package com.beem.project.beem.provider;

import java.util.HashMap;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.text.TextUtils;

public class UserProvider extends ContentProvider {

	private final static String				TAG = "UserProvider";

	private static HashMap<String, String>	sUsersProjectionMap;

	private static final int				USERS = 1;
	private static final int				USER_ID = 2;

	private static final UriMatcher			sUriMatcher;
	private BeemDatabaseHelper				mOpenHelper;

	@Override
	public int delete(Uri uri, String selection, String[] selectionArgs) {
		SQLiteDatabase db = mOpenHelper.getWritableDatabase();
		int count;

		switch (sUriMatcher.match(uri)) {
		case USERS:
			count = db.delete(Beem.USERS_TABLE_NAME, selection, selectionArgs);
			break;

		case USER_ID:
			String userID = uri.getPathSegments().get(1);
			count = db.delete(Beem.USERS_TABLE_NAME, Beem.Users._ID + "=" + userID
					+ (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""), selectionArgs);
			break;

		default:
			throw new IllegalArgumentException("Unknown URI " + uri);
		}

		getContext().getContentResolver().notifyChange(uri, null);
		return count;
	}

	@Override
	public String getType(Uri uri) {
		switch (sUriMatcher.match(uri)) {
		case USERS:
			return Beem.Users.CONTENT_TYPE;

		case USER_ID:
			return Beem.Users.CONTENT_ITEM_TYPE;

		default:
			throw new IllegalArgumentException("Unknown URI " + uri);
		}
	}

	@Override
	public Uri insert(Uri uri, ContentValues initialValues) {
        // Validate the requested uri
        if (sUriMatcher.match(uri) != USERS) {
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        ContentValues values;
        if (initialValues != null) {
            values = new ContentValues(initialValues);
        } else {
            values = new ContentValues();
        }

        Long now = Long.valueOf(System.currentTimeMillis());

        // Make sure that the fields are all set
        if (values.containsKey(Beem.Users.JUSERNAME) == false) {
            throw new SQLException("No JUSERNAME specified. Failed to insert row into " + uri);
        }
        
        if (values.containsKey(Beem.Users.DATE_CREATED) == false) {
            values.put(Beem.Users.DATE_CREATED, now);
        }

        if (values.containsKey(Beem.Users.DATE_MODIFIED) == false) {
            values.put(Beem.Users.DATE_MODIFIED, now);
        }

        SQLiteDatabase db = mOpenHelper.getWritableDatabase();
        long rowId = db.insert(Beem.USERS_TABLE_NAME, Beem.Users._ID, values);
        if (rowId > 0) {
            Uri userUri = ContentUris.withAppendedId(Beem.Users.CONTENT_URI, rowId);
            getContext().getContentResolver().notifyChange(userUri, null);
            return userUri;
        }

        throw new SQLException("Failed to insert row into " + uri);
	}

	@Override
	public boolean onCreate() {
		mOpenHelper = new BeemDatabaseHelper(getContext(), TAG, Beem.USERS_TABLE_NAME, Beem.Users.QUERY_CREATE);
		return true;
	}

	@Override
	public Cursor query(Uri uri, String[] projection, String selection,
			String[] selectionArgs, String sortOrder) {
		SQLiteQueryBuilder qb = new SQLiteQueryBuilder();

		switch (sUriMatcher.match(uri)) {
		case USERS:
			qb.setTables(Beem.USERS_TABLE_NAME);
			qb.setProjectionMap(sUsersProjectionMap);
			break;

		case USER_ID:
			qb.setTables(Beem.USERS_TABLE_NAME);
			qb.setProjectionMap(sUsersProjectionMap);
			qb.appendWhere(Beem.Users._ID + "=" + uri.getPathSegments().get(1));
			break;

		default:
			throw new IllegalArgumentException("Unknown URI " + uri);        
		}

		// If no sort order is specified use the default
		String orderBy;
		if (TextUtils.isEmpty(sortOrder)) {
			orderBy = Beem.Users.DEFAULT_SORT_ORDER;
		} else {
			orderBy = sortOrder;
		}

		// Get the database and run the query
		SQLiteDatabase db = mOpenHelper.getReadableDatabase();
		Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, orderBy);

		// Tell the cursor what uri to watch, so it knows when its source data changes
		c.setNotificationUri(getContext().getContentResolver(), uri);
		return c;
	}

	@Override
	public int update(Uri uri, ContentValues values, String selection,
			String[] selectionArgs) {
        SQLiteDatabase db = mOpenHelper.getWritableDatabase();
        int count;
        
        switch (sUriMatcher.match(uri)) {
        case USERS:
            count = db.update(Beem.USERS_TABLE_NAME, values, selection, selectionArgs);
            break;

        case USER_ID:
            String userId = uri.getPathSegments().get(1);
            count = db.update(Beem.USERS_TABLE_NAME, values, Beem.Users._ID + "=" + userId
                    + (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""), selectionArgs);
            break;

        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        getContext().getContentResolver().notifyChange(uri, null);
        return count;
	}

	static {
		sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
		sUriMatcher.addURI(Beem.AUTHORITY, "users", USERS);
		sUriMatcher.addURI(Beem.AUTHORITY, "users/#", USER_ID);

		sUsersProjectionMap = new HashMap<String, String>();
		sUsersProjectionMap.put(Beem.Users._ID, Beem.Users._ID);
		sUsersProjectionMap.put(Beem.Users.JUSERNAME, Beem.Users.JUSERNAME);
		sUsersProjectionMap.put(Beem.Users.DATE_CREATED, Beem.Users.DATE_CREATED);
		sUsersProjectionMap.put(Beem.Users.DATE_MODIFIED, Beem.Users.DATE_MODIFIED);
	}
}