# app/modules/loyalty/routes/api/storefront.py
"""
Loyalty Module - Storefront API Routes

Customer-facing endpoints for:
- View loyalty card and balance
- View transaction history
- Self-service enrollment
- Get program information

Uses store from middleware context (StoreContextMiddleware).
"""

import logging

from fastapi import APIRouter, Depends, Query, Request
from sqlalchemy.orm import Session

from app.api.deps import get_current_customer_api
from app.core.database import get_db
from app.modules.customers.schemas import CustomerContext
from app.modules.loyalty.schemas import (
    CardEnrollRequest,
    CardResponse,
    ProgramResponse,
)
from app.modules.loyalty.services import card_service, program_service
from app.modules.tenancy.exceptions import StoreNotFoundException

storefront_router = APIRouter()
logger = logging.getLogger(__name__)


# =============================================================================
# Public Endpoints (No Authentication Required)
# =============================================================================


@storefront_router.get("/loyalty/program")
def get_program_info(
    request: Request,
    db: Session = Depends(get_db),
):
    """
    Get loyalty program information for current store.
    Public endpoint - no authentication required.
    """
    store = getattr(request.state, "store", None)
    if not store:
        raise StoreNotFoundException("context", identifier_type="subdomain")

    program = program_service.get_program_by_store(db, store.id)
    if not program:
        return None

    response = ProgramResponse.model_validate(program)
    response.is_stamps_enabled = program.is_stamps_enabled
    response.is_points_enabled = program.is_points_enabled
    response.display_name = program.display_name

    return response


@storefront_router.post("/loyalty/enroll")
def self_enroll(
    request: Request,
    data: CardEnrollRequest,
    db: Session = Depends(get_db),
):
    """
    Self-service enrollment.
    Public endpoint - customers can enroll via QR code without authentication.
    """
    store = getattr(request.state, "store", None)
    if not store:
        raise StoreNotFoundException("context", identifier_type="subdomain")

    # Check if self-enrollment is allowed
    program_service.check_self_enrollment_allowed(db, store.merchant_id)

    # Resolve customer_id
    customer_id = card_service.resolve_customer_id(
        db,
        customer_id=data.customer_id,
        email=data.email,
        store_id=store.id,
    )

    logger.info(f"Self-enrollment for customer {customer_id} at store {store.subdomain}")

    card = card_service.enroll_customer_for_store(db, customer_id, store.id)

    return CardResponse.model_validate(card)


# =============================================================================
# Authenticated Endpoints
# =============================================================================


@storefront_router.get("/loyalty/card")
def get_my_card(
    request: Request,
    customer: CustomerContext = Depends(get_current_customer_api),
    db: Session = Depends(get_db),
):
    """
    Get customer's loyalty card and program info.
    Returns card details, program info, and available rewards.
    """
    store = getattr(request.state, "store", None)
    if not store:
        raise StoreNotFoundException("context", identifier_type="subdomain")

    logger.debug(f"Getting loyalty card for customer {customer.id}")

    # Get program
    program = program_service.get_program_by_store(db, store.id)
    if not program:
        return {"card": None, "program": None, "locations": []}

    # Look up card by customer ID and merchant
    card = card_service.get_card_by_customer_and_merchant(
        db,
        customer_id=customer.id,
        merchant_id=program.merchant_id,
    )

    if not card:
        return {"card": None, "program": None, "locations": []}

    # Get merchant locations
    locations = program_service.get_merchant_locations(db, program.merchant_id)

    program_response = ProgramResponse.model_validate(program)
    program_response.is_stamps_enabled = program.is_stamps_enabled
    program_response.is_points_enabled = program.is_points_enabled
    program_response.display_name = program.display_name

    return {
        "card": CardResponse.model_validate(card),
        "program": program_response,
        "locations": [{"id": v.id, "name": v.name} for v in locations],
    }


@storefront_router.get("/loyalty/transactions")
def get_my_transactions(
    request: Request,
    skip: int = Query(0, ge=0),
    limit: int = Query(20, ge=1, le=100),
    customer: CustomerContext = Depends(get_current_customer_api),
    db: Session = Depends(get_db),
):
    """
    Get customer's loyalty transaction history.
    """
    store = getattr(request.state, "store", None)
    if not store:
        raise StoreNotFoundException("context", identifier_type="subdomain")

    logger.debug(f"Getting transactions for customer {customer.id}")

    # Get program
    program = program_service.get_program_by_store(db, store.id)
    if not program:
        return {"transactions": [], "total": 0}

    # Get card
    card = card_service.get_card_by_customer_and_merchant(
        db,
        customer_id=customer.id,
        merchant_id=program.merchant_id,
    )

    if not card:
        return {"transactions": [], "total": 0}

    # Get transactions with store names
    tx_responses, total = card_service.get_customer_transactions_with_store_names(
        db, card.id, skip=skip, limit=limit
    )

    return {"transactions": tx_responses, "total": total}