from pydantic import BaseModel, Field, field_validator
from typing import List, Optional, Dict, Any
from datetime import datetime

class OptimizerJobRequestDTO(BaseModel):
    """Contrato de solicitud para iniciar una optimización heurística."""
    commission_ids: List[int] = Field(..., min_length=1, description="Lista de IDs de comisiones a programar")
    start_date: Optional[datetime] = Field(None, description="Fecha de inicio (ISO format)")
    end_date: Optional[datetime] = Field(None, description="Fecha de fin (ISO format)")
    generations: int = Field(default=80, ge=10, le=500, description="Cantidad de generaciones genéticas")
    population_size: int = Field(default=40, ge=10, le=200, description="Tamaño de la población de cromosomas")
    workers: int = Field(default=4, ge=1, le=16, description="Cantidad de hilos o workers concurrentes")

    @field_validator('commission_ids')
    @classmethod
    def validate_ids(cls, v):
        if not v or len(v) == 0:
            raise ValueError("Debe suministrar al menos una comisión para optimizar.")
        return list(set(v))


class SpringBootCommissionDTO(BaseModel):
    """Contrato de comisión en formato Spring Boot."""
    commissionId: int
    subjectCode: str
    subjectName: str
    expectedAttendees: int = Field(default=30, ge=1)
    preferredShift: Optional[str] = "NOCHE"
    preferredStart: datetime
    preferredEnd: datetime


class SpringBootClassroomDTO(BaseModel):
    """Contrato de aula en formato Spring Boot."""
    classroomId: int
    roomNumber: str
    capacity: int = Field(default=30, ge=1)
    building: Optional[str] = "Edificio Central"
    isVirtual: bool = False


class SpringBootSyncPayloadDTO(BaseModel):
    """Carga útil de sincronización interoperable con microservicios Spring Boot."""
    requestId: str = Field(..., description="Identificador único de la petición externa")
    campusCode: Optional[str] = "CENTRAL"
    academicTerm: Optional[str] = "2026-1C"
    commissions: List[SpringBootCommissionDTO] = Field(..., min_length=1)
    classrooms: Optional[List[SpringBootClassroomDTO]] = None
    options: Optional[Dict[str, Any]] = None