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

package presentation

import (
	"fmt"
	"strings"

	"git.stormux.org/storm/cthulhu/internal/atspi"
	"git.stormux.org/storm/cthulhu/internal/config"
)

func reading_options(options Options) config.ReadingSettings {
	if options.Reading != nil {
		return *options.Reading
	}
	return config.DefaultSettings().Reading
}
func join_speech_parts(parts []string, options Options) string {
	if !reading_options(options).EnablePauseBreaks {
		return strings.Join(parts, " ")
	}
	return strings.Join(parts, ", ")
}
func displayed_focus_text(snapshot atspi.Snapshot) string {
	var parts []string
	for _, text := range []string{snapshot.Name, snapshot.Text, controlValue(snapshot)} {
		if text != "" && !contains(parts, text) {
			parts = append(parts, text)
		}
	}
	return strings.Join(parts, " ")
}
func control_tutorial(snapshot atspi.Snapshot) string {
	switch snapshot.Role {
	case "push button", "button":
		return "Press Space to activate."
	case "check box", "toggle button":
		return "Press Space to toggle."
	case "radio button":
		return "Use arrow keys to select an option."
	case "combo box":
		return "Press Alt+Down to open the list."
	case "slider", "spin button":
		return "Use arrow keys to change the value."
	case "entry", "text":
		if snapshot.Editable && !snapshot.ReadOnly {
			return "Type to enter text."
		}
	case "list", "list box", "tree", "tree table":
		return "Use arrow keys to move between items."
	}
	return ""
}

func FullRowEnabled(snapshot atspi.Snapshot, options Options) bool {
	reading := reading_options(options)
	if snapshot.Spreadsheet {
		return reading.ReadFullRowInSpreadSheet
	}
	if snapshot.GUITable {
		return options.ReadFullRowInGUITable
	}
	return reading.ReadFullRowInDocumentTable
}

// ContextType matches Python's separate container and landmark preferences.
func ContextType(snapshot atspi.Snapshot) string {
	switch snapshot.Role {
	case "block quote", "blockquote":
		return "blockquote"
	case "list", "list box":
		return "list"
	case "table", "tree table":
		if !snapshot.LayoutTable {
			return "table"
		}
	case "panel", "grouping":
		return "panel"
	case "landmark":
		return "landmark"
	case "form":
		if snapshot.Name == "" {
			return "form"
		}
		return "landmark"
	}
	for _, role := range strings.Fields(snapshot.XMLRoles) {
		switch role {
		case "banner", "complementary", "contentinfo", "main", "navigation", "search", "region":
			return "landmark"
		case "form":
			if snapshot.Name != "" {
				return "landmark"
			}
			return "form"
		}
	}
	if strings.EqualFold(snapshot.HTMLTag, "blockquote") {
		return "blockquote"
	}
	return ""
}

func ContextEnabled(kind string, reading config.ReadingSettings) bool {
	if reading.OnlySpeakDisplayedText {
		return false
	}
	switch kind {
	case "blockquote":
		return reading.SpeakContextBlockquote
	case "list":
		return reading.SpeakContextList
	case "table":
		return reading.SpeakContextTable
	case "panel":
		return reading.SpeakContextPanel
	case "landmark":
		return reading.SpeakContextLandmark
	case "form":
		return reading.SpeakContextNonLandmarkForm
	}
	return false
}

// Say All has its own context choices, independent of navigation speech.
func SayAllContextEnabled(kind string, reading config.ReadingSettings) bool {
	if reading.OnlySpeakDisplayedText {
		return false
	}
	switch kind {
	case "blockquote":
		return reading.SayAllContextBlockquote
	case "list":
		return reading.SayAllContextList
	case "table":
		return reading.SayAllContextTable
	case "panel":
		return reading.SayAllContextPanel
	case "landmark":
		return reading.SayAllContextLandmark
	case "form":
		return reading.SayAllContextNonLandmarkForm
	}
	return false
}

func ContextLabel(snapshot atspi.Snapshot) string {
	role := ContextType(snapshot)
	if role == "blockquote" {
		role = "block quote"
	}
	if role == "landmark" && snapshot.XMLRoles != "" {
		role = strings.Fields(snapshot.XMLRoles)[0] + " landmark"
	}
	if snapshot.Name != "" {
		return snapshot.Name + " " + role
	}
	return role
}

func itemCountText(count int) string {
	if count == 1 {
		return "1 item"
	}
	return fmt.Sprintf("%d items", count)
}

// TableHeaderText preserves the provider's header label and adds the role
// wording used by verbose speech. Brief speech keeps the label alone.
func TableHeaderText(label, role string, verbosity int) string {
	if label == "" || verbosity == 0 {
		return label
	}
	return label + " " + role
}

// ContextCountLabel adds provider-backed list size to a new context entry.
// The ordinary context label remains stable for exits and brief speech.
func ContextCountLabel(snapshot atspi.Snapshot, verbosity int) string {
	if verbosity != 0 && snapshot.ChildCountKnown && snapshot.ChildCount > 0 &&
		(snapshot.Role == "list" || snapshot.Role == "list box") {
		if snapshot.Name != "" {
			return snapshot.Name + ", " + itemCountText(snapshot.ChildCount)
		}
		return itemCountText(snapshot.ChildCount)
	}
	return ContextLabel(snapshot)
}