import { parseUnits } from "viem";
import { useWaitForTransactionReceipt, useWriteContract } from "wagmi";
import { hoodquidityVaultsAbi } from "@/lib/abi/HoodquidityVaults";
import { ACTIVE_CHAIN_ID, getActiveDeployment, USD_DECIMALS } from "@/lib/contracts";
import { fmtUsd, fmtCountdown, fmtNum } from "@/lib/format";
import { campaignPoints, isGenesisLp } from "@/lib/points";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { CountUp } from "@/components/CountUp";
import type { CampaignState } from "@/hooks/useCampaigns";
import type { usePosition } from "@/hooks/useCampaigns";

type Position = NonNullable<ReturnType<typeof usePosition>["position"]>;

export function PositionPanel({
  campaign,
  position,
  onSettled,
}: {
  campaign: CampaignState;
  position: Position;
  onSettled: () => void;
}) {
  const deployment = getActiveDeployment();
  const { writeContract, data: txHash, isPending, reset } = useWriteContract();
  const { isLoading: isConfirming, isSuccess } = useWaitForTransactionReceipt({
    hash: txHash,
  });

  if (isSuccess) {
    reset();
    onSettled();
  }

  const busy = isPending || isConfirming;
  const ended = campaign.status === "ended";
  const id = BigInt(campaign.meta.campaignId);

  const exit = () =>
    writeContract({
      address: deployment.vaults,
      abi: hoodquidityVaultsAbi,
      functionName: "withdraw",
      args: [id, parseUnits(position.amountUsd.toString(), USD_DECIMALS)],
      chainId: ACTIVE_CHAIN_ID,
    });

  const claim = () =>
    writeContract({
      address: deployment.vaults,
      abi: hoodquidityVaultsAbi,
      functionName: "claim",
      args: [id],
      chainId: ACTIVE_CHAIN_ID,
    });

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <div className="slabel">LP receipt</div>
        <div className="flex gap-2">
          {isGenesisLp(position.lpIndex) && <Badge tone="mint">Genesis LP</Badge>}
          {position.boosted && <Badge tone="lime">1.5x boosted</Badge>}
        </div>
      </div>

      <div className="space-y-2.5 text-sm">
        <div className="leader">
          <span className="text-fog">Deposited</span>
          <span className="num font-semibold">{fmtUsd(position.amountUsd, false)}</span>
        </div>
        <div className="leader">
          <span className="text-fog">Vault share</span>
          <span className="num font-semibold">
            {campaign.tvlUsd > 0
              ? `${((position.amountUsd / campaign.tvlUsd) * 100).toFixed(1)}%`
              : "0%"}
          </span>
        </div>
        <div className="leader">
          <span className="text-fog">Rewards accrued</span>
          <span className="num font-semibold text-mint">
            {fmtUsd(position.pendingUsd, false)}
          </span>
        </div>
        <div className="leader">
          <span className="text-fog">Rewards claimed</span>
          <span className="num font-semibold">{fmtUsd(position.claimedUsd, false)}</span>
        </div>
        {position.stockAmount > 0 && (
          <div className="leader">
            <span className="text-fog">Stock leg</span>
            <span className="num font-semibold">
              {position.stockAmount.toFixed(4)} {campaign.meta.symbol}
            </span>
          </div>
        )}
        <div className="leader">
          <span className="text-fog">Points</span>
          <span className="num font-semibold text-lime">
            <CountUp
              value={campaignPoints({
                amountUsd: position.amountUsd,
                depositedAt: position.depositedAt,
                boosted: position.boosted,
              })}
              format={(n) => fmtNum(Math.floor(n))}
            />
          </span>
        </div>
        <div className="leader">
          <span className="text-fog">Full rewards unlock</span>
          <span className="num font-semibold">
            {ended ? "Unlocked" : fmtCountdown(campaign.end)}
          </span>
        </div>
      </div>

      <div className="flex gap-3 pt-1">
        {ended ? (
          <>
            <Button
              className="flex-1"
              disabled={busy || position.pendingUsd === 0}
              onClick={claim}
            >
              {busy ? "Confirming..." : "Claim rewards"}
            </Button>
            <Button
              className="flex-1"
              variant="outline"
              disabled={busy || position.amountUsd === 0}
              onClick={exit}
            >
              Withdraw all
            </Button>
          </>
        ) : (
          <Button
            className="flex-1"
            variant="danger"
            disabled={busy || position.amountUsd === 0}
            onClick={exit}
          >
            {busy ? "Confirming..." : "Exit early"}
          </Button>
        )}
      </div>

      {!ended ? (
        <p className="text-[11px] leading-relaxed text-fog-dim">
          Early exit returns your principal minus a 0.1% fee. Accrued campaign
          rewards are forfeited and redistributed to remaining LPs.
        </p>
      ) : (
        <p className="text-[11px] leading-relaxed text-fog-dim">
          Reward payouts carry a 10% platform fee. Points have no monetary
          value and feed future programs.
        </p>
      )}
    </div>
  );
}