// PresentationApp project main.go
package main

import "C"

import (
	"fmt"
	//"image"
	"log"
	"os"
	"path/filepath"

	"github.com/go-gl/gl/v2.1/gl"
	"github.com/go-gl/glfw/v3.1/glfw"
	"github.com/kardianos/osext"
	"github.com/lordwelch/qml"
)

type cell struct {
	text string
	//img   image.Image
	qmlcell qml.Object
	index   int
}
type slide []cell

var (
	path      string
	textEdit  qml.Object
	cellQml   qml.Object
	window    *qml.Window
	win       *glfw.Window
	slides    slide
	err       error
	monitors  []*glfw.Monitor
	drawSlide func()
)

func main() {

	if err = qml.Run(run); err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}

	defer glfw.Terminate()

}

/*func init() {
	// GLFW event handling must run on the main OS thread
	//runtime.LockOSThread()
}*/

func run() error {
	var mainQml qml.Object

	engine := qml.NewEngine()
	path, err = osext.ExecutableFolder()
	path = filepath.Clean(path + "/../src/github.com/lordwelch/PresentationApp/")

	mainQml, err = engine.LoadFile(path + "/main.qml")
	if err != nil {
		return err
	}

	cellQml, err = engine.LoadFile(path + "/qml/cell.qml")
	if err != nil {
		return err
	}

	window = mainQml.CreateWindow(nil)

	textEdit = window.ObjectByName("textEdit")
	slides.addCell()
	setSignals()

	window.Show()
	qml.RunMain(func() {
		glInit()
	})

	window.Wait()
	return nil
}

func checkMon() {
	monitors = glfw.GetMonitors()
	if i := len(monitors); i < 2 {
		fmt.Println("You only have 1 monitor!!!!!!!!!!! :-P")
	} else {
		fmt.Printf("You have %d monitors\n", i)
	}
	monitorInfo()

}

func monitorInfo() {
	for _, mon := range monitors {
		fmt.Printf("monitor name: %s\n", mon.GetName())
		i, t := mon.GetPos()
		fmt.Printf("position X: %d  Y: %d\n", i, t)
	}

}

func glInit() {
	if err = glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	checkMon()
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)

	win, err = glfw.CreateWindow(800, 600, "Cube", nil, nil)
	if err != nil {
		panic(err)
	}

	win.MakeContextCurrent()

	if err := gl.Init(); err != nil {
		panic(err)
	}

	gl.ClearColor(0.1, 0.5, 0.9, 0.0)
	qml.Func1 = func() int {
		if !win.ShouldClose() {
			gl.Clear(gl.COLOR_BUFFER_BIT)
			drawSlide()
			win.SwapBuffers()
			glfw.PollEvents()
			return 0
		} else {
			win.Hide()

			return 1
		}
	}

}

func setSignals() {
	textEdit.ObjectByName("textEdit1").On("focusChanged", func(focus bool) {
		var (
			str string
			cel cell
		)

		if !focus {
			str = textEdit.ObjectByName("textEdit1").String("text")
			cel = slides[textEdit.Int("cell")]
			cel.qmlcell.ObjectByName("cellText").Set("text", str)
		}
	})

}

func (cl *cell) setSignal() {
	cl.qmlcell.ObjectByName("cellMouse").On("doubleClicked", func() {
		cellText := cl.qmlcell.ObjectByName("cellText")
		textEdit.Set("cell", cl.index)
		textEdit.Set("x", cellText.Int("x")+4)
		textEdit.Set("y", cellText.Int("y")+4)
		textEdit.Set("width", cellText.Int("width"))
		textEdit.Set("height", cellText.Int("height"))
		textEdit.Set("opacity", 100)
		textEdit.Set("visible", true)
		textEdit.ObjectByName("textEdit1").Set("focus", true)
		textEdit.Set("enabled", true)
	})

}

func (sl *slide) addCell( /*cl *cell*/ ) {
	var cl cell

	cl.qmlcell = cellQml.Create(nil)
	cl.qmlcell.Set("objectName", fmt.Sprintf("cellRect%d", cl.index))
	cl.qmlcell.Set("parent", window.ObjectByName("data1"))

	cl.index = len(*sl)

	cl.text = "testing 1... 2... 3..."
	cl.qmlcell.ObjectByName("cellText").Set("text", cl.text)
	*sl = append(*sl, cl)

	cl.setSignal()

}

func (cl cell) String() string {
	return fmt.Sprintf("Index: %d \nText:  %s\n", cl.index, cl.text)
}