package org.hedgewars.hedgeroid.util;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.KeyEvent;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

/**
 * A generic text input dialog with configurable text. The Activity must implement the callback
 * interface TextInputDialogListener, which will be called by the dialog if it is submitted or cancelled.
 */
public class TextInputDialog extends DialogFragment {
	private static final String BUNDLE_DIALOG_ID = "dialogId";
	private static final String BUNDLE_TITLE_TEXT = "title";
	private static final String BUNDLE_MESSAGE_TEXT = "message";
	private static final String BUNDLE_HINT_TEXT = "hint";
	
	private int dialogId, titleText, messageText, hintText;
	private TextInputDialogListener listener;
	
	public interface TextInputDialogListener {
		void onTextInputDialogSubmitted(int dialogId, String text);
		void onTextInputDialogCancelled(int dialogId);
	}
	
	/**
	 * The dialogId is only used for passing back to the callback on the activity, the
	 * other parameters are text resource IDs. Pass 0 for any of them to not use this
	 * text.
	 */
	public TextInputDialog(int dialogId, int titleText, int messageText, int hintText) {
		this.dialogId = dialogId;
		this.titleText = titleText;
		this.messageText = messageText;
		this.hintText = hintText;
	}
	
	public TextInputDialog() {
		// Only for reflection-based instantiation by the framework
	}
	
	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);
		try {
			listener = (TextInputDialogListener) activity;
		} catch(ClassCastException e) {
			throw new ClassCastException("Activity " + activity + " must implement TextInputDialogListener to use TextInputDialog.");
		}
	}
	
	@Override
	public void onDetach() {
		super.onDetach();
		listener = null;
	}
	
	@Override
	public Dialog onCreateDialog(Bundle savedInstanceState) {
		if(savedInstanceState != null) {
			dialogId = savedInstanceState.getInt(BUNDLE_DIALOG_ID, dialogId);
			titleText = savedInstanceState.getInt(BUNDLE_TITLE_TEXT, titleText);
			messageText = savedInstanceState.getInt(BUNDLE_MESSAGE_TEXT, messageText);
			hintText = savedInstanceState.getInt(BUNDLE_HINT_TEXT, hintText);
		}
		
		final EditText editText = new EditText(getActivity());
		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
		
		if(titleText != 0) {
			builder.setTitle(titleText);
		}
		if(messageText != 0) {
			builder.setTitle(messageText);
		}
		if(hintText != 0) {
			editText.setHint(hintText);
		}
		
		editText.setId(android.R.id.text1);
		editText.setImeOptions(EditorInfo.IME_ACTION_DONE);
		editText.setSingleLine();

		builder.setView(editText);
		builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				dialog.cancel();
			}
		});
		
		editText.setOnEditorActionListener(new OnEditorActionListener() {
			public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
				listener.onTextInputDialogSubmitted(dialogId, v.getText().toString());
				return true;
			}
		});
		
		builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				listener.onTextInputDialogSubmitted(dialogId, editText.getText().toString());
			}
		});

		return builder.create();
	}
	
	@Override
	public void onSaveInstanceState(Bundle icicle) {
		super.onSaveInstanceState(icicle);
		icicle.putInt(BUNDLE_DIALOG_ID, dialogId);
		icicle.putInt(BUNDLE_TITLE_TEXT, titleText);
		icicle.putInt(BUNDLE_MESSAGE_TEXT, messageText);
		icicle.putInt(BUNDLE_HINT_TEXT, hintText);
	}
	
	@Override
	public void onCancel(DialogInterface dialog) {
		super.onCancel(dialog);
		listener.onTextInputDialogCancelled(dialogId);
	}
}