from sqlalchemy.orm import Session, joinedload
from typing import Optional, List
from .models import Report


def get_by_id(db: Session, entity_id: str) -> Optional[Report]:
    return db.query(Report).filter(Report.id == entity_id).first()


def list_all(db: Session, limit: int = 20, offset: int = 0, **filters) -> List[Report]:
    q = db.query(Report)
    if filters.get("status") is not None:
        q = q.filter(Report.status == filters["status"])
    if filters.get("report_type") is not None:
        q = q.filter(Report.report_type == filters["report_type"])
    if filters.get("generated_by_user_id") is not None:
        q = q.filter(Report.generated_by_user_id == filters["generated_by_user_id"])
    if filters.get("start_date") is not None:
        q = q.filter(Report.start_date >= filters["start_date"])
    if filters.get("end_date") is not None:
        q = q.filter(Report.end_date <= filters["end_date"])
    return q.order_by(Report.created_at.desc()).limit(limit).offset(offset).all()


def count_all(db: Session, **filters) -> int:
    q = db.query(Report.id)
    if filters.get("status") is not None:
        q = q.filter(Report.status == filters["status"])
    if filters.get("report_type") is not None:
        q = q.filter(Report.report_type == filters["report_type"])
    if filters.get("generated_by_user_id") is not None:
        q = q.filter(Report.generated_by_user_id == filters["generated_by_user_id"])
    if filters.get("start_date") is not None:
        q = q.filter(Report.start_date >= filters["start_date"])
    if filters.get("end_date") is not None:
        q = q.filter(Report.end_date <= filters["end_date"])
    return q.count()


def create(db: Session, data: dict) -> Report:
    report = Report(**data)
    db.add(report)
    db.flush()
    return report


def update(db: Session, entity_id: str, data: dict) -> Optional[Report]:
    report = db.query(Report).filter(Report.id == entity_id).first()
    if report is None:
        return None
    for key, value in data.items():
        setattr(report, key, value)
    db.flush()
    return report


def delete(db: Session, entity_id: str) -> bool:
    report = db.query(Report).filter(Report.id == entity_id).first()
    if report is None:
        return False
    db.delete(report)
    db.flush()
    return True


def get_with_details(db: Session, entity_id: str) -> Optional[Report]:
    return (
        db.query(Report)
        .options(joinedload(Report.generated_by))
        .filter(Report.id == entity_id)
        .first()
    )