import { grid, cols, rows } from './state.js';
import { config } from './config.js';

export function updateGrass(x, y, cell) {
    // Static, but infects dirt
    if (Math.random() < config.grass.growChance * 0.1) {
        const neighbors = [[0, 1], [0, -1], [1, 0], [-1, 0]];
        const n = neighbors[Math.floor(Math.random() * neighbors.length)];
        const nx = x + n[0], ny = y + n[1];
        
        if (nx >= 0 && nx < cols && ny >= 0 && ny < rows && grid[nx][ny] && grid[nx][ny].type === 'dirt') {
            grid[nx][ny].type = 'grass';
            grid[nx][ny].color = '#00FF00';
            grid[nx][ny].updated = true;
        }
    }
    
    // Organic Growth (Feeler branches)
    if (Math.random() < config.grass.growChance) {
        const growOptions = [
            { dx: 0, dy: -1 }, // Up
            { dx: -1, dy: -1 }, // Up-Left
            { dx: 1, dy: -1 }  // Up-Right
        ];
        const opt = growOptions[Math.floor(Math.random() * growOptions.length)];
        const nx = x + opt.dx, ny = y + opt.dy;
        if (nx >= 0 && nx < cols && ny >= 0 && ny < rows && !grid[nx][ny]) {
            grid[nx][ny] = { type: 'grass', color: '#00FF00', updated: true };
        }
    }
}