class Button
{
    private title:string;
    private type:string;

    constructor(title:string, type:string)
    {
        this.title = title;
        this.type = type;
    }

}
class PostbackButton extends Button
{
    private payload:string;
    constructor(title:string, payload:string)
    {
        super(title, "postback");
        this.payload = payload;
    }
}


class URLButton extends Button
{

    private url:string;

    private webview_height_ratio:string = "compact";
    constructor(title:string, url:string)
    {
        super(title, "web_url");
        this.url = url;

    }


}
class QuickReply
{

}
class QuickText extends QuickReply{
    private title:string;
    private payload:string;
    constructor(title:string, payload:string)
    {
        super();
        this.title = title;
        this.payload = payload;
    }

}
class loc extends QuickReply
{
    private content_type:string = "location";
    constructor()
    {
        super();
    }

}
class Payload
{}

class Attachment
{
    type:string;
    public static TYPE_TEMPLATE:string = "template";
    public static TYPE_IMAGE:string = "image";
    private payload:Payload;

    constructor(type:string)
    {
        this.type = type;

    }
    insertPayload(payload:Payload)
    {
        this.payload = payload;
    }
}
class ButtonPayload extends Payload
{
    text:string;
    buttons:Array<Button>;
    template_type:string = "button";
    constructor(text:string)
    {
        super();
        this.text = text;
        this.buttons = new Array<Button>();
    }
    addButton(b:Button)
    {
        this.buttons.push(b);
    }
}



class ImagePayload
{
    url:string;
    constructor(url:string)
    {
        this.url = url;
    }
}
class Recipient
{
    private id:string;
    constructor(id:string)

    {
        this.id = id;
    }
}
class SenderStatus
{
    public static SEEN = "mark_seen";
    public static TYPING_OFF = "typing_off";
    public static TYPING_ON = "typing_on";
}

class Message {
    fb_id:string;
    textMsg:string = "";
    quickreplies:Array<QuickReply>;
    buttons:Array<Button>;
    senderstatus:string;;
    seen:string;

    attachment:Attachment;

    constructor()
    {
        this.buttons = new Array<Button>();
        this.quickreplies = new Array<QuickReply>();


    }

    to(facebook_id:string)
    {
        this.fb_id = facebook_id;
    }
    text(textMsg:string)
    {
        this.textMsg = textMsg;
    }
    quickText(title:string, payload:string)
    {
        this.quickreplies.push(new QuickText(title, payload));
    }
    postbackButton(title:string, payload:string)
    {
        this.buttons.push(new PostbackButton(title, payload));
    }
    urlButton(title:string, url:string)
    {
        this.buttons.push(new URLButton(title, url));
    }
    senderStatus(senderstatus:string)
    {
        this.senderstatus = senderstatus;
    }

    requestLocation()
    {
        this.quickreplies.push(new loc());
    }
    addAttachment(attachment:Attachment)
    {
        this.attachment = attachment;
    }

    generate()
    {

        let main_reply:any = {};
        //Recipient
        let recipient:any = {id:this.fb_id};
        main_reply['recipient'] = recipient;

        //Defining Message Body

        let msg:any = {};
        if(this.textMsg!="")
        {
            msg['text'] = this.textMsg;
        }
        if(this.quickreplies.length>0)
        {
            msg['quick_replies'] = this.quickreplies;

        }
        if(this.buttons.length>0)
        {
            msg['buttons'] = this.buttons;

        }
        if(this.senderstatus!=null || this.senderstatus!="")
        {
             msg['sender_action'] = this.senderstatus;
        }
        if(this.attachment!=null)
        {
            msg['attachment'] = this.attachment;
        }

        main_reply['message'] = msg;
        return JSON.stringify(main_reply, null, 2);
    }

}

let attach = new Attachment(Attachment.TYPE_IMAGE);
let i = new ImagePayload("http://imageurl.com");
attach.insertPayload(i);

let msg = new Message();
msg.to("1234");
msg.text("Have ?");
msg.quickText("yes", 'y');
msg.quickText("No", 'n');
msg.postbackButton("Stop msg", 'stop');
msg.urlButton("Test", "http://google.com");
msg.requestLocation();
msg.addAttachment(attach);
msg.senderStatus(SenderStatus.TYPING_ON);
let res = msg.generate();
console.log(res);