package config

import (
	"sync"
)

// ProbeMapping 探测器映射管理器
type ProbeMapping struct {
	mu          sync.RWMutex
	defaultMap  []string
	portMap     map[int][]string
	initialized bool
}

// NewProbeMapping 创建探测器映射管理器
func NewProbeMapping() *ProbeMapping {
	return &ProbeMapping{
		defaultMap:  getDefaultProbeMap(),
		portMap:     getDefaultPortMap(),
		initialized: true,
	}
}

// getDefaultProbeMap 获取默认的探测器顺序
func getDefaultProbeMap() []string {
	// 返回常量的副本
	result := make([]string, len(DefaultProbeMap))
	copy(result, DefaultProbeMap)
	return result
}

// getDefaultPortMap 获取默认的端口映射
func getDefaultPortMap() map[int][]string {
	// 返回常量的深拷贝
	result := make(map[int][]string)
	for port, probes := range DefaultPortMap {
		probesCopy := make([]string, len(probes))
		copy(probesCopy, probes)
		result[port] = probesCopy
	}
	return result
}

// GetDefaultProbes 获取默认探测器列表
func (pm *ProbeMapping) GetDefaultProbes() []string {
	pm.mu.RLock()
	defer pm.mu.RUnlock()

	result := make([]string, len(pm.defaultMap))
	copy(result, pm.defaultMap)
	return result
}

// GetAllPortMappings 获取所有端口映射
func (pm *ProbeMapping) GetAllPortMappings() map[int][]string {
	pm.mu.RLock()
	defer pm.mu.RUnlock()

	result := make(map[int][]string)
	for port, probes := range pm.portMap {
		probesCopy := make([]string, len(probes))
		copy(probesCopy, probes)
		result[port] = probesCopy
	}
	return result
}


// 全局探测器映射实例
var (
	globalProbeMapping *ProbeMapping
	probeMappingOnce   sync.Once
)

// GetGlobalProbeMapping 获取全局探测器映射实例
func GetGlobalProbeMapping() *ProbeMapping {
	probeMappingOnce.Do(func() {
		globalProbeMapping = NewProbeMapping()
	})
	return globalProbeMapping
}