from __future__ import annotations
import logging
from telegram.ext import Application, CommandHandler
from app.core.config import settings
from app.handlers.conversation import build_conversation
from app.handlers.profile import my_profile_handler, edit_hint_handler
from app.handlers.admin import (
    list_candidates_handler, candlist_pager, callback_router,
    view_candidate_handler, list_start, list_gender, list_city, list_verified, list_active, list_results_pager
)

logging.basicConfig(level=logging.INFO, format="%(levelname)s %(name)s: %(message)s")
log = logging.getLogger("bot")

async def start_cmd(update, context):
    await update.message.reply_text("Бот запущен. Набери /new, чтобы заполнить анкету.")

def build_app() -> Application:
    if not settings.BOT_TOKEN:
        raise RuntimeError("BOT_TOKEN is empty. Set it in .env")
    app = Application.builder().token(settings.BOT_TOKEN).build()

    # визард пользователя
    app.add_handler(build_conversation())

    # базовые
    app.add_handler(CommandHandler("start", start_cmd))
    app.add_handler(CommandHandler("my", my_profile_handler))
    app.add_handler(CommandHandler("edit", edit_hint_handler))

    # админские
    app.add_handler(CommandHandler("candidates", list_candidates_handler))
    app.add_handler(CommandHandler("view", view_candidate_handler))
    app.add_handler(CommandHandler("list", list_start))
    app.add_handler(CommandHandler("verify", lambda u, c: None))  # заглушка если где-то есть старая команда

    # callback-и
    from telegram.ext import CallbackQueryHandler, ConversationHandler, MessageHandler, filters
    app.add_handler(CallbackQueryHandler(candlist_pager, pattern=r"^candlist:page:"))
    app.add_handler(CallbackQueryHandler(callback_router, pattern=r"^cand:"))
    list_conv = ConversationHandler(
        entry_points=[CommandHandler("list", list_start)],
        states={
            0: [CallbackQueryHandler(list_gender, pattern=r"^list:gender:")],
            1: [CallbackQueryHandler(list_city, pattern=r"^list:city:"), MessageHandler(filters.TEXT & ~filters.COMMAND, list_city)],
            2: [CallbackQueryHandler(list_verified, pattern=r"^list:verified:")],
            3: [CallbackQueryHandler(list_active, pattern=r"^list:active:")],
        },
        fallbacks=[],
        allow_reentry=True,
    )
    app.add_handler(list_conv)
    app.add_handler(CallbackQueryHandler(list_results_pager, pattern=r"^listres:page:"))
    return app

if __name__ == "__main__":
    try:
        log.info("Starting bot…")
        log.info("DB URL masked is set: %s", "***" if settings.DATABASE_URL else "<empty>")
        application = build_app()
        application.run_polling(close_loop=False)
    except Exception as e:
        log.exception("Bot crashed on startup: %s", e)
        raise