// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package data

import (
	"context"
	"errors"
	"decl/internal/codec"
	"io"
	"decl/internal/mapper"
)

var (
	ErrEmptyDocument error = errors.New("Document contains no resources")
)

type Serializer interface {
	JSON() ([]byte, error)
	YAML() ([]byte, error)
	PB() ([]byte, error)
	Generate(w io.Writer) (error)
}

type Loader interface {
	LoadString(string, codec.Format) (error)
	Load([]byte, codec.Format) (error)
	LoadReader(io.ReadCloser, codec.Format) (error)
}

type DocumentGetter interface {
	GetDocument() Document
}

type DocumentStateTransformer interface {
	Apply(overrideState string) error
}

type Document interface {
	GetURI() string
	Serializer
	Loader
	Validator
	mapper.Mapper

	NewResource(uri string) (Resource, error)
	NewResourceFromParsedURI(uri URIParser) (Resource, error)
	AddDeclaration(Declaration)
	AddResourceDeclaration(resourceType string, resourceDeclaration Resource)

	Types() (TypesRegistry[Resource])
//	Resources() []Declaration

	SetConfig(config Document)
	ConfigDoc() Document

	HasConfig(string) bool
	GetConfig(string) Block

	Apply(state string) error
	Len() int
	ResolveIds(ctx context.Context)
	Filter(filter DeclarationSelector) []Declaration
	Declarations() []Declaration

	CheckConstraints() bool
	Failures() int

	ImportedDocuments() []Document

	ConfigFilter(filter BlockSelector) []Block
	AppendConfigurations([]Document)
	Diff(with Document, output io.Writer) (returnOutput string, diffErr error)
	DiffState(output io.Writer) (returnOutput string, diffErr error)
	Clone() Document
	AddError(error)
}