/**
 * Polymarket CTF redeem: burn winning outcome tokens → receive USDC.
 *
 * Regular markets: call CTF contract `redeemPositions`
 * Neg risk markets: call NegRiskAdapter `redeemPositions`
 *
 * Polygon gas is ~0.001 MATIC per tx, negligible cost.
 */

// Contract addresses (Polygon mainnet)
const CTF_ADDRESS = '0x4D97DCd97eC945f40cF65F87097ACe5EA0476045' as const;
const NEG_RISK_ADAPTER = '0xd91E80cF2E7be2e162c6513ceD06f1dD0dA35296' as const;
const USDC_ADDRESS = '0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174' as const;

// Zero bytes32 for parentCollectionId
const PARENT_COLLECTION_ID = '0x0000000000000000000000000000000000000000000000000000000000000000' as const;

// CTF + NegRiskAdapter share the same redeemPositions ABI
const REDEEM_ABI = [
  {
    name: 'redeemPositions',
    type: 'function',
    stateMutability: 'nonpayable',
    inputs: [
      { name: 'collateralToken', type: 'address' },
      { name: 'parentCollectionId', type: 'bytes32' },
      { name: 'conditionId', type: 'bytes32' },
      { name: 'indexSets', type: 'uint256[]' },
    ],
    outputs: [],
  },
] as const;

/**
 * Build redeem tx params for wagmi writeContract.
 * indexSets [1, 2] redeems both YES and NO outcomes.
 */
export function buildRedeemParams(conditionId: string, negRisk: boolean) {
  return {
    address: negRisk ? NEG_RISK_ADAPTER : CTF_ADDRESS,
    abi: REDEEM_ABI,
    functionName: 'redeemPositions' as const,
    args: [
      USDC_ADDRESS,
      PARENT_COLLECTION_ID,
      conditionId as `0x${string}`,
      [1n, 2n], // both outcomes
    ] as const,
  };
}