"""
Ticket Schemas - ServiceManagerWeb

Pydantic schemas para gestión de tickets y comentarios.
"""

from pydantic import BaseModel, ConfigDict, model_validator
from typing import Optional, Literal
from datetime import datetime


class TicketCreate(BaseModel):
    """Schema para crear un ticket."""
    subject: str
    description: str
    category_id: Optional[str] = None
    affected_system_id: Optional[str] = None
    priority: Literal["LOW", "MEDIUM", "HIGH", "URGENT"] = "MEDIUM"
    contact_email: Optional[str] = None
    contact_phone: Optional[str] = None

    @model_validator(mode="before")
    @classmethod
    def _accept_legacy_fields(cls, data):
        if not isinstance(data, dict):
            return data

        if "subject" not in data and "title" in data:
            data["subject"] = data["title"]

        if "affected_system_id" not in data and "system_id" in data:
            data["affected_system_id"] = data["system_id"]

        return data


class TicketUpdate(BaseModel):
    """Schema para actualizar un ticket."""
    subject: Optional[str] = None
    description: Optional[str] = None
    status: Optional[str] = None
    priority: Optional[str] = None
    assigned_to: Optional[str] = None


class TicketResponse(BaseModel):
    """Schema de respuesta con todos los campos públicos del ticket."""
    model_config = ConfigDict(from_attributes=True)

    id: str
    ticket_number: str
    subject: str
    title: str
    description: str
    status: str
    priority: str
    category_id: Optional[str] = None
    category_name: Optional[str] = None
    affected_system_id: Optional[str] = None
    system_id: Optional[str] = None
    affected_system_name: Optional[str] = None
    contact_email: Optional[str] = None
    contact_phone: Optional[str] = None
    created_by: str
    assigned_to: Optional[str] = None
    assigned_to_name: Optional[str] = None
    created_at: datetime
    updated_at: datetime
    sla_response_due: Optional[datetime] = None
    sla_resolution_due: Optional[datetime] = None
    first_response_at: Optional[datetime] = None
    resolved_at: Optional[datetime] = None


class TicketCloseRequest(BaseModel):
    """Schema para cerrar un ticket con resolución opcional."""
    resolution: Optional[str] = None


class CommentCreate(BaseModel):
    """Schema para crear un comentario en un ticket."""
    content: str
    is_internal: bool = False


class CommentResponse(BaseModel):
    """Schema de respuesta de comentario."""
    id: str
    ticket_id: str
    author_id: str
    author_name: str
    content: str
    is_internal: bool
    created_at: datetime
    updated_at: datetime

    model_config = ConfigDict(from_attributes=True)