package enums

// CertificationStatus 认证状态枚举
type CertificationStatus string

const (
	// === 主流程状态 ===
	StatusPending            CertificationStatus = "pending"              // 待认证
	StatusInfoSubmitted      CertificationStatus = "info_submitted"       // 已提交企业信息
	StatusEnterpriseVerified CertificationStatus = "enterprise_verified"  // 已企业认证
	StatusContractApplied    CertificationStatus = "contract_applied"     // 已申请签署合同
	StatusContractSigned     CertificationStatus = "contract_signed"      // 已签署合同
	StatusCompleted          CertificationStatus = "completed"            // 认证完成

	// === 失败状态 ===
	StatusInfoRejected     CertificationStatus = "info_rejected"     // 企业信息被拒绝
	StatusContractRejected CertificationStatus = "contract_rejected" // 合同被拒签
	StatusContractExpired  CertificationStatus = "contract_expired"  // 合同签署超时
)

// AllStatuses 所有有效状态列表
var AllStatuses = []CertificationStatus{
	StatusPending,
	StatusInfoSubmitted,
	StatusEnterpriseVerified,
	StatusContractApplied,
	StatusContractSigned,
	StatusCompleted,
	StatusInfoRejected,
	StatusContractRejected,
	StatusContractExpired,
}

// MainFlowStatuses 主流程状态列表
var MainFlowStatuses = []CertificationStatus{
	StatusPending,
	StatusInfoSubmitted,
	StatusEnterpriseVerified,
	StatusContractApplied,
	StatusContractSigned,
}

// FailureStatuses 失败状态列表
var FailureStatuses = []CertificationStatus{
	StatusInfoRejected,
	StatusContractRejected,
	StatusContractExpired,
}

// IsValidStatus 检查状态是否有效
func IsValidStatus(status CertificationStatus) bool {
	for _, validStatus := range AllStatuses {
		if status == validStatus {
			return true
		}
	}
	return false
}

// GetStatusName 获取状态的中文名称
func GetStatusName(status CertificationStatus) string {
	statusNames := map[CertificationStatus]string{
		StatusPending:            "待认证",
		StatusInfoSubmitted:      "已提交企业信息",
		StatusEnterpriseVerified: "已企业认证",
		StatusContractApplied:    "已申请签署合同",
		StatusContractSigned:     "已签署合同",
		StatusCompleted:          "认证完成",
		StatusInfoRejected:       "企业信息被拒绝",
		StatusContractRejected:   "合同被拒签",
		StatusContractExpired:    "合同签署超时",
	}

	if name, exists := statusNames[status]; exists {
		return name
	}
	return string(status)
}

// IsFinalStatus 判断是否为最终状态
func IsFinalStatus(status CertificationStatus) bool {
	return status == StatusCompleted
}

// IsFailureStatus 判断是否为失败状态
func IsFailureStatus(status CertificationStatus) bool {
	for _, failureStatus := range FailureStatuses {
		if status == failureStatus {
			return true
		}
	}
	return false
}

// IsMainFlowStatus 判断是否为主流程状态
func IsMainFlowStatus(status CertificationStatus) bool {
	for _, mainStatus := range MainFlowStatuses {
		if status == mainStatus {
			return true
		}
	}
	return false
}

// GetStatusCategory 获取状态分类
func GetStatusCategory(status CertificationStatus) string {
	if IsMainFlowStatus(status) {
		return "主流程"
	}
	if IsFailureStatus(status) {
		return "失败状态"
	}
	if status == StatusCompleted {
		return "完成"
	}
	return "未知"
}

// GetStatusPriority 获取状态优先级（用于排序）
func GetStatusPriority(status CertificationStatus) int {
	priorities := map[CertificationStatus]int{
		StatusPending:            1,
		StatusInfoSubmitted:      2,
		StatusEnterpriseVerified: 3,
		StatusContractApplied:    4,
		StatusContractSigned:     5,
		StatusCompleted:          6,
		StatusInfoRejected:       7,
		StatusContractRejected:   8,
		StatusContractExpired:    9,
	}

	if priority, exists := priorities[status]; exists {
		return priority
	}
	return 999
}

// GetProgressPercentage 获取进度百分比
func GetProgressPercentage(status CertificationStatus) int {
	progressMap := map[CertificationStatus]int{
		StatusPending:            0,
		StatusInfoSubmitted:      25,
		StatusEnterpriseVerified: 50,
		StatusContractApplied:    75,
		StatusContractSigned:     100,
		StatusCompleted:          100,
		StatusInfoRejected:       25,
		StatusContractRejected:   75,
		StatusContractExpired:    75,
	}

	if progress, exists := progressMap[status]; exists {
		return progress
	}
	return 0
}

// IsUserActionRequired 检查是否需要用户操作
func IsUserActionRequired(status CertificationStatus) bool {
	userActionRequired := map[CertificationStatus]bool{
		StatusPending:            true,  // 需要提交企业信息
		StatusInfoSubmitted:      false, // 等待系统验证
		StatusEnterpriseVerified: true,  // 需要申请合同
		StatusContractApplied:    true,  // 需要签署合同
		StatusContractSigned:     false, // 合同已签署，等待系统处理
		StatusCompleted:          false, // 已完成
		StatusInfoRejected:       true,  // 需要重新提交
		StatusContractRejected:   true,  // 需要重新申请
		StatusContractExpired:    true,  // 需要重新申请
	}

	if required, exists := userActionRequired[status]; exists {
		return required
	}
	return false
}

// GetUserActionHint 获取用户操作提示
func GetUserActionHint(status CertificationStatus) string {
	hints := map[CertificationStatus]string{
		StatusPending:            "请提交企业信息",
		StatusInfoSubmitted:      "请完成企业认证",
		StatusEnterpriseVerified: "企业认证完成，请申请签署合同",
		StatusContractApplied:    "请在规定时间内完成合同签署",
		StatusContractSigned:     "合同已签署，等待系统处理",
		StatusCompleted:          "认证已完成",
		StatusInfoRejected:       "企业信息验证失败，请修正后重新提交",
		StatusContractRejected:   "合同签署被拒绝，可重新申请",
		StatusContractExpired:    "合同签署已超时，请重新申请",
	}

	if hint, exists := hints[status]; exists {
		return hint
	}
	return ""
}

// GetNextValidStatuses 获取当前状态的下一个有效状态列表
func GetNextValidStatuses(currentStatus CertificationStatus) []CertificationStatus {
	nextStatusMap := map[CertificationStatus][]CertificationStatus{
		StatusPending: {
			StatusInfoSubmitted,
		},
		StatusInfoSubmitted: {
			StatusEnterpriseVerified,
			StatusInfoRejected,
		},
		StatusEnterpriseVerified: {
			StatusContractApplied,
		},
		StatusContractApplied: {
			StatusContractSigned,
			StatusContractRejected,
			StatusContractExpired,
		},
		StatusContractSigned: {
			StatusCompleted, // 可以转换到完成状态
		},
		StatusCompleted: {
			// 最终状态，无后续状态
		},
		StatusInfoRejected: {
			StatusInfoSubmitted, // 可以重新提交
		},
		StatusContractRejected: {
			StatusEnterpriseVerified, // 重置到企业认证状态
		},
		StatusContractExpired: {
			StatusEnterpriseVerified, // 重置到企业认证状态
		},
	}

	if nextStatuses, exists := nextStatusMap[currentStatus]; exists {
		return nextStatuses
	}
	return []CertificationStatus{}
}

// CanTransitionTo 检查是否可以从当前状态转换到目标状态
func CanTransitionTo(currentStatus, targetStatus CertificationStatus) bool {
	validNextStatuses := GetNextValidStatuses(currentStatus)
	for _, validStatus := range validNextStatuses {
		if validStatus == targetStatus {
			return true
		}
	}
	return false
}

// GetTransitionReason 获取状态转换的原因描述
func GetTransitionReason(from, to CertificationStatus) string {
	transitionReasons := map[string]string{
		string(StatusPending) + "->" + string(StatusInfoSubmitted):         "用户提交企业信息",
		string(StatusInfoSubmitted) + "->" + string(StatusEnterpriseVerified): "e签宝企业认证成功",
		string(StatusInfoSubmitted) + "->" + string(StatusInfoRejected):       "e签宝企业认证失败",
		string(StatusEnterpriseVerified) + "->" + string(StatusContractApplied): "用户申请签署合同",
		string(StatusContractApplied) + "->" + string(StatusContractSigned):    "e签宝合同签署成功",
		string(StatusContractSigned) + "->" + string(StatusCompleted):         "系统处理完成，认证成功",
		string(StatusContractApplied) + "->" + string(StatusContractRejected):  "用户拒绝签署合同",
		string(StatusContractApplied) + "->" + string(StatusContractExpired):   "合同签署超时",
		string(StatusInfoRejected) + "->" + string(StatusInfoSubmitted):        "用户重新提交企业信息",
		string(StatusContractRejected) + "->" + string(StatusEnterpriseVerified): "重置状态，准备重新申请",
		string(StatusContractExpired) + "->" + string(StatusEnterpriseVerified):  "重置状态，准备重新申请",
	}

	key := string(from) + "->" + string(to)
	if reason, exists := transitionReasons[key]; exists {
		return reason
	}
	return "未知转换"
}