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

package preferences

/*
#include <stdlib.h>
#include "native.h"
*/
import "C"

import (
	"errors"
	"path/filepath"
	"unsafe"

	"git.stormux.org/storm/cthulhu/internal/braille"
)

func setBrailleChoice(brief, verbose string, value int) {
	setCheck(brief, value == 0)
	setCheck(verbose, value != 0)
}

func setBrailleIndicator(prefix string, value int) {
	suffix := map[int]string{0: "NoneButton", 0x40: "7Button", 0x80: "8Button", 0xc0: "BothButton"}[value]
	setCheck(prefix+suffix, true)
}

func getBrailleIndicator(prefix string) int {
	for _, option := range []struct {
		suffix string
		dots   int
	}{
		{"7Button", 0x40}, {"8Button", 0x80}, {"BothButton", 0xc0},
	} {
		if getCheck(prefix + option.suffix) {
			return option.dots
		}
	}
	return 0
}

func (session *uiSession) set_braille_values(values Values) {
	setCheck("enableBrailleCheckButton", values.EnableBraille)
	setCheck("contractedBrailleCheckButton", values.EnableContractedBraille)
	setCheck("abbrevRolenames", values.Braille.AbbreviateRoles)
	setCheck("disableBrailleEOLCheckButton", values.Braille.DisableEOL)
	setCheck("enableBrailleWordWrapCheckButton", values.Braille.WordWrap)
	setCheck("enableFlashMessagesCheckButton", values.Braille.FlashMessages)
	setCheck("flashIsPersistentCheckButton", values.Braille.FlashPersistent)
	setCheck("flashIsDetailedCheckButton", values.Braille.FlashDetailed)
	setSpin("brailleFlashTimeSpinButton", float64(values.Braille.FlashTime)/1000)
	setBrailleChoice("brailleBriefButton", "brailleVerboseButton", values.Braille.Verbosity)
	setBrailleIndicator("brailleSelection", values.Braille.SelectionIndicator)
	setBrailleIndicator("brailleLink", values.Braille.LinkIndicator)
	session.contractionTables = braille.AvailableTables()
	comboID := C.CString("contractionTableCombo")
	C.prefs_combo_clear(comboID)
	defaultLabel := C.CString("Automatic for current language")
	C.prefs_combo_append(comboID, defaultLabel)
	C.free(unsafe.Pointer(defaultLabel))
	selected := 0
	for index, table := range session.contractionTables {
		label := C.CString(table.Label)
		C.prefs_combo_append(comboID, label)
		C.free(unsafe.Pointer(label))
		if table.File == values.BrailleContractionTable || filepath.Base(table.File) == values.BrailleContractionTable {
			selected = index + 1
		}
	}
	if values.BrailleContractionTable != "" && selected == 0 {
		// Keep a saved table available even after a locale change or package update.
		session.contractionTables = append(session.contractionTables, braille.TableOption{
			Label: "Saved: " + filepath.Base(values.BrailleContractionTable),
			File:  values.BrailleContractionTable,
		})
		label := C.CString(session.contractionTables[len(session.contractionTables)-1].Label)
		C.prefs_combo_append(comboID, label)
		C.free(unsafe.Pointer(label))
		selected = len(session.contractionTables)
	}
	C.prefs_combo_set(comboID, C.int(selected))
	C.free(unsafe.Pointer(comboID))
}

func (session *uiSession) get_braille_values(values *Values) error {
	values.EnableBraille = getCheck("enableBrailleCheckButton")
	values.EnableContractedBraille = getCheck("contractedBrailleCheckButton")
	values.Braille.AbbreviateRoles = getCheck("abbrevRolenames")
	values.Braille.DisableEOL = getCheck("disableBrailleEOLCheckButton")
	values.Braille.WordWrap = getCheck("enableBrailleWordWrapCheckButton")
	values.Braille.FlashMessages = getCheck("enableFlashMessagesCheckButton")
	values.Braille.FlashPersistent = getCheck("flashIsPersistentCheckButton")
	values.Braille.FlashDetailed = getCheck("flashIsDetailedCheckButton")
	values.Braille.FlashTime = int(getSpin("brailleFlashTimeSpinButton") * 1000)
	if getCheck("brailleVerboseButton") {
		values.Braille.Verbosity = 1
	}
	values.Braille.SelectionIndicator = getBrailleIndicator("brailleSelection")
	values.Braille.LinkIndicator = getBrailleIndicator("brailleLink")
	selectedTable := getCombo("contractionTableCombo")
	if selectedTable < 0 || selectedTable > len(session.contractionTables) {
		return errors.New("Choose a contraction table.")
	}
	if selectedTable > 0 {
		values.BrailleContractionTable = session.contractionTables[selectedTable-1].File
	}
	return nil
}