package models

import (
	"strings"
)

// botPatterns 包含常见的 bot/爬虫/蜘蛛 User-Agent 特征模式。
var botPatterns = []string{
	"bot", "crawler", "spider", "scraper", "scraping",
	"googlebot", "bingbot", "baiduspider", "yandexbot",
	"duckduckbot", "slurp", "teoma", "ia_archiver",
	"facebookexternalhit", "facebot", "twitterbot",
	"whatsapp", "telegram", "slackbot", "discordbot",
	"linkedinbot", "pinterestbot", "tumblr",
	"semrushbot", "ahrefsbot", "mj12bot", "dotbot",
	"archive.org_bot", "serpstatbot", "dataforseo",
	"petalbot", "gptbot", "claudebot", "anthropic-ai",
	"bytespider", "applebot", "seznambot",
	"headless", "phantom", "selenium", "puppeteer",
}

// IsBot 检查给定的 User-Agent 字符串是否匹配已知的 bot 特征模式。
// 它针对常见的 bot 标识进行不区分大小写的子串匹配。
func IsBot(userAgent string) bool {
	if userAgent == "" {
		return false
	}

	ua := strings.ToLower(userAgent)

	for _, pattern := range botPatterns {
		if strings.Contains(ua, pattern) {
			return true
		}
	}

	return false
}