var EventEmitter = require("events").EventEmitter;
var util = require("util");
var Types = require("./types.js");

//A controler owned buffer representation
function Buffer (client, buffId, path) {
    "use strict";

    EventEmitter.call(this);

    var self = this;
    this.path = path;
    this.title = undefined;
    var typeNum = 0; //WARNING : check if this should be unique to a buffer
    var serNum = 0; //WARNING : check if this should be unique to a buffer

    /* COMMANDS */

    //Add an annotation into buffer. annoType is obtained through defineAnnoType. off is the position
    //The anno id is returned by the call
    this.addAnno = function (annoType, off) {
        serNum += 1;
        client.sendCommand("addAnno", buffId, serNum, annoType,Types.position(off), 0 );
        return serNum;
    };

    //Close the buffer
    this.close = function(){
        client.sendCommand("close", buffId);
    };

    //Define an annotation type. typename : friendly name, glyphFile : icon, fg and bg are the colors
    //The anno type id is returned by the call
    this.defineAnnoType = function (typeName, glyphFile, fg, bg) {
        typeNum += 1;
        client.sendCommand("defineAnnoType", buffId, typeNum, Types.string(typeName), Types.string(""), Types.string(glyphFile), Types.color(fg), Types.color(bg));
        return typeNum;
    };

    //Start listening for insert and remove events on buffer
    this.startDocumentListen = function () {
        client.sendCommand("startDocumentListen", buffId);
    };

    //Stop listening for insert and remove events on buffer
    this.stopDocumentListen = function () {
        client.sendCommand("stopDocumentListen", buffId);
    };

    //Guard an area of the buffer. off is the position, len the length of text
    this.guard = function (off, len) {
        client.sendCommand("guard",buffId, Types.position(off), len); 
    };

    //Tell Vim that the buffer is ready to be used
    this.initDone = function () { 
        client.sendCommand("initdone", buffId);
    };

    //Tell Vim that inserts are done
    this.insertDone = function () {
        client.sendCommand("insertDone", buffId);
    };

    //Tell Vim that the buffer is owned by the controler
    //Réception d'événéments si vrai
    this.netbeansBuffer = function (isNetBeansBuffer) {
        client.sendCommand("netbeansBuffer", buffId, Types.bool(isNetBeansBuffer));   
    };

    //Start an atomic opperation. Vim screen is not updated untill endAtomic is called
    //BUG : Interprété comme un startDocumentListen
    this.startAtomic = function () {
        client.sendCommand("startAtomic", buffId); 
    };

    //End an atomic opperation.
    //BUG : Ne fais rien du tout
    this.endAtomic = function() {
        client.sendCommand("endAtmoic", buffId );
    };
    //Remove and anno 
    this.removeAnno = function (serNum) {
        client.sendCommand("removeAnno",buffId,serNum); 
    };

    //Tell Vim to save the buffer
    this.save = function () {
        client.sendCommand("save", buffId);    
    };

    //Tell Vim that the controler have saved the buffer
    this.saveDone = function () {
        client.sendCommand("saveDone", buffId); 
    };

    //Set the cursor position (and make the buffer the current buffer)
    this.setDot = function (off) {
        client.sendCommand("setDot", buffId, Types.position(off)); 
    };

    //Set the filename of a buffer. It does not actually feed the buffer with file content, use insert for that
    this.setFullName = function (pathName) {
        client.sendCommand("setFullName", buffId, Types.string(pathName)); 
    };

    //Set the modified flag
    this.setModified = function (modified) {
        client.sendCommand("setModified", buffId, Types.bool(modified)); 
    };

    //Set the modtime
    this.setModtime = function (time) {
        client.sendCommand("setModtime", buffId, time); 
    };

    //Set the file as read-only
    this.setReadOnly = function () {
        client.sendCommand("setReadOnly", buffId); 
    };

    //Set the title of the buffer. The title is just an internal name, it's not visible by the user
    this.setTitle = function (name) {
        self.title = name;
        client.sendCommand("setTitle", buffId, Types.string(name)); 
    };

    //Show the buffer
    this.setVisible = function () {
        client.sendCommand("setVisible", buffId, Types.bool(true)); 
    };

    //Show a balloon containing the text around the cursor (GVim only)
    this.showBalloon = function (text) {
        client.sendCommand("showBalloon", buffId,Types.string(text));   
    };

    //Ungard the text. off is the starting position, len the length of the text
    //BUG : Doesn't works at all, text area keeps guard
    this.unguard = function (off, len) {
        client.sendCommand("unguard", buffId, Types.position(off), len); 
    };

    //Edit the file in the current buffer
    this.editFile = function (pathName){
        self.name = pathName;
        client.sendCommand("editFile", buffId, Types.string(pathName));    
    };



    /* FUNCTIONS */


    //Get the length of current buffer.
    this.getLength = function (callback) {
        client.callFunction("getLength", buffId, callback);
    };

    //Get the line position of an anno
    this.getAnno = function (serNum, callback) {
        client.callFunction("getAnno", buffId, serNum, callback);
    };

    //Get the status of modified flag
    this.getModified = function (callback) {
        client.callFunction("getModified", buffId, callback);
    };

    //Return the content of the buffer as string
    this.getText = function (callback) {
        client.callFunction("getText", buffId, callback); 
    };

    //Insert text at the position. Callback get nothing if everything went good, the error otherwise
    this.insert = function (off, text, callback){
        client.callFunction("insert", buffId, Types.position(off), Types.string(text), callback); 
    };

    //Remove text at the position. Callback get nothing if everything went good, the error otherwise
    this.remove = function (off, length, callback) {
        client.callFunction("remove", buffId, Types.position(off), length, callback);
    };
}

util.inherits(Buffer, EventEmitter);

module.exports = Buffer;