package com.github.dkharrat.nexusdialog.controllers;

import android.content.Context;
import android.database.DataSetObserver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.SpinnerAdapter;

/**
 * Decorator Adapter to allow a Spinner to show a 'Nothing Selected...' initially displayed instead
 * of the first choice in the Adapter.
 *
 * Adapted from http://stackoverflow.com/a/12221309/120930
 */
class NothingSelectedSpinnerAdapter implements SpinnerAdapter, ListAdapter {

    protected static final int EXTRA = 1;
    protected SpinnerAdapter adapter;
    protected Context context;
    protected int nothingSelectedLayout;
    protected int nothingSelectedDropdownLayout;
    protected LayoutInflater layoutInflater;

    /**
     * Use this constructor to have NO 'Select One...' item, instead use the standard prompt or nothing at all
     * @param spinnerAdapter wrapped Adapter.
     * @param nothingSelectedLayout layout for nothing selected, perhaps you want text grayed out like a prompt...
     * @param context
     */
    public NothingSelectedSpinnerAdapter(SpinnerAdapter spinnerAdapter,
            int nothingSelectedLayout, Context context) {
        this(spinnerAdapter, nothingSelectedLayout, -1, context);
    }

    /**
     * Use this constructor to Define your 'Select One...' layout as the first row in the returned choices.
     * If you do this, you probably don't want a prompt on your spinner or it'll have two 'Select' rows.
     * @param spinnerAdapter wrapped Adapter. Should probably return false for isEnabled(0)
     * @param nothingSelectedLayout layout for nothing selected, perhaps you want text grayed out like a prompt...
     * @param nothingSelectedDropdownLayout layout for your 'Select an Item...' in the dropdown
     * @param context
     */
    public NothingSelectedSpinnerAdapter(SpinnerAdapter spinnerAdapter,
        int nothingSelectedLayout, int nothingSelectedDropdownLayout, Context context) {
        this.adapter = spinnerAdapter;
        this.context = context;
        this.nothingSelectedLayout = nothingSelectedLayout;
        this.nothingSelectedDropdownLayout = nothingSelectedDropdownLayout;
        layoutInflater = LayoutInflater.from(context);
    }

    @Override
    public final View getView(int position, View convertView, ViewGroup parent) {
        // This provides the View for the Selected Item in the Spinner, not the dropdown (unless dropdownView not set)
        if (position == 0) {
            return getNothingSelectedView(parent);
        }
        return adapter.getView(position - EXTRA, null, parent); // could re-use the convertView if possible
    }

    /**
     * View to show in Spinner with Nothing Selected
     * Override this to do something dynamic... e.g. "37 Options Found"
     * @param parent
     * @return
     */
    protected View getNothingSelectedView(ViewGroup parent) {
        return layoutInflater.inflate(nothingSelectedLayout, parent, false);
    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        // BUG! Vote to fix!! http://code.google.com/p/android/issues/detail?id=17128 - Spinner does not support multiple view types
        if (position == 0) {
            return nothingSelectedDropdownLayout == -1 ? new View(context) : getNothingSelectedDropdownView(parent);
        }

        return adapter.getDropDownView(position - EXTRA, null, parent);  // could re-use the convertView if possible, utilize setTag...
    }

    /**
     * Override this to do something dynamic... e.g. "Pick your Favorite of these 37"
     * @param parent
     * @return
     */
    protected View getNothingSelectedDropdownView(ViewGroup parent) {
        return layoutInflater.inflate(nothingSelectedDropdownLayout, parent, false);
    }

    @Override
    public int getCount() {
        int count = adapter.getCount();
        return count == 0 ? 0 : count + EXTRA;
    }

    @Override
    public Object getItem(int position) {
        return position == 0 ? null : adapter.getItem(position - EXTRA);
    }

    @Override
    public int getItemViewType(int position) {
        // doesn't work!! Vote to Fix! http://code.google.com/p/android/issues/detail?id=17128 - Spinner does not support multiple view types
        // This method determines what is the convertView, this should return 1 for pos 0 or return 0 otherwise.
        return position == 0 ? getViewTypeCount() - EXTRA : adapter.getItemViewType(position - EXTRA);
    }

    @Override
    public int getViewTypeCount() {
        return adapter.getViewTypeCount() + EXTRA;
    }

    @Override
    public long getItemId(int position) {
        return adapter.getItemId(position - EXTRA);
    }

    @Override
    public boolean hasStableIds() {
        return adapter.hasStableIds();
    }

    @Override
    public boolean isEmpty() {
        return adapter.isEmpty();
    }

    @Override
    public void registerDataSetObserver(DataSetObserver observer) {
        adapter.registerDataSetObserver(observer);
    }

    @Override
    public void unregisterDataSetObserver(DataSetObserver observer) {
        adapter.unregisterDataSetObserver(observer);
    }

    @Override
    public boolean areAllItemsEnabled() {
        return false;
    }

    @Override
    public boolean isEnabled(int position) {
        return position == 0 ? false : true; // don't allow the 'nothing selected' item to be picked
    }
}
@@ -4237,356 +4237,16 @@
     
-// doesn't work!! Vote to Fix! http://code.google.com/p/android/issues/detail?id=17128 - Spinner does not support multiple view types%0A        // This method determines what is the convertView, this should return 1 for pos 0 or return 0 otherwise.%0A        return position == 0 ? getViewTypeCount() - EXTRA : adapter.getItemViewType(position - EXTRA)
+return 0
 ;%0A  
@@ -4319,42 +4319,9 @@
 urn 
-adapter.getViewTypeCount() + EXTRA
+1
 ;%0A  
@@ -4387,32 +4387,52 @@
 %7B%0A        return
+ position %3E= EXTRA ?
  adapter.getItem
@@ -4443,32 +4443,51 @@
 osition - EXTRA)
+ : position - EXTRA
 ;%0A    %7D%0A%0A    @Ov

fix crash in drop-down field