//
// Copyright (c) 2012 Rodolphe Breard
// 
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// 
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//

var Tab = function(name) {
    this.closeHandler = null;
    this.name = this.filterName(name);
    this.wr_lst = document.getElementById('tab-lst');
    this.wr_body = document.getElementById('tab-body-wrapper');
    this.initListElement();
    this.initBodyElement();
};

Tab.prototype.filterName = function(name) {
    // TODO: enforce an id compliant name
    return name;
};

Tab.prototype.initListElement = function() {
    var inner = document.createElement('span'),
    evt_click = function(elem) {
	return function() {
	    elem.show();
	};
    },
    evt_dblclick = function(elem) {
	return function() {
	    elem.close();
	};
    };

    inner.innerHTML = this.name;
    this.el_lst = document.createElement('li');
    this.el_lst.addEventListener('click', evt_click(this), false);
    this.el_lst.addEventListener('dblclick', evt_dblclick(this), false);

    this.el_lst.appendChild(inner);
    this.wr_lst.appendChild(this.el_lst);
};

Tab.prototype.initBodyElement = function() {
    var chat_input = document.createElement('input'),
    chat_input_w = document.createElement('div');

    this.chat_log = document.createElement('p');
    this.chat_log.classList.add('chat-log');
    this.el_body = document.createElement('div');
    this.el_body.classList.add('tab-body');
    this.el_body.id = this.name;
    this.el_body.style.display = 'none';
    chat_input_w.classList.add('chat-input-wrapper');
    chat_input.classList.add('chat-input');
    chat_input.setAttribute('type', 'text');

    chat_input_w.appendChild(chat_input);
    this.el_body.appendChild(this.chat_log);
    this.el_body.appendChild(chat_input_w);
    this.wr_body.appendChild(this.el_body);
};

Tab.prototype.registerCloseHandler = function(func) {
    this.closeHandler = func;
};

Tab.prototype.getNextTabName = function() {
    var i, prev = null;

    for (i = this.wr_body.children.length - 1; i > 1; --i) {
	if (this.wr_body.children[i].id === this.name) {
	    if (prev === null) {
		prev = this.wr_body.children[i - 1].id;
	    }
	    break ;
	}
	prev = this.wr_body.children[i].id;
    }

    return prev;
}

Tab.prototype.close = function() {
    if (this.closeHandler !== null) {
	this.closeHandler(this);
    }
    this.wr_body.removeChild(this.el_body);
    this.wr_lst.removeChild(this.el_lst);
};

Tab.prototype.hide = function() {
    this.el_lst.classList.remove('tab-current');
    this.el_body.style.display = 'none';
};

Tab.prototype.show = function() {
    for (var i = this.wr_body.children.length - 1; i >= 0; --i) {
	this.wr_body.children[i].style.display = 'none';
    }
    this.el_body.style.display = 'block';
    this.chat_log.scrollTop = 42000;
    this.setCurrent();
};

Tab.prototype.setCurrent = function() {
    var i, elems = document.getElementsByClassName('tab-current');

    for (i = elems.length - 1; i >= 0; --i) {
	elems[i].classList.remove('tab-current');
    }
    this.el_lst.classList.remove('tab-active');
    this.el_lst.classList.add('tab-current');
}

Tab.prototype.appendText = function(text) {
    // TODO: flush text
    this.chat_log.innerHTML += text + '<br>';
};