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

package atspi

/*
#include "adapter_native.h"
*/
import "C"

import (
	"strings"
	"time"
	"unsafe"
)

func native_mnemonic(source *C.AtspiAccessible) string {
	action := C.atspi_accessible_get_action_iface(source)
	if action == nil {
		return ""
	}
	defer C.g_object_unref(C.gpointer(action))
	if C.atspi_action_get_n_actions(action, nil) <= 0 {
		return ""
	}
	binding := C.atspi_action_get_key_binding(action, 0, nil)
	defer C.g_free(C.gpointer(binding))
	parts := strings.Split(C.GoString(binding), ";")
	if len(parts) == 0 {
		return ""
	}
	// AT-SPI's first field is the mnemonic. Empty mnemonic fields must not
	// turn an unrelated accelerator into a fabricated mnemonic.
	return sanitizeSnapshotField(parts[0])
}

func native_misspelled(text *C.AtspiText, offset int) bool {
	run := native_text_attribute_run(text, offset)
	return TextAttributesMisspelled(run.Values)
}

func native_text_attribute_run(text *C.AtspiText, offset int) TextAttributeRun {
	if offset < 0 {
		return TextAttributeRun{}
	}
	var start, end C.gint
	attributes := C.atspi_text_get_attribute_run(text, C.gint(offset), 0, &start, &end, nil)
	if attributes == nil {
		return TextAttributeRun{}
	}
	defer C.g_hash_table_unref(attributes)
	run := TextAttributeRun{Start: int(start), End: int(end), Values: make(map[string]string)}
	for _, key := range spokenCharacterAttributeKeys {
		name := C.CString(key)
		value := C.g_hash_table_lookup(attributes, C.gconstpointer(unsafe.Pointer(name)))
		C.free(unsafe.Pointer(name))
		if value != nil {
			run.Values[key] = sanitizeSnapshotField(C.GoString((*C.char)(value)))
		}
	}
	return run
}

// Each provider request can block. Stop after a bounded number of runs and a
// short deadline; the caret run is still available if a provider is slow.
func native_text_attribute_runs(text *C.AtspiText, start, end int, caret TextAttributeRun) []TextAttributeRun {
	if start < 0 || end <= start {
		return nil
	}
	deadline := time.Now().Add(60 * time.Millisecond)
	var runs []TextAttributeRun
	for offset := start; offset < end && len(runs) < 32 && time.Now().Before(deadline); {
		run := caret
		if offset < run.Start || offset >= run.End {
			run = native_text_attribute_run(text, offset)
		}
		if run.End <= offset {
			break
		}
		runs = append(runs, run)
		offset = run.End
	}
	return runs
}

// Queries stay on the GLib owner. This copies only container metadata, bounded
// by depth and time, and never scans children or retains native references.
func native_speech_context(source *C.AtspiAccessible) ([]Snapshot, []Snapshot) {
	result := make([]Snapshot, 0)
	brailleContext := make([]Snapshot, 0)
	speechOpen := true
	current := C.atspi_accessible_get_parent(source, nil)
	deadline := time.Now().Add(100 * time.Millisecond)
	for depth := 0; current != nil && depth < 16 && time.Now().Before(deadline); depth++ {
		roleName := C.atspi_accessible_get_role_name(current, nil)
		role := C.GoString(roleName)
		C.g_free(C.gpointer(roleName))
		if role == "application" || role == "frame" || role == "window" || role == "dialog" {
			speechOpen = false
		}
		id := nativeObjectID(current)
		item := Snapshot{BusName: id.BusName, Path: id.Path, Role: role}
		name := C.atspi_accessible_get_name(current, nil)
		item.Name = sanitizeSnapshotField(C.GoString(name))
		C.g_free(C.gpointer(name))
		if role == "application" {
			brailleContext = append(brailleContext, item)
			break
		}
		if speechOpen {
			switch role {
			case "block quote", "blockquote", "list", "list box", "table", "tree table", "panel", "grouping", "landmark", "form", "section", "document spreadsheet", "link":
				if (role == "list" || role == "list box") && time.Now().Before(deadline) {
					var childError *C.GError
					count := C.atspi_accessible_get_child_count(current, &childError)
					item.ChildCount, item.ChildCountKnown = int(count), childError == nil && count >= 0
					if childError != nil {
						C.g_error_free(childError)
					}
				}
				if role == "section" || role == "form" || role == "landmark" || role == "table" {
					attributes := C.atspi_accessible_get_attributes(current, nil)
					if attributes != nil {
						for _, field := range []struct {
							key    string
							target *string
						}{{"xml-roles", &item.XMLRoles}, {"tag", &item.HTMLTag}} {
							key := C.CString(field.key)
							*field.target = sanitizeSnapshotField(C.GoString((*C.char)(C.g_hash_table_lookup(attributes, C.gconstpointer(unsafe.Pointer(key))))))
							C.free(unsafe.Pointer(key))
						}
						key := C.CString("layout-guess")
						item.LayoutTable = C.GoString((*C.char)(C.g_hash_table_lookup(attributes, C.gconstpointer(unsafe.Pointer(key))))) == "true"
						C.free(unsafe.Pointer(key))
						C.g_hash_table_unref(attributes)
					}
				}
				result = append(result, item)
			}
		}
		brailleContext = append(brailleContext, item)
		parent := C.atspi_accessible_get_parent(current, nil)
		C.g_object_unref(C.gpointer(current))
		current = parent
	}
	if current != nil {
		C.g_object_unref(C.gpointer(current))
	}
	return result, brailleContext
}