import logging

from sqlalchemy.orm import Session

from app.chat.notice_inbox import post_notice_to_latest_chat
from app.chat.notices import format_phase_completed_notice
from app.db.models import PomodoroSession
from app.pomodoro.cycle import PHASE_LONG_BREAK, PHASE_SHORT_BREAK, PHASE_WORK, CycleManager
from app.pomodoro.service import PomodoroService

logger = logging.getLogger(__name__)

PHASE_LABELS = {
    PHASE_WORK: "работа",
    PHASE_SHORT_BREAK: "короткий перерыв",
    PHASE_LONG_BREAK: "длинный перерыв",
}


class PomodoroCompletionHandler:
    def __init__(self, db: Session):
        self.db = db
        self.pomodoro = PomodoroService(db)
        self.cycle = CycleManager(db)

    def _resolve_next_phase(self, session: PomodoroSession) -> str | None:
        phase = session.phase
        cycle = self.cycle.get()
        if phase == PHASE_WORK:
            if cycle.completed_work_sessions + 1 >= cycle.sessions_until_long_break:
                return PHASE_LONG_BREAK
            return PHASE_SHORT_BREAK
        if phase == PHASE_SHORT_BREAK:
            return PHASE_WORK
        if phase == PHASE_LONG_BREAK:
            return None
        return None

    async def process(self, session: PomodoroSession) -> None:
        if session.completion_notified:
            return

        next_phase = self._resolve_next_phase(session)
        notice = format_phase_completed_notice(session, next_phase)

        # Только notice — role=assistant ломает tool/reasoning цепочки OpenRouter.
        post_notice_to_latest_chat(notice)

        self.cycle.bump_notify_seq()
        self.pomodoro.mark_notified(session)
        self.pomodoro.advance_after_completion(session)
        logger.info("Pomodoro phase completed notice posted (phase=%s)", session.phase)