// Listenn ar skeudennoù evit pep animasion
const anim_dihunet = [[6, 1]];
const anim_dihun = [[0, 0]];
const anim_bazailhat = [[4, 4], [4, 4], [4, 4]];
const anim_kousket = [[0, 3], [1, 3]];
const anim_skrab = [[5, 2], [6, 2], [5, 2], [6, 2], [5, 2], [6, 2]];
const anim_marv = [[6, 4]];

// Ment pep skeudennig (e pixels)
const img_size = 32;

// Padelez pep skeudenn en animasion
const frame_dur = 400;

// Roadennoù all...
let anim;
let frame_i;
let last_frame;
let stad;
let rand;
let img;
let x_pos, y_pos;


function preload() {
  // Karg ar spritesheet e memor an urzhiataer
  img = loadImage("data/toto.png");
}


function setup() {
  createCanvas(400, 400);
  imageMode(CENTER);
  x_pos = width/2;
  y_pos = height-4*img_size;
  last_frame = millis();
  frame_i = 0;
  
  stad = "DIHUNET";
  anim = anim_dihunet;
}


function draw() {
  background(255);
  
  if (millis() - last_frame >= frame_dur) {
    // Tremen d'ar skeudenn da-heul
    frame_i += 1;
    last_frame = millis();
    
    if (stad == "DIHUNET") {
      rand = int(random(20));
      if (rand == 0) {
        // Bazailhat
        anim = anim_bazailhat;
        frame_i = 0;
        stad = "BAZAILHAT";
      } else if (rand == 1) {
        // En em skrabañ
        anim = anim_skrab;
        frame_i = 0;
        stad = "SKRAB";
      }
      
    } else if (stad == "DIHUN") {
      anim = anim_dihunet;
      frame_i = 0;
      stad = "DIHUNET";
      
    } else if (stad == "BAZAILHAT") {
      // Gortoz e vefe echu an animasion araok cheñch stad
      if (frame_i == anim.length) {
        if (random(6) < 1.0) {
          // Mont da gousket
          anim = anim_kousket;
          frame_i = 0;
          stad = "KOUSKET";
        } else {
          // Dihunet
          anim = anim_dihunet;
          frame_i = 0;
          stad = "DIHUNET";
        }
      }
      
    } else if (stad == "KOUSKET") {
      rand = int(random(100));
      if (rand == 0) {
        anim = anim_marv;
        frame_i = 0;
        stad = "MARV";
      } else if (rand < 6) {
        anim = anim_dihun;
        frame_i = 0;
        stad = "DIHUN";
      }
      
    } else if (stad == "SKRAB") {
      if (frame_i == anim.length) {
        anim = anim_dihunet;
        frame_i = 0;
        stad = "DIHUNET";
      }
      
    } else if (stad == "MARV") {
      anim = anim_marv;
    }
    
    // Distreiñ en penn kentañ an animation ma'z eo echu
    if (frame_i >= anim.length) {
      frame_i = 0;
    }
  }
  
  // Tresañ ar skeudenn
  image(img, x_pos, y_pos,
        img_size*4, img_size*4,
        img_size*anim[frame_i][0],
        img_size*anim[frame_i][1],
        img_size, img_size);
}