/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.documentsui;

import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.app.Fragment;
import android.content.pm.ResolveInfo;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.SparseArray;

import com.android.documentsui.model.DocumentInfo;
import com.android.documentsui.model.DocumentStack;
import com.android.documentsui.model.DurableUtils;
import com.android.documentsui.model.RootInfo;
import com.google.common.collect.Maps;

abstract class BaseActivity extends Activity {
    /** Intent action name to open copy destination. */
    public static String ACTION_OPEN_COPY_DESTINATION_STRING =
        "com.android.documentsui.OPEN_COPY_DESTINATION";

    /**
     * Extra boolean flag for ACTION_OPEN_COPY_DESTINATION_STRING, which
     * specifies if the destination directory needs to create new directory or not.
     */
    public static String EXTRA_DIRECTORY_COPY = "com.android.documentsui.DIRECTORY_COPY";

    public abstract State getDisplayState();
    public abstract RootInfo getCurrentRoot();
    public abstract void onStateChanged();
    public abstract void setRootsDrawerOpen(boolean open);
    public abstract void onDocumentPicked(DocumentInfo doc);
    public abstract void onDocumentsPicked(List<DocumentInfo> docs);
    public abstract DocumentInfo getCurrentDirectory();
    public abstract void setPending(boolean pending);
    public abstract void onStackPicked(DocumentStack stack);
    public abstract void onPickRequested(DocumentInfo pickTarget);
    public abstract void onAppPicked(ResolveInfo info);
    public abstract void onRootPicked(RootInfo root, boolean closeDrawer);
    public abstract void onSaveRequested(DocumentInfo replaceTarget);
    public abstract void onSaveRequested(String mimeType, String displayName);

    public static BaseActivity get(Fragment fragment) {
        return (BaseActivity) fragment.getActivity();
    }

    public static class State implements android.os.Parcelable {
        public int action;
        public String[] acceptMimes;

        /** Explicit user choice */
        public int userMode = MODE_UNKNOWN;
        /** Derived after loader */
        public int derivedMode = MODE_LIST;

        /** Explicit user choice */
        public int userSortOrder = SORT_ORDER_UNKNOWN;
        /** Derived after loader */
        public int derivedSortOrder = SORT_ORDER_DISPLAY_NAME;

        public boolean allowMultiple = false;
        public boolean showSize = false;
        public boolean localOnly = false;
        public boolean forceAdvanced = false;
        public boolean showAdvanced = false;
        public boolean stackTouched = false;
        public boolean restored = false;
        public boolean directoryCopy = false;

        /** Current user navigation stack; empty implies recents. */
        public DocumentStack stack = new DocumentStack();
        /** Currently active search, overriding any stack. */
        public String currentSearch;

        /** Instance state for every shown directory */
        public HashMap<String, SparseArray<Parcelable>> dirState = Maps.newHashMap();

        public static final int ACTION_OPEN = 1;
        public static final int ACTION_CREATE = 2;
        public static final int ACTION_GET_CONTENT = 3;
        public static final int ACTION_OPEN_TREE = 4;
        public static final int ACTION_MANAGE = 5;
        public static final int ACTION_BROWSE = 6;
        public static final int ACTION_BROWSE_ALL = 7;
        public static final int ACTION_OPEN_COPY_DESTINATION = 8;

        public static final int MODE_UNKNOWN = 0;
        public static final int MODE_LIST = 1;
        public static final int MODE_GRID = 2;

        public static final int SORT_ORDER_UNKNOWN = 0;
        public static final int SORT_ORDER_DISPLAY_NAME = 1;
        public static final int SORT_ORDER_LAST_MODIFIED = 2;
        public static final int SORT_ORDER_SIZE = 3;

        @Override
        public int describeContents() {
            return 0;
        }

        @Override
        public void writeToParcel(Parcel out, int flags) {
            out.writeInt(action);
            out.writeInt(userMode);
            out.writeStringArray(acceptMimes);
            out.writeInt(userSortOrder);
            out.writeInt(allowMultiple ? 1 : 0);
            out.writeInt(showSize ? 1 : 0);
            out.writeInt(localOnly ? 1 : 0);
            out.writeInt(forceAdvanced ? 1 : 0);
            out.writeInt(showAdvanced ? 1 : 0);
            out.writeInt(stackTouched ? 1 : 0);
            out.writeInt(restored ? 1 : 0);
            DurableUtils.writeToParcel(out, stack);
            out.writeString(currentSearch);
            out.writeMap(dirState);
        }

        public static final Creator<State> CREATOR = new Creator<State>() {
            @Override
            public State createFromParcel(Parcel in) {
                final State state = new State();
                state.action = in.readInt();
                state.userMode = in.readInt();
                state.acceptMimes = in.readStringArray();
                state.userSortOrder = in.readInt();
                state.allowMultiple = in.readInt() != 0;
                state.showSize = in.readInt() != 0;
                state.localOnly = in.readInt() != 0;
                state.forceAdvanced = in.readInt() != 0;
                state.showAdvanced = in.readInt() != 0;
                state.stackTouched = in.readInt() != 0;
                state.restored = in.readInt() != 0;
                DurableUtils.readFromParcel(in, state.stack);
                state.currentSearch = in.readString();
                in.readMap(state.dirState, null);
                return state;
            }

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