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

package folio

import (
_	"errors"
_	"fmt"
	"net/url"
_	"strings"
	"decl/internal/types"
	"decl/internal/data"
	"decl/internal/mapper"
	"io/fs"
	"log/slog"
)

var (
)

type Registry struct {
	Schemas mapper.Store[URI, fs.FS]
	ConfigurationTypes *types.Types[data.Configuration] // Config Factory
	ResourceTypes *types.Types[data.Resource] // Resource Factory
	ConverterTypes *types.Types[data.Converter] // Converter Factory
	Documents []*Document
	UriMap mapper.Store[URI, *Document]
	DeclarationMap mapper.Store[*Declaration, *Document]
	ConfigNameMap mapper.Store[string, *Block]
	ConfigurationMap mapper.Store[*Block, *Document]
	DefaultSchema URI
}

func NewRegistry() *Registry {
	r := &Registry{
		ConfigurationTypes: types.New[data.Configuration](),
		ResourceTypes: types.New[data.Resource](),
		ConverterTypes: types.New[data.Converter](),
		Documents: make([]*Document, 0, 10),
		UriMap: mapper.New[URI, *Document](),
		DeclarationMap: mapper.New[*Declaration, *Document](),
		ConfigNameMap: mapper.New[string, *Block](),
		ConfigurationMap: mapper.New[*Block, *Document](),
		Schemas: mapper.New[URI, fs.FS](),
		DefaultSchema: schemaFilesUri,
	}
	r.Schemas[schemaFilesUri] = schemaFiles
	return r
}

func (r *Registry) Get(key *Declaration) (*Document, bool) {
	return r.DeclarationMap.Get(key)
}

func (r *Registry) Has(key *Declaration) (bool) {
	return r.DeclarationMap.Has(key)
}

func (r *Registry) HasDocument(key URI) bool {
	return r.UriMap.Has(key)
}

func (r *Registry) GetDocument(key URI) (*Document, bool) {
	return r.UriMap.Get(key)
}

func (r *Registry) SetDocument(key URI, value *Document) {
	r.UriMap.Set(key, value)
}

func (r *Registry) NewDocument(uri URI) (doc *Document) {
	doc = NewDocument(r)
	doc.URI = uri
	r.Documents = append(r.Documents, doc)
	if uri != "" {
		r.UriMap[uri] = doc
	}
	return
}

func (r *Registry) AppendParsedURI(uri *url.URL, documents []data.Document) (addedDocuments []data.Document, err error) {
	var convertUri data.Converter
	var sourceResource data.Resource

	slog.Info("folio.Registry.AppendParsedURI()", "uri", uri, "converter", r.ConverterTypes)
	if convertUri, err = r.ConverterTypes.NewFromParsedURI(uri); err == nil {
		if sourceResource, err = NewResourceFromParsedURI(uri, nil); err == nil {
			switch extractor := convertUri.(type) {
			case data.ManyExtractor:
				var docs []data.Document
				docs, err = extractor.ExtractMany(sourceResource, nil)
				slog.Info("folio.Registry.Append() - ExtractMany", "uri", uri, "source", sourceResource, "docs", docs, "error", err)
				documents = append(documents, docs...)
			case data.Extractor:
				var singleDocument data.Document
				singleDocument, err = extractor.Extract(sourceResource, nil)
				slog.Info("folio.Registry.Append() - Extract", "uri", uri, "source", sourceResource, "doc", singleDocument, "error", err)
				documents = append(documents, singleDocument)
			}
		}
	}
	slog.Info("folio.Registry.Append()", "uri", uri, "converter", r.ConverterTypes, "error", err)
	addedDocuments = documents
	return
}

func (r *Registry) Append(uri URI, documents []data.Document) (addedDocuments []data.Document, err error) {
	var convertUri data.Converter
	var sourceResource data.Resource

	slog.Info("folio.Registry.Append()", "uri", uri, "converter", r.ConverterTypes)
	if convertUri, err = r.ConverterTypes.New(string(uri)); err == nil {
		if sourceResource, err = uri.NewResource(nil); err == nil {
			switch extractor := convertUri.(type) {
			case data.ManyExtractor:
				var docs []data.Document
				docs, err = extractor.ExtractMany(sourceResource, nil)
				slog.Info("folio.Registry.Append() - ExtractMany", "uri", uri, "source", sourceResource, "docs", docs, "error", err)
				documents = append(documents, docs...)
			case data.Extractor:
				var singleDocument data.Document
				singleDocument, err = extractor.Extract(sourceResource, nil)
				slog.Info("folio.Registry.Append() - Extract", "uri", uri, "source", sourceResource, "doc", singleDocument, "error", err)
				documents = append(documents, singleDocument)
			}
		}
	}
	slog.Info("folio.Registry.Append()", "uri", uri, "converter", r.ConverterTypes, "error", err)
	addedDocuments = documents
	return
}

func (r *Registry) Load(uri URI) (documents []data.Document, err error) {
	documents = make([]data.Document, 0, 10)
	return r.Append(uri, documents)
}

func (r *Registry) LoadFromURL(uri *url.URL) (documents []data.Document, err error) {
	documents = make([]data.Document, 0, 10)
	return r.AppendParsedURI(uri, documents)
}