/*Copyright 2015, Pall Thayer (http://pallthayer.dyndns.org)*/

/*These program are free software: you can redistribute them and/or modify
    them under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will rock your world,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.*/

/*Ce Ne Sont Pas les Citrons - 2015-09-19 19:27:04*/
var lemon = function() {
    var started = false;
    var i=0;
    var seed = new AudioContext();
    var fruit = seed.createOscillator();
    var tree = seed.createOscillator();
    fruit.type = 'square';
    tree.type = 'square';
    tree.detune.value = 2;
    var color = seed.createGain();
    fruit.connect(color);
    tree.connect(color);
    var squeeze = seed.createDelay();
    squeeze.delayTime.value = 0.5;
    var juice = seed.createGain();
    juice.gain.value = 0.5;
    squeeze.connect(juice);
    juice.connect(squeeze);
    color.connect(juice);
    color.connect(seed.destination);
    juice.connect(seed.destination);
    var howLong;
    var fvalue;
    
    var buttonUp = function() {
        var bod = document.getElementsByTagName('body');
        var makeButtons = '';
        for(var i=1;i<100;i++) {
            makeButtons += '<input type="button" onclick="lemon.pucker('+(i*100)+')" value="lemon">';
        }
        bod[0].innerHTML = makeButtons;
    };
    
    this.pucker = function(freek) {
        fvalue = freek;
        window.clearInterval(howLong);
        fruit.frequency.value = fvalue;
        tree.frequency.value = fvalue;
        color.gain.value = 0.7;
        if(!started) {
            startFruitTree();
        }
        howLong = setInterval(sing, 50);
    };
    
    var sing = function() {
        color.gain.value -= 0.05;
        fvalue -= 100;
        fruit.frequency.setValueAtTime(fvalue, seed.currentTime);
        tree.frequency.setValueAtTime(fvalue, seed.currentTime);
        if(color.gain.value < 0) {
            window.clearInterval(howLong);
        }
    };
    
    var startFruitTree = function() {
        fruit.start();
        tree.start();
        started = true;
    };
    
    buttonUp();
}