import { AppError } from '../errors/app-error';
import {
  countAnomaliesParStatut,
  countEmpruntsParStatut,
  countMaterielsParStatut,
  countNotificationsNonLues,
  findActiviteRecente,
  findEmpruntsResponsable,
  findMaterielsResponsable,
  StatutCount,
  ActiviteResponsable,
  EmpruntResponsable,
  MaterielResponsable,
} from '../repositories/responsable.repository';
import { STATUT_EMPRUNT, STATUT_MATERIEL, StatutEmprunt, StatutMateriel } from '../models/enums';

export interface DashboardResponsableData {
  materiels: StatutCount[];
  emprunts: StatutCount[];
  anomalies: StatutCount[];
  notificationsNonLues: number;
  activiteRecente: ActiviteResponsable[];
}

export interface ListerEmpruntsResponsableFiltres {
  statut?: StatutEmprunt;
}

export interface ListerMaterielsResponsableFiltres {
  statut?: StatutMateriel;
  categorieId?: number;
  recherche?: string;
}

function verifierResponsable(roleCode: string): void {
  if (roleCode !== 'RESPONSABLE') {
    throw new AppError(403, 'Acces reserve au responsable materiel');
  }
}

export async function getDashboardResponsable(
  utilisateurId: number,
  roleCode: string,
  campusId: number,
): Promise<DashboardResponsableData> {
  verifierResponsable(roleCode);

  const [materiels, emprunts, anomalies, notificationsNonLues, activiteRecente] =
    await Promise.all([
      countMaterielsParStatut(campusId),
      countEmpruntsParStatut(campusId),
      countAnomaliesParStatut(campusId),
      countNotificationsNonLues(utilisateurId),
      findActiviteRecente(campusId, 10),
    ]);

  return {
    materiels,
    emprunts,
    anomalies,
    notificationsNonLues,
    activiteRecente,
  };
}

export function parseStatutEmprunt(value: unknown): StatutEmprunt | undefined {
  if (value === undefined) {
    return undefined;
  }
  if (typeof value !== 'string' || !(STATUT_EMPRUNT as readonly string[]).includes(value)) {
    throw new AppError(400, 'statut invalide');
  }
  return value as StatutEmprunt;
}

export function parseStatutMateriel(value: unknown): StatutMateriel | undefined {
  if (value === undefined) {
    return undefined;
  }
  if (typeof value !== 'string' || !(STATUT_MATERIEL as readonly string[]).includes(value)) {
    throw new AppError(400, 'statut invalide');
  }
  return value as StatutMateriel;
}

export function parseCategorieId(value: unknown): number | undefined {
  if (value === undefined) {
    return undefined;
  }

  const parsed = Number(value);
  if (!Number.isInteger(parsed) || parsed <= 0) {
    throw new AppError(400, 'categorieId invalide');
  }

  return parsed;
}

export function listerEmpruntsResponsable(
  roleCode: string,
  campusId: number,
  filtres: ListerEmpruntsResponsableFiltres,
): Promise<EmpruntResponsable[]> {
  verifierResponsable(roleCode);
  return findEmpruntsResponsable(campusId, filtres);
}

export function listerMaterielsResponsable(
  roleCode: string,
  campusId: number,
  filtres: ListerMaterielsResponsableFiltres,
): Promise<MaterielResponsable[]> {
  verifierResponsable(roleCode);
  return findMaterielsResponsable(campusId, filtres);
}