// +build darwin linux

package main

import (
	"fmt"
	"runtime"
	"strconv"

	"gitlab.wow.st/gmp/rand"
	//"gitlab.wow.st/gmp/nuklear/nk"
)

func main() {
	runtime.LockOSThread()

	length = 5
	buf = make([]byte,16)
	copy(buf,[]byte(fmt.Sprintf("%d\000",length)))
	fmt.Println(buf)
	fun = rand.Char

	generate()
	log(Info,"Staring event loop")
	uiInit()
	eventloop()
	log(Info,"Event loop returned")
}

const (
	maxlen int = 40
)

var (
	fun func() (byte,error)
	length int
	out []byte
	buf []byte
)

func generate() {
	if length <= 0 {
		return
	}
	buf, err := rand.Slice(fun,length)
	if err != nil {
		out = []byte("Error")
	}
	out = buf
}

func gfxMain() {
	if ctx == nil {
		log(Error,"gfxMain(): ctx is nil")
		return
	}

	if uiBegin() {
		row(4)
		if button("Char") {
			fun = rand.Char
			generate()
		}
		if button("Letter") {
			fun = rand.Letter
			generate()
		}
		if button("Digit") {
			fun = rand.Digit
			generate()
		}
		if button("Symbol") {
			fun = rand.Symbol
			generate()
		}
		row(3)
		if button("<") {
			length -= 1;
			if length == 0 {
				length = 1
			}
			copy(buf,[]byte(fmt.Sprintf("%d\000",length)))
			generate()
		}
		//label(fmt.Sprintf("%d",length),nk.TextAlignCentered | nk.TextAlignMiddle)
		editstring(buf)
		lastlen := length
		nb := make([]byte,0)
		for i := 0; i < len(buf); i++ {
			if buf[i] == 0 || buf[i] == '\n' {
				break
			}
			nb = append(nb,buf[i])
		}
		num,err := strconv.Atoi(string(nb))
		if err == nil {
			length = num
		}
		if length != lastlen {
			if length > maxlen {
				length = maxlen
			}
			copy(buf,[]byte(fmt.Sprintf("%d\000",length)))
			generate()
		}
		if button(">") {
			length += 1;
			if length > maxlen {
				length = maxlen
			}
			copy(buf,[]byte(fmt.Sprintf("%d\000",length)))
			generate()
		}
		row(1)
		if button(string(out)) {
			Clip(string(out))
		}
	}
	uiEnd()
}