"""Favorites / wishlist service."""

from __future__ import annotations

from datetime import datetime, timezone

from app.core.exceptions import ConflictException, NotFoundException
from app.core.supabase import get_supabase_admin


class FavoriteService:
    def __init__(self):
        self.db = get_supabase_admin()

    def add_favorite(self, user_id: str, listing_id: str) -> dict:
        # Check listing exists
        listing = self.db.table("listings").select("id").eq("id", listing_id).execute()
        if not listing.data:
            raise NotFoundException("Listing not found")

        # Check if already favorited
        existing = (
            self.db.table("favorites")
            .select("id")
            .eq("user_id", user_id)
            .eq("listing_id", listing_id)
            .execute()
        )
        if existing.data:
            raise ConflictException("Listing already in favorites")

        now = datetime.now(timezone.utc).isoformat()
        result = (
            self.db.table("favorites")
            .insert({"user_id": user_id, "listing_id": listing_id, "created_at": now})
            .execute()
        )
        if not result.data:
            raise Exception("Failed to add favorite")
        return result.data[0]

    def remove_favorite(self, user_id: str, listing_id: str) -> dict:
        result = (
            self.db.table("favorites")
            .delete()
            .eq("user_id", user_id)
            .eq("listing_id", listing_id)
            .execute()
        )
        if not result.data:
            raise NotFoundException("Favorite not found")
        return {"message": "Removed from favorites"}

    def list_favorites(self, user_id: str) -> dict:
        result = (
            self.db.table("favorites")
            .select(
                "*, listings("
                "id, title, description, price, images, location, status, "
                "agency_id, category_id, listing_type, condition, negotiable, "
                "views_count, created_at, updated_at"
                ")",
                count="exact",
            )
            .eq("user_id", user_id)
            .order("created_at", desc=True)
            .execute()
        )
        return {"favorites": result.data, "total": result.count or 0}

    def is_favorited(self, user_id: str, listing_id: str) -> bool:
        result = (
            self.db.table("favorites")
            .select("id")
            .eq("user_id", user_id)
            .eq("listing_id", listing_id)
            .execute()
        )
        return len(result.data) > 0