import asyncHandler from 'express-async-handler';
import { Op, literal } from 'sequelize';
import { subject } from '@casl/ability';
import { NotFoundError, InvalidParameterError, InvalidOperationError } from '@tamanu/errors';
import { getCurrentDateTimeString, getDayBoundaries } from '@tamanu/utils/dateTime';
import config from 'config';
import { toPrimaryDateTimeString } from '@tamanu/shared/utils/primaryDateTime';
import { getPrimaryTimeZone } from '@tamanu/shared/utils/timeZoneCheck';
import {
  LAB_REQUEST_STATUSES,
  DOCUMENT_SIZE_LIMIT,
  DOCUMENT_SOURCES,
  NOTE_RECORD_TYPES,
  VITALS_DATA_ELEMENT_IDS,
  CHARTING_DATA_ELEMENT_IDS,
  IMAGING_REQUEST_STATUS_TYPES,
  TASK_STATUSES,
  SURVEY_TYPES,
  DASHBOARD_ONLY_TASK_TYPES,
} from '@tamanu/constants';
import {
  simpleGet,
  simpleGetList,
  permissionCheckingRouter,
  runPaginatedQuery,
  paginatedGetList,
  softDeletionCheckingRouter,
} from '@tamanu/shared/utils/crudHelpers';
import { add } from 'date-fns';
import { z } from 'zod';
import {
  deleteChartInstance,
  fetchAnswersWithHistory,
  fetchGraphData,
  fetchChartInstances,
} from '../../routeHandlers/charts';
import { keyBy } from 'lodash';
import { createEncounterSchema } from '@tamanu/shared/schemas/facility/requests/createEncounter.schema';
import { uploadAttachment } from '../../utils/uploadAttachment';
import { noteChangelogsHandler, noteListHandler } from '../../routeHandlers';
import { createPatientLetter } from '../../routeHandlers/createPatientLetter';
import { getLabRequestList } from '../../routeHandlers/labs';
import {
  deleteDocumentMetadata,
  deleteEncounter,
  deleteSurveyResponse,
} from '../../routeHandlers/deleteModel';
import { getPermittedSurveyIds } from '../../utils/getPermittedSurveyIds';
import { validate } from '../../utils/validate';
import { invoiceForResponse } from './invoice/invoiceForResponse';

export const encounter = softDeletionCheckingRouter('Encounter');

encounter.get('/:id', simpleGet('Encounter', { auditAccess: true }));
encounter.post(
  '/',
  asyncHandler(async (req, res) => {
    const {
      models,
      body: { facilityId, ...data },
      user,
    } = req;
    req.checkPermission('create', 'Encounter');

    const validatedBody = validate(createEncounterSchema, data);

    if (!validatedBody.endDate) {
      const existingOpenEncounterCount = await models.Encounter.count({
        where: {
          patientId: validatedBody.patientId,
          endDate: null,
          deletedAt: null,
        },
      });

      if (existingOpenEncounterCount > 0) {
        throw new InvalidOperationError(
          'This patient already has an active encounter. The active encounter must be discharged before a new active encounter can be created.',
        );
      }
    }

    const encounterObject = await models.Encounter.create({ ...validatedBody, actorId: user.id });

    await models.Invoice.automaticallyCreateForEncounter(
      encounterObject.id,
      encounterObject.encounterType,
      encounterObject.startDate,
      req.settings[facilityId],
    );

    if (data.dietIds) {
      const dietIds = JSON.parse(data.dietIds);
      await encounterObject.addDiets(dietIds);
    }
    res.send(encounterObject);
  }),
);

encounter.put(
  '/:id',
  asyncHandler(async (req, res) => {
    const { db, models, user, params } = req;
    const { referralId, id } = params;
    req.checkPermission('read', 'Encounter');
    const encounterObject = await models.Encounter.findByPk(id);
    if (!encounterObject) throw new NotFoundError();
    req.checkPermission('write', encounterObject);

    await db.transaction(async () => {
      let systemNote;

      if (req.body.discharge) {
        req.checkPermission('write', 'Discharge');
        if (!req.body.discharge.dischargerId) {
          // Only automatic discharges can have a null discharger ID
          throw new InvalidParameterError('A discharge must have a discharger.');
        }
        const discharger = await models.User.findByPk(req.body.discharge.dischargerId);
        if (!discharger) {
          throw new InvalidParameterError(
            `Discharger with id ${req.body.discharge.dischargerId} not found.`,
          );
        }
        systemNote = `Patient discharged by ${discharger.displayName}.`;

        const prescriptions = req.body.medications || {};
        for (const [prescriptionId, prescriptionValues] of Object.entries(prescriptions)) {
          const { quantity, repeats } = prescriptionValues;
          const prescription = await models.Prescription.findByPk(prescriptionId, {
            include: [
              {
                model: models.EncounterPrescription,
                as: 'encounterPrescription',
                attributes: ['encounterId'],
                required: false,
              },
              {
                model: models.PatientOngoingPrescription,
                as: 'patientOngoingPrescription',
                attributes: ['patientId'],
                required: false,
              },
            ],
          });

          if (!prescription || prescription.discontinued) continue;

          await prescription.update({ quantity, repeats });
          await models.EncounterPrescription.update(
            { isSelectedForDischarge: true },
            { where: { encounterId: id, prescriptionId: prescription.id } },
          );
          // If the medication is ongoing and not already in the patient's ongoing medications, we need to add it to the patient's ongoing medications
          if (prescription.isOngoing && prescription.encounterPrescription?.encounterId === id) {
            const existingPatientOngoingPrescription =
              await models.PatientOngoingPrescription.findPatientOngoingPrescriptionWithSameDetails(
                encounterObject.patientId,
                prescription,
              );

            if (existingPatientOngoingPrescription) continue;
            await models.PatientOngoingPrescription.create({
              patientId: encounterObject.patientId,
              prescriptionId: prescription.id,
            });
          }
        }
      }

      if (referralId) {
        const referral = await models.Referral.findByPk(referralId, { paranoid: false });
        if (referral && referral.deletedAt)
          throw new InvalidOperationError('Cannot update a deleted referral.');
        await referral.update({ encounterId: id });
      }

      if (req.body.locationId != null) {
        const location = await models.Location.findByPk(req.body.locationId);
        if (!location) {
          throw new InvalidOperationError('Invalid location specified');
        }
      }

      await encounterObject.update({ ...req.body, systemNote }, user);
      if (req.body.dietIds) {
        const dietIds = JSON.parse(req.body.dietIds);
        await encounterObject.setDiets(dietIds);
      }
    });
    res.send(encounterObject);
  }),
);

encounter.post(
  '/:id/notes',
  asyncHandler(async (req, res) => {
    const { models, body, params } = req;
    const { id } = params;
    req.checkPermission('write', 'Encounter');
    const owner = await models.Encounter.findByPk(id);
    if (!owner) {
      throw new NotFoundError();
    }
    req.checkPermission('write', owner);
    const note = await owner.createNote(body);

    res.send(note);
  }),
);

encounter.post(
  '/:id/documentMetadata',
  asyncHandler(async (req, res) => {
    const { models, params } = req;
    // TODO: figure out permissions with Attachment and DocumentMetadata
    req.checkPermission('write', 'DocumentMetadata');

    // Make sure the specified encounter exists
    const specifiedEncounter = await models.Encounter.findByPk(params.id);
    if (!specifiedEncounter) {
      throw new NotFoundError();
    }

    // Create file on the central server
    const { attachmentId, type, metadata } = await uploadAttachment(req, DOCUMENT_SIZE_LIMIT);

    const documentMetadataObject = await models.DocumentMetadata.create({
      ...metadata,
      attachmentId,
      type,
      encounterId: params.id,
      documentUploadedAt: getCurrentDateTimeString(),
      source: DOCUMENT_SOURCES.UPLOADED,
    });

    res.send(documentMetadataObject);
  }),
);

encounter.post('/:id/createPatientLetter', createPatientLetter('Encounter', 'encounterId'));

encounter.post(
  '/:id/pharmacyOrder',
  asyncHandler(async (req, res) => {
    const { db, models, params, body } = req;
    const { id } = params;
    req.checkPermission('write', 'Encounter');
    req.checkPermission('read', 'Medication');
    req.checkPermission('create', 'MedicationRequest');
    const encounterObject = await models.Encounter.findByPk(id);
    if (!encounterObject) throw new NotFoundError();

    const {
      orderingClinicianId,
      comments,
      isDischargePrescription,
      pharmacyOrderPrescriptions,
      facilityId,
      date,
    } = body;

    const prescriptionRecords = await models.Prescription.findAll({
      where: { id: pharmacyOrderPrescriptions.map(p => p.prescriptionId) },
      attributes: ['id', 'medicationId', 'quantity'],
    });

    const hasSensitive = await models.ReferenceDrug.hasSensitiveMedication(
      prescriptionRecords.map(p => p.medicationId),
    );

    if (hasSensitive) {
      req.checkPermission('read', 'SensitiveMedication');
    }

    const result = await db.transaction(async () => {
      const pharmacyOrder = await models.PharmacyOrder.create({
        orderingClinicianId,
        encounterId: id,
        comments,
        isDischargePrescription,
        date: date || getCurrentDateTimeString(),
        facilityId,
      });

      await models.PharmacyOrderPrescription.bulkCreate(
        pharmacyOrderPrescriptions.map(prescription => ({
          pharmacyOrderId: pharmacyOrder.id,
          prescriptionId: prescription.prescriptionId,
          quantity: prescription.quantity,
          repeats: prescription.repeats,
        })),
      );

      return pharmacyOrder;
    });

    res.send(result);
  }),
);

encounter.delete('/:id/documentMetadata/:documentMetadataId', deleteDocumentMetadata);

encounter.delete('/:id', deleteEncounter);

const encounterRelations = permissionCheckingRouter('read', 'Encounter');
encounterRelations.get(
  '/:id/discharge',
  asyncHandler(async (req, res) => {
    const {
      models: { Discharge },
      params,
    } = req;
    req.checkPermission('read', 'Discharge');

    const discharge = await Discharge.findOne({
      where: {
        encounterId: params.id,
      },
      include: Discharge.getFullReferenceAssociations(),
    });
    if (!discharge) throw new NotFoundError();
    await req.audit?.access?.({
      recordId: discharge.id,
      frontEndContext: params,
      model: Discharge,
    });

    const plain = discharge.get({ plain: true });
    plain.address = await discharge.address();
    res.send(plain);
  }),
);
encounterRelations.get('/:id/legacyVitals', simpleGetList('Vitals', 'encounterId'));
encounterRelations.get('/:id/diagnoses', simpleGetList('EncounterDiagnosis', 'encounterId'));
encounterRelations.get(
  '/:id/medications',
  asyncHandler(async (req, res) => {
    const { models, params, query, db, settings } = req;
    const { Prescription } = models;
    const {
      order = 'ASC',
      orderBy = 'medication.name',
      rowsPerPage,
      page,
      marDate,
      facilityId,
    } = query;

    req.checkPermission('list', 'Medication');

    const associations = Prescription.getListReferenceAssociations() || [];

    const medicationFilter = {};
    const canListSensitiveMedication = req.ability.can('list', 'SensitiveMedication');
    if (!canListSensitiveMedication) {
      medicationFilter['$medication.referenceDrug.is_sensitive$'] = false;
    }

    const baseQueryOptions = {
      where: medicationFilter,
      order: [
        [
          literal('CASE WHEN "discontinued" IS NULL OR "discontinued" = false THEN 1 ELSE 0 END'),
          'DESC',
        ],
        ...(orderBy ? [[...orderBy.split('.'), order.toUpperCase()]] : []),
        ['date', 'ASC'],
      ],

      include: [
        ...associations,
        {
          model: models.EncounterPrescription,
          as: 'encounterPrescription',
          include: {
            model: models.EncounterPausePrescription,
            as: 'pausePrescriptions',
            attributes: ['pauseDuration', 'pauseTimeUnit', 'pauseEndDate'],
            where: {
              pauseEndDate: {
                [Op.gt]: getCurrentDateTimeString(),
              },
            },
            required: false,
          },
          attributes: ['id', 'encounterId', 'isSelectedForDischarge'],
          where: {
            encounterId: params.id,
          },
        },
        {
          model: models.ReferenceData,
          as: 'medication',
          include: {
            model: models.ReferenceDrug,
            as: 'referenceDrug',
            attributes: ['referenceDataId', 'isSensitive'],
          },
        },
      ],
    };

    // Add medicationAdministrationRecords with condition for same day
    if (marDate) {
      req.checkPermission('list', 'MedicationAdministration');

      const facilityTimeZone = await settings[facilityId]?.get('facilityTimeZone');
      const primaryTimeZone = getPrimaryTimeZone(config);
      const boundaries = getDayBoundaries(marDate, primaryTimeZone, facilityTimeZone);
      const startOfMarDate = boundaries?.start ?? `${marDate} 00:00:00`;
      const endOfMarDate = boundaries?.end ?? `${marDate} 23:59:59`;
      baseQueryOptions.include.push({
        model: models.MedicationAdministrationRecord,
        as: 'medicationAdministrationRecords',
        where: {
          dueAt: {
            [Op.gte]: startOfMarDate,
            [Op.lte]: endOfMarDate,
          },
        },
        include: [
          {
            association: 'reasonNotGiven',
            attributes: ['id', 'name', 'type'],
          },
          {
            association: 'recordedByUser',
            attributes: ['id', 'displayName'],
          },
        ],
        required: false,
      });

      baseQueryOptions.where = {
        ...baseQueryOptions.where,
        startDate: {
          [Op.lte]: endOfMarDate,
        },
        [Op.and]: [
          {
            [Op.or]: [
              { discontinuedDate: { [Op.is]: null } },
              { discontinuedDate: { [Op.gt]: startOfMarDate } },
            ],
          },
          {
            [Op.or]: [{ endDate: null }, { endDate: { [Op.gt]: startOfMarDate } }],
          },
        ],
      };
    }

    const count = await Prescription.count({
      ...baseQueryOptions,
      distinct: true,
    });

    const prescriptions = await Prescription.findAll({
      ...baseQueryOptions,
      limit: rowsPerPage,
      offset: page && rowsPerPage ? page * rowsPerPage : undefined,
    });

    let responseData = prescriptions.map(p => p.forResponse());
    if (responseData.length > 0) {
      const prescriptionIds = responseData.map(p => p.id);
      const [lastOrderedRows] = await db.query(
        `
        SELECT pop.prescription_id, max(po.date) AS last_ordered_at
        FROM pharmacy_order_prescriptions pop
        INNER JOIN pharmacy_orders po ON po.id = pop.pharmacy_order_id
        WHERE pop.prescription_id IN (:prescriptionIds)
          AND pop.deleted_at IS NULL
          AND po.deleted_at IS NULL
        GROUP BY pop.prescription_id
      `,
        { replacements: { prescriptionIds } },
      );
      const lastOrderedAts = keyBy(lastOrderedRows, 'prescription_id');

      responseData = responseData.map(p => ({
        ...p,
        lastOrderedAt: lastOrderedAts[p.id]?.last_ordered_at,
      }));
    }

    res.send({ count, data: responseData });
  }),
);

encounterRelations.get('/:id/procedures', simpleGetList('Procedure', 'encounterId'));
encounterRelations.get(
  '/:id/labRequests',
  getLabRequestList('encounterId', {
    additionalFilters: {
      status: {
        [Op.notIn]: [LAB_REQUEST_STATUSES.DELETED, LAB_REQUEST_STATUSES.ENTERED_IN_ERROR],
      },
    },
  }),
);

encounterRelations.get('/:id/referral', simpleGetList('Referral', 'encounterId'));
encounterRelations.get('/:id/triages', simpleGetList('Triage', 'encounterId'));
encounterRelations.get(
  '/:id/documentMetadata',
  paginatedGetList('DocumentMetadata', 'encounterId'),
);
encounterRelations.get(
  '/:id/imagingRequests',
  asyncHandler(async (req, res) => {
    const { models, params, query } = req;
    const { ImagingRequest } = models;
    const { id: encounterId } = params;
    const {
      order = 'ASC',
      orderBy = 'createdAt',
      rowsPerPage,
      page,
      includeNotes: includeNotesStr = 'true',
      status,
    } = query;
    const includeNote = includeNotesStr === 'true';

    req.checkPermission('list', 'ImagingRequest');

    const associations = ImagingRequest.getListReferenceAssociations() || [];

    const baseQueryOptions = {
      where: {
        encounterId,
        status: status || {
          [Op.notIn]: [
            IMAGING_REQUEST_STATUS_TYPES.DELETED,
            IMAGING_REQUEST_STATUS_TYPES.ENTERED_IN_ERROR,
          ],
        },
      },
      order: orderBy ? [[...orderBy.split('.'), order.toUpperCase()]] : undefined,
      include: associations,
    };

    const count = await ImagingRequest.count({
      ...baseQueryOptions,
    });

    const objects = await ImagingRequest.findAll({
      ...baseQueryOptions,
      limit: rowsPerPage,
      offset: page && rowsPerPage ? page * rowsPerPage : undefined,
    });

    const data = await Promise.all(
      objects.map(async ir => {
        return {
          ...ir.forResponse(),
          ...(includeNote ? await ir.extractNotes() : undefined),
          areas: ir.areas.map(a => a.forResponse()),
          results: ir.results.map(result => result.forResponse()),
        };
      }),
    );

    res.send({ count, data });
  }),
);

encounterRelations.get('/:id/notes', noteListHandler(NOTE_RECORD_TYPES.ENCOUNTER));

encounterRelations.get(
  '/:id/notes/noteTypes',
  asyncHandler(async (req, res) => {
    const { models, params } = req;
    const encounterId = params.id;
    const noteTypeCounts = await models.Note.count({
      group: ['noteTypeId'],
      where: { recordId: encounterId, recordType: 'Encounter' },
    });
    const noteTypeToCount = {};
    noteTypeCounts.forEach(n => {
      noteTypeToCount[n.noteTypeId] = n.count;
    });
    res.send({ data: noteTypeToCount });
  }),
);

encounterRelations.get(
  '/:id/notes/:noteId/changelogs',
  noteChangelogsHandler(NOTE_RECORD_TYPES.ENCOUNTER),
);

encounterRelations.get(
  '/:id/invoice',
  asyncHandler(async (req, res) => {
    const { models, params } = req;
    const { Invoice, InvoicePriceList } = models;
    req.checkPermission('read', 'Invoice');
    const encounterId = params.id;
    const invoicePriceListId = await InvoicePriceList.getIdForPatientEncounter(encounterId);

    const invoiceRecord = await Invoice.findOne({
      where: { encounterId },
      include: Invoice.getFullReferenceAssociations(invoicePriceListId),
      order: [
        [{ model: models.InvoiceItem, as: 'items' }, 'orderDate', 'ASC'],
        [{ model: models.InvoiceItem, as: 'items' }, 'createdAt', 'ASC'],
        [{ model: models.InvoicePayment, as: 'payments' }, 'date', 'ASC'],
      ],
    });
    if (!invoiceRecord) {
      // Return null rather than a 404 as it is a valid scenario for there not to be an invoice
      return res.send(null);
    }

    await req.audit.access({
      recordId: invoiceRecord.id,
      frontEndContext: params,
      model: Invoice,
    });

    const responseRecord = invoiceForResponse(invoiceRecord);
    const priceList = await InvoicePriceList.findByPk(invoicePriceListId, { raw: true });
    res.send({ ...responseRecord, priceList });
  }),
);

const PROGRAM_RESPONSE_SORT_KEYS = {
  endTime: 'end_time',
  submittedBy: 'submitted_by',
  programName: 'program_name',
  surveyName: 'survey_name',
  resultText: 'result_text',
};

encounterRelations.get(
  '/:id/programResponses',
  asyncHandler(async (req, res) => {
    const { db, models, params, query } = req;
    req.checkPermission('list', 'SurveyResponse');
    const encounterId = params.id;
    const surveyType = 'programs';
    const { order = 'asc', orderBy = 'endTime' } = query;
    const sortKey = PROGRAM_RESPONSE_SORT_KEYS[orderBy] || PROGRAM_RESPONSE_SORT_KEYS.endTime;
    const sortDirection = order.toLowerCase() === 'asc' ? 'ASC' : 'DESC';

    const permittedSurveyIds = await getPermittedSurveyIds(req, models);

    if (!permittedSurveyIds.length) {
      res.send({
        data: [],
        count: 0,
      });
    }

    const { count, data } = await runPaginatedQuery(
      db,
      models.SurveyResponse,
      `
        SELECT COUNT(1) as count
        FROM
          survey_responses
          LEFT JOIN encounters
            ON (survey_responses.encounter_id = encounters.id)
          LEFT JOIN surveys
            ON (survey_responses.survey_id = surveys.id)
        WHERE
          survey_responses.encounter_id = :encounterId
        AND
          surveys.survey_type = :surveyType
        AND
          surveys.id IN (:surveyIds)
        AND
          encounters.deleted_at IS NULL
        AND
          survey_responses.deleted_at IS NULL
      `,
      `
        SELECT
          survey_responses.*,
          surveys.name as survey_name,
          programs.name as program_name,
          COALESCE(survey_user.display_name, encounter_user.display_name) as submitted_by,
          survey_responses.edited_time IS NOT NULL AS is_edited
        FROM
          survey_responses
          LEFT JOIN surveys
            ON (survey_responses.survey_id = surveys.id)
          LEFT JOIN programs
            ON (programs.id = surveys.program_id)
          LEFT JOIN encounters
            ON (encounters.id = survey_responses.encounter_id)
          LEFT JOIN users encounter_user
            ON (encounter_user.id = encounters.examiner_id)
          LEFT JOIN users survey_user
            ON (survey_user.id = survey_responses.user_id)
        WHERE
          survey_responses.encounter_id = :encounterId
        AND
          surveys.survey_type = :surveyType
        AND
          surveys.id IN (:surveyIds)
        AND
          survey_responses.deleted_at IS NULL
        AND
          encounters.deleted_at is null
        AND survey_responses.id NOT IN (SELECT survey_response_id FROM procedure_survey_responses)
        ORDER BY ${sortKey} ${sortDirection}
      `,
      { encounterId, surveyType, surveyIds: permittedSurveyIds },
      query,
    );

    res.send({
      count: parseInt(count, 10),
      data,
    });
  }),
);

encounterRelations.delete('/:id/programResponses/:surveyResponseId', deleteSurveyResponse);

encounterRelations.get(
  '/:id/vitals',
  fetchAnswersWithHistory({
    permissionAction: 'list',
    permissionNoun: 'Vitals',
  }),
);

encounterRelations.get(
  '/:id/graphData/vitals/:dataElementId',
  fetchGraphData({
    permissionAction: 'list',
    permissionNoun: 'Vitals',
    dateDataElementId: VITALS_DATA_ELEMENT_IDS.dateRecorded,
  }),
);

encounterRelations.get(
  '/:id/initialChart',
  asyncHandler(async (req, res) => {
    const { models, params } = req;
    const { id: encounterId } = params;
    const chartSurvey = await models.SurveyResponse.findAll({
      attributes: ['survey.*'],
      where: { encounterId },
      include: [
        {
          attributes: ['id', 'name'],
          required: true,
          model: models.Survey,
          as: 'survey',
          where: {
            surveyType: [SURVEY_TYPES.SIMPLE_CHART, SURVEY_TYPES.COMPLEX_CHART],
          },
        },
      ],
      order: [['survey', 'name', 'ASC']],
      group: [['survey.id']],
    });
    req.flagPermissionChecked();
    const allowedSurvey = chartSurvey.find(response =>
      req.ability.can('list', subject('Charting', { id: response.survey.id })),
    );

    res.send({
      data: allowedSurvey,
    });
  }),
);

encounterRelations.get(
  '/:id/graphData/charts/:dataElementId',
  fetchGraphData({
    permissionAction: 'read',
    permissionNoun: 'Charting',
    dateDataElementId: CHARTING_DATA_ELEMENT_IDS.dateRecorded,
  }),
);

encounterRelations.get(
  '/:id/charts/:surveyId',
  fetchAnswersWithHistory({
    permissionAction: 'read',
    permissionNoun: 'Charting',
  }),
);

const encounterTasksQuerySchema = z.object({
  order: z.preprocess(
    value => (typeof value === 'string' ? value.toUpperCase() : value),
    z.enum(['ASC', 'DESC']).optional().default('ASC'),
  ),
  orderBy: z.enum(['dueTime', 'name']).optional().default('dueTime'),
  statuses: z
    .array(z.enum(Object.values(TASK_STATUSES)))
    .optional()
    .default([TASK_STATUSES.TODO]),
  assignedTo: z.string().optional(),
  page: z.coerce.number().optional().default(0),
  rowsPerPage: z.coerce.number().optional().default(10),
});
encounterRelations.get(
  '/:id/tasks',
  asyncHandler(async (req, res) => {
    const { models, params } = req;
    const { Task } = models;
    const { id: encounterId } = params;

    const query = await encounterTasksQuerySchema.parseAsync(req.query);
    const { order, orderBy, assignedTo, statuses, page, rowsPerPage } = query;

    req.checkPermission('list', 'Tasking');

    const upcomingTasksTimeFrame = config.tasking?.upcomingTasksTimeFrame || 8;
    const baseQueryOptions = {
      where: {
        encounterId,
        status: { [Op.in]: statuses },
        dueTime: {
          [Op.lte]: toPrimaryDateTimeString(add(new Date(), { hours: upcomingTasksTimeFrame })),
        },
        taskType: {
          [Op.notIn]: DASHBOARD_ONLY_TASK_TYPES,
        },
        ...(assignedTo && {
          [Op.and]: literal(`
            EXISTS (
              SELECT 1 FROM "task_designations" AS td
              WHERE (
                "td"."designation_id" = :assignedTo
                AND "td"."task_id" = "Task"."id"
              )
            )
          `),
        }),
      },
      replacements: { assignedTo },
    };
    const queryResults = await Task.findAll({
      ...baseQueryOptions,
      order: [
        [orderBy, order.toUpperCase()],
        ['highPriority', 'DESC'],
        ['name', 'ASC'],
      ],
      limit: rowsPerPage,
      offset: page * rowsPerPage,
      include: [...Task.getFullReferenceAssociations(), 'parentTask'],
    });
    const results = queryResults.map(x => x.forResponse());

    const count = await Task.count(baseQueryOptions);
    res.send({ data: results, count });
  }),
);

encounterRelations.get(
  '/:id/charts/:chartSurveyId/chartInstances',
  fetchChartInstances({
    permissionAction: 'list',
  }),
);

encounterRelations.delete('/:id/chartInstances/:chartInstanceResponseId', deleteChartInstance());

encounter.use(encounterRelations);
