import { readFileSync, existsSync } from 'fs';
import { join } from 'path';

const configPath = join(process.cwd(), 'src', 'config', 'config.json');

export interface GameConfigType {
    leveling: {
        base: number;
        exponent: number;
        chat: {
            cooldownMs: number;
            minXp: number;
            maxXp: number;
        }
    },
    economy: {
        daily: {
            amount: bigint;
            streakBonus: bigint;
            cooldownMs: number;
        },
        transfers: {
            allowSelfTransfer: boolean;
            minAmount: bigint;
        }
    },
    inventory: {
        maxStackSize: bigint;
        maxSlots: number;
    },
    commands: Record<string, boolean>;
}

// Initial default config state
export const config: GameConfigType = {} as GameConfigType;

export function reloadConfig() {
    if (!existsSync(configPath)) {
        throw new Error(`Config file not found at ${configPath}`);
    }

    const raw = readFileSync(configPath, 'utf-8');
    const rawConfig = JSON.parse(raw);

    // Update config object in place
    config.leveling = rawConfig.leveling;
    config.economy = {
        daily: {
            ...rawConfig.economy.daily,
            amount: BigInt(rawConfig.economy.daily.amount),
            streakBonus: BigInt(rawConfig.economy.daily.streakBonus),
        },
        transfers: {
            ...rawConfig.economy.transfers,
            minAmount: BigInt(rawConfig.economy.transfers.minAmount),
        }
    };
    config.inventory = {
        ...rawConfig.inventory,
        maxStackSize: BigInt(rawConfig.inventory.maxStackSize),
    };
    config.commands = rawConfig.commands || {};

    console.log("🔄 Config reloaded from disk.");
}

// Initial load
reloadConfig();

// Backwards compatibility alias
export const GameConfig = config;