package com.xtremelabs.robolectric.shadows;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.HashMap;

import android.text.SpannableString;

import com.xtremelabs.robolectric.internal.Implementation;
import com.xtremelabs.robolectric.internal.Implements;

@Implements(SpannableString.class)
public class ShadowSpannableString {

    private CharSequence text = "";
    private HashMap<Object, SpanHolder> spans = new HashMap<Object, SpanHolder>();

    public void __constructor__(CharSequence source) {
        text = source;
    }

    @Implementation
    public String toString() {
        return text.toString();
    }

    @Implementation
    public void setSpan(Object what, int start, int end, int flags) {
        spans.put(what, new SpanHolder(start, end, flags) );
    }

    @Implementation
    public void removeSpan(Object what) {
        spans.remove(what);
    }

    @Implementation
    public <T> T[] getSpans(int queryStart, int queryEnd, Class<T> kind) {
        ArrayList<T> retVal = new ArrayList<T>();

        for (Object s : spans.keySet()) {
            if (kind.isInstance(s)) {
                SpanHolder h = spans.get(s);
                if ( (h.start <= queryStart && h.end >= queryStart) ||
                        (h.start <= queryEnd   && h.end >= queryEnd)   ||
                        (h.start >= queryStart && h.end <= queryEnd) ) {
                    retVal.add((T) s);
                }
            }
        }
        T[] array = (T[]) Array.newInstance(kind, retVal.size());
        return retVal.toArray(array);
    }

    @Implementation
    public int getSpanStart(Object what) {
        SpanHolder spanHolder = spans.get(what);
        if (spanHolder != null) {
            return spanHolder.start;
        } else {
            return -1;
        }
    }

    @Implementation
    public int getSpanEnd(Object what) {
        SpanHolder spanHolder = spans.get(what);
        if (spanHolder != null) {
            return spanHolder.end;
        } else {
            return -1;
        }
    }

    private class SpanHolder {
        public int start;
        public int end;
        public int flags;

        public SpanHolder(int start, int end, int flags) {
            this.start = start;
            this.end = end;
            this.flags = flags;
        }
    }
}