package editor

import (
	"os"
	"path/filepath"

	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

func New(app *tview.Application) *tview.TextArea {
	view := tview.NewTextArea()
	view.SetBackgroundColor(tcell.ColorDefault)
	view.SetTextStyle(tcell.StyleDefault)
	view.SetBorderPadding(0, 0, 1, 1)
	source := "Having been erased,\nThe document you're seeking\nMust now be retyped."

	home, err := os.UserHomeDir()

	if err != nil {
		panic(err)
	}

	data, err := os.ReadFile(filepath.Join(home, ".dash"))

	if err == nil {
		source = string(data)
	}

	view.SetText(source, true)

	view.SetChangedFunc(func() {
		source = view.GetText()
		markDirty(view, true)
	})

	view.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
		if event.Key() == tcell.KeyCtrlS {
			err := os.WriteFile(filepath.Join(home, ".dash"), []byte(source), 0644)

			if err != nil {
				panic(err)
			}

			markDirty(view, false)
			return nil
		}

		return event
	})

	return view
}

func markDirty(view *tview.TextArea, dirty bool) {
	if dirty {
		view.SetBackgroundColor(tcell.ColorRed)
	} else {
		view.SetBackgroundColor(tcell.ColorDefault)
	}
}