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

package source

import (
_	"context"
_	"encoding/json"
_	"fmt"
_	"gopkg.in/yaml.v3"
	"net/url"
_	"path/filepath"
	"decl/internal/resource"
_	"os"
_	"io"
	"log/slog"
)

type Package struct {
	PackageType resource.PackageType `yaml:"type" json:"type"`
}

func NewPackage() *Package {
	return &Package{ PackageType: resource.SystemPackageType }
}

func init() {
	SourceTypes.Register([]string{"package"}, func(u *url.URL) DocSource {
		p := NewPackage()
		return p
	})

}

func (p *Package) Type() string { return "package" }

func (p *Package) ExtractResources(filter ResourceSelector) ([]*resource.Document, error) {
	documents := make([]*resource.Document, 0, 100)

	slog.Info("package source ExtractResources()", "package", p) 
	installedPackages := make([]*resource.Package, 0, 100)
	cmd := p.PackageType.NewReadPackagesCommand()
	if out, err := cmd.Execute(p); err == nil {
		slog.Info("package source ExtractResources()", "output", out)
		if exErr := cmd.Extractor(out, &installedPackages); exErr != nil {
			return documents, exErr
		}
		document := resource.NewDocument()
		for _, pkg := range installedPackages {
			if pkg == nil {
				pkg = resource.NewPackage()
			}
			pkg.PackageType = p.PackageType
		
			document.AddResourceDeclaration("package", pkg)
		}
		documents = append(documents, document)
	} else {
		slog.Info("package source ExtractResources()", "output", out, "error", err)
		return documents, err
	}
	return documents, nil
}