"""
Customer (Rolodex) API endpoints
"""
from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException, status, Query
from sqlalchemy.orm import Session, joinedload
from sqlalchemy import or_, func

from app.database.base import get_db
from app.models.rolodex import Rolodex, Phone
from app.models.user import User
from app.auth.security import get_current_user

router = APIRouter()


# Pydantic schemas for request/response
from pydantic import BaseModel, EmailStr
from datetime import date


class PhoneCreate(BaseModel):
    location: Optional[str] = None
    phone: str


class PhoneResponse(BaseModel):
    id: int
    location: Optional[str]
    phone: str
    
    class Config:
        from_attributes = True


class CustomerBase(BaseModel):
    id: str
    last: str
    first: Optional[str] = None
    middle: Optional[str] = None
    prefix: Optional[str] = None
    suffix: Optional[str] = None
    title: Optional[str] = None
    group: Optional[str] = None
    a1: Optional[str] = None
    a2: Optional[str] = None
    a3: Optional[str] = None
    city: Optional[str] = None
    abrev: Optional[str] = None
    zip: Optional[str] = None
    email: Optional[EmailStr] = None
    dob: Optional[date] = None
    ss_number: Optional[str] = None
    legal_status: Optional[str] = None
    memo: Optional[str] = None


class CustomerCreate(CustomerBase):
    pass


class CustomerUpdate(BaseModel):
    last: Optional[str] = None
    first: Optional[str] = None
    middle: Optional[str] = None
    prefix: Optional[str] = None
    suffix: Optional[str] = None
    title: Optional[str] = None
    group: Optional[str] = None
    a1: Optional[str] = None
    a2: Optional[str] = None
    a3: Optional[str] = None
    city: Optional[str] = None
    abrev: Optional[str] = None
    zip: Optional[str] = None
    email: Optional[EmailStr] = None
    dob: Optional[date] = None
    ss_number: Optional[str] = None
    legal_status: Optional[str] = None
    memo: Optional[str] = None


class CustomerResponse(CustomerBase):
    phone_numbers: List[PhoneResponse] = []
    
    class Config:
        from_attributes = True


@router.get("/search/phone")
async def search_by_phone(
    phone: str = Query(..., description="Phone number to search for"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Search customers by phone number (legacy phone search feature)"""
    phones = db.query(Phone).join(Rolodex).filter(
        Phone.phone.contains(phone)
    ).options(joinedload(Phone.rolodex_entry)).all()
    
    results = []
    for phone_record in phones:
        results.append({
            "phone": phone_record.phone,
            "location": phone_record.location,
            "customer": {
                "id": phone_record.rolodex_entry.id,
                "name": f"{phone_record.rolodex_entry.first or ''} {phone_record.rolodex_entry.last}".strip(),
                "city": phone_record.rolodex_entry.city,
                "state": phone_record.rolodex_entry.abrev
            }
        })
    
    return results


@router.get("/groups")
async def get_customer_groups(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Get list of customer groups for filtering"""
    groups = db.query(Rolodex.group).filter(
        Rolodex.group.isnot(None),
        Rolodex.group != ""
    ).distinct().all()
    
    return [{"group": group[0]} for group in groups if group[0]]


@router.get("/states")
async def get_states(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Get list of states used in the database"""
    states = db.query(Rolodex.abrev).filter(
        Rolodex.abrev.isnot(None),
        Rolodex.abrev != ""
    ).distinct().all()
    
    return [{"state": state[0]} for state in states if state[0]]


@router.get("/stats")
async def get_customer_stats(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Get customer database statistics"""
    total_customers = db.query(Rolodex).count()
    total_phones = db.query(Phone).count()
    customers_with_email = db.query(Rolodex).filter(
        Rolodex.email.isnot(None),
        Rolodex.email != ""
    ).count()
    
    # Group breakdown
    group_stats = db.query(Rolodex.group, func.count(Rolodex.id)).filter(
        Rolodex.group.isnot(None),
        Rolodex.group != ""
    ).group_by(Rolodex.group).all()
    
    return {
        "total_customers": total_customers,
        "total_phone_numbers": total_phones,
        "customers_with_email": customers_with_email,
        "group_breakdown": [{"group": group, "count": count} for group, count in group_stats]
    }


@router.get("/", response_model=List[CustomerResponse])
async def list_customers(
    skip: int = Query(0, ge=0),
    limit: int = Query(50, ge=1, le=200),
    search: Optional[str] = Query(None),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """List customers with pagination and search"""
    try:
        query = db.query(Rolodex).options(joinedload(Rolodex.phone_numbers))
        
        if search:
            query = query.filter(
                or_(
                    Rolodex.id.contains(search),
                    Rolodex.last.contains(search),
                    Rolodex.first.contains(search),
                    Rolodex.city.contains(search),
                    Rolodex.email.contains(search)
                )
            )
        
        customers = query.offset(skip).limit(limit).all()
        return customers
        
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Error loading customers: {str(e)}")


@router.get("/{customer_id}", response_model=CustomerResponse)
async def get_customer(
    customer_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Get specific customer by ID"""
    customer = db.query(Rolodex).options(joinedload(Rolodex.phone_numbers)).filter(
        Rolodex.id == customer_id
    ).first()
    
    if not customer:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Customer not found"
        )
    
    return customer


@router.post("/", response_model=CustomerResponse)
async def create_customer(
    customer_data: CustomerCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Create new customer"""
    # Check if ID already exists
    existing = db.query(Rolodex).filter(Rolodex.id == customer_data.id).first()
    if existing:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Customer ID already exists"
        )
    
    customer = Rolodex(**customer_data.model_dump())
    db.add(customer)
    db.commit()
    db.refresh(customer)
    
    return customer


@router.put("/{customer_id}", response_model=CustomerResponse)
async def update_customer(
    customer_id: str,
    customer_data: CustomerUpdate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Update customer"""
    customer = db.query(Rolodex).filter(Rolodex.id == customer_id).first()
    
    if not customer:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Customer not found"
        )
    
    # Update fields
    for field, value in customer_data.model_dump(exclude_unset=True).items():
        setattr(customer, field, value)
    
    db.commit()
    db.refresh(customer)
    
    return customer


@router.delete("/{customer_id}")
async def delete_customer(
    customer_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Delete customer"""
    customer = db.query(Rolodex).filter(Rolodex.id == customer_id).first()
    
    if not customer:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Customer not found"
        )
    
    db.delete(customer)
    db.commit()
    
    return {"message": "Customer deleted successfully"}


@router.get("/{customer_id}/phones", response_model=List[PhoneResponse])
async def get_customer_phones(
    customer_id: str,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Get customer phone numbers"""
    customer = db.query(Rolodex).filter(Rolodex.id == customer_id).first()
    
    if not customer:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Customer not found"
        )
    
    phones = db.query(Phone).filter(Phone.rolodex_id == customer_id).all()
    return phones


@router.post("/{customer_id}/phones", response_model=PhoneResponse)
async def add_customer_phone(
    customer_id: str,
    phone_data: PhoneCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Add phone number to customer"""
    customer = db.query(Rolodex).filter(Rolodex.id == customer_id).first()
    
    if not customer:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Customer not found"
        )
    
    phone = Phone(
        rolodex_id=customer_id,
        location=phone_data.location,
        phone=phone_data.phone
    )
    
    db.add(phone)
    db.commit()
    db.refresh(phone)
    
    return phone


@router.put("/{customer_id}/phones/{phone_id}", response_model=PhoneResponse)
async def update_customer_phone(
    customer_id: str,
    phone_id: int,
    phone_data: PhoneCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Update customer phone number"""
    phone = db.query(Phone).filter(
        Phone.id == phone_id, 
        Phone.rolodex_id == customer_id
    ).first()
    
    if not phone:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Phone number not found"
        )
    
    phone.location = phone_data.location
    phone.phone = phone_data.phone
    
    db.commit()
    db.refresh(phone)
    
    return phone


@router.delete("/{customer_id}/phones/{phone_id}")
async def delete_customer_phone(
    customer_id: str,
    phone_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """Delete customer phone number"""
    phone = db.query(Phone).filter(
        Phone.id == phone_id, 
        Phone.rolodex_id == customer_id
    ).first()
    
    if not phone:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Phone number not found"
        )
    
    db.delete(phone)
    db.commit()
    
    return {"message": "Phone number deleted successfully"}