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// Copyright 2021 Goldman Sachs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import meta::pure::mapping::*;
import meta::pure::router::metamodel::*;
import meta::pure::router::printer::*;

import meta::external::store::service::functions::pureToServiceStoreQuery::*;
import meta::external::store::service::executionPlan::generation::*;

Class meta::external::store::service::functions::pureToServiceStoreQuery::ServiceStoreQuery
{
   processingParam        :  String[0..1];
   processingValue        :  Value[0..1];
   processedParamValueMap :  Map[1];
   recordsToBeRead        :  Integer[0..1];
}

Class <> meta::external::store::service::functions::pureToServiceStoreQuery::Value
{
}

Class meta::external::store::service::functions::pureToServiceStoreQuery::VariableValue extends meta::external::store::service::functions::pureToServiceStoreQuery::Value
{
   var : VariableExpression[1];
}

Class meta::external::store::service::functions::pureToServiceStoreQuery::LiteralValue extends meta::external::store::service::functions::pureToServiceStoreQuery::Value
{
   value : Any[*];
}

Class meta::external::store::service::functions::pureToServiceStoreQuery::PureFunctionToServiceStoreFunctionPair extends Pair, meta::pure::metamodel::function::Function<{FunctionExpression[1], ServiceStoreQuery[1], Map>[1], DebugContext[1]->ServiceStoreQuery[1]}>>
{
}

function meta::external::store::service::functions::pureToServiceStoreQuery::toServiceStoreQuery(functionExpression:FunctionExpression[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let res = processValueSpecification($functionExpression, ^ServiceStoreQuery(processedParamValueMap = []->newMap()), $inScopeVars, $debug);
   assert($res.processingParam->isEmpty() && $res.processingValue->isEmpty(), | 'Unexpected result after processing query');
   $res;
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processValueSpecification(vs:ValueSpecification[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   $vs->evaluateAndDeactivate()->match(
             [
                 r:ExtendedRoutedValueSpecification[1] | $r.value->processValueSpecification($parentQuery, $inScopeVars, $debug),
                 r:FunctionRoutedValueSpecification[1] | $r.value->processValueSpecification($parentQuery, $inScopeVars, $debug),
                 f:FunctionExpression[1]               | $f->processFunctionExpression($parentQuery, $inScopeVars, $debug),
                 i:InstanceValue[1]                    | $i->processInstanceValue($parentQuery, $inScopeVars, $debug),
                 v:VariableExpression[1]               | $v->processVariableExpression($parentQuery, $inScopeVars, $debug)
             ])
}

function meta::external::store::service::functions::pureToServiceStoreQuery::mergeServiceStoreQueries(queries:ServiceStoreQuery[*], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let query = $queries->at(0);
   ^$query(processedParamValueMap = $queries.processedParamValueMap->map(m | $m->keyValues())->newMap());
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processInstanceValue(i:InstanceValue[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   $i.values->match([s:String[*]              | ^$parentQuery(processingValue = ^meta::external::store::service::functions::pureToServiceStoreQuery::LiteralValue(value = $s)),
                     n:Number[*]              | ^$parentQuery(processingValue = ^meta::external::store::service::functions::pureToServiceStoreQuery::LiteralValue(value = $n)),
                     d:Date[*]                | ^$parentQuery(processingValue = ^meta::external::store::service::functions::pureToServiceStoreQuery::LiteralValue(value = $d)),
                     b:Boolean[*]             | ^$parentQuery(processingValue = ^meta::external::store::service::functions::pureToServiceStoreQuery::LiteralValue(value = $b)),
                     v:ValueSpecification[*]  | $v->map(valueSpec| processValueSpecification($valueSpec, $parentQuery, $inScopeVars, $debug))->mergeServiceStoreQueries($debug),
                     l:LambdaFunction[1] | $l.expressionSequence->map(exp | $exp->processValueSpecification($parentQuery, $inScopeVars, $debug))->mergeServiceStoreQueries($debug),
                     a:Any[1]                 | $parentQuery
   ]);
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processVariableExpression(v:VariableExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   print(if(!$debug.debug, |'', | $debug.space+'>Process Variable Expression, name:' + $v.name + '\n'));
   ^$parentQuery(processingValue = ^VariableValue(var = $v));
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processFunctionExpression(f:FunctionExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let res  = $f.func->match ([p:Property[1] | ^$parentQuery(processingParam = $f->findAndReplacePropertyPathsInValueSpecification([]).second.values->toOne()),
                               q:QualifiedProperty[1] | ^$parentQuery(processingParam = $f->findAndReplacePropertyPathsInValueSpecification([]).second.values->toOne()),
                               a:Any[1]| processFunction($f, $parentQuery, $inScopeVars, $debug)
   ]);
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processFunction(f:FunctionExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let func = findSupportedFunction($f, getSupportedFunctions());
   if(!$func->isEmpty(),
      | $func->toOne()->eval($f, $parentQuery, $inScopeVars, $debug);,
      | fail($f.func.name->toOne() + ' is not Supported with service store !!'); $parentQuery;
   );
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processEqual(fe:FunctionExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let params = $fe.parametersValues->map(param |$param->processValueSpecification($parentQuery, $inScopeVars, $debug));
   let processingParam = $params.processingParam->toOne();
   let processingValue = $params.processingValue->toOne();
   ^$parentQuery(processedParamValueMap = $parentQuery.processedParamValueMap->keyValues()->concatenate(pair($processingParam, $processingValue))->newMap());
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processTake(fe:FunctionExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   let query = $fe.parametersValues->at(0)->processValueSpecification($parentQuery, $inScopeVars, $debug);
   assert($query.recordsToBeRead->isEmpty(), | 'Multiple take not yet supported with service store');

   let recordsToBeRead = $fe.parametersValues->at(1)->cast(@InstanceValue).values->toOne();
   assert($recordsToBeRead->instanceOf(Integer), | '->take with variable not supported in context of service store');

   ^$query(recordsToBeRead = $recordsToBeRead->cast(@Integer));
}

function meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp(fe:FunctionExpression[1], parentQuery:ServiceStoreQuery[1], inScopeVars:Map>[1], debug:DebugContext[1]):ServiceStoreQuery[1]
{
   $fe.parametersValues->map(param |$param->processValueSpecification($parentQuery, $inScopeVars, $debug))->mergeServiceStoreQueries($debug);
}

function meta::external::store::service::functions::pureToServiceStoreQuery::findSupportedFunction(fe:FunctionExpression[1], supportedFunctions:Map,meta::pure::metamodel::function::Function<{FunctionExpression[1], ServiceStoreQuery[1], Map>[1], DebugContext[1]->ServiceStoreQuery[1]}>>[1]):meta::pure::metamodel::function::Function<{FunctionExpression[1], ServiceStoreQuery[1], Map>[1], DebugContext[1]->ServiceStoreQuery[1]}>[0..1]
{
   $supportedFunctions->get($fe.func)
}

function meta::external::store::service::functions::pureToServiceStoreQuery::getSupportedFunctions():Map,meta::pure::metamodel::function::Function<{FunctionExpression[1], ServiceStoreQuery[1], Map>[1], DebugContext[1]->ServiceStoreQuery[1]}>>[1]
{
   newMap([
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::boolean::and_Boolean_1__Boolean_1__Boolean_1_,second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::boolean::equal_Any_MANY__Any_MANY__Boolean_1_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processEqual_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::boolean::eq_Any_1__Any_1__Boolean_1_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processEqual_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::lang::eval_Function_1__T_n__V_m_,second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::lang::eval_Function_1__V_m_,second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::filter_T_MANY__Function_1__T_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::getAll_Class_1__T_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::graphFetch::execution::graphFetch_T_MANY__RootGraphFetchTree_1__T_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::graphFetch::execution::graphFetch_T_MANY__RootGraphFetchTree_1__Integer_1__T_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::graphFetch::execution::graphFetchChecked_T_MANY__RootGraphFetchTree_1__Checked_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::graphFetch::execution::graphFetchChecked_T_MANY__RootGraphFetchTree_1__Integer_1__Checked_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::map_T_MANY__Function_1__V_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::map_T_m__Function_1__V_m_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::map_T_$0_1$__Function_1__V_$0_1$_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::collection::take_T_MANY__Integer_1__T_MANY_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processTake_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_),
      ^PureFunctionToServiceStoreFunctionPair(first=meta::pure::functions::multiplicity::toOne_T_MANY__T_1_, second=meta::external::store::service::functions::pureToServiceStoreQuery::processNoOp_FunctionExpression_1__ServiceStoreQuery_1__Map_1__DebugContext_1__ServiceStoreQuery_1_)
   ])
}