// Cthulhu screen reader.
// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package app

import (
	"git.stormux.org/storm/cthulhu/internal/atspi"
	"git.stormux.org/storm/cthulhu/internal/presentation"
)

type promptPresentation struct {
	state      *eventLoopState
	event      atspi.Event
	activation bool
	focus      bool
}

func newPromptPresentation(state *eventLoopState, event atspi.Event) promptPresentation {
	control := event.Source.Role == "button" || event.Source.Role == "tree table" || event.Source.Role == "table cell"
	return promptPresentation{
		state:      state,
		event:      event,
		activation: event.Type == atspi.WindowActivatedEvent && control && event.WindowMessage != "",
		focus:      isFocusGainEvent(event) && control && state.pendingPromptWindow.Valid() && event.Window == state.pendingPromptWindow,
	}
}

func (prompt promptPresentation) focusSpeech(spoken, fallback presentation.Speech) (presentation.Speech, presentation.Speech) {
	if prompt.focus && !prompt.state.pendingPromptTextAnnounced && prompt.event.WindowMessage != "" {
		spoken = spoken.Prepend(prompt.event.WindowMessage, ", ")
		fallback = spoken
	}
	return spoken, fallback
}

func (prompt promptPresentation) appendFocus() bool {
	return prompt.focus && (prompt.state.pendingPromptTextAnnounced || prompt.event.WindowMessage != "")
}

func (prompt promptPresentation) finishFocus() {
	if isFocusGainEvent(prompt.event) && (prompt.event.Source.Role == "button" || prompt.event.Source.Role == "tree table" || prompt.event.Source.Role == "table cell") {
		prompt.state.pendingPromptWindow = atspi.ObjectID{}
		prompt.state.pendingPromptTextAnnounced = false
	}
}

func (prompt promptPresentation) rememberWindow() {
	if (prompt.event.Type == atspi.WindowCreateEvent || prompt.event.Type == atspi.WindowActivatedEvent) &&
		(prompt.event.Source.Role == "alert" || prompt.event.Source.Role == "frame" || prompt.activation) &&
		prompt.event.Window.Valid() {
		prompt.state.pendingPromptWindow = prompt.event.Window
		prompt.state.pendingPromptTextAnnounced = prompt.event.Source.Text != "" || prompt.activation
	}
}