (по желанию)
        s.query(Draft).filter(Draft.user_id == u.id, Draft.status == "editing").update({"status": "cancelled"})
        d = Draft(user_id=u.id, status="editing")
        s.add(d); s.commit(); s.refresh(d)
        return d


def _get_draft(draft_id: int) -> Draft | None:
    with get_session() as s:
        return s.get(Draft, draft_id)


async def new_cmd(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
    d = _start_new_draft(update.effective_user.id)
    ctx.user_data[KEY_DRAFT_ID] = d.id
    ctx.user_data[STATE_DRAFT] = STATE_AWAIT_MEDIA
    await update.effective_message.reply_text(ASK_MEDIA, reply_markup=kb_next_text(d.id))


async def on_text(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
    # Если ждём chat_id для /add_group, отдаём управление туда
    if ctx.user_data.get(STATE_KEY):
        return await add_group_capture(update, ctx)

    if update.effective_chat.type != ChatType.PRIVATE:
        return

    draft_id = ctx.user_data.get(KEY_DRAFT_ID)
    state = ctx.user_data.get(STATE_DRAFT)

    if not draft_id or not state:
        await update.effective_message.reply_text(NEED_START_NEW)
        return

    if state == STATE_AWAIT_MEDIA:
        # Сначала медиа
        await update.effective_message.reply_text("Сначала пришлите медиа и нажмите «Дальше — текст».")
        return

    if state == STATE_CONFIRM:
        await update.effective_message.reply_text(ALREADY_READY)
        return

    if state == STATE_AWAIT_TEXT:
        with get_session() as s:
            d = s.get(Draft, draft_id)
            d.text = update.effective_message.text_html_urled
            d.updated_at = datetime.utcnow()
            s.commit()
        ctx.user_data[STATE_DRAFT] = STATE_CONFIRM
        await update.effective_message.reply_text(TEXT_ADDED, parse_mode=ParseMode.HTML)
        await update.effective_message.reply_text(CONFIRM, reply_markup=kb_confirm(draft_id))