/*

• Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
• 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 net.micode.notes.data;

import android.app.SearchManager; import android.content.ContentProvider; import android.content.ContentUris; import android.content.ContentValues; import android.content.Intent; import android.content.UriMatcher; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.net.Uri; import android.text.TextUtils; import android.util.Log;

import net.micode.notes.R; import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.NotesDatabaseHelper.TABLE;

public class NotesProvider extends ContentProvider { private static final UriMatcher mMatcher;

private NotesDatabaseHelper mHelper;

private static final String TAG = "NotesProvider";

private static final int URI_NOTE            = 1;
private static final int URI_NOTE_ITEM       = 2;
private static final int URI_DATA            = 3;
private static final int URI_DATA_ITEM       = 4;

private static final int URI_SEARCH          = 5;
private static final int URI_SEARCH_SUGGEST  = 6;

static {
    mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
    mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
    mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
    mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
    mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
    mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
    mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
    mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
}

/**
 * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
 * we will trim '\n' and white space in order to show more information.
 */
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
    + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
    + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
    + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
    + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
    + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
    + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;

private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
    + " FROM " + TABLE.NOTE
    + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
    + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
    + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;

@Override
public boolean onCreate() {
    mHelper = NotesDatabaseHelper.getInstance(getContext());
    return true;
}

@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
        String sortOrder) {
    Cursor c = null;
    SQLiteDatabase db = mHelper.getReadableDatabase();
    String id = null;
    switch (mMatcher.match(uri)) {
        case URI_NOTE:
            c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                    sortOrder);
            break;
        case URI_NOTE_ITEM:
            id = uri.getPathSegments().get(1);
            c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
                    + parseSelection(selection), selectionArgs, null, null, sortOrder);
            break;
        case URI_DATA:
            c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
                    sortOrder);
            break;
        case URI_DATA_ITEM:
            id = uri.getPathSegments().get(1);
            c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
                    + parseSelection(selection), selectionArgs, null, null, sortOrder);
            break;
        case URI_SEARCH:
        case URI_SEARCH_SUGGEST:
            if (sortOrder != null || projection != null) {
                throw new IllegalArgumentException(
                        "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
            }

            String searchString = null;
            if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
                if (uri.getPathSegments().size() > 1) {
                    searchString = uri.getPathSegments().get(1);
                }
            } else {
                searchString = uri.getQueryParameter("pattern");
            }

            if (TextUtils.isEmpty(searchString)) {
                return null;
            }

            try {
                searchString = String.format("%%%s%%", searchString);
                c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
                        new String[] { searchString });
            } catch (IllegalStateException ex) {
                Log.e(TAG, "got exception: " + ex.toString());
            }
            break;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
    }
    if (c != null) {
        c.setNotificationUri(getContext().getContentResolver(), uri);
    }
    return c;
}

@Override
public Uri insert(Uri uri, ContentValues values) {
    SQLiteDatabase db = mHelper.getWritableDatabase();
    long dataId = 0, noteId = 0, insertedId = 0;
    switch (mMatcher.match(uri)) {
        case URI_NOTE:
            insertedId = noteId = db.insert(TABLE.NOTE, null, values);
            break;
        case URI_DATA:
            if (values.containsKey(DataColumns.NOTE_ID)) {
                noteId = values.getAsLong(DataColumns.NOTE_ID);
            } else {
                Log.d(TAG, "Wrong data format without note id:" + values.toString());
            }
            insertedId = dataId = db.insert(TABLE.DATA, null, values);
            break;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
    }
    // Notify the note uri
    if (noteId > 0) {
        getContext().getContentResolver().notifyChange(
                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
    }

    // Notify the data uri
    if (dataId > 0) {
        getContext().getContentResolver().notifyChange(
                ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
    }

    return ContentUris.withAppendedId(uri, insertedId);
}

@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
    int count = 0;
    String id = null;
    SQLiteDatabase db = mHelper.getWritableDatabase();
    boolean deleteData = false;
    switch (mMatcher.match(uri)) {
        case URI_NOTE:
            selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
            count = db.delete(TABLE.NOTE, selection, selectionArgs);
            break;
        case URI_NOTE_ITEM:
            id = uri.getPathSegments().get(1);
            /**
             * ID that smaller than 0 is system folder which is not allowed to
             * trash
             */
            long noteId = Long.valueOf(id);
            if (noteId <= 0) {
                break;
            }
            count = db.delete(TABLE.NOTE,
                    NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
            break;
        case URI_DATA:
            count = db.delete(TABLE.DATA, selection, selectionArgs);
            deleteData = true;
            break;
        case URI_DATA_ITEM:
            id = uri.getPathSegments().get(1);
            count = db.delete(TABLE.DATA,
                    DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
            deleteData = true;
            break;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
    }
    if (count > 0) {
        if (deleteData) {
            getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
        }
        getContext().getContentResolver().notifyChange(uri, null);
    }
    return count;
}

@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
    int count = 0;
    String id = null;
    SQLiteDatabase db = mHelper.getWritableDatabase();
    boolean updateData = false;
    switch (mMatcher.match(uri)) {
        case URI_NOTE:
            increaseNoteVersion(-1, selection, selectionArgs);
            count = db.update(TABLE.NOTE, values, selection, selectionArgs);
            break;
        case URI_NOTE_ITEM:
            id = uri.getPathSegments().get(1);
            increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
            count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
                    + parseSelection(selection), selectionArgs);
            break;
        case URI_DATA:
            count = db.update(TABLE.DATA, values, selection, selectionArgs);
            updateData = true;
            break;
        case URI_DATA_ITEM:
            id = uri.getPathSegments().get(1);
            count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
                    + parseSelection(selection), selectionArgs);
            updateData = true;
            break;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
    }

    if (count > 0) {
        if (updateData) {
            getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
        }
        getContext().getContentResolver().notifyChange(uri, null);
    }
    return count;
}

private String parseSelection(String selection) {
    return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}

private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
    StringBuilder sql = new StringBuilder(120);
    sql.append("UPDATE ");
    sql.append(TABLE.NOTE);
    sql.append(" SET ");
    sql.append(NoteColumns.VERSION);
    sql.append("=" + NoteColumns.VERSION + "+1 ");

    if (id > 0 || !TextUtils.isEmpty(selection)) {
        sql.append(" WHERE ");
    }
    if (id > 0) {
        sql.append(NoteColumns.ID + "=" + String.valueOf(id));
    }
    if (!TextUtils.isEmpty(selection)) {
        String selectString = id > 0 ? parseSelection(selection) : selection;
        for (String args : selectionArgs) {
            selectString = selectString.replaceFirst("\\?", args);
        }
        sql.append(selectString);
    }

    mHelper.getWritableDatabase().execSQL(sql.toString());
}

@Override
public String getType(Uri uri) {
    // TODO Auto-generated method stub
    return null;
}

}