package cmd

import (
	"fmt"
	"os"

	"accorder/pkg/calibre"

	"github.com/beevik/etree"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var buildCmd = &cobra.Command{
	Use:   "build",
	Short: "Build standalone, portable webapp from Calibre library.",
	Long: `Build searchable, standalone, portable webapp against the local Calibre
library including all the metadata needed. It creates BROWSE_LIBRARY.html in
root directory of the local Calibre library. For search (authors, titles,
tags...) it uses rendered metadata from static/data{1-8}.js files.

Every time the directory path and/or librarian is provided it is saved in
the configuration file for the future use (therefore: 'accorder build SESSION'
should be enough for the next successful build).`,
	Args: cobra.ExactArgs(1),
	PreRun: func(cmd *cobra.Command, args []string) {
		session := args[0]

		for vipFlag, cliFlag := range map[string]string{
			"librarian_name": "librarian",
			"local_upload":   "directory",
			"library_uuid":   "library-uuid",
			"library_secret": "library-secret",
			"server_upload":  "server",
			"bucket_upload":  "bucket",
		} {
			viper.BindPFlag(fmt.Sprintf("%s.%s", session, vipFlag), cmd.Flags().Lookup(cliFlag))
		}
	},
	Run: func(cmd *cobra.Command, args []string) {
		session := args[0]

		MissingRequiredFlags(
			map[string]string{
				"librarian_name": "librarian",
				"local_upload":   "directory",
			},
			session,
			cmd,
		)

		libraryUUID := ViperValue(session, "library_uuid")
		librarySecret := ViperValue(session, "library_secret")
		calibrePath := ViperValue(session, "local_upload")
		librarianName := ViperValue(session, "librarian_name")
		jsonPath := CliFlagValue(cmd, "jsonpath")
		bibtexPath := CliFlagValue(cmd, "import-bibtex")

		doc := etree.NewDocument()
		if err := doc.ReadFromFile(bibtexPath); err != nil {
			panic(err)
		}
		root := doc.SelectElement("rdf:RDF")
		for _, z := range root.FindElements("[link:type]") {
			doc := etree.NewDocument()
			doc.SetRoot(z.Copy())
			fmt.Println("~ ~ ~ ~")
			fmt.Println(doc.WriteTo(os.Stdout))
			elm := root.FindElement(fmt.Sprintf("[@rdf:resource='%s']", z.SelectAttr("rdf:about").Value))
			doc.SetRoot(elm.Parent().Copy())
			fmt.Println("+++++")
			fmt.Println(doc.WriteTo(os.Stdout))
			fmt.Println("~ ~ ~ ~")
		}
		calibre.RenderStandaloneApp(calibrePath, librarianName, libraryUUID, librarySecret, jsonPath)
	},
}

func init() {
	rootCmd.AddCommand(buildCmd)

	buildCmd.Flags().StringP("directory", "d", "", "A local Calibre directory.")
	buildCmd.Flags().StringP("librarian", "l", "", "Librarian's name.")
	buildCmd.Flags().StringP("export-json", "e", "", "Path where to render all metadata into JSON.")
	buildCmd.Flags().StringP("import-bibtex", "i", "", "Import books from BibTex file into Calibre.")

	buildCmd.Flags().StringP("library-uuid", "u", "", "A library's UUID used if part of MotW.")
	buildCmd.Flags().StringP("library-secret", "p", "", "A password used if part of MotW.")
	buildCmd.Flags().StringP("server", "s", "minio.memoryoftheworld.org", "Server.")
	buildCmd.Flags().StringP("bucket", "b", "", "Server.")
	CustomHelpOutput(buildCmd)

	buildCmd.Flags().MarkHidden("library-uuid")
	buildCmd.Flags().MarkHidden("library-secret")
	buildCmd.Flags().MarkHidden("server")
	buildCmd.Flags().MarkHidden("bucket")
}