package tools

import (
	"context"
	"strings"
)

type Product struct {
	ID          string  `json:"id"`
	Name        string  `json:"name"`
	Price       float64 `json:"price"`
	Description string  `json:"description"`
}

type Tool interface {
	GetByID(ctx context.Context, id string) (*Product, error)
	SearchByName(ctx context.Context, name string) ([]*Product, error)
}

type memoryTool struct {
	items []*Product
}

func NewMemoryProductTool() Tool {
	return &memoryTool{items: []*Product{
		{ID: "P001", Name: "手机 A1", Price: 1999, Description: "入门级智能手机"},
		{ID: "P002", Name: "手机 Pro X", Price: 5999, Description: "旗舰级拍照手机"},
		{ID: "P003", Name: "笔记本 M3", Price: 8999, Description: "轻薄高性能笔记本"},
		{ID: "P004", Name: "耳机 Air", Price: 1299, Description: "降噪真无线耳机"},
	}}
}

func (m *memoryTool) GetByID(ctx context.Context, id string) (*Product, error) {
	for _, it := range m.items {
		if it.ID == id {
			return it, nil
		}
	}
	return nil, nil
}

func (m *memoryTool) SearchByName(ctx context.Context, name string) ([]*Product, error) {
	if name == "" {
		return nil, nil
	}
	q := strings.ToLower(name)
	var out []*Product
	for _, it := range m.items {
		if strings.Contains(strings.ToLower(it.Name), q) {
			out = append(out, it)
		}
	}
	return out, nil
}