/// <reference path="../lib/types.d.ts" />


import url = require('url');
import net = require('net');
import http = require('http');
import Project = require('./project');
import ServiceSocket = require('./ServiceSocket');
import file = require('../lib/FileUtil');
import childProcess = require('child_process');
import parser = require('../parser/Parser');
import os = require("os");
import { data as engineData } from "../EngineData";

var COMPILE_SERVICE_PORT = 51545;
//egret version, use to shutdown if the version is different to the value passed by the build command
var version = process.argv[2];
var projects = {};

var timer: NodeJS.Timer;
var lastBuildTime: number = Date.now();




export namespace server {

    export var serviceCreated = false;

    /**
    * Start Egret Service
    */
    export function run() {
        var server = net.createServer(socket => {
            var ss = new ServiceSocket(socket);
            ss.on("message", msg => handleCommands(msg, ss));
        });
        try {
            server.listen(COMPILE_SERVICE_PORT);
        }
        catch (e) {
            console.error("Service.run", e);
        }
        process.on('uncaughtException', function (e: NodeJS.ErrnoException) {
            console.log("未捕获的异常:", e);
            if (e.code == 'EADDRINUSE') {
                console.log(`无法启动 service, 请检查端口 ${COMPILE_SERVICE_PORT} 是否被占用。`)
            }
        });
        process.on('exit', () => {

        });
    }


    function handleCommands(task: egret.ServiceCommand, serviceSocket: ServiceSocket) {
        console.log("得到任务:", task.command, task.path);
        //|| task.version && task.version != version
        if (task.command == 'shutdown') {
            serviceSocket.send({});
            internal_shutdown();
        }
        var proj: Project = getProject(task.path);
        proj.option = parser.parseJSON(task.option);
        if (task.command == 'init') {
            proj.setServiceSocket(serviceSocket);
        }
        else if (task.command == 'build') {
            // autoExitTimer();
            var buildHandled = false;
            if (task.option.added && task.option.added.length) {
                task.option.added.forEach(file => proj.fileChanged(serviceSocket, task, file, "added"));
                buildHandled = true;
            }
            if (task.option.removed && task.option.removed.length) {
                task.option.removed.forEach(file => proj.fileChanged(serviceSocket, task, file, "removed"));
                buildHandled = true;
            }
            if (task.option.modified && task.option.modified.length) {
                task.option.modified.forEach(file => proj.fileChanged(serviceSocket, task, file, "modified"));
                buildHandled = true;
            }
            if (!buildHandled)
                proj.fileChanged(serviceSocket, task);
        }
        else if (task.command == 'status') {
            var heapTotal: number = task['status']['heapTotal'];
            heapTotal = heapTotal / 1024 / 1024;
            heapTotal = heapTotal | 0;
            console.log(`内存占用: ${heapTotal}M ${proj.path}`);
            let totalmem = engineData.getTotalMem();
            let maxHeap;
            if (totalmem == -1) {
                //取系统最大内存的四分之一，最低500M
                maxHeap = Math.max(require("os").totalmem() / 1024 / 1024 / 4, 500);
            }
            else {
                maxHeap = totalmem;
            }
            if (heapTotal > maxHeap) {
                console.log("内存占用过高,关闭进程:" + proj.path);
                proj.shutdown();
            }
        }
    }

    // function autoExitTimer() {
    //     lastBuildTime = Date.now();
    //     if (timer) {
    //         clearTimeout(timer);
    //     }

    //     timer = <any>setTimeout(shutdown, 10 * 60 * 1000);
    // }




    export function startBackgroundService() {
        serviceCreated = true;
        var cwd = os.tmpdir();
        var options = egret.args;
        var nodePath = process.execPath,
            service = file.joinPath(egret.root, 'tools/bin/egret');
        var startupParams = ['--expose-gc', service, 'service'];
        if (egret.args.target) {
            startupParams.push("--runtime", egret.args.target);
        }
        if (egret.args.experimental) {
            startupParams.push("-exp");
        }
        var server = childProcess.spawn(nodePath, startupParams, {
            detached: true,
            stdio: ['ignore', 'ignore', 'ignore'],
            cwd: cwd
        });

        server.on("exit", () => serviceCreated = false);
    }

    function internal_shutdown() {
        for (var path in projects) {
            var project: Project = projects[path];
            project.shutdown();
        }
        process.exit(0);
    }


    function parseRequest(req: http.ServerRequest): egret.ServiceCommand {
        var uri = url.parse(req.url, true);
        var command = uri.query.q;
        return JSON.parse(command) || {};
    }
}


export namespace client {
    /**
    *  Send command to Compile Service
    */
    export function execCommand(command: egret.ServiceCommand, callback?: Function, startServer = true): ServiceSocket {
        var options = egret.args;
        var requestUrl = getServiceURL(command);
        var client = net.connect(COMPILE_SERVICE_PORT, "127.0.0.1");
        var ss = new ServiceSocket(client);
        client.on('error', function (e) {
            if (!startServer)
                return;
            if (!server.serviceCreated) {
                server.startBackgroundService();
            }
            setTimeout(() => execCommand(command, callback), 200);
        });

        ss.on('message', cmd => callback && callback(cmd, ss));
        ss.send(command);
        return ss;
    }

    export function requestBuild() {

    }


    export function closeServer(path) {
        return new Promise((reslove, reject) => {
            execCommand({
                path,
                command: "shutdown",
                option: egret.args
            }, reslove, false);
        })

    }



    function getServiceURL(params: any) {
        var json = JSON.stringify(params);
        return "http://127.0.0.1:" + COMPILE_SERVICE_PORT + "/?q=" + encodeURIComponent(json);
    }


}


function getProject(path: string) {
    if (!path)
        return null;
    var project: Project;
    if (!projects[path]) {
        project = new Project();
        project.path = path;
        project.init();
        projects[path] = project;
        return project;
    }
    return projects[path];
}