package cmd

import (
	"accorder/pkg/calibre"
	"encoding/xml"
	"fmt"
	"log"
	"strconv"
	"strings"

	"github.com/araddon/dateparse"
	"github.com/beevik/etree"
	"github.com/spf13/cobra"
)

func ImportZoteroRDF(cmd *cobra.Command) {

	zoteroRDFPath := CliFlagValue(cmd, "import-zotero")
	doc := etree.NewDocument()
	if err := doc.ReadFromFile(zoteroRDFPath); err != nil {
		panic(err)
	}
	root := doc.SelectElement("rdf:RDF")
	attachmentsIDs := map[string]bool{}
	for _, attachmentNode := range root.FindElements("[name()='link:type']") {
		var bookOpf calibre.BookOpfW
		var zoteroItem ZoteroItem

		attachmentID := attachmentNode.Parent().SelectAttr("rdf:about").Value
		if attachmentNode.Text() == "text/html" || attachmentsIDs[attachmentID] {
			continue
		}

		bibliographyNode := root.FindElement(fmt.Sprintf("[@rdf:resource='%s']", attachmentID)).Parent().Copy()

		newDoc := etree.NewDocument()
		zoteroUnion := newDoc.CreateElement("zoteroItem")

		attachmentsQuery := bibliographyNode.FindElements("[name()='link:link']")
		itemAttachments := zoteroUnion.CreateElement("attachments")
		mimeTypeMap := make(map[string]bool)
		for _, attachment := range attachmentsQuery {
			attachmentID := attachment.SelectAttr("rdf:resource").Value
			zAttachment := root.FindElement(fmt.Sprintf("[@rdf:about='%s']", attachmentID))
			mimeType := zAttachment.FindElement("[name()='link:type']").Text()
			if mimeType != "text/html" {
				if !mimeTypeMap[mimeType] {
					attachmentsIDs[attachmentID] = true
					filePath := zAttachment.FindElement("[name()='rdf:resource']").SelectAttr("rdf:resource").Value
					attachment := itemAttachments.CreateElement("attachment")
					attachment.SetText(filePath)
					attachment.CreateAttr("mimeType", mimeType)
					mimeTypeMap[mimeType] = true
				} else {
					fmt.Println("DUPLICATE mimeType:", mimeType, attachmentID)
				}
			}
		}

		dateQuery := bibliographyNode.FindElement("[name()='dc:date']")
		if dateQuery != nil {
			dateElement := zoteroUnion.CreateElement("date")
			date, err := dateparse.ParseAny(dateQuery.Text())
			if err == nil {
				formattedDate := date.Format("2006-01-02")
				dateElement.CreateText(formattedDate)

				bookOpf.Metadata.Published = formattedDate
			} else {
				newDateQuery := fmt.Sprintf("1 %s", dateQuery.Text())
				newDate, err := dateparse.ParseAny(newDateQuery)
				if err == nil {
					newFormattedDate := newDate.Format("2006-01-02")
					dateElement.CreateText(newFormattedDate)
					bookOpf.Metadata.Published = newFormattedDate
				} else {
					lastChanceDate := dateQuery.Text()[len(dateQuery.Text())-4:]
					year, err := strconv.Atoi(lastChanceDate)
					if err == nil {
						justYear := fmt.Sprintf("%d-01-01", year)
						dateElement.CreateText(justYear)
						bookOpf.Metadata.Published = justYear
					} else {
						fmt.Println("ERROR parsing date...", err)
					}
				}
			}

		}

		publisherQuery := bibliographyNode.FindElement("[name()='foaf:name']")
		if publisherQuery != nil {
			publisherElement := zoteroUnion.CreateElement("publisher")
			publisher := publisherQuery.Text()
			publisherElement.CreateText(publisher)

			bookOpf.Metadata.Publisher = publisher
		}

		authorsQuery := bibliographyNode.FindElements("[name()='foaf:Person']")
		authors := zoteroUnion.CreateElement("authors")
		for _, authorNode := range authorsQuery {
			var firstName, surName string

			firstNameNode := authorNode.FindElement("[name()='foaf:givenName']")
			if firstNameNode != nil {
				firstName = firstNameNode.Text() + " "
			}
			surNameNode := authorNode.FindElement("[name()='foaf:surname']")
			if surNameNode != nil {
				surName = surNameNode.Text() + " "
			}
			fullName := strings.TrimSuffix(fmt.Sprintf("%s%s", firstName, surName), " ")
			authors.CreateElement("author").SetText(fullName)

			bookOpf.Metadata.Creators = append(bookOpf.Metadata.Creators, calibre.Creator{
				Role: "aut",
				Name: fullName,
			})
		}

		titleQuery := bibliographyNode.FindElement("[name()='dc:title']")
		if titleQuery != nil {
			titleNode := zoteroUnion.CreateElement("title")
			title := titleQuery.Text()
			titleNode.CreateText(title)

			bookOpf.Metadata.Title = title
		}

		descriptionQuery := bibliographyNode.FindElement("[name()='dcterms:abstract']")
		if descriptionQuery != nil {
			descriptionNode := zoteroUnion.CreateElement("description")
			description := descriptionQuery.Text()
			descriptionNode.CreateText(description)

			bookOpf.Metadata.Description = description
		}

		// identifiers
		identifiersQuery := bibliographyNode.FindElements("//[name()='dc:identifier'][not()]")
		if len(identifiersQuery) > 0 {
			for _, identifier := range identifiersQuery {
				identifierLine := identifier.Text()
				var id []string
				if strings.Contains(identifierLine, " ") {
					id = strings.Split(identifier.Text(), " ")
				}
				if len(id) > 1 && id[0] != "" {
					fmt.Println(bookOpf.Metadata.Title, "TYPE:", id[0], "VALUE:", id[1])
				}
			}
		}

		b, err := newDoc.WriteToBytes()
		if err != nil {
			log.Fatal(err)
		}

		if err := xml.Unmarshal(b, &zoteroItem); err != nil {
			log.Fatalln(err)
		}

		for _, a := range zoteroItem.Attachments.Attachment {
			// fmt.Println(a.Path, a.MimeType)
			_ = a
		}

		zi, _ := xml.MarshalIndent(zoteroItem, " ", " ")
		_ = zi
		// os.Stdout.Write(zi)
		// fmt.Println("\n~+~ ~ ~ ~ ~")

		bookOpf.Version = "2.0"
		bookOpf.Xmlns = "http://www.idpf.org/2007/opf"
		bookOpf.UniqueIdentifier = "uuid_id"
		bookOpf.Metadata.DC = "http://purl.org/dc/elements/1.1/"
		bookOpf.Metadata.OPF = "http://www.idpf.org/2007/opf"

		bookOpf.Metadata.Identifiers = append(bookOpf.Metadata.Identifiers, calibre.Identifier{
			Scheme: "calibre",
			Id:     "calibre_id",
			Value:  "-1",
		})

		bookOpfOutput, err := xml.MarshalIndent(bookOpf, " ", " ")
		if err != nil {
			log.Fatalln(err)
		}
		_ = bookOpfOutput
		// os.Stdout.Write(bookOpfOutput)
		// fmt.Println("\n ~ ~ ~ ~ ~")
	}
}