import * as _express from "express";
import * as _session from "express-session";
import * as _bodyParser from "body-parser";
import * as _http from "http";
import * as winston from "winston";
import * as expressWinston from "express-winston";
import {PublicRouter} from "./routes/PublicRouter";
import {UserRouter} from "./routes/UserRouter";
import {GalleryRouter} from "./routes/GalleryRouter";
import {AdminRouter} from "./routes/AdminRouter";
import {ErrorRouter} from "./routes/ErrorRouter";
import {SharingRouter} from "./routes/SharingRouter";
import {ObjectManagerRepository} from "./model/ObjectManagerRepository";
import {Logger} from "./Logger";
import {Config} from "../common/config/private/Config";
import {DatabaseType} from "../common/config/private/IPrivateConfig";

const LOG_TAG = "[server]";
export class Server {

    private debug: any;
    private app: any;
    private server: any;

    constructor() {
        this.init();
    }

    async init() {
        Logger.info(LOG_TAG, "config:");
        Logger.info(LOG_TAG, JSON.stringify(Config, null, '\t'));

        this.app = _express();

        this.app.use(expressWinston.logger({
            transports: [
                new winston.transports.Console({
                    level: 'silly',
                    json: false,
                    colorize: true,
                    timestamp: function () {
                        return (new Date()).toLocaleString();
                    },
                    formatter: (options) => {
                        // Return string will be passed to logger.
                        return options.timestamp() + '[' + winston['config']['colorize'](options.level, options.level.toUpperCase()) + '] ' +
                            (undefined !== options.message ? options.message : '') +
                            (options.meta && Object.keys(options.meta).length ? '\n\t' + JSON.stringify(options.meta) : '' );
                    },
                    debugStdout: true
                })
            ],
            meta: false, // optional: control whether you want to log the meta data about the request (default to true)
            msg: "HTTP {{req.method}} {{req.url}}", // optional: customize the default logging message. E.g. "{{res.statusCode}} {{req.method}} {{res.responseTime}}ms {{req.url}}"
            expressFormat: true, // Use the default Express/morgan request formatting. Enabling this will override any msg if true. Will only output colors with colorize set to true
            colorize: true, // Color the text and status code, using the Express/morgan color palette (text: gray, status: default green, 3XX cyan, 4XX yellow, 5XX red).
            level: (req) => {
                if (req.url.indexOf("/api/") !== -1) {
                    return "verbose";
                }
                return req.url.indexOf("node_modules") !== -1 ? "silly" : "debug"
            }
        }));

        this.app.set('view engine', 'ejs');


        /**
         * Session above all
         */
        this.app.use(_session({
            name: "pigallery2-session",
            secret: 'PiGallery2 secret',
            cookie: {
                maxAge: 60000 * 10,
                httpOnly: false
            },
            resave: true,
            saveUninitialized: false
        }));

        /**
         * Parse parameters in POST
         */
        // for parsing application/json
        this.app.use(_bodyParser.json());

        if (Config.Server.database.type == DatabaseType.mysql) {
            try {
                await ObjectManagerRepository.InitMySQLManagers();
            } catch (err) {
                Logger.warn(LOG_TAG, "[MYSQL error]", err);
                Logger.warn(LOG_TAG, "Error during initializing mysql falling back to memory DB");
                Config.setDatabaseType(DatabaseType.memory);
                await ObjectManagerRepository.InitMemoryManagers();
            }
        } else {
            await ObjectManagerRepository.InitMemoryManagers();
        }

        if (Config.Server.thumbnail.hardwareAcceleration == true) {
            try {
                const sharp = require("sharp");
                sharp();

            } catch (err) {
                Logger.warn(LOG_TAG, "[Thumbnail hardware acceleration] sharp module error: ", err);

                Logger.warn(LOG_TAG, "Thumbnail hardware acceleration is not possible." +
                    " 'Sharp' node module is not found." +
                    " Falling back to JS based thumbnail generation");
                Config.Server.thumbnail.hardwareAcceleration = false;
            }
        }

        PublicRouter.route(this.app);

        UserRouter.route(this.app);
        GalleryRouter.route(this.app);
        SharingRouter.route(this.app);
        AdminRouter.route(this.app);

        ErrorRouter.route(this.app);


        // Get PORT from environment and store in Express.
        this.app.set('port', Config.Server.port);

        // Create HTTP server.
        this.server = _http.createServer(this.app);

        //Listen on provided PORT, on all network interfaces.
        this.server.listen(Config.Server.port);
        this.server.on('error', this.onError);
        this.server.on('listening', this.onListening);


    }


    /**
     * Event listener for HTTP server "error" event.
     */
    private onError = (error: any) => {
        if (error.syscall !== 'listen') {
            throw error;
        }

        const bind = typeof Config.Server.port === 'string'
            ? 'Pipe ' + Config.Server.port
            : 'Port ' + Config.Server.port;

        // handle specific listen error with friendly messages
        switch (error.code) {
            case 'EACCES':
                Logger.error(LOG_TAG, bind + ' requires elevated privileges');
                process.exit(1);
                break;
            case 'EADDRINUSE':
                Logger.error(LOG_TAG, bind + ' is already in use');
                process.exit(1);
                break;
            default:
                throw error;
        }
    };


    /**
     * Event listener for HTTP server "listening" event.
     */
    private onListening = () => {
        let addr = this.server.address();
        const bind = typeof addr === 'string'
            ? 'pipe ' + addr
            : 'port ' + addr.port;
        Logger.info(LOG_TAG, 'Listening on ' + bind);
    };

}


if (process.env.DEBUG) {
    Logger.debug(LOG_TAG, "Running in DEBUG mode");
}

new Server();