import * as repo from './repository.js';
import * as activitiesRepo from '../activities/repository.js';
import * as projectsRepo from '../projects/repository.js';
import { canWriteActivity, recalcFromTasks } from '../activities/service.js';
import { canReadProject } from '../projects/service.js';
import { HttpError } from '../../utils/http.js';
import { requireEditVersion, requireUpdated } from '../../utils/editVersion.js';
import { logAudit } from '../../utils/audit.js';

async function requireActivityAccess(activityId, currentUser) {
  const activity = await activitiesRepo.findById(activityId);
  if (!activity) throw new HttpError(404, 'Actividad no encontrada');
  const project = await projectsRepo.findById(activity.project_id);
  if (!(await canWriteActivity(currentUser, project, activity))) {
    throw new HttpError(403, 'No tienes permisos sobre esta actividad');
  }
  return activity;
}

export async function listByActivity(activityId, currentUser) {
  const activity = await activitiesRepo.findById(activityId);
  if (!activity) throw new HttpError(404, 'Actividad no encontrada');
  const project = await projectsRepo.findById(activity.project_id);
  if (!(await canReadProject(currentUser, project))) throw new HttpError(404, 'Actividad no encontrada');
  return repo.findByActivity(activityId);
}

export async function listTrash(activityId, currentUser) {
  await requireActivityAccess(activityId, currentUser);
  return repo.findTrashByActivity(activityId);
}

export async function createTask(activityId, payload, currentUser) {
  await requireActivityAccess(activityId, currentUser);
  if (!payload.name) throw new HttpError(400, 'El nombre es obligatorio');
  const task = await repo.create(activityId, payload);
  await logAudit({ userId: currentUser.id, action: 'create', entityType: 'task', entityId: task.id });
  const counts = await repo.countsByActivity(activityId);
  await recalcFromTasks(activityId, counts.done, counts.total);
  return task;
}

export async function updateTask(id, payload, currentUser) {
  const task = await repo.findById(id);
  if (!task) throw new HttpError(404, 'Tarea no encontrada');
  await requireActivityAccess(task.activity_id, currentUser);
  if (!payload.name) throw new HttpError(400, 'El nombre es obligatorio');
  requireEditVersion(payload.editVersion);
  const updated = requireUpdated(await repo.update(id, payload));
  await logAudit({ userId: currentUser.id, action: 'update', entityType: 'task', entityId: id });
  return updated;
}

export async function setTaskDone(id, isDone, currentUser) {
  const task = await repo.findById(id);
  if (!task) throw new HttpError(404, 'Tarea no encontrada');
  await requireActivityAccess(task.activity_id, currentUser);
  const updated = await repo.setDone(id, isDone);
  await logAudit({ userId: currentUser.id, action: isDone ? 'complete' : 'reopen', entityType: 'task', entityId: id });
  const counts = await repo.countsByActivity(task.activity_id);
  await recalcFromTasks(task.activity_id, counts.done, counts.total);
  return updated;
}

// Nuevo orden manual (arrastrar con el mouse): mismo permiso que crear/editar tareas de la actividad.
export async function reorderTasks(activityId, ids, currentUser) {
  await requireActivityAccess(activityId, currentUser);
  if (!Array.isArray(ids) || ids.length === 0) throw new HttpError(400, 'Falta el orden de tareas');
  await repo.reorder(activityId, ids);
  return repo.findByActivity(activityId);
}

export async function removeTask(id, currentUser) {
  const task = await repo.findById(id);
  if (!task) throw new HttpError(404, 'Tarea no encontrada');
  await requireActivityAccess(task.activity_id, currentUser);
  await repo.softDelete(id, currentUser.id);
  await logAudit({ userId: currentUser.id, action: 'delete', entityType: 'task', entityId: id });
  const counts = await repo.countsByActivity(task.activity_id);
  await recalcFromTasks(task.activity_id, counts.done, counts.total);
}

export async function restoreTask(id, currentUser) {
  const task = await repo.findById(id, { includeDeleted: true });
  if (!task || !task.deleted_at) throw new HttpError(404, 'Tarea no encontrada en la papelera');
  await requireActivityAccess(task.activity_id, currentUser);
  await repo.restore(id);
  await logAudit({ userId: currentUser.id, action: 'restore', entityType: 'task', entityId: id });
  const counts = await repo.countsByActivity(task.activity_id);
  await recalcFromTasks(task.activity_id, counts.done, counts.total);
}