package plotter

import (
	"encoding/xml"
	"fmt"
	"io/ioutil"
	"os"
	"strconv"
	"strings"
)

type OneChar struct {
	Letter rune
	Root   XMLFont
	Path   []*Point
}

// XMLChar ...
type XMLChar struct {
	XMLName xml.Name `xml:"letter"`
	ID      string   `xml:"id,attr"`
	Paths   []string `xml:"path"`
	// XMLName xml.Name `xml:"bite"`
	// ID      rune     `xml:"id,attr"`
	// Paths   []XMLPath `xml:"path"`
}

// XMLFont ...
type XMLFont struct {
	XMLName xml.Name  `xml:"root"`
	Name    string    `xml:"name,attr"`
	Width   float64   `xml:"width,attr"`
	Height  float64   `xml:"height,attr"`
	Space   float64   `xml:"space,attr"`
	Letters []XMLChar `xml:"letter"`
}

type FontParser struct {
	Root     XMLFont
	ByLetter map[rune][]*OnePath
}

// Parse one font file
func (f *FontParser) Parse(fontPath string) {
	// Open our xmlFile
	xmlFile, err := os.Open(fontPath)
	// if we os.Open returns an error then handle it
	if err != nil {
		fmt.Println(err)
	}

	fmt.Println("Successfully Opened " + fontPath)
	// defer the closing of our xmlFile so that we can parse it later on
	defer xmlFile.Close()

	// read our opened xmlFile as a byte array.
	byteValue, _ := ioutil.ReadAll(xmlFile)

	xml.Unmarshal(byteValue, &f.Root)

	f.ByLetter = make(map[rune][]*OnePath)

	for _, letter := range f.Root.Letters {
		for _, path := range letter.Paths {
			onePath := OnePath{}
			onePath.Type = TypeText
			for _, pt := range strings.Split(path, " ") {
				ptSt := strings.Split(pt, ",")
				point := Point{}
				point.X, _ = strconv.ParseFloat(ptSt[0], 64)
				point.Y, _ = strconv.ParseFloat(ptSt[1], 64)
				onePath.List = append(onePath.List, &point)
			}
			letterID := []rune(letter.ID)[0]
			f.ByLetter[letterID] = append(f.ByLetter[letterID], &onePath)
		}
	}
}