'use client';

import React, { useState, useCallback } from 'react';
import { GripVertical, Trash2, ChevronDown, ChevronRight } from 'lucide-react';

import type { SchemaProperty } from '@mcpengine/ai-pipeline/types';

interface ParamEditorProps {
  name: string;
  property: SchemaProperty;
  required: boolean;
  onUpdate: (updates: Partial<SchemaProperty>) => void;
  onToggleRequired: () => void;
  onDelete: () => void;
}

const TYPE_OPTIONS = ['string', 'number', 'boolean', 'array', 'object'] as const;

export function ParamEditor({
  name,
  property,
  required,
  onUpdate,
  onToggleRequired,
  onDelete,
}: ParamEditorProps) {
  const [expanded, setExpanded] = useState(false);

  const toggleExpand = useCallback(() => setExpanded((prev) => !prev), []);

  return (
    <div className="bg-gray-800/60 border border-gray-700 rounded-lg overflow-hidden">
      {/* Collapsed header row */}
      <div className="flex items-center gap-2 px-2 py-2">
        {/* Drag handle */}
        <GripVertical className="w-3.5 h-3.5 text-gray-600 cursor-grab shrink-0" />

        {/* Expand toggle */}
        <button onClick={toggleExpand} className="shrink-0 text-gray-500 hover:text-gray-300">
          {expanded ? (
            <ChevronDown className="w-3.5 h-3.5" />
          ) : (
            <ChevronRight className="w-3.5 h-3.5" />
          )}
        </button>

        {/* Name */}
        <span className="text-sm text-gray-200 font-mono flex-1 truncate">{name}</span>

        {/* Type badge */}
        <span className="text-[10px] bg-gray-700 text-gray-400 px-1.5 py-0.5 rounded shrink-0">
          {property.type}
        </span>

        {/* Required badge */}
        {required && (
          <span className="text-[10px] bg-amber-500/20 text-amber-400 px-1.5 py-0.5 rounded shrink-0">
            req
          </span>
        )}

        {/* Delete */}
        <button
          onClick={onDelete}
          className="shrink-0 p-1 text-gray-600 hover:text-red-400 transition-colors"
        >
          <Trash2 className="w-3 h-3" />
        </button>
      </div>

      {/* Expanded fields */}
      {expanded && (
        <div className="px-3 pb-3 pt-1 space-y-2.5 border-t border-gray-700/50">
          {/* Name input */}
          <div>
            <label className="block text-[10px] text-gray-500 mb-1">Name</label>
            <input
              type="text"
              value={name}
              readOnly
              className="w-full bg-gray-800 border border-gray-700 rounded px-2 py-1.5 text-xs text-gray-300 font-mono outline-none"
            />
          </div>

          {/* Type select */}
          <div>
            <label className="block text-[10px] text-gray-500 mb-1">Type</label>
            <select
              value={property.type}
              onChange={(e) => onUpdate({ type: e.target.value })}
              className="w-full bg-gray-800 border border-gray-700 rounded px-2 py-1.5 text-xs text-gray-300 outline-none"
            >
              {TYPE_OPTIONS.map((t) => (
                <option key={t} value={t}>
                  {t}
                </option>
              ))}
            </select>
          </div>

          {/* Required toggle */}
          <div className="flex items-center justify-between">
            <label className="text-[10px] text-gray-500">Required</label>
            <button
              onClick={onToggleRequired}
              className={`
                relative w-8 h-4.5 rounded-full transition-colors duration-200
                ${required ? 'bg-amber-500' : 'bg-gray-600'}
              `}
            >
              <span
                className={`
                  absolute top-0.5 left-0.5 w-3.5 h-3.5 bg-white rounded-full
                  transition-transform duration-200
                  ${required ? 'translate-x-3.5' : 'translate-x-0'}
                `}
              />
            </button>
          </div>

          {/* Description */}
          <div>
            <label className="block text-[10px] text-gray-500 mb-1">Description</label>
            <input
              type="text"
              value={property.description}
              onChange={(e) => onUpdate({ description: e.target.value })}
              placeholder="Describe this parameter..."
              className="w-full bg-gray-800 border border-gray-700 rounded px-2 py-1.5 text-xs text-gray-300 outline-none focus:border-indigo-500 transition-colors"
            />
          </div>

          {/* Default value */}
          <div>
            <label className="block text-[10px] text-gray-500 mb-1">Default Value</label>
            <input
              type="text"
              value={property.default != null ? String(property.default) : ''}
              onChange={(e) =>
                onUpdate({
                  default: e.target.value === '' ? undefined : e.target.value,
                })
              }
              placeholder="Optional default..."
              className="w-full bg-gray-800 border border-gray-700 rounded px-2 py-1.5 text-xs text-gray-300 outline-none focus:border-indigo-500 transition-colors"
            />
          </div>
        </div>
      )}
    </div>
  );
}