package cmd

import (
	"fmt"
	"github.com/jroimartin/gocui"
	"github.com/nsf/termbox-go"
	"log"
	"net"
	"time"
)

func ui(conn net.Conn) {
	g, err := gocui.NewGui(gocui.OutputNormal)
	if err != nil {
		log.Panicln(err)
	}
	defer g.Close()
	g.SetManagerFunc(layout)
	g.Mouse = true
	g.Cursor = true
	initKeybindings(g)

	go listener(g, conn)

	if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
		log.Panicln(err)
	}
}

func listener(g *gocui.Gui, conn net.Conn) {
	time.Sleep(time.Second)
	chatbox, err := g.View("chatbox")
	if err != nil {
		log.Panicln(err)
	}
	for {
		reply := make([]byte, 2048)
		_, err := conn.Read(reply)
		if err != nil {
			g.Close()
			log.Fatalf("Server closed connection\n")
		}

		fmt.Fprintln(chatbox, string(reply))
		termbox.Interrupt()
	}
}

func quit(*gocui.Gui, *gocui.View) error {
	return gocui.ErrQuit
}

func initKeybindings(g *gocui.Gui) error {
	if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
		log.Panicln(err)
	}

	if err := g.SetKeybinding("button", gocui.MouseLeft, gocui.ModNone, sendmsg); err != nil {
		log.Panicln(err)
	}

	if err := g.SetKeybinding("textarea", gocui.KeyEnter, gocui.ModNone, sendmsg); err != nil {
		log.Panicln(err)
	}
	return nil
}

func layout(g *gocui.Gui) error {
	maxX, maxY := g.Size()

	if chatbox, err := g.SetView("chatbox", 2, 1, maxX/2+40, maxY-6); err != nil {
		if err != gocui.ErrUnknownView {
			return err
		}
		chatbox.Title = "Chat Box"
	}

	if button, err := g.SetView("button", maxX/2+32, maxY-4, maxX/2+40, maxY-2); err != nil {
		if err != gocui.ErrUnknownView {
			return err
		}
		//button.BgColor = gocui.ColorRed
		button.Wrap = true
		button.Frame = true
		fmt.Fprintln(button, "Send it")
	}

	if textarea, err := g.SetView("textarea", 2, maxY-4, maxX/2+28, maxY-2); err != nil {
		if err != gocui.ErrUnknownView {
			return err
		}
		if _, err := g.SetCurrentView("textarea"); err != nil {
			log.Panicln(err)
		}
		textarea.Title = "Send message"
		textarea.Wrap = true
		textarea.Editable = true
	}

	if currentUsers, err := g.SetView("currentUsers", maxX/2+42, 1, maxX-6, maxY-6); err != nil {
		if err != gocui.ErrUnknownView {
			return err
		}
		currentUsers.Title = "Connected users"
	}

	return nil
}