# app/modules/customers/routes/api/admin.py
"""
Customer management endpoints for admin.

Provides admin-level access to customer data across all stores.
"""

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

from app.api.deps import get_current_admin_api, require_module_access
from app.core.database import get_db
from app.modules.customers.schemas import (
    CustomerDetailResponse,
    CustomerListResponse,
    CustomerMessageResponse,
    CustomerStatisticsResponse,
)
from app.modules.customers.services import admin_customer_service
from app.modules.enums import FrontendType
from app.modules.tenancy.schemas.auth import UserContext

# Create module-aware router
admin_router = APIRouter(
    prefix="/customers",
    dependencies=[Depends(require_module_access("customers", FrontendType.ADMIN))],
)


# ============================================================================
# List Customers
# ============================================================================


@admin_router.get("", response_model=CustomerListResponse)
def list_customers(
    store_id: int | None = Query(None, description="Filter by store ID"),
    search: str = Query("", description="Search by email, name, or customer number"),
    is_active: bool | None = Query(None, description="Filter by active status"),
    skip: int = Query(0, ge=0),
    limit: int = Query(20, ge=1, le=100),
    db: Session = Depends(get_db),
    current_admin: UserContext = Depends(get_current_admin_api),
) -> CustomerListResponse:
    """
    Get paginated list of customers across all stores.

    Admin can filter by store, search, and active status.
    """
    customers, total = admin_customer_service.list_customers(
        db=db,
        store_id=store_id,
        search=search if search else None,
        is_active=is_active,
        skip=skip,
        limit=limit,
    )

    # Calculate pagination values
    page = (skip // limit) + 1 if limit > 0 else 1
    per_page = limit
    total_pages = (total + limit - 1) // limit if limit > 0 else 1

    return CustomerListResponse(
        customers=customers,
        total=total,
        page=page,
        per_page=per_page,
        total_pages=total_pages,
    )


# ============================================================================
# Customer Statistics
# ============================================================================


@admin_router.get("/stats", response_model=CustomerStatisticsResponse)
def get_customer_stats(
    store_id: int | None = Query(None, description="Filter by store ID"),
    db: Session = Depends(get_db),
    current_admin: UserContext = Depends(get_current_admin_api),
) -> CustomerStatisticsResponse:
    """Get customer statistics."""
    stats = admin_customer_service.get_customer_stats(db=db, store_id=store_id)
    return CustomerStatisticsResponse(**stats)


# ============================================================================
# Get Single Customer
# ============================================================================


@admin_router.get("/{customer_id}", response_model=CustomerDetailResponse)
def get_customer(
    customer_id: int,
    db: Session = Depends(get_db),
    current_admin: UserContext = Depends(get_current_admin_api),
) -> CustomerDetailResponse:
    """Get customer details by ID."""
    customer = admin_customer_service.get_customer(db=db, customer_id=customer_id)
    return CustomerDetailResponse(**customer)


# ============================================================================
# Toggle Customer Status
# ============================================================================


@admin_router.patch("/{customer_id}/toggle-status", response_model=CustomerMessageResponse)
def toggle_customer_status(
    customer_id: int,
    db: Session = Depends(get_db),
    current_admin: UserContext = Depends(get_current_admin_api),
) -> CustomerMessageResponse:
    """Toggle customer active status."""
    result = admin_customer_service.toggle_customer_status(
        db=db,
        customer_id=customer_id,
        admin_email=current_admin.email,
    )
    db.commit()
    return CustomerMessageResponse(message=result["message"])