"""Cards management router."""
import json
from typing import Optional

from fastapi import APIRouter, Depends, HTTPException, Query, Request
from sqlalchemy.orm import Session
from sqlalchemy import func
from datetime import datetime, timezone

from app.auth import get_current_user, AdminUser
from app.database import get_db
from app.models.db_models import CardLog, SystemSetting
from app.services import airwallex_service
from app.services.audit_log import create_card_log, create_audit_log

router = APIRouter(prefix="/api/cards", tags=["cards"])


@router.get("")
def list_cards(
    page_num: int = Query(0, ge=0),
    page_size: int = Query(20, ge=1, le=100),
    cardholder_id: Optional[str] = None,
    status: Optional[str] = None,
    db: Session = Depends(get_db),
    user: AdminUser = Depends(get_current_user),
):
    """List cards with optional filters."""
    return airwallex_service.list_cards(db, page_num, page_size, cardholder_id, status)


@router.post("")
def create_card(
    request: Request,
    card_data: dict,
    db: Session = Depends(get_db),
    user: AdminUser = Depends(get_current_user),
):
    """Create a new card."""
    # Check daily limit
    today_start = datetime.now(timezone.utc).replace(hour=0, minute=0, second=0, microsecond=0)
    today_count = (
        db.query(func.count(CardLog.id))
        .filter(CardLog.action == "create_card", CardLog.status == "success", CardLog.created_at >= today_start)
        .scalar()
    ) or 0

    limit_setting = db.query(SystemSetting).filter(SystemSetting.key == "daily_card_limit").first()
    daily_limit = int(limit_setting.value) if limit_setting else 100

    if today_count >= daily_limit:
        raise HTTPException(status_code=429, detail=f"Daily card creation limit ({daily_limit}) reached")

    try:
        result = airwallex_service.create_card(db, card_data)
        create_card_log(
            db,
            action="create_card",
            status="success",
            operator=user.username,
            card_id=result.get("card_id", result.get("id", "")),
            cardholder_id=card_data.get("cardholder_id", ""),
            request_data=json.dumps(card_data),
            response_data=json.dumps(result, default=str),
        )
        create_audit_log(
            db,
            action="create_card",
            resource_type="card",
            resource_id=result.get("card_id", result.get("id", "")),
            operator=user.username,
            ip_address=request.client.host if request.client else "",
            details=f"Created card for cardholder {card_data.get('cardholder_id', '')}",
        )
        return result
    except Exception as e:
        create_card_log(
            db,
            action="create_card",
            status="failed",
            operator=user.username,
            cardholder_id=card_data.get("cardholder_id", ""),
            request_data=json.dumps(card_data),
            response_data=str(e),
        )
        raise HTTPException(status_code=400, detail=str(e))


@router.get("/{card_id}")
def get_card(
    card_id: str,
    db: Session = Depends(get_db),
    user: AdminUser = Depends(get_current_user),
):
    """Get card by ID."""
    try:
        return airwallex_service.get_card(db, card_id)
    except Exception as e:
        raise HTTPException(status_code=404, detail=str(e))


@router.get("/{card_id}/details")
def get_card_details(
    card_id: str,
    request: Request,
    db: Session = Depends(get_db),
    user: AdminUser = Depends(get_current_user),
):
    """Get sensitive card details (card number, CVV, expiry)."""
    create_audit_log(
        db,
        action="view_card_details",
        resource_type="card",
        resource_id=card_id,
        operator=user.username,
        ip_address=request.client.host if request.client else "",
    )
    try:
        return airwallex_service.get_card_details(db, card_id)
    except Exception as e:
        raise HTTPException(status_code=404, detail=str(e))


@router.put("/{card_id}")
def update_card(
    card_id: str,
    update_data: dict,
    request: Request,
    db: Session = Depends(get_db),
    user: AdminUser = Depends(get_current_user),
):
    """Update card attributes."""
    try:
        result = airwallex_service.update_card(db, card_id, update_data)
        create_audit_log(
            db,
            action="update_card",
            resource_type="card",
            resource_id=card_id,
            operator=user.username,
            ip_address=request.client.host if request.client else "",
            details=json.dumps(update_data),
        )
        return result
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))