"use client";

import { useEffect, useState } from "react";

interface Transaction {
  id: string;
  type: "earned" | "spent" | "bonus" | "penalty";
  description: string;
  amount: number;
  timestamp: string;
}

const transactionIcons = {
  earned: (
    <svg className="w-5 h-5 text-green-400" fill="currentColor" viewBox="0 0 20 20">
      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
    </svg>
  ),
  spent: (
    <svg className="w-5 h-5 text-red-400" fill="currentColor" viewBox="0 0 20 20">
      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
    </svg>
  ),
  bonus: (
    <svg className="w-5 h-5 text-yellow-400" fill="currentColor" viewBox="0 0 20 20">
      <path d="M9.049 2.927c.3-.921 1.603-.921 1.902 0l1.07 3.292a1 1 0 00.95.69h3.462c.969 0 1.371 1.24.588 1.81l-2.8 2.034a1 1 0 00-.364 1.118l1.07 3.292c.3.921-.755 1.688-1.54 1.118l-2.8-2.034a1 1 0 00-1.175 0l-2.8 2.034c-.784.57-1.838-.197-1.539-1.118l1.07-3.292a1 1 0 00-.364-1.118L2.98 8.72c-.783-.57-.38-1.81.588-1.81h3.461a1 1 0 00.951-.69l1.07-3.292z" />
    </svg>
  ),
  penalty: (
    <svg className="w-5 h-5 text-orange-400" fill="currentColor" viewBox="0 0 20 20">
      <path fillRule="evenodd" d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z" clipRule="evenodd" />
    </svg>
  ),
};

export default function TransactionHistory() {
  const [transactions, setTransactions] = useState<Transaction[]>([]);
  const [loading, setLoading] = useState(true);
  const [filter, setFilter] = useState<"all" | Transaction["type"]>("all");

  useEffect(() => {
    fetchTransactions();
  }, []);

  const fetchTransactions = async () => {
    try {
      const token = localStorage.getItem("token");
      const response = await fetch("/api/users/me/points", {
        headers: { Authorization: `Bearer ${token}` },
      });
      const data = await response.json();
      if (data.success && data.data) {
        setTransactions(data.data.transactions || []);
      }
    } catch (error) {
      console.error("Failed to fetch transactions:", error);
    } finally {
      setLoading(false);
    }
  };

  const filteredTransactions = filter === "all"
    ? transactions
    : transactions.filter(t => t.type === filter);

  const formatDate = (timestamp: string) => {
    const date = new Date(timestamp);
    const now = new Date();
    const diffMs = now.getTime() - date.getTime();
    const diffMins = Math.floor(diffMs / 60000);
    const diffHours = Math.floor(diffMs / 3600000);
    const diffDays = Math.floor(diffMs / 86400000);

    if (diffMins < 1) return "Just now";
    if (diffMins < 60) return `${diffMins}m ago`;
    if (diffHours < 24) return `${diffHours}h ago`;
    if (diffDays < 7) return `${diffDays}d ago`;
    return date.toLocaleDateString();
  };

  if (loading) {
    return (
      <div className="flex items-center justify-center py-12">
        <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-yellow-500"></div>
      </div>
    );
  }

  return (
    <div className="space-y-6">
      <div className="flex gap-2 flex-wrap">
        {(["all", "earned", "spent", "bonus", "penalty"] as const).map(type => (
          <button
            key={type}
            onClick={() => setFilter(type)}
            className={`px-4 py-2 rounded-lg font-medium transition capitalize ${
              filter === type
                ? "bg-gradient-to-r from-yellow-500 to-orange-500 text-white"
                : "bg-gray-800 text-gray-300 hover:bg-gray-700"
            }`}
          >
            {type}
          </button>
        ))}
      </div>

      <div className="bg-gray-800 border border-gray-700 rounded-xl divide-y divide-gray-700">
        {filteredTransactions.length === 0 ? (
          <div className="text-center py-12">
            <div className="text-gray-400 mb-2">
              <svg className="w-16 h-16 mx-auto opacity-50" fill="currentColor" viewBox="0 0 20 20">
                <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM7 9a1 1 0 000 2h6a1 1 0 100-2H7z" clipRule="evenodd" />
              </svg>
            </div>
            <p className="text-gray-400">No transactions found</p>
          </div>
        ) : (
          filteredTransactions.map(transaction => (
            <div key={transaction.id} className="p-4 hover:bg-gray-750 transition">
              <div className="flex items-center justify-between">
                <div className="flex items-center gap-3">
                  <div className={`p-2 rounded-lg ${
                    transaction.type === "earned" || transaction.type === "bonus"
                      ? "bg-green-500/20"
                      : "bg-red-500/20"
                  }`}>
                    {transactionIcons[transaction.type]}
                  </div>
                  <div>
                    <p className="text-white font-medium">{transaction.description}</p>
                    <p className="text-gray-400 text-sm">{formatDate(transaction.timestamp)}</p>
                  </div>
                </div>
                <div className={`text-xl font-bold ${
                  transaction.amount > 0 ? "text-green-400" : "text-red-400"
                }`}>
                  {transaction.amount > 0 ? "+" : ""}{transaction.amount.toLocaleString()}
                </div>
              </div>
            </div>
          ))
        )}
      </div>
    </div>
  );
}