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

package builtin

import (
_	"context"
_	"encoding/json"
	"fmt"
_	"gopkg.in/yaml.v3"
_	"net/url"
_	"regexp"
_	"strings"
_	"os"
_	"io"
_	"compress/gzip"
_	"archive/tar"
_	"errors"
_	"path/filepath"
_	"decl/internal/codec"
	"decl/internal/data"
	"decl/internal/fs"
	"decl/internal/folio"
_ "decl/internal/resource"
_ "decl/internal/config"
_ "decl/internal/fan"
	"embed"
	"log/slog"
)

//go:embed documents/*.jx.yaml
var documentFiles embed.FS

func Load(uri folio.URI) (documents []data.Document, err error) {
	var extractor data.Converter
	var sourceResource data.Resource
	if extractor, err = folio.DocumentRegistry.ConverterTypes.New(string(uri)); err == nil {
		slog.Info("builtin.Load() extractor", "uri", uri, "error", err)

		targetDeclaration := folio.NewDeclaration()
		if err = targetDeclaration.NewResource((*string)(&uri)); err == nil {
			slog.Info("builtin.Load() extract many", "resource", sourceResource, "error", err, "uri", uri, "extractor", extractor)
			sourceResource = targetDeclaration.Attributes
			sourceResource.(data.FileResource).SetFS(documentFiles)
			documents, err = extractor.(data.ManyExtractor).ExtractMany(sourceResource, nil)
			slog.Info("builtin.Load() extract many", "resource", sourceResource, "error", err)
		}
	}
	return
}

func BuiltInDocuments() (documents []data.Document, err error) {

	docFs := fs.NewWalkDir(documentFiles, "", func(fsys fs.FS, path string, file fs.DirEntry) (walkErr error) {
		u := folio.URI(fmt.Sprintf("file://%s", path))
		slog.Info("BuiltInDocuments()", "file", u)

		if ! file.IsDir() {
			if loadDocs, loadErr := Load(u); loadErr == nil {
				documents = append(documents, loadDocs...)
			} else {
				err = loadErr
			}
		}
		return
	})

	docFs.Walk(nil)
	return documents, err
}