package ui

import (
	"errors"

	"gioui.org/layout"
	"gioui.org/widget"
	"gioui.org/widget/material"

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

// hotkeyDialog edits the hotkey string of a single entry. It's a thin
// wrapper around an Editor: validation runs synchronously on submit and
// the caller is told the *parsed* value (still in canonical string
// form, "" for clear).
type hotkeyDialog struct {
	target *entry

	ed       widget.Editor
	clearBt  widget.Clickable
	okBt     widget.Clickable
	cancelBt widget.Clickable

	errorMsg string
}

func newHotkeyDialog(target *entry) *hotkeyDialog {
	d := &hotkeyDialog{target: target}
	d.ed.SingleLine = true
	d.ed.SetText(target.Hotkey)
	return d
}

// hotkeyResult tells the caller what to do. cleared=true means remove
// any existing hotkey. value is the canonical string ("Ctrl+Alt+G") if
// set is true.
type hotkeyResult struct {
	cancel  bool
	cleared bool
	value   string
}

func (d *hotkeyDialog) Layout(
	gtx layout.Context, th *material.Theme,
	onDone func(hotkeyResult),
) layout.Dimensions {
	if d.cancelBt.Clicked(gtx) {
		onDone(hotkeyResult{cancel: true})
		return layout.Dimensions{Size: gtx.Constraints.Max}
	}
	if d.clearBt.Clicked(gtx) {
		onDone(hotkeyResult{cleared: true})
		return layout.Dimensions{Size: gtx.Constraints.Max}
	}
	if d.okBt.Clicked(gtx) {
		txt := d.ed.Text()
		h, err := hotkey.Parse(txt)
		switch {
		case errors.Is(err, hotkey.ErrEmpty):
			onDone(hotkeyResult{cleared: true})
			return layout.Dimensions{Size: gtx.Constraints.Max}
		case err != nil:
			d.errorMsg = err.Error()
		default:
			onDone(hotkeyResult{value: hotkey.Format(h)})
			return layout.Dimensions{Size: gtx.Constraints.Max}
		}
	}

	body := func(gtx layout.Context) layout.Dimensions {
		return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
			layout.Rigid(material.Body2(th, i18n.T("hotkey_intro")).Layout),
			layout.Rigid(layout.Spacer{Height: 8}.Layout),
			layout.Rigid(labeledEditor(th, i18n.T("label_hotkey"), &d.ed, "Ctrl+Alt+G")),
			layout.Rigid(errorLabel(th, d.errorMsg)),
			layout.Rigid(layout.Spacer{Height: 8}.Layout),
			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
				return material.Button(th, &d.clearBt, i18n.T("btn_clear_hotkey")).Layout(gtx)
			}),
		)
	}
	return modalCard(gtx, th, i18n.T("dialog_hotkey_title"),
		i18n.T("btn_ok"), i18n.T("btn_cancel"),
		&d.okBt, &d.cancelBt, body)
}