function coord(x, y) {
  this.x = x;
  this.y = y;
}

function attack(ap, as) {
  this.ap = ap;
  this.as = as;
}

function unit(name, coord, size, hp, attack, range) {
  this.name = name;
  this.coord = coord;
  this.size = size;
  this.hp = hp;
  this.attack = attack;
  this.range = range;
}

function ennemy(name, coord, hp, attack, range, speed) {
  this.name = name;
  this.coord = coord;
  this.hp = hp;
  this.attack = attack;
  this.range = range;
  this.speed = speed;
}

function map(size, unit, ennemy, coins, score, time) {
  this.size = size;
  this.units = unit;
  this.ennemys = ennemy;
  this.coins = coins;
  this.score = score;
  this.time = time;
}

//Faits avancer les ennemis sur la route
function ennemy_forward(ennemy) {
  ennemy.coord.y = ennemy.coord.y + ennemy.speed;
  return ennemy;
}

//Gere une attaque entre un attaquent et un attaqué qui est appellé toute les "as" secondes
function attack_deal(attaquant, defenseur) {
  defenseur.hp = defenseur.hp - attaquant.attack.ap;
}

//fonction boolenne qui repere si un ennemi est a porté sur la map
function test_range(map, unit) {
  for (var k = 0 ; k < map.units.length ; ++k) {
    if ((unit.coord.x > map.units[k].coord.x      // en haut a droite
        && unit.coord.y > map.units[k].coord.y
        && unit.coord.x - map.units[k].coord.x <= unit.range
        && unit.coord.y - map.units[k].coord.y <= unit.range)

        || (unit.coord.x > map.units[k].coord.x   // en bas a droite
        && unit.coord.y < map.units[k].coord.y
        && unit.coord.x - map.units[k].coord.x <= unit.range
        && - unit.coord.y - map.units[k].coord.y <= unit.range)

        || (unit.coord.x < map.units[k].coord.x   // en bas a gauche
        && unit.coord.y < map.units[k].coord.y
        && - unit.coord.x - map.units[k].coord.x <= unit.range
        && - unit.coord.y - map.units[k].coord.y <= unit.range)

        || (unit.coord.x < map.units[k].coord.x    // en haut a gauche
        && unit.coord.y > map.units[k].coord.y
        && - unit.coord.x - map.units[k].coord.x <= unit.range
        && unit.coord.x - map.units[k].coord.x <= unit.range)) {
      return true;
    } else {
      return false;
    }
  }
}

//fonction qui gère l'apparition d'ennemi
function ennemy_spawn(map) {
  rand = Math.floor((Math.random() * 3) + 1);
  if (rand == 1) {
    map.ennemys[map.ennemys.length] = new ennemy(new coord(0,250), 400, new attack(500,2), 20, 20);
  }
  if (rand == 2) {
    map.ennemys[map.ennemys.length] = new ennemy(new coord(0,250), 500, new attack(500,2), 5, 10);
  }
  else {
    map.ennemys[map.ennemys.length] = new ennemy(new coord(0,250), 200, new attack(500,2), 100, 15);
  }
}

//fonction qui renvoie 0 si auncune condition remplie, 1 si victoire, -1 si défaite
//~ function win_condition (map) {
  //~ if () == 0) {
    //~ return 1;
  //~ }
  //~ if (map.units[0].hp <= 0) {
    //~ return -1;
  //~ }
  //~ return 0;
//~ }

//~ var tour1 = new unit (new coord(100,100), 500, 500, 200);
//~ var archer1 = new ennemy(new coord(-120,120), 500, new attack(500,2), 20, 10);
var map1 = new map (500, [], [], 500, 500, 0);
ennemy_spawn(map1);
alert(map.ennemys[0].hp);
//window.onload = function() {
    //var canvas = document.getElementById('mon_canvas');
    //if (!canvas) {
      //alert("Erreur canvas");
      //return;
    //}
    //var context = canvas.getContext('2d');
    //if (!context) {
      //alert("Erreur context canvas");
      //return;
    //}
//}