import {Interfaces} from "./Interfaces"
import * as HTTP from "http";
import url = require("url");

export namespace ChatApi {

    export class ApiServer implements Interfaces.ServerInterface {
        private clientsManager: Interfaces.ClientsManagerInterface;
        private conversationsManager: Interfaces.ConversationsManagerInterface;
        private logger: Interfaces.LoggerInterface;
        private routes: RoutesCollection = {};

        constructor(clientsManager: Interfaces.ClientsManagerInterface, conversationsManager: Interfaces.ConversationsManagerInterface, logger: Interfaces.LoggerInterface, routes: RoutesCollection) {
            this.clientsManager = clientsManager;
            this.conversationsManager = conversationsManager;
            this.logger = logger;
            this.routes = routes;

            this.logger.debug(`Starting API server`);
        }

        processRequest(request: HTTP.IncomingMessage, response: HTTP.ServerResponse) {
            let path = url.parse(request.url).pathname;
            if (this.routes.hasOwnProperty(path)) {
                this.logger.debug(`Processing action "${path}"`);
                let action = this.routes[path];
                action.call(this, request, response);
            } else {
                this.logger.debug(`Action "${path}" not found`);
                response.writeHead(404);
                response.end(`Action "${path}" not found`);
            }
        }

        refreshUsers(request: HTTP.IncomingMessage, response: HTTP.ServerResponse) {
            let content = '';
            request.on('data', (chunk) => {
                content += chunk;
            }).on('end', () => {
                try {
                    let data = JSON.parse(content);
                    this.clientsManager.get(data.id, true).then((client: Interfaces.ClientInterface) => {
                        response.end('Ok');
                    }).catch((err: Error) => {
                        this.logger.error(err.message);
                        this.logger.error(err.stack);
                        response.writeHead(500, {'Content-type': 'text/plain'});
                        response.end(err.message + err.stack);
                    });
                } catch (err) {
                    this.logger.error(err.message);
                    this.logger.error(err.stack);
                    this.logger.error('DATA: '+content);
                    response.writeHead(500, {'Content-type': 'text/plain'});
                    response.end(err.message + "\n" + err.stack + "\nData: "+ content);
                }
            });
        }
    }

    export interface RoutesCollection {
        [path: string]: (request: HTTP.IncomingMessage, response: HTTP.ServerResponse) => void
    }
}