import { useState } from 'react';

export default function PermissionIndicator({ userRole, visibility, showTooltip = true }) {
  const [showDetails, setShowDetails] = useState(false);

  const getRoleInfo = (role) => {
    switch (role) {
      case 'owner':
        return {
          icon: '👑',
          label: 'Owner',
          color: '#f59e0b',
          permissions: ['View', 'Edit', 'Delete', 'Manage Users', 'Change Visibility']
        };
      case 'editor':
        return {
          icon: '✏️',
          label: 'Editor',
          color: '#10b981',
          permissions: ['View', 'Edit', 'Add/Remove Cards']
        };
      case 'viewer':
        return {
          icon: '👁️',
          label: 'Viewer',
          color: '#6b7280',
          permissions: ['View Only']
        };
      default:
        return {
          icon: '🔒',
          label: 'No Access',
          color: '#ef4444',
          permissions: []
        };
    }
  };

  const getVisibilityInfo = (vis) => {
    switch (vis) {
      case 'public':
        return {
          icon: '🌍',
          label: 'Public',
          color: '#10b981',
          description: 'Anyone can view this collection'
        };
      case 'invite-only':
        return {
          icon: '👥',
          label: 'Invite Only',
          color: '#f59e0b',
          description: 'Only invited users can access'
        };
      case 'private':
        return {
          icon: '🔒',
          label: 'Private',
          color: '#6b7280',
          description: 'Only you can access this collection'
        };
      default:
        return {
          icon: '❓',
          label: 'Unknown',
          color: '#6b7280',
          description: 'Visibility not set'
        };
    }
  };

  const roleInfo = getRoleInfo(userRole);
  const visibilityInfo = getVisibilityInfo(visibility);

  return (
    <div className="flex items-center space-x-2">
      {/* Role Badge */}
      {userRole && (
        <div className="relative">
          <div
            className="flex items-center space-x-1 px-2 py-1 rounded-full text-xs font-medium cursor-pointer"
            style={{ 
              backgroundColor: `${roleInfo.color}20`,
              color: roleInfo.color,
              border: `1px solid ${roleInfo.color}40`
            }}
            onMouseEnter={() => showTooltip && setShowDetails(true)}
            onMouseLeave={() => setShowDetails(false)}
          >
            <span>{roleInfo.icon}</span>
            <span>{roleInfo.label}</span>
          </div>

          {/* Role Tooltip */}
          {showDetails && showTooltip && (
            <div 
              className="absolute bottom-full left-0 mb-2 p-3 rounded-lg shadow-lg z-10 min-w-48"
              style={{ backgroundColor: 'var(--bg-secondary)', border: '1px solid var(--border)' }}
            >
              <div className="text-sm font-medium mb-2" style={{ color: 'var(--text-primary)' }}>
                {roleInfo.icon} {roleInfo.label} Permissions:
              </div>
              <ul className="text-xs space-y-1" style={{ color: 'var(--text-secondary)' }}>
                {roleInfo.permissions.map((permission, index) => (
                  <li key={index} className="flex items-center space-x-1">
                    <span className="text-green-500">✓</span>
                    <span>{permission}</span>
                  </li>
                ))}
              </ul>
            </div>
          )}
        </div>
      )}

      {/* Visibility Badge */}
      {visibility && (
        <div className="relative">
          <div
            className="flex items-center space-x-1 px-2 py-1 rounded-full text-xs font-medium cursor-pointer"
            style={{ 
              backgroundColor: `${visibilityInfo.color}20`,
              color: visibilityInfo.color,
              border: `1px solid ${visibilityInfo.color}40`
            }}
            onMouseEnter={() => showTooltip && setShowDetails(true)}
            onMouseLeave={() => setShowDetails(false)}
          >
            <span>{visibilityInfo.icon}</span>
            <span>{visibilityInfo.label}</span>
          </div>

          {/* Visibility Tooltip */}
          {showDetails && showTooltip && (
            <div 
              className="absolute bottom-full right-0 mb-2 p-3 rounded-lg shadow-lg z-10 min-w-48"
              style={{ backgroundColor: 'var(--bg-secondary)', border: '1px solid var(--border)' }}
            >
              <div className="text-sm font-medium mb-1" style={{ color: 'var(--text-primary)' }}>
                {visibilityInfo.icon} {visibilityInfo.label}
              </div>
              <p className="text-xs" style={{ color: 'var(--text-secondary)' }}>
                {visibilityInfo.description}
              </p>
            </div>
          )}
        </div>
      )}
    </div>
  );
}

// Utility component for inline permission checks
export function CanEdit({ userRole, children }) {
  const canEdit = ['owner', 'editor'].includes(userRole);
  return canEdit ? children : null;
}

export function CanManage({ userRole, children }) {
  const canManage = userRole === 'owner';
  return canManage ? children : null;
}

export function PermissionGate({ userRole, requiredRole, children, fallback = null }) {
  const roleHierarchy = { viewer: 1, editor: 2, owner: 3 };
  const userLevel = roleHierarchy[userRole] || 0;
  const requiredLevel = roleHierarchy[requiredRole] || 0;
  
  return userLevel >= requiredLevel ? children : fallback;
}