"""Business logic services for JIGAIDO bounty tracker.

These services orchestrate operations through storage ports.
No implementation details - pure orchestration layer.
"""

import time
from typing import Optional

from core.models import Bounty, RoomData, TrackingData, TrackedBounty
from core.ports import RoomStorage, TrackingStorage


class RoomBountyService:
    """Service for managing bounties within a room.

    Orchestrates bounty operations through a RoomStorage port.

    A room is identified by room_id:
    - Negative room_id: Telegram group
    - Positive room_id: DM/personal context

    This single service handles both group and personal bounties.
    """

    def __init__(self, storage: RoomStorage):
        self._storage = storage

    def add_bounty(
        self,
        room_id: int,
        user_id: int,
        text: Optional[str] = None,
        link: Optional[str] = None,
        due_date_ts: Optional[int] = None,
    ) -> Bounty:
        """Add a new bounty to a room. Returns the created bounty."""
        room_data = self._storage.load(room_id)
        if room_data is None:
            room_data = RoomData(room_id=room_id, bounties=[], next_id=1)

        bounty = Bounty(
            id=room_data.next_id,
            text=text,
            link=link,
            due_date_ts=due_date_ts,
            created_at=int(time.time()),
            created_by_user_id=user_id,
        )

        room_data.bounties.append(bounty)
        room_data.next_id += 1
        self._storage.save(room_data)

        return bounty

    def get_bounty(self, room_id: int, bounty_id: int) -> Bounty | None:
        """Get a bounty by ID. Returns None if not found."""
        return self._storage.get_bounty(room_id, bounty_id)

    def list_bounties(self, room_id: int) -> list[Bounty]:
        """List all bounties in a room. Returns empty list if room not found."""
        room_data = self._storage.load(room_id)
        if room_data is None:
            return []
        return room_data.bounties.copy()

    def update_bounty(
        self,
        room_id: int,
        bounty_id: int,
        user_id: int,
        text: Optional[str] = None,
        link: Optional[str] = None,
        due_date_ts: Optional[int] = None,
        clear_link: bool = False,
        clear_due: bool = False,
    ) -> bool:
        """Update a bounty. Only creator can update. Raises PermissionError if not creator."""
        bounty = self._storage.get_bounty(room_id, bounty_id)
        if bounty is None:
            return False

        if bounty.created_by_user_id != user_id:
            raise PermissionError("Only the creator can edit this bounty.")

        updated = Bounty(
            id=bounty.id,
            text=text if text is not None else bounty.text,
            link=None if clear_link else (link if link is not None else bounty.link),
            due_date_ts=None
            if clear_due
            else (due_date_ts if due_date_ts is not None else bounty.due_date_ts),
            created_at=bounty.created_at,
            created_by_user_id=bounty.created_by_user_id,
        )

        self._storage.update_bounty(room_id, updated)
        return True

    def delete_bounty(self, room_id: int, bounty_id: int, user_id: int) -> bool:
        """Delete a bounty. Only creator can delete. Raises PermissionError if not creator."""
        bounty = self._storage.get_bounty(room_id, bounty_id)
        if bounty is None:
            return False

        if bounty.created_by_user_id != user_id:
            raise PermissionError("Only the creator can delete this bounty.")

        self._storage.delete_bounty(room_id, bounty_id)
        return True


class TrackingService:
    """Service for managing bounty tracking.

    Orchestrates tracking operations through a TrackingStorage port.
    """

    def __init__(self, storage: TrackingStorage, room_storage: RoomStorage):
        self._storage = storage
        self._room_storage = room_storage

    def track_bounty(self, room_id: int, user_id: int, bounty_id: int) -> bool:
        """Start tracking a bounty. Verifies bounty exists first. Raises ValueError if not found."""
        bounty = self._room_storage.get_bounty(room_id, bounty_id)
        if bounty is None:
            raise ValueError("Bounty not found.")

        tracking_data = self._storage.load(room_id, user_id)
        if tracking_data is None:
            tracking_data = TrackingData(room_id=room_id, user_id=user_id, tracked=[])

        for tracked in tracking_data.tracked:
            if tracked.bounty_id == bounty_id:
                return False

        tracked = TrackedBounty(bounty_id=bounty_id, created_at=int(time.time()))
        self._storage.track_bounty(room_id, user_id, tracked)
        return True

    def untrack_bounty(self, room_id: int, user_id: int, bounty_id: int) -> bool:
        """Stop tracking a bounty. Returns True if was tracking, False if not found."""
        tracking_data = self._storage.load(room_id, user_id)
        if tracking_data is None:
            return False

        for tracked in tracking_data.tracked:
            if tracked.bounty_id == bounty_id:
                self._storage.untrack_bounty(room_id, user_id, bounty_id)
                return True

        return False

    def list_tracked(self, room_id: int, user_id: int) -> list[TrackedBounty]:
        """List all tracked bounties for a user in a room. Returns empty list if not tracking."""
        tracking_data = self._storage.load(room_id, user_id)
        if tracking_data is None:
            return []
        return tracking_data.tracked.copy()