export interface BotConfig {
  rpc: { primary: string; fallback: string[] }
  contracts: {
    lbPair: `0x${string}`
    lbRouter: `0x${string}`
    lbFactory: `0x${string}`
    tokenX: `0x${string}`
    tokenY: `0x${string}`
    wmon: `0x${string}`
    usdc: `0x${string}`
  }
  strategy: {
    numBins: number
    distribution: 'uniform' | 'curve'
    positionSizeUSD: number
    slippageBps: number
    rebalanceCooldownMs: number
    gasLimitMultiplier: number
    pollIntervalMs: number
    maxDailyRebalances: number
  }
  notifications: {
    enabled: boolean
    provider: 'discord' | 'bark' | 'ntfy' | 'pushover'
    endpoint: string
    alertOnRebalance: boolean
    alertOnError: boolean
    alertOnLowBalance: boolean
  }
}

const env = (key: string, fallback = ''): string => process.env[key] ?? fallback

const addr = (key: string, fallback = ''): `0x${string}` => {
  const v = env(key, fallback)
  if (!v.startsWith('0x')) throw new Error(`${key} must start with 0x`)
  return v as `0x${string}`
}

export const CHAIN_ID = 143
export const BIN_STEP = Number(env('BIN_STEP', '5'))
export const MON_DECIMALS = 18
export const USDC_DECIMALS = 6

export const config: BotConfig = {
  rpc: {
    primary: env('MONAD_RPC_URL', 'https://monad-mainnet.g.alchemy.com/v2/public'),
    fallback: env('MONAD_RPC_FALLBACK')
      .split(',')
      .map((s) => s.trim())
      .filter(Boolean),
  },
  contracts: {
    lbPair: addr('LB_PAIR_ADDRESS', '0x5afd3ec861f6104af26e8755abcc1f876de77620'),
    lbRouter: addr('LB_ROUTER_ADDRESS', '0x18556DA13313f3532c54711497A8FedAC273220E'),
    lbFactory: addr('LB_FACTORY_ADDRESS', '0xb43120c4745967fa9b93E79C149E66B0f2D6Fe0c'),
    tokenX: addr('WMON_ADDRESS', '0x3bd359C1119dA7Da1D913D1C4D2B7c461115433A'),
    tokenY: addr('USDC_ADDRESS', '0x754704bc059f8c67012fed69bc8a327a5aafb603'),
    wmon: addr('WMON_ADDRESS', '0x3bd359C1119dA7Da1D913D1C4D2B7c461115433A'),
    usdc: addr('USDC_ADDRESS', '0x754704bc059f8c67012fed69bc8a327a5aafb603'),
  },
  strategy: {
    numBins: Number(env('NUM_BINS', '3')),
    distribution: 'uniform',
    positionSizeUSD: Number(env('POSITION_SIZE_USD', '50')),
    slippageBps: Number(env('SLIPPAGE_BPS', '50')),
    rebalanceCooldownMs: Number(env('REBALANCE_COOLDOWN_MS', '10000')),
    gasLimitMultiplier: Number(env('GAS_LIMIT_MULTIPLIER', '1.2')),
    pollIntervalMs: Number(env('POLL_INTERVAL_MS', '3000')),
    maxDailyRebalances: Number(env('MAX_DAILY_REBALANCES', '50')),
  },
  notifications: {
    enabled: env('DISCORD_WEBHOOK_URL') !== '',
    provider: 'discord' as const,
    endpoint: env('DISCORD_WEBHOOK_URL'),
    alertOnRebalance: true,
    alertOnError: true,
    alertOnLowBalance: true,
  },
}