'use strict';

exports = module.exports = {
    add: add,
    del: del,
    get: get,
    getAll: getAll,

    _clear: clear
};

var assert = require('assert'),
    database = require('./database.js'),
    DatabaseError = require('./databaseerror.js');

var MAILBOX_FIELDS = [ 'id', 'name', 'aliasTarget', 'creationTime' ].join(',');

function add(id, name, callback) {
    assert.strictEqual(typeof id, 'string');
    assert.strictEqual(typeof name, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('INSERT INTO mailboxes (id, name) VALUES (?, ?)', [ id, name ], function (error) {
        if (error && error.code === 'ER_DUP_ENTRY') return callback(new DatabaseError(DatabaseError.ALREADY_EXISTS));
        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));

        callback(null);
    });
}

function clear(callback) {
    assert.strictEqual(typeof callback, 'function');

    database.query('TRUNCATE TABLE mailboxes', [], function (error) {
        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
        callback(null);
    });
}

function del(id, callback) {
    assert.strictEqual(typeof id, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('DELETE FROM mailboxes WHERE id=?', [ id ], function (error, result) {
        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
        if (result.affectedRows === 0) return callback(new DatabaseError(DatabaseError.NOT_FOUND));

        callback(null);
    });
}

function get(id, callback) {
    assert.strictEqual(typeof id, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT ' + MAILBOX_FIELDS + ' FROM mailboxes WHERE id=?', [ id ], function (error, results) {
        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
        if (results.length === 0) return callback(new DatabaseError(DatabaseError.NOT_FOUND));

        callback(null, results[0]);
    });
}


function getAll(callback) {
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT ' + MAILBOX_FIELDS + ' FROM mailboxes', function (error, results) {
        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));

        callback(null, results);
    });
}