/* ========================================
   CYST-KID — Shared Constants & Helpers
   ======================================== */

const COLS = 28;
const ROWS = 22;

/* 0=dot 1=wall 2=empty 3=ghostWall 4=ghostDoor 5=tunnel 8=ghostInside */
const MAP = [
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],//0
[1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1],//1
[1,0,1,1,1,0,1,1,1,1,1,1,0,1,1,0,1,1,1,1,1,1,0,1,1,1,0,1],//2
[1,0,1,1,1,0,1,1,1,1,1,1,0,1,1,0,1,1,1,1,1,1,0,1,1,1,0,1],//3
[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],//4
[1,0,1,1,1,0,1,0,1,1,1,1,0,1,1,0,1,1,1,1,0,1,0,1,1,1,0,1],//5
[1,0,0,0,0,0,1,0,0,0,0,1,0,1,1,0,1,0,0,0,0,1,0,0,0,0,0,1],//6
[1,1,1,1,1,0,1,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,0,1,1,1,1,1],//7
[1,1,1,1,1,0,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,0,1,1,1,1,1],//8
[1,1,1,1,1,0,1,2,1,1,1,3,3,4,4,3,3,1,1,1,2,1,0,1,1,1,1,1],//9
[5,2,2,2,2,0,2,2,1,8,8,8,8,8,8,8,8,8,8,1,2,2,0,2,2,2,2,5],//10
[1,1,1,1,1,0,1,2,1,8,8,8,8,8,8,8,8,8,8,1,2,1,0,1,1,1,1,1],//11
[1,1,1,1,1,0,1,2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,1],//12
[1,1,1,1,1,0,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,0,1,1,1,1,1],//13
[1,0,0,0,0,0,0,0,0,1,1,0,1,1,1,1,0,1,1,0,0,0,0,0,0,0,0,1],//14
[1,0,1,1,1,0,1,1,0,1,1,0,1,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1],//15
[1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1],//16
[1,1,1,0,1,0,1,0,1,1,1,1,0,1,1,0,1,1,1,1,0,1,0,1,0,1,1,1],//17
[1,0,0,0,0,0,1,0,0,0,0,1,0,1,1,0,1,0,0,0,0,1,0,0,0,0,0,1],//18
[1,0,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,1,1,1,1,0,1],//19
[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],//20
[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],//21
];

const PL0 = {c:14,r:16};
const PH = [{c:12,r:10},{c:15,r:10},{c:12,r:11},{c:15,r:11}];
const MED_SPAWNS = [{r:13,c:14}];

const TILE = 16;
const HUD_TOP = 44;
const HUD_BOT = 44;
const CW = COLS * TILE;
const CH = ROWS * TILE + HUD_TOP + HUD_BOT;
const FPS = 60;
const TICK = 1000 / FPS;
const BASE_SPD = 2;

// ---- Challenge timing ----
const CHALL_FIRST_MIN = 7;   // seconds before first challenge (min)
const CHALL_FIRST_MAX = 13;  // seconds before first challenge (max)
const CHALL_NEXT_MIN  = 8;   // seconds between challenges (min)
const CHALL_NEXT_MAX  = 15;  // seconds between challenges (max)
const CHALL_DURATION  = 10;  // seconds player has to deliver the med

// ---- Player / Ghost ----
const LIVES           = 3;    // starting lives
const WIN_LEVEL       = 3;    // level at which the player wins
const SPEED_MULT      = 2;    // sprint / super-mode speed multiplier
const COLL_DIST       = 0.8;  // collision detection radius (in tiles)
const GHOST_SPD_BASE  = 1.2;  // ghost base speed (tiles/frame)
const GHOST_SPD_LEVEL = 0.2;  // ghost speed increase per level
const GHOST_SCARED_MULT = 0.55; // ghost speed while scared
const GHOST_REL_INTERVAL = 80;  // frames between ghost releases
const GHOST_REL_OFFSET   = 50;  // frame offset for first ghost release

// ---- Scoring ----
const SC_DOT   = 1;   // points per dot
const SC_GHOST = 5;   // points per scared ghost eaten
const SC_CHALL = 25;  // points for completing a challenge

const CO = {
    bg:'#87CEEB', wall:'#8B5CF6', we:'#A78BFA',
    dot:'#FFF', cys:'#FFB300', cysE:'#FF8F00',
    bag:'#88CC44', bagS:'#222', pB:'#DD2222',
    pBo:'#FFD700', pSc:'#22CC66', kid:'#CC4444',
    kE:'#FFF', sup:'#00DDFF', hud:'#111133', hudT:'#FFF',
    gD:'#FFD700', gW:'#6D28D9'
};

const T_ROW = 10; // tunnel row
const DR={up:-1,down:1,left:0,right:0};
const DC={up:0,down:0,left:-1,right:1};
const OPP={up:'down',down:'up',left:'right',right:'left'};
const DIRS=['up','down','left','right'];

// tile query helpers
function tile(r,c){return(r>=0&&r<ROWS&&c>=0&&c<COLS)?MAP[r][c]:-1}
function isPath(r,c){const t=tile(r,c);return t===0||t===2||t===5}
function plOk(r,c){
    if(r===T_ROW&&(c<0||c>=COLS))return true;
    const t=tile(r,c);return t===0||t===2||t===5;
}
function painOk(r,c){
    if(r===T_ROW&&(c<0||c>=COLS))return true;
    const t=tile(r,c);return t===0||t===2||t===5;
}