/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

import Deferred
import Foundation
import Shared

private let log = Logger.syncLogger

class NoSuchSearchKeywordError: MaybeErrorType {
    let keyword: String
    init(keyword: String) {
        self.keyword = keyword
    }
    var description: String {
        return "No such search keyword: \(keyword)."
    }
}

open class SQLiteBookmarks: BookmarksModelFactorySource, KeywordSearchSource {
    let db: BrowserDB
    let favicons: SQLiteFavicons

    static let defaultFolderTitle: String = NSLocalizedString("Untitled", tableName: "Storage", comment: "The default name for bookmark folders without titles.")
    static let defaultItemTitle: String = NSLocalizedString("Untitled", tableName: "Storage", comment: "The default name for bookmark nodes without titles.")

    open lazy var modelFactory: Deferred<Maybe<BookmarksModelFactory>> =
        deferMaybe(SQLiteBookmarksModelFactory(bookmarks: self, direction: .local))

    public init(db: BrowserDB) {
        self.db = db
        self.favicons = SQLiteFavicons(db: self.db)
    }

    open func isBookmarked(_ url: String, direction: Direction) -> Deferred<Maybe<Bool>> {
        let sql = "SELECT id FROM " +
            "(SELECT id FROM \(direction.valueTable) WHERE " +
            " bmkUri = ? AND is_deleted IS NOT 1" +
            " UNION ALL " +
            " SELECT id FROM \(TableBookmarksMirror) WHERE " +
            " bmkUri = ? AND is_deleted IS NOT 1 AND is_overridden IS NOT 1" +
            " LIMIT 1)"
        let args: Args = [url, url]

        return self.db.queryReturnsResults(sql, args: args)
    }

    open func getURLForKeywordSearch(_ keyword: String) -> Deferred<Maybe<String>> {
        let sql = "SELECT bmkUri FROM \(ViewBookmarksBufferOnMirror) WHERE " +
        " keyword = ?"
        let args: Args = [keyword]

        return self.db.runQuery(sql, args: args, factory: { $0["bmkUri"] as! String })
            >>== { cursor in
                if cursor.status == .success {
                    if let str = cursor[0] {
                        return deferMaybe(str)
                    }
                }

                return deferMaybe(NoSuchSearchKeywordError(keyword: keyword))
        }
    }
}