"use client";

import { useEffect, useState } from "react";
import { getMembers, updateMemberRole, suspendMember, Member } from "@/lib/api";
import { Shield, Ban, CheckCircle, User as UserIcon } from "lucide-react";

export function MembersTab(_props?: { workspaceId?: string }) {
  const [members, setMembers] = useState<Member[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");

  const loadMembers = () => {
    setLoading(true);
    getMembers()
      .then(setMembers)
      .catch((e) => setError(e.message))
      .finally(() => setLoading(false));
  };

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

  const handleRoleChange = (member: Member, newRole: string) => {
    updateMemberRole(member.id, newRole)
      .then(() => {
        setMembers((prev) => prev.map((m) => (m.id === member.id ? { ...m, role: newRole } : m)));
      })
      .catch(console.error);
  };

  const handleSuspend = (member: Member) => {
    const isSuspended = member.status === "suspended";
    suspendMember(member.id, !isSuspended)
      .then(() => {
        setMembers((prev) =>
          prev.map((m) => (m.id === member.id ? { ...m, status: isSuspended ? "active" : "suspended" } : m))
        );
      })
      .catch(console.error);
  };

  const formatDate = (dateStr?: string) => {
    if (!dateStr) return "Never";
    try {
      return new Date(dateStr).toLocaleDateString();
    } catch {
      return dateStr;
    }
  };

  if (loading) {
    return <div className="p-6 text-sm text-gray-400 animate-pulse">Loading members...</div>;
  }

  if (error) {
    return <div className="p-6 text-sm text-slack-red">Error: {error}</div>;
  }

  return (
    <div className="bg-white rounded-lg shadow-sm border border-gray-200 overflow-hidden">
      <div className="overflow-x-auto">
        <table className="w-full text-sm">
          <thead className="bg-gray-50 border-b border-gray-200">
            <tr>
              <th className="px-4 py-2 text-left font-semibold text-gray-600">Member</th>
              <th className="px-4 py-2 text-left font-semibold text-gray-600">Role</th>
              <th className="px-4 py-2 text-left font-semibold text-gray-600">Status</th>
              <th className="px-4 py-2 text-left font-semibold text-gray-600">Last Active</th>
              <th className="px-4 py-2 text-right font-semibold text-gray-600">Actions</th>
            </tr>
          </thead>
          <tbody className="divide-y divide-gray-100">
            {members.length === 0 ? (
              <tr>
                <td colSpan={5} className="px-4 py-8 text-center text-gray-400">
                  No members found.
                </td>
              </tr>
            ) : (
              members.map((member) => {
                const isSuspended = member.status === "suspended";
                const displayName = member.display_name || member.displayName || member.name || member.email;
                return (
                  <tr key={member.id} className="hover:bg-gray-50">
                    {/* Member info */}
                    <td className="px-4 py-3">
                      <div className="flex items-center gap-3">
                        {member.avatar_url ? (
                          <img src={member.avatar_url} alt={displayName} className="w-8 h-8 rounded-full" />
                        ) : (
                          <div className="w-8 h-8 rounded-full bg-slack-purple text-white flex items-center justify-center text-xs font-bold">
                            {displayName[0]?.toUpperCase() || "U"}
                          </div>
                        )}
                        <div>
                          <p className="font-medium text-gray-800">{displayName}</p>
                          <p className="text-xs text-gray-400">{member.email}</p>
                        </div>
                      </div>
                    </td>

                    {/* Role */}
                    <td className="px-4 py-3">
                      <select
                        value={member.role}
                        onChange={(e) => handleRoleChange(member, e.target.value)}
                        className="px-2 py-1 rounded-md border border-gray-300 text-xs focus:outline-none focus:ring-2 focus:ring-slack-purple bg-white"
                      >
                        <option value="member">Member</option>
                        <option value="admin">Admin</option>
                        <option value="owner">Owner</option>
                        <option value="guest">Guest</option>
                      </select>
                    </td>

                    {/* Status */}
                    <td className="px-4 py-3">
                      {isSuspended ? (
                        <span className="inline-flex items-center gap-1 text-xs font-medium text-slack-red">
                          <Ban size={12} />
                          Suspended
                        </span>
                      ) : (
                        <span className="inline-flex items-center gap-1 text-xs font-medium text-slack-green">
                          <CheckCircle size={12} />
                          Active
                        </span>
                      )}
                    </td>

                    {/* Last active */}
                    <td className="px-4 py-3 text-gray-500">{formatDate(member.last_active)}</td>

                    {/* Actions */}
                    <td className="px-4 py-3 text-right">
                      <button
                        onClick={() => handleSuspend(member)}
                        className={`inline-flex items-center gap-1 px-3 py-1 rounded-md text-xs font-medium transition-colors ${
                          isSuspended
                            ? "bg-slack-green/10 text-slack-green hover:bg-slack-green/20"
                            : "bg-slack-red/10 text-slack-red hover:bg-slack-red/20"
                        }`}
                      >
                        {isSuspended ? (
                          <>
                            <UserIcon size={12} />
                            Reactivate
                          </>
                        ) : (
                          <>
                            <Shield size={12} />
                            Suspend
                          </>
                        )}
                      </button>
                    </td>
                  </tr>
                );
              })
            )}
          </tbody>
        </table>
      </div>
    </div>
  );
}