import { useEffect, useState } from "react";
import { useApi } from "../hooks/useApi";
import type { Agent } from "../types";

interface Props {
  addToast: (msg: string, type: "success" | "error") => void;
}

export default function AdminPanel({ addToast }: Props) {
  const api = useApi();
  const [agents, setAgents] = useState<Agent[]>([]);
  const [newAgentId, setNewAgentId] = useState("");
  const [newRole, setNewRole] = useState("agent");
  const [generatedToken, setGeneratedToken] = useState("");
  const [loading, setLoading] = useState(true);

  const loadAgents = async () => {
    try {
      const data = await api.getAgents();
      setAgents(Array.isArray(data) ? data : data.agents || []);
    } catch (e: any) {
      addToast("Failed to load agents: " + e.message, "error");
    } finally {
      setLoading(false);
    }
  };

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

  const handleCreateToken = async () => {
    if (!newAgentId.trim()) return;
    try {
      const data = await api.createToken(newAgentId.trim(), newRole);
      setGeneratedToken(data.token || JSON.stringify(data));
      addToast("Token created", "success");
      setNewAgentId("");
      loadAgents();
    } catch (e: any) {
      addToast("Failed: " + e.message, "error");
    }
  };

  const handleRevoke = async (tokenId: string) => {
    try {
      await api.revokeToken(tokenId);
      addToast("Token revoked", "success");
      loadAgents();
    } catch (e: any) {
      addToast("Failed: " + e.message, "error");
    }
  };

  if (loading) return <div className="text-[#64748b] text-center py-8">Loading agents...</div>;

  return (
    <div className="space-y-6">
      <div className="bg-[#12141a] border border-[#1e2030] rounded-xl p-6">
        <h3 className="text-lg font-bold text-white mb-4" style={{ fontFamily: "var(--font-heading)" }}>Create Agent Token</h3>
        <div className="flex gap-3 items-end flex-wrap">
          <div>
            <label className="block text-xs text-[#64748b] mb-1">Agent ID</label>
            <input value={newAgentId} onChange={(e) => setNewAgentId(e.target.value)} placeholder="agent-name"
              className="px-3 py-2 bg-[#0a0a0c] border border-[#1e2030] rounded-lg text-white text-sm focus:outline-none focus:border-[#3b82f6]" style={{ fontFamily: "var(--font-mono)" }} />
          </div>
          <div>
            <label className="block text-xs text-[#64748b] mb-1">Role</label>
            <select value={newRole} onChange={(e) => setNewRole(e.target.value)}
              className="px-3 py-2 bg-[#0a0a0c] border border-[#1e2030] rounded-lg text-white text-sm focus:outline-none focus:border-[#3b82f6]">
              <option value="agent">Agent</option>
              <option value="admin">Admin</option>
            </select>
          </div>
          <button onClick={handleCreateToken} className="px-4 py-2 bg-[#3b82f6] hover:bg-[#2563eb] text-white text-sm font-semibold rounded-lg transition-colors">
            Generate Token
          </button>
        </div>
        {generatedToken && (
          <div className="mt-4 p-3 bg-[#0a0a0c] border border-green-500/30 rounded-lg">
            <p className="text-xs text-green-400 mb-1">Generated token (copy now, shown once):</p>
            <code className="text-sm text-white break-all" style={{ fontFamily: "var(--font-mono)" }}>{generatedToken}</code>
            <button onClick={() => { navigator.clipboard.writeText(generatedToken); addToast("Copied", "success"); }}
              className="ml-2 text-xs text-[#3b82f6] hover:underline">Copy</button>
          </div>
        )}
      </div>

      <div className="bg-[#12141a] border border-[#1e2030] rounded-xl p-6">
        <h3 className="text-lg font-bold text-white mb-4" style={{ fontFamily: "var(--font-heading)" }}>Agents</h3>
        {agents.length === 0 ? (
          <p className="text-[#64748b] text-sm">No agents found</p>
        ) : (
          <div className="space-y-3">
            {agents.map((agent) => (
              <div key={agent.id} className="flex items-center justify-between p-3 bg-[#0a0a0c] rounded-lg border border-[#1e2030]">
                <div className="flex items-center gap-3">
                  <span className="text-white font-medium" style={{ fontFamily: "var(--font-mono)" }}>{agent.id}</span>
                  <span className={`text-xs px-2 py-0.5 rounded-full font-medium ${
                    agent.role === "admin" ? "bg-purple-500/15 text-purple-400 border border-purple-500/30" : "bg-[#1e2030] text-[#64748b]"
                  }`}>{agent.role}</span>
                </div>
                {agent.tokens?.map((t) => (
                  <button key={t.id} onClick={() => handleRevoke(t.id)}
                    className="text-xs text-red-400 hover:text-red-300 hover:bg-red-500/10 px-2 py-1 rounded transition-colors">
                    Revoke {t.id.slice(0, 8)}...
                  </button>
                ))}
              </div>
            ))}
          </div>
        )}
      </div>
    </div>
  );
}