'use strict';

exports = module.exports = {
    get: get,
    getByContainerId: getByContainerId,
    add: add,
    exists: exists,
    del: del,
    update: update,
    getAll: getAll,
    getPortBindings: getPortBindings,
    delPortBinding: delPortBinding,

    setAddonConfig: setAddonConfig,
    getAddonConfig: getAddonConfig,
    getAddonConfigByAppId: getAddonConfigByAppId,
    getAddonConfigByName: getAddonConfigByName,
    unsetAddonConfig: unsetAddonConfig,
    unsetAddonConfigByAppId: unsetAddonConfigByAppId,
    getAppIdByAddonConfigValue: getAppIdByAddonConfigValue,

    setHealth: setHealth,
    setTask: setTask,
    getAppStoreIds: getAppStoreIds,

    // subdomain table types
    SUBDOMAIN_TYPE_PRIMARY: 'primary',
    SUBDOMAIN_TYPE_REDIRECT: 'redirect',

    _clear: clear
};

var assert = require('assert'),
    async = require('async'),
    BoxError = require('./boxerror.js'),
    database = require('./database.js'),
    safe = require('safetydance'),
    util = require('util');

var APPS_FIELDS_PREFIXED = [ 'apps.id', 'apps.appStoreId', 'apps.installationState', 'apps.errorJson', 'apps.runState',
    'apps.health', 'apps.containerId', 'apps.manifestJson', 'subdomains.subdomain AS location', 'subdomains.domain',
    'apps.accessRestrictionJson', 'apps.memoryLimit', 'apps.cpuShares',
    'apps.label', 'apps.tagsJson', 'apps.taskId', 'apps.reverseProxyConfigJson', 'apps.servicesConfigJson',
    'apps.sso', 'apps.debugModeJson', 'apps.enableBackup', 'apps.proxyAuth',
    'apps.creationTime', 'apps.updateTime', 'apps.mailboxName', 'apps.mailboxDomain', 'apps.enableAutomaticUpdate',
    'apps.dataDir', 'apps.ts', 'apps.healthTime' ].join(',');

var PORT_BINDINGS_FIELDS = [ 'hostPort', 'type', 'environmentVariable', 'appId' ].join(',');

const SUBDOMAIN_FIELDS = [ 'appId', 'domain', 'subdomain', 'type' ].join(',');

function postProcess(result) {
    assert.strictEqual(typeof result, 'object');

    assert(result.manifestJson === null || typeof result.manifestJson === 'string');
    result.manifest = safe.JSON.parse(result.manifestJson);
    delete result.manifestJson;

    assert(result.tagsJson === null || typeof result.tagsJson === 'string');
    result.tags = safe.JSON.parse(result.tagsJson) || [];
    delete result.tagsJson;

    assert(result.reverseProxyConfigJson === null || typeof result.reverseProxyConfigJson === 'string');
    result.reverseProxyConfig = safe.JSON.parse(result.reverseProxyConfigJson) || {};
    delete result.reverseProxyConfigJson;

    assert(result.hostPorts === null || typeof result.hostPorts === 'string');
    assert(result.environmentVariables === null || typeof result.environmentVariables === 'string');

    result.portBindings = { };
    let hostPorts = result.hostPorts === null ? [ ] : result.hostPorts.split(',');
    let environmentVariables = result.environmentVariables === null ? [ ] : result.environmentVariables.split(',');
    let portTypes = result.portTypes === null ? [ ] : result.portTypes.split(',');

    delete result.hostPorts;
    delete result.environmentVariables;
    delete result.portTypes;

    for (let i = 0; i < environmentVariables.length; i++) {
        result.portBindings[environmentVariables[i]] = { hostPort: parseInt(hostPorts[i], 10), type: portTypes[i] };
    }

    assert(result.accessRestrictionJson === null || typeof result.accessRestrictionJson === 'string');
    result.accessRestriction = safe.JSON.parse(result.accessRestrictionJson);
    if (result.accessRestriction && !result.accessRestriction.users) result.accessRestriction.users = [];
    delete result.accessRestrictionJson;

    result.sso = !!result.sso; // make it bool
    result.enableBackup = !!result.enableBackup; // make it bool
    result.enableAutomaticUpdate = !!result.enableAutomaticUpdate; // make it bool
    result.proxyAuth = !!result.proxyAuth;

    assert(result.debugModeJson === null || typeof result.debugModeJson === 'string');
    result.debugMode = safe.JSON.parse(result.debugModeJson);
    delete result.debugModeJson;

    assert(result.servicesConfigJson === null || typeof result.servicesConfigJson === 'string');
    result.servicesConfig = safe.JSON.parse(result.servicesConfigJson) || {};
    delete result.servicesConfigJson;

    result.alternateDomains = result.alternateDomains || [];
    result.alternateDomains.forEach(function (d) {
        delete d.appId;
        delete d.type;
    });

    let envNames = JSON.parse(result.envNames), envValues = JSON.parse(result.envValues);
    delete result.envNames;
    delete result.envValues;
    result.env = {};
    for (let i = 0; i < envNames.length; i++) { // NOTE: envNames is [ null ] when env of an app is empty
        if (envNames[i]) result.env[envNames[i]] = envValues[i];
    }

    let volumeIds = JSON.parse(result.volumeIds);
    delete result.volumeIds;
    let volumeReadOnlys = JSON.parse(result.volumeReadOnlys);
    delete result.volumeReadOnlys;

    result.mounts = volumeIds[0] === null ? [] : volumeIds.map((v, idx) => { return { volumeId: v, readOnly: !!volumeReadOnlys[idx] }; }); // NOTE: volumeIds is [null] when volumes of an app is empty

    result.error = safe.JSON.parse(result.errorJson);
    delete result.errorJson;

    result.taskId = result.taskId ? String(result.taskId) : null;
}

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

    database.query('SELECT ' + APPS_FIELDS_PREFIXED + ','
        + 'GROUP_CONCAT(CAST(appPortBindings.hostPort AS CHAR(6))) AS hostPorts, GROUP_CONCAT(appPortBindings.environmentVariable) AS environmentVariables, GROUP_CONCAT(appPortBindings.type) AS portTypes, '
        + 'JSON_ARRAYAGG(appEnvVars.name) AS envNames, JSON_ARRAYAGG(appEnvVars.value) AS envValues,'
        + 'JSON_ARRAYAGG(appMounts.volumeId) AS volumeIds, JSON_ARRAYAGG(appMounts.readOnly) AS volumeReadOnlys '
        + ' FROM apps'
        + '  LEFT OUTER JOIN appPortBindings ON apps.id = appPortBindings.appId'
        + '  LEFT OUTER JOIN appEnvVars ON apps.id = appEnvVars.appId'
        + '  LEFT OUTER JOIN subdomains ON apps.id = subdomains.appId AND subdomains.type = ?'
        + '  LEFT OUTER JOIN appMounts ON apps.id = appMounts.appId'
        + ' WHERE apps.id = ? GROUP BY apps.id', [ exports.SUBDOMAIN_TYPE_PRIMARY, id ], function (error, result) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (result.length === 0) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

        database.query('SELECT ' + SUBDOMAIN_FIELDS + ' FROM subdomains WHERE appId = ? AND type = ?', [ id, exports.SUBDOMAIN_TYPE_REDIRECT ], function (error, alternateDomains) {
            if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

            result[0].alternateDomains = alternateDomains;

            postProcess(result[0]);

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

function getByContainerId(containerId, callback) {
    assert.strictEqual(typeof containerId, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT ' + APPS_FIELDS_PREFIXED + ','
        + 'GROUP_CONCAT(CAST(appPortBindings.hostPort AS CHAR(6))) AS hostPorts, GROUP_CONCAT(appPortBindings.environmentVariable) AS environmentVariables, GROUP_CONCAT(appPortBindings.type) AS portTypes,'
        + 'JSON_ARRAYAGG(appEnvVars.name) AS envNames, JSON_ARRAYAGG(appEnvVars.value) AS envValues,'
        + 'JSON_ARRAYAGG(appMounts.volumeId) AS volumeIds, JSON_ARRAYAGG(appMounts.readOnly) AS volumeReadOnlys '
        + ' FROM apps'
        + '  LEFT OUTER JOIN appPortBindings ON apps.id = appPortBindings.appId'
        + '  LEFT OUTER JOIN appEnvVars ON apps.id = appEnvVars.appId'
        + '  LEFT OUTER JOIN subdomains ON apps.id = subdomains.appId AND subdomains.type = ?'
        + '  LEFT OUTER JOIN appMounts ON apps.id = appMounts.appId'
        + ' WHERE containerId = ? GROUP BY apps.id', [ exports.SUBDOMAIN_TYPE_PRIMARY, containerId ], function (error, result) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (result.length === 0) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

        database.query('SELECT ' + SUBDOMAIN_FIELDS + ' FROM subdomains WHERE appId = ? AND type = ?', [ result[0].id, exports.SUBDOMAIN_TYPE_REDIRECT ], function (error, alternateDomains) {
            if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

            result[0].alternateDomains = alternateDomains;
            postProcess(result[0]);

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

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

    database.query('SELECT ' + APPS_FIELDS_PREFIXED + ','
        + 'GROUP_CONCAT(CAST(appPortBindings.hostPort AS CHAR(6))) AS hostPorts, GROUP_CONCAT(appPortBindings.environmentVariable) AS environmentVariables, GROUP_CONCAT(appPortBindings.type) AS portTypes,'
        + 'JSON_ARRAYAGG(appEnvVars.name) AS envNames, JSON_ARRAYAGG(appEnvVars.value) AS envValues,'
        + 'JSON_ARRAYAGG(appMounts.volumeId) AS volumeIds, JSON_ARRAYAGG(appMounts.readOnly) AS volumeReadOnlys '
        + ' FROM apps'
        + '  LEFT OUTER JOIN appPortBindings ON apps.id = appPortBindings.appId'
        + '  LEFT OUTER JOIN appEnvVars ON apps.id = appEnvVars.appId'
        + '  LEFT OUTER JOIN subdomains ON apps.id = subdomains.appId AND subdomains.type = ?'
        + '  LEFT OUTER JOIN appMounts ON apps.id = appMounts.appId'
        + ' GROUP BY apps.id ORDER BY apps.id', [ exports.SUBDOMAIN_TYPE_PRIMARY ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        database.query('SELECT ' + SUBDOMAIN_FIELDS + ' FROM subdomains WHERE type = ?', [ exports.SUBDOMAIN_TYPE_REDIRECT ], function (error, alternateDomains) {
            if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

            alternateDomains.forEach(function (d) {
                var domain = results.find(function (a) { return d.appId === a.id; });
                if (!domain) return;

                domain.alternateDomains = domain.alternateDomains || [];
                domain.alternateDomains.push(d);
            });

            results.forEach(postProcess);

            callback(null, results);
        });
    });
}

function add(id, appStoreId, manifest, location, domain, portBindings, data, callback) {
    assert.strictEqual(typeof id, 'string');
    assert.strictEqual(typeof appStoreId, 'string');
    assert(manifest && typeof manifest === 'object');
    assert.strictEqual(typeof manifest.version, 'string');
    assert.strictEqual(typeof location, 'string');
    assert.strictEqual(typeof domain, 'string');
    assert.strictEqual(typeof portBindings, 'object');
    assert(data && typeof data === 'object');
    assert.strictEqual(typeof callback, 'function');

    portBindings = portBindings || { };

    var manifestJson = JSON.stringify(manifest);

    const accessRestriction = data.accessRestriction || null;
    const accessRestrictionJson = JSON.stringify(accessRestriction);
    const memoryLimit = data.memoryLimit || 0;
    const cpuShares = data.cpuShares || 512;
    const installationState = data.installationState;
    const runState = data.runState;
    const sso = 'sso' in data ? data.sso : null;
    const debugModeJson = data.debugMode ? JSON.stringify(data.debugMode) : null;
    const env = data.env || {};
    const label = data.label || null;
    const tagsJson = data.tags ? JSON.stringify(data.tags) : null;
    const mailboxName = data.mailboxName || null;
    const mailboxDomain = data.mailboxDomain || null;
    const reverseProxyConfigJson = data.reverseProxyConfig ? JSON.stringify(data.reverseProxyConfig) : null;

    var queries = [];

    queries.push({
        query: 'INSERT INTO apps (id, appStoreId, manifestJson, installationState, runState, accessRestrictionJson, memoryLimit, cpuShares, '
            + 'sso, debugModeJson, mailboxName, mailboxDomain, label, tagsJson, reverseProxyConfigJson) '
            + ' VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)',
        args: [ id, appStoreId, manifestJson, installationState, runState, accessRestrictionJson, memoryLimit, cpuShares,
            sso, debugModeJson, mailboxName, mailboxDomain, label, tagsJson, reverseProxyConfigJson ]
    });

    queries.push({
        query: 'INSERT INTO subdomains (appId, domain, subdomain, type) VALUES (?, ?, ?, ?)',
        args: [ id, domain, location, exports.SUBDOMAIN_TYPE_PRIMARY ]
    });

    Object.keys(portBindings).forEach(function (env) {
        queries.push({
            query: 'INSERT INTO appPortBindings (environmentVariable, hostPort, type, appId) VALUES (?, ?, ?, ?)',
            args: [ env, portBindings[env].hostPort, portBindings[env].type, id ]
        });
    });

    Object.keys(env).forEach(function (name) {
        queries.push({
            query: 'INSERT INTO appEnvVars (appId, name, value) VALUES (?, ?, ?)',
            args: [ id, name, env[name] ]
        });
    });

    if (data.alternateDomains) {
        data.alternateDomains.forEach(function (d) {
            queries.push({
                query: 'INSERT INTO subdomains (appId, domain, subdomain, type) VALUES (?, ?, ?, ?)',
                args: [ id, d.domain, d.subdomain, exports.SUBDOMAIN_TYPE_REDIRECT ]
            });
        });
    }

    database.transaction(queries, function (error) {
        if (error && error.code === 'ER_DUP_ENTRY') return callback(new BoxError(BoxError.ALREADY_EXISTS, error.message));
        if (error && error.code === 'ER_NO_REFERENCED_ROW_2') return callback(new BoxError(BoxError.NOT_FOUND, 'no such domain'));
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null);
    });
}

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

    database.query('SELECT 1 FROM apps WHERE id=?', [ id ], function (error, result) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        return callback(null, result.length !== 0);
    });
}

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

    database.query('SELECT ' + PORT_BINDINGS_FIELDS + ' FROM appPortBindings WHERE appId = ?', [ id ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        var portBindings = { };
        for (var i = 0; i < results.length; i++) {
            portBindings[results[i].environmentVariable] = { hostPort: results[i].hostPort, type: results[i].type };
        }

        callback(null, portBindings);
    });
}

function delPortBinding(hostPort, type, callback) {
    assert.strictEqual(typeof hostPort, 'number');
    assert.strictEqual(typeof type, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('DELETE FROM appPortBindings WHERE hostPort=? AND type=?', [ hostPort, type ], function (error, result) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (result.affectedRows !== 1) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

        callback(null);
    });
}

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

    var queries = [
        { query: 'DELETE FROM subdomains WHERE appId = ?', args: [ id ] },
        { query: 'DELETE FROM appPortBindings WHERE appId = ?', args: [ id ] },
        { query: 'DELETE FROM appEnvVars WHERE appId = ?', args: [ id ] },
        { query: 'DELETE FROM appPasswords WHERE identifier = ?', args: [ id ] },
        { query: 'DELETE FROM appMounts WHERE appId = ?', args: [ id ] },
        { query: 'DELETE FROM apps WHERE id = ?', args: [ id ] }
    ];

    database.transaction(queries, function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (results[5].affectedRows !== 1) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

        callback(null);
    });
}

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

    async.series([
        database.query.bind(null, 'DELETE FROM subdomains'),
        database.query.bind(null, 'DELETE FROM appPortBindings'),
        database.query.bind(null, 'DELETE FROM appAddonConfigs'),
        database.query.bind(null, 'DELETE FROM appEnvVars'),
        database.query.bind(null, 'DELETE FROM apps')
    ], function (error) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        return callback(null);
    });
}

function update(id, app, callback) {
    updateWithConstraints(id, app, '', callback);
}

function updateWithConstraints(id, app, constraints, callback) {
    assert.strictEqual(typeof id, 'string');
    assert.strictEqual(typeof app, 'object');
    assert.strictEqual(typeof constraints, 'string');
    assert.strictEqual(typeof callback, 'function');
    assert(!('portBindings' in app) || typeof app.portBindings === 'object');
    assert(!('accessRestriction' in app) || typeof app.accessRestriction === 'object' || app.accessRestriction === '');
    assert(!('alternateDomains' in app) || Array.isArray(app.alternateDomains));
    assert(!('tags' in app) || Array.isArray(app.tags));
    assert(!('env' in app) || typeof app.env === 'object');

    var queries = [ ];

    if ('portBindings' in app) {
        var portBindings = app.portBindings || { };
        // replace entries by app id
        queries.push({ query: 'DELETE FROM appPortBindings WHERE appId = ?', args: [ id ] });
        Object.keys(portBindings).forEach(function (env) {
            var values = [ portBindings[env].hostPort, portBindings[env].type, env, id ];
            queries.push({ query: 'INSERT INTO appPortBindings (hostPort, type, environmentVariable, appId) VALUES(?, ?, ?, ?)', args: values });
        });
    }

    if ('env' in app) {
        queries.push({ query: 'DELETE FROM appEnvVars WHERE appId = ?', args: [ id ] });

        Object.keys(app.env).forEach(function (name) {
            queries.push({
                query: 'INSERT INTO appEnvVars (appId, name, value) VALUES (?, ?, ?)',
                args: [ id, name, app.env[name] ]
            });
        });
    }

    if ('location' in app && 'domain' in app) { // must be updated together as they are unique together
        queries.push({ query: 'DELETE FROM subdomains WHERE appId = ?', args: [ id ]}); // all locations of an app must be updated together
        queries.push({ query: 'INSERT INTO subdomains (appId, domain, subdomain, type) VALUES (?, ?, ?, ?)', args: [ id, app.domain, app.location, exports.SUBDOMAIN_TYPE_PRIMARY ]});

        if ('alternateDomains' in app) {
            app.alternateDomains.forEach(function (d) {
                queries.push({ query: 'INSERT INTO subdomains (appId, domain, subdomain, type) VALUES (?, ?, ?, ?)', args: [ id, d.domain, d.subdomain, exports.SUBDOMAIN_TYPE_REDIRECT ]});
            });
        }
    }

    if ('mounts' in app) {
        queries.push({ query: 'DELETE FROM appMounts WHERE appId = ?', args: [ id ]});
        app.mounts.forEach(function (m) {
            queries.push({ query: 'INSERT INTO appMounts (appId, volumeId, readOnly) VALUES (?, ?, ?)', args: [ id, m.volumeId, m.readOnly ]});
        });
    }

    var fields = [ ], values = [ ];
    for (var p in app) {
        if (p === 'manifest' || p === 'tags' || p === 'accessRestriction' || p === 'debugMode' || p === 'error' || p === 'reverseProxyConfig' || p === 'servicesConfig') {
            fields.push(`${p}Json = ?`);
            values.push(JSON.stringify(app[p]));
        } else if (p !== 'portBindings' && p !== 'location' && p !== 'domain' && p !== 'alternateDomains' && p !== 'env' && p !== 'mounts') {
            fields.push(p + ' = ?');
            values.push(app[p]);
        }
    }

    if (values.length !== 0) {
        values.push(id);
        queries.push({ query: 'UPDATE apps SET ' + fields.join(', ') + ' WHERE id = ? ' + constraints, args: values });
    }

    database.transaction(queries, function (error, results) {
        if (error && error.code === 'ER_DUP_ENTRY') return callback(new BoxError(BoxError.ALREADY_EXISTS, error.message));
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (results[results.length - 1].affectedRows !== 1) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

        return callback(null);
    });
}

function setHealth(appId, health, healthTime, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof health, 'string');
    assert(util.isDate(healthTime));
    assert.strictEqual(typeof callback, 'function');

    var values = { health, healthTime };

    updateWithConstraints(appId, values, '', callback);
}

function setTask(appId, values, options, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof values, 'object');
    assert.strictEqual(typeof options, 'object');
    assert.strictEqual(typeof callback, 'function');

    if (!options.requireNullTaskId)  return updateWithConstraints(appId, values, '', callback);

    if (options.requiredState === null) {
        updateWithConstraints(appId, values, 'AND taskId IS NULL', callback);
    } else {
        updateWithConstraints(appId, values, `AND taskId IS NULL AND installationState = "${options.requiredState}"`, callback);
    }
}

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

    database.query('SELECT id, appStoreId FROM apps', function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null, results);
    });
}

function setAddonConfig(appId, addonId, env, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof addonId, 'string');
    assert(util.isArray(env));
    assert.strictEqual(typeof callback, 'function');

    unsetAddonConfig(appId, addonId, function (error) {
        if (error) return callback(error);

        if (env.length === 0) return callback(null);

        var query = 'INSERT INTO appAddonConfigs(appId, addonId, name, value) VALUES ';
        var args = [ ], queryArgs = [ ];
        for (var i = 0; i < env.length; i++) {
            args.push(appId, addonId, env[i].name, env[i].value);
            queryArgs.push('(?, ?, ?, ?)');
        }

        database.query(query + queryArgs.join(','), args, function (error) {
            if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

            return callback(null);
        });
    });
}

function unsetAddonConfig(appId, addonId, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof addonId, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('DELETE FROM appAddonConfigs WHERE appId = ? AND addonId = ?', [ appId, addonId ], function (error) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null);
    });
}

function unsetAddonConfigByAppId(appId, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('DELETE FROM appAddonConfigs WHERE appId = ?', [ appId ], function (error) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null);
    });
}

function getAddonConfig(appId, addonId, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof addonId, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT name, value FROM appAddonConfigs WHERE appId = ? AND addonId = ?', [ appId, addonId ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null, results);
    });
}

function getAddonConfigByAppId(appId, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT name, value FROM appAddonConfigs WHERE appId = ?', [ appId ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));

        callback(null, results);
    });
}

function getAppIdByAddonConfigValue(addonId, namePattern, value, callback) {
    assert.strictEqual(typeof addonId, 'string');
    assert.strictEqual(typeof namePattern, 'string');
    assert.strictEqual(typeof value, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT appId FROM appAddonConfigs WHERE addonId = ? AND name LIKE ? AND value = ?', [ addonId, namePattern, value ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (results.length === 0) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

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

function getAddonConfigByName(appId, addonId, namePattern, callback) {
    assert.strictEqual(typeof appId, 'string');
    assert.strictEqual(typeof addonId, 'string');
    assert.strictEqual(typeof namePattern, 'string');
    assert.strictEqual(typeof callback, 'function');

    database.query('SELECT value FROM appAddonConfigs WHERE appId = ? AND addonId = ? AND name LIKE ?', [ appId, addonId, namePattern ], function (error, results) {
        if (error) return callback(new BoxError(BoxError.DATABASE_ERROR, error));
        if (results.length === 0) return callback(new BoxError(BoxError.NOT_FOUND, 'App not found'));

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