/**
 * DrugMapper - Infrastructure Layer
 * Convierte entre Domain (Drug) y Persistence (DB rows).
 */

import type { Drug, AdministrationRoute, DrugCategory } from '../../domain/entities/Drug.js';
import { ContentStatus } from '../../domain/value-objects/ContentStatus.js';

export interface DrugRow {
  id: string;
  slug: string;
  generic_name: string;
  trade_name?: string | null;
  category: string;
  line: string;
  frequency: string;
  presentation: string;
  adult_dose: string;
  pediatric_dose?: string | null;
  routes?: string[] | null;
  dilution?: string | null;
  indications?: string[] | null;
  contraindications?: string[] | null;
  side_effects?: string | null;
  antidote?: string | null;
  notes?: string[] | null;
  critical_points?: string[] | null;
  source?: string | null;
  status: string;
  version: string;
  latest_version: string;
  created_at: Date | string;
  updated_at: Date | string;
  created_by: string;
  updated_by?: string | null;
}

/**
 * Convierte una fila de BD a entidad de dominio.
 */
export function toDomain(row: DrugRow): Drug {
  const status = typeof row.status === 'string' ? ContentStatus.fromString(row.status) : ContentStatus.DRAFT;
  const createdAt = row.created_at instanceof Date ? row.created_at : new Date(String(row.created_at));
  const updatedAt = row.updated_at instanceof Date ? row.updated_at : new Date(String(row.updated_at));

  return {
    id: row.id,
    slug: row.slug,
    genericName: row.generic_name,
    tradeName: row.trade_name ?? undefined,
    category: row.category as DrugCategory,
    line: row.line === 'first' || row.line === 'second' ? row.line : 'first',
    frequency: row.frequency === 'high' || row.frequency === 'medium' || row.frequency === 'low' ? row.frequency : 'medium',
    presentation: row.presentation,
    adultDose: row.adult_dose,
    pediatricDose: row.pediatric_dose ?? undefined,
    routes: (row.routes ?? []) as AdministrationRoute[],
    dilution: row.dilution ?? undefined,
    indications: row.indications ?? [],
    contraindications: row.contraindications ?? [],
    sideEffects: row.side_effects ?? undefined,
    antidote: row.antidote ?? undefined,
    notes: row.notes ?? [],
    criticalPoints: row.critical_points ?? [],
    source: row.source ?? undefined,
    status,
    version: row.version ?? '1.0.0',
    latestVersion: row.latest_version ?? row.version ?? '1.0.0',
    createdAt,
    updatedAt,
    createdBy: row.created_by,
    updatedBy: row.updated_by ?? undefined,
  };
}

/**
 * Convierte entidad de dominio a objeto para persistencia (snake_case).
 */
export function toPersistence(drug: Drug): Record<string, unknown> {
  return {
    id: drug.id,
    slug: drug.slug,
    generic_name: drug.genericName,
    trade_name: drug.tradeName ?? null,
    category: drug.category,
    line: drug.line,
    frequency: drug.frequency,
    presentation: drug.presentation,
    adult_dose: drug.adultDose,
    pediatric_dose: drug.pediatricDose ?? null,
    routes: [...drug.routes],
    dilution: drug.dilution ?? null,
    indications: [...drug.indications],
    contraindications: [...drug.contraindications],
    side_effects: drug.sideEffects ?? null,
    antidote: drug.antidote ?? null,
    notes: [...drug.notes],
    critical_points: [...drug.criticalPoints],
    source: drug.source ?? null,
    status: drug.status.toString(),
    version: drug.version,
    latest_version: drug.latestVersion,
    created_by: drug.createdBy,
    updated_by: drug.updatedBy ?? drug.createdBy,
  };
}