package settings

import (
	"encoding/json"
	"fmt"
	"strings"
)

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See NOTICE.txt in the project root for license information.

type Setting interface {
	Setting() BaseSettingImpl
}

var _ Setting = BaseSettingImpl{}

type BaseSettingImpl struct {
	Id   *string      `json:"id,omitempty"`
	Kind SettingsKind `json:"kind"`
	Name *string      `json:"name,omitempty"`
	Type *string      `json:"type,omitempty"`
}

func (s BaseSettingImpl) Setting() BaseSettingImpl {
	return s
}

var _ Setting = RawSettingImpl{}

// RawSettingImpl is returned when the Discriminated Value doesn't match any of the defined types
// NOTE: this should only be used when a type isn't defined for this type of Object (as a workaround)
// and is used only for Deserialization (e.g. this cannot be used as a Request Payload).
type RawSettingImpl struct {
	setting BaseSettingImpl
	Type    string
	Values  map[string]interface{}
}

func (s RawSettingImpl) Setting() BaseSettingImpl {
	return s.setting
}

func UnmarshalSettingImplementation(input []byte) (Setting, error) {
	if input == nil {
		return nil, nil
	}

	var temp map[string]interface{}
	if err := json.Unmarshal(input, &temp); err != nil {
		return nil, fmt.Errorf("unmarshaling Setting into map[string]interface: %+v", err)
	}

	var value string
	if v, ok := temp["kind"]; ok {
		value = fmt.Sprintf("%v", v)
	}

	if strings.EqualFold(value, "taginheritance") {
		var out TagInheritanceSetting
		if err := json.Unmarshal(input, &out); err != nil {
			return nil, fmt.Errorf("unmarshaling into TagInheritanceSetting: %+v", err)
		}
		return out, nil
	}

	var parent BaseSettingImpl
	if err := json.Unmarshal(input, &parent); err != nil {
		return nil, fmt.Errorf("unmarshaling into BaseSettingImpl: %+v", err)
	}

	return RawSettingImpl{
		setting: parent,
		Type:    value,
		Values:  temp,
	}, nil

}
