package ui

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

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

// passwordDialog asks the user for the password to decrypt an existing
// config. The dialog is shown at startup when the config file is found
// to be encrypted; on submit it calls onDone with the entered passphrase.
// Cancel returns an empty passphrase and signals abort.
type passwordDialog struct {
	prompt   string // optional explanatory line above the field
	errorMsg string

	pwEd      widget.Editor
	okBtn     widget.Clickable
	cancelBtn widget.Clickable
}

func newPasswordDialog(prompt string) *passwordDialog {
	d := &passwordDialog{prompt: prompt}
	d.pwEd.SingleLine = true
	d.pwEd.Mask = '*'
	return d
}

// SetError lets the caller surface a "wrong password" message after a
// failed Load attempt, so the same dialog can be reused for a retry loop.
func (d *passwordDialog) SetError(msg string) { d.errorMsg = msg }

// Layout takes onDone(password, ok). ok=true on submit; ok=false on cancel.
// On ok the password slice is freshly allocated (the editor's underlying
// buffer is not retained).
func (d *passwordDialog) Layout(
	gtx layout.Context, th *material.Theme,
	onDone func(password []byte, ok bool),
) layout.Dimensions {
	if d.okBtn.Clicked(gtx) {
		pw := []byte(d.pwEd.Text())
		onDone(pw, true)
		return layout.Dimensions{Size: gtx.Constraints.Max}
	}
	if d.cancelBtn.Clicked(gtx) {
		onDone(nil, false)
		return layout.Dimensions{Size: gtx.Constraints.Max}
	}

	body := func(gtx layout.Context) layout.Dimensions {
		children := []layout.FlexChild{}
		if d.prompt != "" {
			children = append(children,
				layout.Rigid(material.Body2(th, d.prompt).Layout),
				layout.Rigid(layout.Spacer{Height: 8}.Layout),
			)
		}
		children = append(children,
			layout.Rigid(labeledEditor(th, i18n.T("label_password"), &d.pwEd, "")),
			layout.Rigid(errorLabel(th, d.errorMsg)),
		)
		return layout.Flex{Axis: layout.Vertical}.Layout(gtx, children...)
	}
	return modalCard(gtx, th, i18n.T("dialog_password_title"),
		i18n.T("btn_ok"), i18n.T("btn_cancel"),
		&d.okBtn, &d.cancelBtn, body)
}