package api

import (
	"io/ioutil"
	"net/http"
	"os"
	"path/filepath"

	yaml "gopkg.in/yaml.v2"

	"gogs.carducci-dante.gov.it/andrea.fazzi/karmen/config"
	"gogs.carducci-dante.gov.it/andrea.fazzi/karmen/renderer"
)

type configYaml struct {
	Name string `yaml:"name"`
}

type Document struct {
	Config       configYaml
	ConfigFile   []byte
	TemplateFile []byte
}

func getDocumentsFromFS() []Document {
	documents := make([]Document, 0)
	err := filepath.Walk(config.DocumentRootDir, func(path string, f os.FileInfo, err error) error {
		if !f.IsDir() {
			if f.Name() == config.DocumentConfigFn {
				document := Document{}
				document.ConfigFile, err = ioutil.ReadFile(path)
				if err != nil {
					panic(err)
				}
				err = yaml.Unmarshal(document.ConfigFile, &document.Config)
				documents = append(documents, document)
			}
		}
		return nil
	})
	if err != nil {
		panic(err)
	}
	return documents
}

func documentsHandler() http.Handler {
	fn := func(w http.ResponseWriter, r *http.Request) {
		var data struct {
			Documents []Document
		}
		data.Documents = getDocumentsFromFS()
		// if err := orm.DB().Preload("Classes").Preload("Subjects").Find(&data.Teachers).Error; err != nil {
		// 	panic(err)
		// }
		// sort.Slice(data.Teachers, func(i, j int) bool {
		// 	return strings.ToLower(data.Teachers[i].Surname) < strings.ToLower(data.Teachers[j].Surname)
		// })
		if err := renderer.Render(w, "base", "documents", data); err != nil {
			panic(err)
		}
	}
	return http.HandlerFunc(fn)
}