from __future__ import annotations

import ssl
import xmlrpc.client
from dataclasses import dataclass
from typing import Any, Dict, List, Optional

from app.config import settings


class OdooIntegrationError(RuntimeError):
    pass


@dataclass
class OdooConfig:
    base_url: str
    db: str
    username: str
    api_key: str


def get_odoo_config() -> OdooConfig:
    base_url = (settings.odoo_base_url or "").rstrip("/")
    db = settings.odoo_db or ""
    username = settings.odoo_username or ""
    api_key = settings.odoo_api_key or ""

    if not base_url:
        raise OdooIntegrationError("ODOO_BASE_URL não está configurado.")
    if not db:
        raise OdooIntegrationError("ODOO_DB não está configurado.")
    if not username:
        raise OdooIntegrationError("ODOO_USERNAME não está configurado.")
    if not api_key:
        raise OdooIntegrationError("ODOO_API_KEY não está configurado.")

    return OdooConfig(base_url=base_url, db=db, username=username, api_key=api_key)


class OdooClient:
    def __init__(self, config: Optional[OdooConfig] = None):
        self.config = config or get_odoo_config()
        self._uid: Optional[int] = None
        context = ssl._create_unverified_context()

        self.common = xmlrpc.client.ServerProxy(
            f"{self.config.base_url}/xmlrpc/2/common",
            allow_none=True,
            context=context,
        )
        self.models = xmlrpc.client.ServerProxy(
            f"{self.config.base_url}/xmlrpc/2/object",
            allow_none=True,
            context=context,
        )

    def version(self) -> Dict[str, Any]:
        try:
            return dict(self.common.version())
        except Exception as exc:
            raise OdooIntegrationError(f"Falha ao consultar versão Odoo: {exc}") from exc

    def authenticate(self) -> int:
        if self._uid:
            return self._uid
        try:
            uid = self.common.authenticate(
                self.config.db,
                self.config.username,
                self.config.api_key,
                {},
            )
        except Exception as exc:
            raise OdooIntegrationError(f"Falha de autenticação Odoo: {exc}") from exc

        if not uid:
            raise OdooIntegrationError("Autenticação Odoo falhou. Verifica ODOO_USERNAME e ODOO_API_KEY/password.")

        self._uid = int(uid)
        return self._uid

    def execute_kw(
        self,
        model: str,
        method: str,
        args: Optional[List[Any]] = None,
        kwargs: Optional[Dict[str, Any]] = None,
    ) -> Any:
        uid = self.authenticate()
        try:
            return self.models.execute_kw(
                self.config.db,
                uid,
                self.config.api_key,
                model,
                method,
                args or [],
                kwargs or {},
            )
        except Exception as exc:
            raise OdooIntegrationError(f"Odoo {model}.{method} falhou: {exc}") from exc

    def search_read(
        self,
        model: str,
        domain: Optional[List[Any]] = None,
        fields: Optional[List[str]] = None,
        *,
        limit: int = 500,
        offset: int = 0,
        order: str = "id asc",
        context: Optional[Dict[str, Any]] = None,
    ) -> List[Dict[str, Any]]:
        kwargs: Dict[str, Any] = {
            "fields": fields or [],
            "limit": int(limit),
            "offset": int(offset),
            "order": order,
        }
        if context is not None:
            kwargs["context"] = context
        return list(self.execute_kw(model, "search_read", [domain or []], kwargs) or [])

    def count(self, model: str, domain: Optional[List[Any]] = None) -> int:
        return int(self.execute_kw(model, "search_count", [domain or []]) or 0)