src/config/gameConfig.js

import * as THREE from "three";

// Game settings
export const INITIAL_MONEY = 200;
export const INITIAL_LIVES = 10;

// Audio settings
export const AUDIO_CONFIG = {
  musicVolume: 0.4, // Background music volume (0-1)
  effectsVolume: 0.3, // Sound effects volume (0-1)
  musicEnabled: true, // Enable/disable background music
  effectsEnabled: true, // Enable/disable sound effects
};

// Tower settings
// Define multiple tower types, keeping the original as "basic"
export const TOWER_TYPES = {
  basic: {
    key: "basic",
    name: "Basic Tower",
    type: "basic",
    cost: 50,
    range: 9,
    fireRate: 1.0, // shots per second
    damage: 6,
  },
  slow: {
    key: "slow",
    name: "Slow Tower",
    type: "slow",
    cost: 60,
    range: 8.5,
    fireRate: 0.9,
    damage: 4,
    // On-hit slow: 40% slow (mult 0.6) for 2.5s, refresh on re-hit
    projectileEffect: {
      type: "slow",
      mult: 0.6,
      duration: 2.5,
      color: 0x80d8ff,
      emissive: 0x104a70,
    },
  },
  sniper: {
    key: "sniper",
    name: "Sniper Tower",
    type: "sniper",
    cost: 130,
    // 2x the range of basic
    range: 18,
    // slow fire rate
    fireRate: 0.7, // shots per second (reload ≈ 3.33s)
    damage: 32, // high damage per shot
    // Sniper specific parameters
    aimTime: 0.8, // seconds to aim before firing
    projectileSpeed: 40, // high-speed dart
    // Targeting priority identifier
    targetPriority: "closestToExit",
    // If target moves out of this threshold (>= range) during aiming, cancel
    cancelThreshold: 18,
    // Optional chance to pierce; behavior can be extended later
    pierceChance: 0.0,
  },
  electric: {
    key: "electric",
    name: "Electric Tower",
    type: "electric",
    cost: 200,
    // Set to the smallest tower range (slow tower = 8.5)
    range: 8.5, // world units (scene uses world units; 1 cell = 2 units, so ~4.25 cells)
    fireRate: 1.0, // shots per second
    damage: 25, // per target
    maxTargets: 3,
    // Persist electric arc visuals for 2 seconds
    arcDurationMs: 2000,
    // Visual tuning for arcs (can be read by Tower)
    arc: {
      color: 0x9ad6ff, // light electric blue
      coreColor: 0xe6fbff,
      thickness: 2,
      jitter: 0.25,
      segments: 10,
    },
    // Targeting priority
    targetPriority: "closestToExit",
  },
};
// Back-compat alias for existing code that expects TOWER_CONFIG
export const TOWER_CONFIG = TOWER_TYPES.basic;

// Projectile settings
export const PROJECTILE_SPEED = 18;

// Upgrade settings
export const UPGRADE_MAX_LEVEL = 5;
export const UPGRADE_START_COST = 40;
export const UPGRADE_COST_SCALE = 1.6;
export const UPGRADE_RANGE_SCALE = 1.1; // +10% per level
export const UPGRADE_RATE_SCALE = 1.15; // +15% per level
export const UPGRADE_DAMAGE_SCALE = 1.12; // +12% per level
export const SELL_REFUND_RATE = 0.7;

// Infinite wave scaling configuration (replaces static WAVES array)
export const WAVE_SCALING = {
  // base values (wave 1)
  baseCount: 8,
  baseHP: 12,
  baseSpeed: 3.0,
  baseReward: 5,
  baseSpawnInterval: 0.8,

  // per-wave growth (applied from wave 2 onward)
  countPerWave: 3, // +3 enemies each wave
  hpMultiplierPerWave: 1.15, // HP *= 1.18 each wave
  speedIncrementPerWave: 0.025, // +0.05 speed per wave
  rewardMultiplierPerWave: 1.03, // reward *= 1.03 each wave
  spawnIntervalDecayPerWave: 0.01, // -0.02s per wave

  // safeguards/limits
  minSpawnInterval: 0.3,
  maxSpeed: 5.5,
  roundCountToInt: true,
};

// Compute wave parameters for a given wave number (1-based)
export function getWaveParams(n) {
  const w = WAVE_SCALING;
  const waveNum = Math.max(1, Math.floor(n));

  const countBase = w.baseCount + (waveNum - 1) * w.countPerWave;
  const count = w.roundCountToInt
    ? Math.max(1, Math.round(countBase))
    : Math.max(1, countBase);

  const hp = Math.max(
    1,
    Math.round(w.baseHP * Math.pow(w.hpMultiplierPerWave, waveNum - 1))
  );

  const speed = Math.min(
    w.maxSpeed,
    w.baseSpeed + (waveNum - 1) * w.speedIncrementPerWave
  );

  const reward = Math.max(
    1,
    Math.round(w.baseReward * Math.pow(w.rewardMultiplierPerWave, waveNum - 1))
  );

  const spawnInterval = Math.max(
    w.minSpawnInterval,
    w.baseSpawnInterval - (waveNum - 1) * w.spawnIntervalDecayPerWave
  );

  return { count, hp, speed, reward, spawnInterval };
}

// Grid settings
export const GROUND_SIZE = 72; // slightly larger to allow wider spacing
export const GRID_CELL_SIZE = 2;

// Single-path Z-shaped waypoints from top to bottom.
// Snakes left↔right across the board with vertical steps.
const HALF = GROUND_SIZE / 2;
const PATH_MARGIN = 4 * GRID_CELL_SIZE; // 4 squares (8 units) from edges
const LEFT_X = -HALF + PATH_MARGIN;
const RIGHT_X = HALF - PATH_MARGIN;
const MID_Z = 0; // middle of the board
// Inset start/end vertical lines a bit further from side edges
const EDGE_INSET = 5 * GRID_CELL_SIZE; // 5 cells inward (10 units)
const LEFT_X_IN = LEFT_X + EDGE_INSET;
const RIGHT_X_IN = RIGHT_X - EDGE_INSET;

// Exactly 3 turns: right at top, down at top-right, left at mid, down at mid-left
export const PATH_POINTS = [
  new THREE.Vector3(RIGHT_X_IN, 0, HALF),   // start top-right, straight down (inset)
  new THREE.Vector3(RIGHT_X_IN, 0, MID_Z),  // vertical start segment
  new THREE.Vector3(LEFT_X_IN, 0, MID_Z),   // horizontal across the middle
  new THREE.Vector3(LEFT_X_IN, 0, -HALF),   // vertical to bottom exit (inset)
];

// Disable multi-path branching; keep empty to fallback everywhere to PATH_POINTS
export const PATHS = [];

// Visual settings
export const SCENE_BACKGROUND = 0x202432;

// Road settings
export const ROAD_HALF_WIDTH = 1.5;
export const ROAD_BEVEL_SIZE = 1.2;
export const ROAD_ARC_SEGMENTS = 16;