/*
 * Copyright 2024 CloudWeGo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"context"
	"fmt"
	"log"
	"os"

	"github.com/cloudwego/eino-ext/components/model/openai"
	"github.com/cloudwego/eino-ext/components/tool/googlesearch"
	"github.com/cloudwego/eino/components/tool"
	"github.com/cloudwego/eino/components/tool/utils"
	"github.com/cloudwego/eino/compose"
	"github.com/cloudwego/eino/schema"
)

func main() {
	fmt.Println("Hello, World!")
	ctx := context.Background()

	updateTool, err := utils.InferTool("update_todo", "Update a todo item, eg: content,deadline...", UpdateTodoFunc)
	if err != nil {
		log.Fatal(err)
	}

	// 创建 Google Search 工具
	searchTool, err := googlesearch.NewGoogleSearchTool(ctx, &googlesearch.Config{
		APIKey:         os.Getenv("GOOGLE_API_KEY"),          // Google API Key
		SearchEngineID: os.Getenv("GOOGLE_SEARCH_ENGINE_ID"), // 自定义搜索引擎 ID
		Num:            5,                                    // 每次返回的结果数量
		Lang:           "zh-CN",                              // 搜索结果的语言
	})
	if err != nil {
		log.Fatal(err)
	}

	// 初始化 tools
	todoTools := []tool.BaseTool{
		getAddTodoTool(), // 使用 NewTool 方式
		updateTool,       // 使用 InferTool 方式
		&ListTodoTool{},  // 使用结构体实现方式, 此处未实现底层逻辑
		searchTool,
	}

	// 创建并配置 ChatModel
	temp := float32(0.7)
	chatModel, err := openai.NewChatModel(context.Background(), &openai.ChatModelConfig{
		Model:       "gpt-4",
		APIKey:      os.Getenv("OPENAI_API_KEY"),
		Temperature: &temp,
	})
	if err != nil {
		log.Fatal(err)
	}

	// 获取工具信息, 用于绑定到 ChatModel
	toolInfos := make([]*schema.ToolInfo, 0, len(todoTools))
	for _, tool := range todoTools {
		info, err := tool.Info(ctx)
		if err != nil {
			log.Fatal(err)
		}
		toolInfos = append(toolInfos, info)
	}

	// 将 tools 绑定到 ChatModel
	err = chatModel.BindTools(toolInfos)
	if err != nil {
		log.Fatal(err)
	}

	// 创建 tools 节点
	todoToolsNode, err := compose.NewToolNode(context.Background(), &compose.ToolsNodeConfig{
		Tools: todoTools,
	})
	if err != nil {
		log.Fatal(err)
	}

	// 构建完整的处理链
	chain := compose.NewChain[*schema.Message, []*schema.Message]()
	chain.
		AppendChatModel(chatModel, compose.WithNodeName("chat_model")).
		AppendToolsNode(todoToolsNode, compose.WithNodeName("tools"))

	// 编译并运行 chain
	agent, err := chain.Compile(ctx)
	if err != nil {
		log.Fatal(err)
	}

	// 运行示例
	resp, err := agent.Invoke(ctx, &schema.Message{
		Content: "帮我创建一个明天下午3点截止的待办事项：准备Eino项目演示文稿",
	})
	if err != nil {
		log.Fatal(err)
	}

	// 输出结果
	for _, msg := range resp {
		fmt.Println(msg.Content)
	}
}

// 获取添加 todo 工具
// 使用 utils.NewTool 创建工具
func getAddTodoTool() tool.InvokableTool {
	info := &schema.ToolInfo{
		Name: "add_todo",
		Desc: "Add a todo item",
		ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
			"content": {
				Desc:     "The content of the todo item",
				Type:     schema.String,
				Required: true,
			},
			"started_at": {
				Desc: "The started time of the todo item, in unix timestamp",
				Type: schema.Integer,
			},
			"deadline": {
				Desc: "The deadline of the todo item, in unix timestamp",
				Type: schema.Integer,
			},
		}),
	}

	return utils.NewTool(info, AddTodoFunc)
}

// 获取列出 todo 工具
// 自行实现 InvokableTool 接口
type ListTodoTool struct{}

func (lt *ListTodoTool) Info(ctx context.Context) (*schema.ToolInfo, error) {
	return &schema.ToolInfo{
		Name: "list_todo",
		Desc: "List all todo items",
		ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
			"finished": {
				Desc:     "filter todo items if finished",
				Type:     schema.Boolean,
				Required: false,
			},
		}),
	}, nil
}

type TodoListParams struct {
	Finished *bool `json:"finished"`
}

type TodoUpdateParams struct {
	ID        string  `json:"id" jsonschema:"description=id of the todo"`
	Content   *string `json:"content,omitempty" jsonschema:"description=content of the todo"`
	StartedAt *int64  `json:"started_at,omitempty" jsonschema:"description=start time in unix timestamp"`
	Deadline  *int64  `json:"deadline,omitempty" jsonschema:"description=deadline of the todo in unix timestamp"`
	Done      *bool   `json:"done,omitempty" jsonschema:"description=done status"`
}

type TodoAddParams struct {
	Content   string `json:"content"`
	StartedAt *int64 `json:"started_at,omitempty"` // 开始时间
	Deadline  *int64 `json:"deadline,omitempty"`
}

func (lt *ListTodoTool) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
	log.Printf("invoke tool list_todo: %s", argumentsInJSON)
	// 具体的调用逻辑
	return `{"todos": [{"id": "1", "content": "在2024年12月10日之前完成Eino项目演示文稿的准备工作", "started_at": 1717401600, "deadline": 1717488000, "done": false}]}`, nil
}

func AddTodoFunc(ctx context.Context, params *TodoAddParams) (string, error) {
	log.Printf("invoke tool add_todo: %+v", params)
	// 具体的调用逻辑
	return `{"msg": "success"}`, nil
}

func UpdateTodoFunc(ctx context.Context, params *TodoUpdateParams) (string, error) {
	log.Printf("invoke tool update_todo: %+v", params)
	// 具体的调用逻辑
	return `{"msg": "success"}`, nil
}