import React, { useState, useEffect } from 'react';
import { Modal, Form, Input, Tabs, Card, Button, Space, message } from 'antd';
import { SaveOutlined, ReloadOutlined } from '@ant-design/icons';
import type { FlowNode, FlowNodeData } from '../types';

interface NodeConfigModalProps {
    visible: boolean;
    node: FlowNode | null;
    onCancel: () => void;
    onOk: (nodeId: string, updatedData: Partial<FlowNodeData>) => void;
}

const { TextArea } = Input;

const NodeConfigModal: React.FC<NodeConfigModalProps> = ({
    visible,
    node,
    onCancel,
    onOk
}) => {
    const [form] = Form.useForm();
    const [loading, setLoading] = useState(false);
    const [activeTab, setActiveTab] = useState('basic');

    // 重置表单数据
    useEffect(() => {
        if (visible && node) {
            form.setFieldsValue({
                label: node.data.label,
                description: node.data.nodeDefinition?.description || '',
                // 基础配置
                timeout: node.data.configs?.timeout || 3600,
                retryCount: node.data.configs?.retryCount || 0,
                priority: node.data.configs?.priority || 'normal',
                // 输入映射
                inputMapping: JSON.stringify(node.data.inputMapping || {}, null, 2),
                // 输出映射
                outputMapping: JSON.stringify(node.data.outputMapping || {}, null, 2),
            });
        } else {
            form.resetFields();
        }
    }, [visible, node, form]);

    const handleSubmit = async () => {
        if (!node) return;

        try {
            const values = await form.validateFields();
            setLoading(true);

            // 解析JSON字符串
            let inputMapping = {};
            let outputMapping = {};

            try {
                inputMapping = values.inputMapping ? JSON.parse(values.inputMapping) : {};
            } catch (error) {
                message.error('输入映射JSON格式错误');
                return;
            }

            try {
                outputMapping = values.outputMapping ? JSON.parse(values.outputMapping) : {};
            } catch (error) {
                message.error('输出映射JSON格式错误');
                return;
            }

            const updatedData: Partial<FlowNodeData> = {
                label: values.label,
                configs: {
                    ...node.data.configs,
                    timeout: values.timeout,
                    retryCount: values.retryCount,
                    priority: values.priority,
                },
                inputMapping,
                outputMapping,
            };

            onOk(node.id, updatedData);
            message.success('节点配置保存成功');
            onCancel();
        } catch (error) {
            console.error('保存节点配置失败:', error);
        } finally {
            setLoading(false);
        }
    };

    const handleReset = () => {
        form.resetFields();
        if (node) {
            form.setFieldsValue({
                label: node.data.label,
                description: node.data.nodeDefinition?.description || '',
                timeout: 3600,
                retryCount: 0,
                priority: 'normal',
                inputMapping: '{}',
                outputMapping: '{}',
            });
        }
    };

    const renderBasicConfig = () => (
        <Card size="small" title="基本信息">
            <Form.Item
                label="节点名称"
                name="label"
                rules={[{ required: true, message: '请输入节点名称' }]}
            >
                <Input placeholder="请输入节点名称" />
            </Form.Item>

            <Form.Item label="节点描述" name="description">
                <TextArea 
                    placeholder="请输入节点描述"
                    rows={3}
                    maxLength={500}
                    showCount
                />
            </Form.Item>

            <Form.Item
                label="超时时间(秒)"
                name="timeout"
                rules={[{ required: true, message: '请输入超时时间' }]}
            >
                <Input type="number" min={1} placeholder="3600" />
            </Form.Item>

            <Form.Item
                label="重试次数"
                name="retryCount"
            >
                <Input type="number" min={0} max={10} placeholder="0" />
            </Form.Item>

            <Form.Item
                label="优先级"
                name="priority"
            >
                <Input placeholder="normal" />
            </Form.Item>
        </Card>
    );

    const renderInputMapping = () => (
        <Card size="small" title="输入参数映射">
            <Form.Item
                label="输入映射配置"
                name="inputMapping"
                extra="请输入有效的JSON格式，用于配置节点的输入参数映射"
            >
                <TextArea
                    placeholder={`示例：
{
  "param1": "\${workflow.variable1}",
  "param2": "固定值",
  "param3": "\${previous.output.result}"
}`}
                    rows={12}
                    style={{ fontFamily: 'Monaco, Consolas, monospace' }}
                />
            </Form.Item>
        </Card>
    );

    const renderOutputMapping = () => (
        <Card size="small" title="输出参数映射">
            <Form.Item
                label="输出映射配置"
                name="outputMapping"
                extra="请输入有效的JSON格式，用于配置节点的输出参数映射"
            >
                <TextArea
                    placeholder={`示例：
{
  "result": "\${task.output.result}",
  "status": "\${task.status}",
  "message": "\${task.output.message}"
}`}
                    rows={12}
                    style={{ fontFamily: 'Monaco, Consolas, monospace' }}
                />
            </Form.Item>
        </Card>
    );

    return (
        <Modal
            title={`配置节点: ${node?.data?.label || '未知节点'}`}
            open={visible}
            onCancel={onCancel}
            width={800}
            style={{ top: 20 }}
            footer={
                <Space>
                    <Button onClick={onCancel}>取消</Button>
                    <Button 
                        icon={<ReloadOutlined />} 
                        onClick={handleReset}
                    >
                        重置
                    </Button>
                    <Button 
                        type="primary" 
                        loading={loading}
                        icon={<SaveOutlined />}
                        onClick={handleSubmit}
                    >
                        保存配置
                    </Button>
                </Space>
            }
        >
            <Form
                form={form}
                layout="vertical"
                initialValues={{
                    timeout: 3600,
                    retryCount: 0,
                    priority: 'normal',
                    inputMapping: '{}',
                    outputMapping: '{}'
                }}
            >
                <Tabs 
                    activeKey={activeTab} 
                    onChange={setActiveTab}
                    items={[
                        {
                            key: 'basic',
                            label: '基本配置',
                            children: renderBasicConfig()
                        },
                        {
                            key: 'input',
                            label: '输入映射',
                            children: renderInputMapping()
                        },
                        {
                            key: 'output',
                            label: '输出映射',
                            children: renderOutputMapping()
                        }
                    ]}
                />
            </Form>
        </Modal>
    );
};

export default NodeConfigModal;