'use client';

import { useState } from 'react';
import { Plus, X, Sparkles, Loader2 } from 'lucide-react';
import { AgentList } from '@/components/agents/AgentList';
import { Button } from '@/components/ui/Button';
import { Input } from '@/components/ui/Input';
import { Textarea } from '@/components/ui/Textarea';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/Card';
import type { Dictionary } from '@/get-dictionary';

interface AgentsPageClientProps {
  locale: string;
  isPremium: boolean;
  dict: Dictionary;
}

export function AgentsPageClient({ locale, isPremium, dict }: AgentsPageClientProps) {
  const [showCreateModal, setShowCreateModal] = useState(false);
  const [creating, setCreating] = useState(false);
  const [formData, setFormData] = useState({
    name: '',
    personality: '',
    background: '',
  });
  const [error, setError] = useState<string | null>(null);

  const handleCreateAgent = async () => {
    if (!formData.name.trim()) {
      setError('请输入智能体名称');
      return;
    }

    setCreating(true);
    setError(null);

    try {
      const response = await fetch('/api/agents', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          name: formData.name,
          background: formData.background,
          personality: {
            traits: formData.personality.split(',').map((t) => t.trim()).filter(Boolean),
            tone: 'warm',
          },
        }),
      });

      if (!response.ok) {
        const data = await response.json();
        throw new Error(data.error || '创建失败');
      }

      // Close modal and refresh
      setShowCreateModal(false);
      setFormData({ name: '', personality: '', background: '' });
      // The AgentList will auto-refresh
    } catch (err) {
      setError(err instanceof Error ? err.message : '创建失败');
    } finally {
      setCreating(false);
    }
  };

  return (
    <>
      <AgentList
        locale={locale}
        isPremium={isPremium}
        onCreateAgent={() => setShowCreateModal(true)}
      />

      {/* Create Modal */}
      {showCreateModal && (
        <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
          <div className="bg-white rounded-2xl w-full max-w-lg max-h-[90vh] overflow-y-auto">
            {/* Modal header */}
            <div className="flex items-center justify-between p-6 border-b border-gray-100">
              <div className="flex items-center gap-3">
                <div className="w-10 h-10 rounded-full bg-gradient-to-r from-purple-500 to-pink-500 flex items-center justify-center">
                  <Sparkles className="w-5 h-5 text-white" />
                </div>
                <div>
                  <h3 className="text-lg font-semibold text-gray-900">
                    创建自定义智能体
                  </h3>
                  <p className="text-sm text-gray-500">
                    为你的新智能体起个名字吧
                  </p>
                </div>
              </div>
              <button
                onClick={() => setShowCreateModal(false)}
                className="p-2 hover:bg-gray-100 rounded-lg transition-colors"
              >
                <X className="w-5 h-5 text-gray-400" />
              </button>
            </div>

            {/* Modal body */}
            <div className="p-6 space-y-4">
              {/* Name input */}
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  智能体名称 <span className="text-red-500">*</span>
                </label>
                <Input
                  value={formData.name}
                  onChange={(e) => setFormData({ ...formData, name: e.target.value })}
                  placeholder="例如：十年后的自己"
                  maxLength={50}
                />
              </div>

              {/* Background textarea */}
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  背景故事
                </label>
                <Textarea
                  value={formData.background}
                  onChange={(e) => setFormData({ ...formData, background: e.target.value })}
                  placeholder="描述这个智能体的背景故事..."
                  rows={3}
                  maxLength={500}
                />
              </div>

              {/* Personality input */}
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">
                  性格特点
                </label>
                <Input
                  value={formData.personality}
                  onChange={(e) => setFormData({ ...formData, personality: e.target.value })}
                  placeholder="例如：温柔、乐观、善解人意（用逗号分隔）"
                  maxLength={100}
                />
                <p className="text-xs text-gray-400 mt-1">
                  多个特点请用逗号分隔
                </p>
              </div>

              {/* Error message */}
              {error && (
                <div className="bg-red-50 border border-red-200 rounded-lg p-3 text-sm text-red-600">
                  {error}
                </div>
              )}

              {/* Premium notice */}
              {!isPremium && (
                <div className="bg-amber-50 border border-amber-200 rounded-lg p-4">
                  <p className="text-sm text-amber-800">
                    <strong>注意：</strong>
                    免费用户最多只能拥有 1 个自定义智能体。
                    升级到高级版可创建最多 3 个智能体。
                  </p>
                </div>
              )}
            </div>

            {/* Modal footer */}
            <div className="flex items-center justify-end gap-3 p-6 border-t border-gray-100">
              <Button
                variant="outline"
                onClick={() => setShowCreateModal(false)}
                disabled={creating}
              >
                取消
              </Button>
              <Button
                variant="primary"
                onClick={handleCreateAgent}
                isLoading={creating}
                disabled={!formData.name.trim() || creating}
              >
                {creating ? '创建中...' : '创建智能体'}
              </Button>
            </div>
          </div>
        </div>
      )}
    </>
  );
}