package ui

import (
	"image"
	"image/color"

	"gioui.org/app"
	"gioui.org/layout"
	"gioui.org/op/clip"
	"gioui.org/op/paint"
	"gioui.org/unit"
	"gioui.org/widget/material"

	"git.wxccs.org/iceking2nd/winauth-go/internal/global"
	"git.wxccs.org/iceking2nd/winauth-go/internal/i18n"
	"git.wxccs.org/iceking2nd/winauth-go/internal/win32"
)

// copyCodeToClipboard pushes the current OTP onto the system clipboard
// and pops a brief toast confirming the action. Errors are surfaced via
// the same toast so the user actually sees them.
func (st *appState) copyCodeToClipboard(en *entry, w *app.Window) {
	const fn = "internal.ui.appState.copyCodeToClipboard"
	if en == nil || en.Code == "" {
		return
	}
	if err := win32.SetClipboardText(en.Code); err != nil {
		global.Log.WithField("func", fn).WithError(err).Warn("clipboard copy failed")
		st.toast.Show(i18n.T("msg_copy_failed"), w)
		w.Invalidate()
		return
	}
	st.toast.Show(i18n.T("msg_copied"), w)
	w.Invalidate()
}

// drawEmptyPlaceholder paints the centered "no entries yet" hint shown
// when the entries list is empty.
func drawEmptyPlaceholder(gtx layout.Context, th *material.Theme) layout.Dimensions {
	return layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
		lbl := material.Body1(th, i18n.T("msg_empty_list"))
		lbl.Color = color.NRGBA{R: 0x80, G: 0x80, B: 0x80, A: 0xff}
		return layout.UniformInset(unit.Dp(8)).Layout(gtx, lbl.Layout)
	})
}

// drawDivider paints a 1px-tall light-gray line across the available
// horizontal space. Used between entries in the list.
func drawDivider(gtx layout.Context) layout.Dimensions {
	h := gtx.Dp(unit.Dp(1))
	size := image.Pt(gtx.Constraints.Max.X, h)
	defer clip.Rect{Max: size}.Push(gtx.Ops).Pop()
	paint.ColorOp{Color: color.NRGBA{R: 0xe0, G: 0xe0, B: 0xe0, A: 0xff}}.Add(gtx.Ops)
	paint.PaintOp{}.Add(gtx.Ops)
	return layout.Dimensions{Size: size}
}