# app/modules/customers/services/customer_features.py
"""
Customer feature provider for the billing feature system.

Declares customer-related billable features (view, export, messaging)
for feature gating.
"""

from __future__ import annotations

import logging
from typing import TYPE_CHECKING

from app.modules.contracts.features import (
    FeatureDeclaration,
    FeatureScope,
    FeatureType,
    FeatureUsage,
)

if TYPE_CHECKING:
    from sqlalchemy.orm import Session

logger = logging.getLogger(__name__)


class CustomerFeatureProvider:
    """Feature provider for the customers module.

    Declares:
    - customer_view: binary merchant-level feature for viewing customer data
    - customer_export: binary merchant-level feature for exporting customer data
    - customer_messaging: binary merchant-level feature for customer messaging
    """

    @property
    def feature_category(self) -> str:
        return "customers"

    def get_feature_declarations(self) -> list[FeatureDeclaration]:
        return [
            FeatureDeclaration(
                code="customer_view",
                name_key="customers.features.customer_view.name",
                description_key="customers.features.customer_view.description",
                category="customers",
                feature_type=FeatureType.BINARY,
                scope=FeatureScope.MERCHANT,
                ui_icon="eye",
                display_order=10,
            ),
            FeatureDeclaration(
                code="customer_export",
                name_key="customers.features.customer_export.name",
                description_key="customers.features.customer_export.description",
                category="customers",
                feature_type=FeatureType.BINARY,
                scope=FeatureScope.MERCHANT,
                ui_icon="download",
                display_order=20,
            ),
            FeatureDeclaration(
                code="customer_messaging",
                name_key="customers.features.customer_messaging.name",
                description_key="customers.features.customer_messaging.description",
                category="customers",
                feature_type=FeatureType.BINARY,
                scope=FeatureScope.MERCHANT,
                ui_icon="message-circle",
                display_order=30,
            ),
        ]

    def get_store_usage(
        self,
        db: Session,
        store_id: int,
    ) -> list[FeatureUsage]:
        return []

    def get_merchant_usage(
        self,
        db: Session,
        merchant_id: int,
        platform_id: int,
    ) -> list[FeatureUsage]:
        return []


# Singleton instance for module registration
customer_feature_provider = CustomerFeatureProvider()

__all__ = [
    "CustomerFeatureProvider",
    "customer_feature_provider",
]
