<?php

/**
 * OrangeHRM is a comprehensive Human Resource Management (HRM) System that captures
 * all the essential functionalities required for any enterprise.
 * Copyright (C) 2006 OrangeHRM Inc., http://www.orangehrm.com
 *
 * OrangeHRM is free software: you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * OrangeHRM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with OrangeHRM.
 * If not, see <https://www.gnu.org/licenses/>.
 */

namespace OrangeHRM\Leave\Api;

use OrangeHRM\Core\Api\CommonParams;
use OrangeHRM\Core\Api\V2\CrudEndpoint;
use OrangeHRM\Core\Api\V2\Endpoint;
use OrangeHRM\Core\Api\V2\EndpointCollectionResult;
use OrangeHRM\Core\Api\V2\EndpointResourceResult;
use OrangeHRM\Core\Api\V2\EndpointResult;
use OrangeHRM\Core\Api\V2\ParameterBag;
use OrangeHRM\Core\Api\V2\RequestParams;
use OrangeHRM\Core\Api\V2\Validator\ParamRule;
use OrangeHRM\Core\Api\V2\Validator\ParamRuleCollection;
use OrangeHRM\Core\Api\V2\Validator\Rule;
use OrangeHRM\Core\Api\V2\Validator\Rules;
use OrangeHRM\Entity\Employee;
use OrangeHRM\Leave\Api\Model\BulkLeaveEntitlementMatchingEmployeeModel;
use OrangeHRM\Leave\Api\Model\EmployeeLeaveEntitlementModel;
use OrangeHRM\Leave\Api\ValidationRules\LeaveTypeIdRule;
use OrangeHRM\Leave\Dto\LeaveEntitlementSearchFilterParams;
use OrangeHRM\Leave\Traits\Service\LeaveEntitlementServiceTrait;
use OrangeHRM\Leave\Traits\Service\LeavePeriodServiceTrait;
use OrangeHRM\Pim\Dto\EmployeeSearchFilterParams;
use OrangeHRM\Pim\Traits\Service\EmployeeServiceTrait;

class EmployeeLeaveEntitlementAPI extends Endpoint implements CrudEndpoint
{
    use EmployeeServiceTrait;
    use LeaveEntitlementServiceTrait;
    use LeavePeriodServiceTrait;

    public const PARAMETER_ENTITLEMENT = 'entitlement';
    public const PARAMETER_LOCATION_ID = 'locationId';
    public const PARAMETER_SUBUNIT_ID = 'subunitId';

    /**
     * @OA\Get(
     *     path="/api/v2/leave/employees/{empNumber}/leave-entitlements",
     *     tags={"Leave/Entitlements"},
     *     summary="Get an Employee's Leave Entitlement",
     *     operationId="get-an-employees-leave-entitlement",
     *     @OA\PathParameter(
     *         name="empNumber",
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="leaveTypeId",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="fromDate",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="number")
     *     ),
     *     @OA\Parameter(
     *         name="toDate",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="number")
     *     ),
     *     @OA\Parameter(
     *         name="entitlement",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Response(
     *         response="200",
     *         description="Success",
     *         @OA\JsonContent(
     *             @OA\Property(
     *                 property="data",
     *                 ref="#/components/schemas/Leave-EmployeeLeaveEntitlementModel"
     *             ),
     *             @OA\Property(property="meta", type="object")
     *         )
     *     ),
     *     @OA\Response(response="404", ref="#/components/responses/RecordNotFound")
     * )
     *
     * @inheritDoc
     */
    public function getOne(): EndpointResult
    {
        $empNumber = $this->getRequestParams()->getInt(
            RequestParams::PARAM_TYPE_ATTRIBUTE,
            CommonParams::PARAMETER_EMP_NUMBER
        );
        list($leaveTypeId, $fromDate, $toDate, $entitlement) = $this->getCommonQueryParams();
        $entitlements = $this->getLeaveEntitlementService()->getLeaveEntitlementDao()->getMatchingEntitlements(
            $empNumber,
            $fromDate,
            $toDate,
            $leaveTypeId
        );
        $employee = $this->getEmployeeService()->getEmployeeByEmpNumber($empNumber);
        return new EndpointResourceResult(
            EmployeeLeaveEntitlementModel::class,
            [$employee, $entitlements, $entitlement]
        );
    }

    /**
     * @inheritDoc
     */
    public function getValidationRuleForGetOne(): ParamRuleCollection
    {
        return new ParamRuleCollection(
            new ParamRule(CommonParams::PARAMETER_EMP_NUMBER, new Rule(Rules::IN_ACCESSIBLE_EMP_NUMBERS)),
            $this->getLeaveTypeIdRule(),
            $this->getFromDateRule(),
            $this->getToDateRule(),
            $this->getEntitlementRule(),
        );
    }

    /**
     * @OA\Get(
     *     path="/api/v2/leave/employees/leave-entitlements",
     *     tags={"Leave/Entitlements"},
     *     summary="List an Employee's Leave Entitlements",
     *     operationId="list-an-employees-leave-entitlements",
     *     @OA\Parameter(
     *         name="leaveTypeId",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="fromDate",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="number")
     *     ),
     *     @OA\Parameter(
     *         name="toDate",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="number")
     *     ),
     *     @OA\Parameter(
     *         name="entitlement",
     *         in="query",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="locationId",
     *         in="query",
     *         required=false,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="subunitId",
     *         in="query",
     *         required=false,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Parameter(
     *         name="sortField",
     *         in="query",
     *         required=false,
     *         @OA\Schema(type="string", enum=EmployeeSearchFilterParams::ALLOWED_SORT_FIELDS)
     *     ),
     *     @OA\Parameter(ref="#/components/parameters/sortOrder"),
     *     @OA\Parameter(ref="#/components/parameters/limit"),
     *     @OA\Parameter(ref="#/components/parameters/offset"),
     *     @OA\Response(
     *         response="200",
     *         description="Success",
     *         @OA\JsonContent(
     *             @OA\Property(
     *                 property="data",
     *                 ref="#/components/schemas/Leave-BulkLeaveEntitlementMatchingEmployeeModel"
     *             ),
     *             @OA\Property(property="meta",
     *                 type="object",
     *                 @OA\Property(property="total", type="integer")
     *             )
     *         )
     *     ),
     *     @OA\Response(response="404", ref="#/components/responses/RecordNotFound")
     * )
     *
     * @inheritDoc
     */
    public function getAll(): EndpointResult
    {
        list($employees, $total) = $this->getMatchingEmployeesAndCount();
        $empNumbers = $this->getEmpNumbersByEmployees($employees);
        list($leaveTypeId, $fromDate, $toDate, $entitlement) = $this->getCommonQueryParams();

        $entitlementSearchFilterParams = new LeaveEntitlementSearchFilterParams();
        $entitlementSearchFilterParams->setEmpNumbers($empNumbers);
        $entitlementSearchFilterParams->setLeaveTypeId($leaveTypeId);
        $entitlementSearchFilterParams->setFromDate($fromDate);
        $entitlementSearchFilterParams->setToDate($toDate);
        // Since limit when fetching employee list
        $entitlementSearchFilterParams->setLimit(0);

        $entitlements = $this->getLeaveEntitlementService()
            ->getLeaveEntitlementDao()
            ->getLeaveEntitlements($entitlementSearchFilterParams);

        return new EndpointCollectionResult(
            BulkLeaveEntitlementMatchingEmployeeModel::class,
            [$employees, $entitlements, $entitlement],
            new ParameterBag([CommonParams::PARAMETER_TOTAL => $total])
        );
    }

    /**
     * @return array
     */
    private function getCommonQueryParams(): array
    {
        $leaveTypeId = $this->getRequestParams()->getInt(
            RequestParams::PARAM_TYPE_QUERY,
            LeaveCommonParams::PARAMETER_LEAVE_TYPE_ID
        );
        $currentLeavePeriod = $this->getLeavePeriodService()->getCurrentLeavePeriod();
        $fromDate = $this->getRequestParams()->getDateTime(
            RequestParams::PARAM_TYPE_QUERY,
            LeaveCommonParams::PARAMETER_FROM_DATE,
            null,
            $currentLeavePeriod->getStartDate()
        );
        $toDate = $this->getRequestParams()->getDateTime(
            RequestParams::PARAM_TYPE_QUERY,
            LeaveCommonParams::PARAMETER_TO_DATE,
            null,
            $currentLeavePeriod->getEndDate()
        );
        $entitlement = $this->getRequestParams()->getFloatOrNull(
            RequestParams::PARAM_TYPE_QUERY,
            self::PARAMETER_ENTITLEMENT,
        );
        return [$leaveTypeId, $fromDate, $toDate, $entitlement];
    }

    /**
     * @param Employee[] $employees
     * @return int[]
     */
    private function getEmpNumbersByEmployees(array $employees): array
    {
        return array_map(
            function (Employee $employee) {
                return $employee->getEmpNumber();
            },
            $employees
        );
    }

    /**
     * @return array array(Employee[], int)
     */
    private function getMatchingEmployeesAndCount(): array
    {
        $locationId = $this->getRequestParams()->getIntOrNull(
            RequestParams::PARAM_TYPE_QUERY,
            self::PARAMETER_LOCATION_ID
        );
        $subunitId = $this->getRequestParams()->getIntOrNull(
            RequestParams::PARAM_TYPE_QUERY,
            self::PARAMETER_SUBUNIT_ID
        );
        $employeeSearchFilterParams = new EmployeeSearchFilterParams();
        $employeeSearchFilterParams->setSubunitId($subunitId);
        $employeeSearchFilterParams->setLocationId($locationId);
        $this->setSortingAndPaginationParams($employeeSearchFilterParams);
        return [
            $this->getEmployeeService()->getEmployeeList($employeeSearchFilterParams),
            $this->getEmployeeService()->getEmployeeCount($employeeSearchFilterParams)
        ];
    }

    /**
     * @inheritDoc
     */
    public function getValidationRuleForGetAll(): ParamRuleCollection
    {
        return new ParamRuleCollection(
            $this->getLeaveTypeIdRule(),
            $this->getFromDateRule(),
            $this->getToDateRule(),
            $this->getEntitlementRule(),
            $this->getValidationDecorator()->notRequiredParamRule(
                new ParamRule(self::PARAMETER_LOCATION_ID, new Rule(Rules::POSITIVE))
            ),
            $this->getValidationDecorator()->notRequiredParamRule(
                new ParamRule(self::PARAMETER_SUBUNIT_ID, new Rule(Rules::POSITIVE))
            ),
            ...$this->getSortingAndPaginationParamsRules(EmployeeSearchFilterParams::ALLOWED_SORT_FIELDS)
        );
    }

    /**
     * @return ParamRule
     */
    private function getLeaveTypeIdRule(): ParamRule
    {
        return new ParamRule(
            LeaveCommonParams::PARAMETER_LEAVE_TYPE_ID,
            new Rule(Rules::INT_VAL),
            new Rule(Rules::POSITIVE),
            new Rule(LeaveTypeIdRule::class)
        );
    }

    /**
     * @return ParamRule
     */
    private function getFromDateRule(): ParamRule
    {
        $paramRule = new ParamRule(
            LeaveCommonParams::PARAMETER_FROM_DATE,
            new Rule(Rules::API_DATE),
            new Rule(
                Rules::LESS_THAN,
                [
                    $this->getRequestParams()->getDateTimeOrNull(
                        RequestParams::PARAM_TYPE_QUERY,
                        LeaveCommonParams::PARAMETER_TO_DATE
                    )
                ]
            )
        );
        return $this->getRequestParams()->has(RequestParams::PARAM_TYPE_QUERY, LeaveCommonParams::PARAMETER_TO_DATE)
            ? $paramRule : $this->getValidationDecorator()->notRequiredParamRule($paramRule);
    }

    /**
     * @return ParamRule
     */
    private function getToDateRule(): ParamRule
    {
        $paramRule = new ParamRule(LeaveCommonParams::PARAMETER_TO_DATE, new Rule(Rules::API_DATE));
        return $this->getRequestParams()->has(RequestParams::PARAM_TYPE_QUERY, LeaveCommonParams::PARAMETER_FROM_DATE)
            ? $paramRule : $this->getValidationDecorator()->notRequiredParamRule($paramRule);
    }

    /**
     * @return ParamRule
     */
    private function getEntitlementRule(): ParamRule
    {
        return $this->getValidationDecorator()->notRequiredParamRule(
            new ParamRule(self::PARAMETER_ENTITLEMENT, new Rule(Rules::ZERO_OR_POSITIVE))
        );
    }

    /**
     * @inheritDoc
     */
    public function create(): EndpointResult
    {
        throw $this->getNotImplementedException();
    }

    /**
     * @inheritDoc
     */
    public function getValidationRuleForCreate(): ParamRuleCollection
    {
        throw $this->getNotImplementedException();
    }

    /**
     * @inheritDoc
     */
    public function update(): EndpointResult
    {
        throw $this->getNotImplementedException();
    }

    /**
     * @inheritDoc
     */
    public function getValidationRuleForUpdate(): ParamRuleCollection
    {
        throw $this->getNotImplementedException();
    }

    /**
     * @inheritDoc
     */
    public function delete(): EndpointResult
    {
        throw $this->getNotImplementedException();
    }

    /**
     * @inheritDoc
     */
    public function getValidationRuleForDelete(): ParamRuleCollection
    {
        throw $this->getNotImplementedException();
    }
}
