var mysql = require('mysql');
var client = mysql.createConnection({
    host: '127.0.0.1' || '172.24.13.5',
    user: 'lcq' || 'root',
    password: 'fendoubuxi596320' || 'root123',
    database: 'mybookmarks',
    multipleStatements: true,
    port: 3306
});

client.connect();

var db = {

}

db.insertBookmark = function(user_id, bookmark) {
    var sql = "INSERT INTO `bookmarks` (`user_id`, `title`, `description`, `url`, `public`, `click_count`) VALUES ('" + user_id + "', '" + bookmark.title + "', '" + bookmark.description + "', '" + bookmark.url + "', '" + bookmark.public + "', '1')";
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve(result.insertId);
            }
        });
    });
};

db.insertTagsBookmarks = function(tags, bookmard_id) {
    sql = "INSERT INTO `tags_bookmarks` (`tag_id`, `bookmark_id`) VALUES";
    for (var i = 0; i < tags.length; i++) {
        if (i >= 1) {
            sql += ','
        }
        sql += "('" + tags[i] + "', '" + bookmard_id + "')";
    }
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve();
            }
        });
    });
}

db.updateLastUseTags = function(user_id, tags) {
    sql = "UPDATE tags SET last_use = NOW() WHERE user_id = '" + user_id + "' AND id in (";
    for (var i = 0; i < tags.length; i++) {
        if (i >= 1) {
            sql += ','
        }
        sql += "'" + tags[i] + "'";
    }
    sql += ')'
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve();
            }
        });
    });
}

db.clickBookmark = function(id) {
    var sql = "UPDATE `bookmarks` SET `click_count`=`click_count`+1, `last_click`=now() WHERE (`id`='" + id + "')";
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve(result.affectedRows);
            }
        });
    });
};

db.checkLogin = function(username, password) {
    console.log('checkLogin');
    var sql = "SELECT * FROM `users` WHERE `username` = '" + username + "'";
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                var ret = {
                    logined: false,
                    user: {},
                }
                if (password === result[0].password) {
                    ret.logined = true;
                    ret.user = result[0];
                }

                resolve(ret);
            }
        });
    });
};

db.updateUserLastLogin = function(id) {
    console.log('updateUserLastLogin');
    var sql = "UPDATE `users` SET `last_login`=now() WHERE (`id`='" + id + "')";
    return new Promise(function(resolve, reject) {
        client.query(sql, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve(result.affectedRows);
            }
        });
    });
}

module.exports = db;