/*************************************************************************/
/*  GodotTextInputWrapper.java                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/*************************************************************************/

package org.godotengine.godot.input;

import org.godotengine.godot.*;

import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

public class GodotTextInputWrapper implements TextWatcher, OnEditorActionListener {
	// ===========================================================
	// Constants
	// ===========================================================
	private static final String TAG = GodotTextInputWrapper.class.getSimpleName();

	// ===========================================================
	// Fields
	// ===========================================================
	private final GodotView mView;
	private final GodotEditText mEdit;
	private String mOriginText;
	private boolean mHasSelection;

	// ===========================================================
	// Constructors
	// ===========================================================

	public GodotTextInputWrapper(final GodotView view, final GodotEditText edit) {
		this.mView = view;
		this.mEdit = edit;
	}

	// ===========================================================
	// Getter & Setter
	// ===========================================================

	private boolean isFullScreenEdit() {
		final TextView textField = this.mEdit;
		final InputMethodManager imm = (InputMethodManager)textField.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
		return imm.isFullscreenMode();
	}

	public void setOriginText(final String originText) {
		this.mOriginText = originText;
	}

	public void setSelection(boolean selection) {
		mHasSelection = selection;
	}

	// ===========================================================
	// Methods for/from SuperClass/Interfaces
	// ===========================================================

	@Override
	public void afterTextChanged(final Editable s) {
	}

	@Override
	public void beforeTextChanged(final CharSequence pCharSequence, final int start, final int count, final int after) {
		//Log.d(TAG, "beforeTextChanged(" + pCharSequence + ")start: " + start + ",count: " + count + ",after: " + after);

		mView.queueEvent(new Runnable() {
			@Override
			public void run() {
				for (int i = 0; i < count; ++i) {
					GodotLib.key(KeyEvent.KEYCODE_DEL, 0, true);
					GodotLib.key(KeyEvent.KEYCODE_DEL, 0, false);

					if (mHasSelection) {
						mHasSelection = false;
						break;
					}
				}
			}
		});
	}

	@Override
	public void onTextChanged(final CharSequence pCharSequence, final int start, final int before, final int count) {
		//Log.d(TAG, "onTextChanged(" + pCharSequence + ")start: " + start + ",count: " + count + ",before: " + before);

		final int[] newChars = new int[count];
		for (int i = start; i < start + count; ++i) {
			newChars[i - start] = pCharSequence.charAt(i);
		}
		mView.queueEvent(new Runnable() {
			@Override
			public void run() {
				for (int i = 0; i < count; ++i) {
					int key = newChars[i];
					if ((key == '\n') && !mEdit.isMultiline()) {
						// Return keys are handled through action events
						continue;
					}
					GodotLib.key(0, key, true);
					GodotLib.key(0, key, false);
				}
			}
		});
	}

	@Override
	public boolean onEditorAction(final TextView pTextView, final int pActionID, final KeyEvent pKeyEvent) {
		if (this.mEdit == pTextView && this.isFullScreenEdit()) {
			final String characters = pKeyEvent.getCharacters();

			mView.queueEvent(new Runnable() {
				@Override
				public void run() {
					for (int i = 0; i < characters.length(); i++) {
						final int ch = characters.codePointAt(i);
						GodotLib.key(0, ch, true);
						GodotLib.key(0, ch, false);
					}
				}
			});
		}

		if (pActionID == EditorInfo.IME_ACTION_DONE) {
			// Enter key has been pressed
			GodotLib.key(KeyEvent.KEYCODE_ENTER, 0, true);
			GodotLib.key(KeyEvent.KEYCODE_ENTER, 0, false);

			this.mView.requestFocus();
			return true;
		}
		return false;
	}

	// ===========================================================
	// Methods
	// ===========================================================

	// ===========================================================
	// Inner and Anonymous Classes
	// ===========================================================
}
