// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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.

package preparers

import (
	"fmt"
	"sync"

	pb "beam.apache.org/playground/backend/internal/api/v1"
	"beam.apache.org/playground/backend/internal/validators"
)

// Preparer is used to make preparations with file with code.
type Preparer struct {
	Prepare func(args ...interface{}) error
	Args    []interface{}
}

type Preparers struct {
	functions *[]Preparer
}

func (preparers *Preparers) GetPreparers() *[]Preparer {
	return preparers.functions
}

// PreparersBuilder struct
type PreparersBuilder struct {
	preparers *Preparers
	filePath  string
	params    map[string]string
}

// NewPreparersBuilder constructor for PreparersBuilder
func NewPreparersBuilder(filePath string, params map[string]string) *PreparersBuilder {
	return &PreparersBuilder{preparers: &Preparers{functions: &[]Preparer{}}, filePath: filePath, params: params}
}

// Build builds preparers from PreparersBuilder
func (builder *PreparersBuilder) Build() *Preparers {
	return builder.preparers
}

func (builder *PreparersBuilder) AddPreparer(newPreparer Preparer) {
	*builder.preparers.functions = append(*builder.preparers.functions, newPreparer)
}

// GetPreparers returns slice of preparers.Preparer according to sdk
func GetPreparers(sdk pb.Sdk, filepath string, valResults *sync.Map, prepareParams map[string]string) (*[]Preparer, error) {
	isUnitTest, ok := valResults.Load(validators.UnitTestValidatorName)
	if !ok {
		return nil, fmt.Errorf("GetPreparers:: No information about unit test validation result")
	}
	builder := NewPreparersBuilder(filepath, prepareParams)
	switch sdk {
	case pb.Sdk_SDK_JAVA:
		isKata, ok := valResults.Load(validators.KatasValidatorName)
		if !ok {
			return nil, fmt.Errorf("GetPreparers:: No information about katas validation result")
		}
		GetJavaPreparers(builder, isUnitTest.(bool), isKata.(bool))
	case pb.Sdk_SDK_GO:
		GetGoPreparers(builder, isUnitTest.(bool))
	case pb.Sdk_SDK_PYTHON:
		GetPythonPreparers(builder, isUnitTest.(bool))
	case pb.Sdk_SDK_SCIO:
		GetScioPreparers(builder)
	default:
		return nil, fmt.Errorf("incorrect sdk: %s", sdk)
	}
	return builder.Build().GetPreparers(), nil
}