# app/api/v1/vendor/dashboard.py
"""
Vendor dashboard and statistics endpoints.

Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern).
The get_current_vendor_api dependency guarantees token_vendor_id is present.
"""

import logging

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

from app.api.deps import get_current_vendor_api
from app.core.database import get_db
from app.exceptions import VendorNotActiveException
from app.services.stats_service import stats_service
from app.services.vendor_service import vendor_service
from models.database.user import User
from app.modules.analytics.schemas import (
    VendorCustomerStats,
    VendorDashboardStatsResponse,
    VendorInfo,
    VendorOrderStats,
    VendorProductStats,
    VendorRevenueStats,
)

router = APIRouter(prefix="/dashboard")
logger = logging.getLogger(__name__)


@router.get("/stats", response_model=VendorDashboardStatsResponse)
def get_vendor_dashboard_stats(
    request: Request,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get vendor-specific dashboard statistics.

    Returns statistics for the current vendor only:
    - Total products in catalog
    - Total orders
    - Total customers
    - Revenue metrics

    Vendor is determined from the JWT token (vendor_id claim).
    Requires Authorization header (API endpoint).
    """
    vendor_id = current_user.token_vendor_id

    # Get vendor object (raises VendorNotFoundException if not found)
    vendor = vendor_service.get_vendor_by_id(db, vendor_id)

    if not vendor.is_active:
        raise VendorNotActiveException(vendor.vendor_code)

    # Get vendor-scoped statistics
    stats_data = stats_service.get_vendor_stats(db=db, vendor_id=vendor_id)

    return VendorDashboardStatsResponse(
        vendor=VendorInfo(
            id=vendor.id,
            name=vendor.name,
            vendor_code=vendor.vendor_code,
        ),
        products=VendorProductStats(
            total=stats_data.get("total_products", 0),
            active=stats_data.get("active_products", 0),
        ),
        orders=VendorOrderStats(
            total=stats_data.get("total_orders", 0),
            pending=stats_data.get("pending_orders", 0),
            completed=stats_data.get("completed_orders", 0),
        ),
        customers=VendorCustomerStats(
            total=stats_data.get("total_customers", 0),
            active=stats_data.get("active_customers", 0),
        ),
        revenue=VendorRevenueStats(
            total=stats_data.get("total_revenue", 0),
            this_month=stats_data.get("revenue_this_month", 0),
        ),
    )