from __future__ import annotations

from datetime import datetime
from typing import Any, Dict, List, Optional

from sqlalchemy.orm import Session

from app.core.utils import generate_uuid
from app.crud.crm.quote_approver_setting import join_approver_ids, parse_approver_ids
from app.models.crm_models import CrmContractApproverSetting
from app.models.models import SysUser


def _row_to_dict(row: CrmContractApproverSetting) -> Dict[str, Any]:
    return {
        "id": row.id,
        "approverIds": parse_approver_ids(row.approver_ids),
        "status": row.status or "0",
        "tenantNo": row.tenant_no,
        "updateTime": row.update_time.isoformat(sep=" ") if row.update_time else None,
    }


def get_setting(db: Session, *, tenant_no: str) -> Optional[Dict[str, Any]]:
    row = (
        db.query(CrmContractApproverSetting)
        .filter(
            CrmContractApproverSetting.tenant_no == tenant_no,
            CrmContractApproverSetting.del_flag == 0,
        )
        .order_by(CrmContractApproverSetting.update_time.desc())
        .first()
    )
    return _row_to_dict(row) if row else None


def _assert_users_exist(db: Session, *, tenant_no: str, approver_ids: List[str]) -> None:
    ids = [str(i).strip() for i in approver_ids if str(i).strip()]
    if not ids:
        return
    rows = (
        db.query(SysUser.id)
        .filter(SysUser.id.in_(ids), SysUser.del_flag == 0)
        .all()
    )
    found = {str(r[0]) for r in rows}
    missing = [i for i in ids if i not in found]
    if missing:
        raise ValueError(f"审批人无效或不存在：{','.join(missing)}")


def save_setting(
    db: Session,
    *,
    tenant_no: str,
    approver_ids: List[str],
    status: str,
    user_id: str = None,
    dept_id: str = "",
) -> Dict[str, Any]:
    status_norm = "1" if str(status) == "1" else "0"
    ids = [str(i).strip() for i in (approver_ids or []) if str(i).strip()]
    _assert_users_exist(db, tenant_no=tenant_no, approver_ids=ids)

    row = (
        db.query(CrmContractApproverSetting)
        .filter(
            CrmContractApproverSetting.tenant_no == tenant_no,
            CrmContractApproverSetting.del_flag == 0,
        )
        .first()
    )
    now = datetime.now()
    if row:
        row.approver_ids = join_approver_ids(ids)
        row.status = status_norm
        row.update_by = user_id
        row.update_time = now
    else:
        row = CrmContractApproverSetting(
            id=generate_uuid(),
            approver_ids=join_approver_ids(ids),
            status=status_norm,
            tenant_no=tenant_no,
            create_by=user_id,
            create_dept_id=dept_id or "",
            create_time=now,
            update_by=user_id,
            update_time=now,
            del_flag=0,
        )
        db.add(row)
    db.commit()
    db.refresh(row)
    return _row_to_dict(row)