package main

import (
	"log"
	"os"

	"gioui.org/app"
	"gioui.org/op"
	"gioui.org/text"
	"gioui.org/unit"

	"pad/internal/ui"
)

func main() {
	go func() {
		w := new(app.Window)
		w.Option(app.Title("Pad"))
		w.Option(app.Size(unit.Dp(390), unit.Dp(844)))
		if err := run(w); err != nil {
			log.Fatal(err)
		}
		os.Exit(0)
	}()
	app.Main()
}

func run(w *app.Window) error {
	var ops op.Ops

	shaper := text.NewShaper()
	renderer := ui.New(ui.Theme{FontSize: 14}, shaper)

	// Channel for window configuration events (resize, orientation)
	configChan := make(chan ui.ConfigEvent)

	// Initial screen size
	screenWidth := unit.Dp(390)
	screenHeight := unit.Dp(844)

	// Compute initial elements
	elems := ui.EditorLayout(screenWidth, screenHeight)

	for {
		switch e := w.Event().(type) {
		case app.DestroyEvent:
			return e.Err
		case app.ConfigEvent:
			// Send config event to logic goroutine (here, the main goroutine)
			configChan <- ui.ConfigEvent{
				Width:  unit.Dp(e.Config.Size.X),
				Height: unit.Dp(e.Config.Size.Y),
			}
		case app.FrameEvent:
			// Process any pending config events
			select {
			case cfg := <-configChan:
				// Update screen size and recompute layout
				screenWidth = cfg.Width
				screenHeight = cfg.Height
				elems = ui.EditorLayout(screenWidth, screenHeight)
			default:
				// No config event, use existing elements
			}

			gtx := app.NewContext(&ops, e)
			renderer.Draw(gtx, elems)
			e.Frame(&ops)
		}
	}
}