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package com.WazaBe.HoloEverywhere.preference;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Build.VERSION;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.widget.TextView;

import com.WazaBe.HoloEverywhere.R;

public abstract class TwoStatePreference extends Preference {

	static class SavedState extends BaseSavedState {
		public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
			@Override
			public SavedState createFromParcel(Parcel in) {
				return new SavedState(in);
			}

			@Override
			public SavedState[] newArray(int size) {
				return new SavedState[size];
			}
		};

		boolean checked;

		public SavedState(Parcel source) {
			super(source);
			checked = source.readInt() == 1;
		}

		public SavedState(Parcelable superState) {
			super(superState);
		}

		@Override
		public void writeToParcel(Parcel dest, int flags) {
			super.writeToParcel(dest, flags);
			dest.writeInt(checked ? 1 : 0);
		}
	}

	boolean mChecked;
	private boolean mDisableDependentsState;
	private boolean mSendClickAccessibilityEvent;
	private CharSequence mSummaryOff, mSummaryOn;

	public TwoStatePreference(Context context) {
		this(context, null);
	}

	public TwoStatePreference(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public TwoStatePreference(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}

	public boolean getDisableDependentsState() {
		return mDisableDependentsState;
	}

	public CharSequence getSummaryOff() {
		return mSummaryOff;
	}

	public CharSequence getSummaryOn() {
		return mSummaryOn;
	}

	public boolean isChecked() {
		return mChecked;
	}

	@Override
	protected void onClick() {
		super.onClick();
		boolean newValue = !isChecked();
		mSendClickAccessibilityEvent = true;
		if (!callChangeListener(newValue)) {
			return;
		}
		setChecked(newValue);
	}

	@Override
	protected Object onGetDefaultValue(TypedArray a, int index) {
		return a.getBoolean(index, false);
	}

	@Override
	protected void onRestoreInstanceState(Parcelable state) {
		if (state == null || !state.getClass().equals(SavedState.class)) {
			super.onRestoreInstanceState(state);
			return;
		}
		SavedState myState = (SavedState) state;
		super.onRestoreInstanceState(myState.getSuperState());
		setChecked(myState.checked);
	}

	@Override
	protected Parcelable onSaveInstanceState() {
		final Parcelable superState = super.onSaveInstanceState();
		if (isPersistent()) {
			return superState;
		}

		final SavedState myState = new SavedState(superState);
		myState.checked = isChecked();
		return myState;
	}

	@Override
	protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
		setChecked(restoreValue ? getPersistedBoolean(mChecked)
				: (Boolean) defaultValue);
	}

	@SuppressLint("NewApi")
	void sendAccessibilityEvent(View view) {
		try {
			AccessibilityManager accessibilityManager = (AccessibilityManager) getContext()
					.getSystemService(Context.ACCESSIBILITY_SERVICE);
			if (mSendClickAccessibilityEvent
					&& accessibilityManager.isEnabled()) {
				AccessibilityEvent event = AccessibilityEvent.obtain();
				event.setEventType(AccessibilityEvent.TYPE_VIEW_CLICKED);
				if (VERSION.SDK_INT >= 14) {
					view.onInitializeAccessibilityEvent(event);
				}
				view.dispatchPopulateAccessibilityEvent(event);
				accessibilityManager.sendAccessibilityEvent(event);
			}
		} catch (Exception e) {
		}
		mSendClickAccessibilityEvent = false;
	}

	public void setChecked(boolean checked) {
		if (mChecked != checked) {
			mChecked = checked;
			persistBoolean(checked);
			notifyDependencyChange(shouldDisableDependents());
			notifyChanged();
		}
	}

	public void setDisableDependentsState(boolean disableDependentsState) {
		mDisableDependentsState = disableDependentsState;
	}

	public void setSummaryOff(CharSequence summary) {
		mSummaryOff = summary;
		if (!isChecked()) {
			notifyChanged();
		}
	}

	public void setSummaryOff(int summaryResId) {
		setSummaryOff(getContext().getString(summaryResId));
	}

	public void setSummaryOn(CharSequence summary) {
		mSummaryOn = summary;
		if (isChecked()) {
			notifyChanged();
		}
	}

	public void setSummaryOn(int summaryResId) {
		setSummaryOn(getContext().getString(summaryResId));
	}

	@Override
	public boolean shouldDisableDependents() {
		return mDisableDependentsState ? mChecked : !mChecked
				|| super.shouldDisableDependents();
	}

	void syncSummaryView(View view) {
		TextView summaryView = (TextView) view.findViewById(R.id.summary);
		if (summaryView != null) {
			boolean useDefaultSummary = true;
			if (mChecked && mSummaryOn != null) {
				summaryView.setText(mSummaryOn);
				useDefaultSummary = false;
			} else if (!mChecked && mSummaryOff != null) {
				summaryView.setText(mSummaryOff);
				useDefaultSummary = false;
			}
			if (useDefaultSummary) {
				final CharSequence summary = getSummary();
				if (summary != null) {
					summaryView.setText(summary);
					useDefaultSummary = false;
				}
			}
			int newVisibility = useDefaultSummary ? View.GONE : View.VISIBLE;
			if (newVisibility != summaryView.getVisibility()) {
				summaryView.setVisibility(newVisibility);
			}
		}
	}
}