/*
 *
 * GMP Hello World Tutorial Game
 * Copyright (c) 2010 Trevor Cowley
 * http://gogomakeplay.com/
 *
 * Dual licensed under the MIT and GPL licenses:
 * http://gogomakeplay.com/licenses
 *
 */

G.F.loadMain = function () {

    var i;

    this.AI = G.F.mainAI;

    G.KB.addKeys('LEFT','RIGHT','F');

    // add Global variables
    G.setState({ targetCount:10, targetLetters: ['H','E','L','L','O','W','O','R','L','D'] });

    // create the game Gobs
    G.makeGob('viewport',G,'div',document.getElementById('shell'))
     .setVar({w:200,h:325,nextStyle:{position:'relative'}})
     .turnOn();
    
    G.makeGob('help',G.O.viewport)
     .setVar({y:265, w:200, h:60})
     .setVar({nextSrc:'Press <strong>F</strong> to fire<br /><strong>ARROWS</strong> to move'})
     .turnOn();

    G.makeGob('ship',G.O.viewport)
     .setVar({x:87, y:220, z: 100, w:26, h:30, AI:G.F.shipAI})
     .setVar({nextSrc:'<div id="shipNose"></div><div id="shipWings"></div><div id="shipBody"></div>'})
     .turnOn();

    G.makeGob('bullet',G.O.viewport)
     .setVar({x:-100, y:-100, w:4, h:12, AI:G.F.bulletAI, addClass:'bullet'})
     .setState({firing:0})
     .turnOn();

    G.makeGob('explosion',G.O.viewport)
     .setState({frame:0})
     .setVar({x:-100, y:-100, AI:G.F.explosionAI, addClass:'explosion'})
     .turnOn();

    for (i=0; i<10; i++) {

        G.makeGob('target'+i, G.O.viewport)
         .setVar({x:30+(i%5)*28, y:25+Math.floor(i/5)*40, w:25, h:28, nextSrc:G.S.targetLetters[i]})
         .addClass('target')
         .turnOn();

    }

    // set up one

    G.makeGob('viewport1',G,'div',document.getElementById('shell1'))
     .setVar({w:200,h:325,nextStyle:{position:'relative'}})
     .turnOn();
   

    G.makeGob('help1',G.O.viewport1)
     .setVar({y:265, w:200, h:60})
     .setVar({nextSrc:'Press <strong>F</strong> to fire<br /><strong>ARROWS</strong> to move'})
     .setStyle({color:'#000000', backgroundColor:'#339999'})
     .turnOn();
    
    G.makeGob('ship1',G.O.viewport1)
     .setVar({x:87, y:220, z: 100, w:26, h:30})
     .setStyle({backgroundColor:'#339999'})
     .turnOn();
    

    G.makeGob('bullet1',G.O.viewport1)
     .setVar({x:-100, y:-100, w:4, h:12, addClass:'bullet'})
     .turnOn();

    G.makeGob('explosion1',G.O.viewport1)
     .setVar({x:-100, y:-100, addClass:'explosion'})
     .turnOn();

    for (i=0; i<10; i++) {

        G.makeGob('target1'+i, G.O.viewport1)
         .setVar({x:30+(i%5)*28, y:25+Math.floor(i/5)*40, w:25, h:28, nextSrc:G.S.targetLetters[i]})
         .setStyle({color:'#ffffff'})
         .turnOn();

    }


};

G.F.mainAI = function () {

    var i, target;

    // move ship
    G.O.ship.AI();

    // move/fire bullet
    G.O.bullet.AI();
    
    // animate explosion
    G.O.explosion.AI();

    // explode targets
    for (i=0; i<10; i++) {

        target=G.O['target' + i];

        if (G.O.bullet.checkIntersection(target) ) {

            G.O.bullet.setState({firing:0}).setVar({x:-100,y:-100}).draw();
            target.turnOff();
            G.O.explosion.setVar({x:target.x + 6,y:target.y + 8}).AI('reset').turnOn();
            G.S.targetCount--;

        }

    }

    // reset targets after all have been exploded
    if (G.S.targetCount < 1 && !G.O.explosion.on) {

        for (i=0; i<10; i++) {

            G.O['target' + i].turnOn();

        }

        G.S.targetCount=10;
    }

};

G.F.shipAI  = function () {
    var t=this;

    // move the ship left
    if (G.KB.keys.LEFT.isPressed) {

        if (t.x > 7)  {

            t.setVar({x:t.x-5}).draw();

        }

    }

    // move the ship right
    else if (G.KB.keys.RIGHT.isPressed) {

        if (t.x < 167)  {

            t.setVar({x:t.x+5}).draw();

        }

    }

    return t;

};

G.F.bulletAI  = function () {

    var t=this;

    // start firing from nose of ship
    if (G.KB.keys.F.isPressed && !t.S.firing ) {

        t.S.firing=1;
        t.setVar({x:G.O.ship.x + 11,y: G.O.ship.y+10}).draw();

    }

    // move the bullet up the screen
    if (t.S.firing) {

        if (t.y > 5) t.setVar({y:t.y-18}).draw();
        else  t.setState({firing:0}).setVar({x:-100,y:-100}).draw();

    }

    return t;

};

G.F.explosionAI  = function (cmd) {

    var t=this, F;

    if (cmd == 'reset') t.setState({frame:0}).setVar({ tx:0, ty:0, tw:0, th:0 }).draw();

    else {

        if (!t.on) return t;
        F=t.S.frame;
        if (F < 8) t.setVar({ tx:-(F*F+1), ty:-(F*F+1), tw:F*F*2+2, th:F*F*2+2 }).draw();
        else  t.turnOff();
        t.S.frame++;

    }
    return t;
};

G.makeBlock('main', G.F.loadMain).loadBlock('main');