// Package util ...
//
// Description : util ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2026-01-05 18:48
package util

import (
	"reflect"
	"strings"

	"git.zhangdeman.cn/zhangdeman/consts"
	utilPkg "git.zhangdeman.cn/zhangdeman/util"
)

// ParseValidateRule 解析验证规则
func ParseValidateRule(dataType reflect.Type, ruleStr string) ValidateRule {
	if dataType.Kind() == reflect.Ptr {
		dataType = dataType.Elem()
	}
	dataKind := dataType.Kind()
	rule := ValidateRule{
		Omitempty: false,
		Required:  false,
		Lte:       nil,
		Gte:       nil,
		Lt:        nil,
		Gt:        nil,
		Len:       nil,
		Max:       nil,
		Min:       nil,
		Eq:        nil,
		Ne:        nil,
		Oneof:     nil,
	}
	ruleList := strings.Split(ruleStr, ",")
	for _, itemRule := range ruleList {
		itemRule = strings.ToLower(strings.TrimSpace(itemRule))
		if len(itemRule) == 0 {
			continue
		}
		if strings.Contains(itemRule, "=") {
			// 一定是无需要值的验证规则
			switch itemRule {
			case consts.ValidatorRuleCommonRequired.String(): // 必传
				rule.Required = true
			case consts.ValidatorRuleCommonOmitempty.String(): // 为空则不校验
				rule.Omitempty = true
			}
			continue
		}
		itemRuleArr := strings.Split(itemRule, "=")
		ruleType := itemRuleArr[0]
		ruleValue := strings.Join(itemRuleArr[1:], "=")
		if len(ruleValue) == 0 {
			// 未配置值的校验规则
			continue
		}
		switch ruleType {
		case consts.ValidateRuleLte.String(), consts.ValidateRuleGte.String(), consts.ValidateRuleGt.String(), consts.ValidateRuleLt.String(): // 数字取值范围
			var val float64
			if err := utilPkg.ConvertAssign(&val, ruleValue); nil == err {
				switch ruleType {
				case consts.ValidateRuleLte.String():
					rule.Lte = &val
				case consts.ValidateRuleGte.String():
					rule.Gte = &val
				case consts.ValidateRuleGt.String():
					rule.Gt = &val
				case consts.ValidateRuleLt.String():
					rule.Lt = &val
				}
			}
		case consts.ValidatorRuleCommonLen.String(), consts.ValidatorRuleCommonMin.String(), consts.ValidatorRuleCommonMax.String(): // 长度取值范围
			var val uint
			if err := utilPkg.ConvertAssign(&val, ruleValue); nil == err {
				switch ruleType {
				case consts.ValidatorRuleCommonLen.String():
					rule.Len = &val
				case consts.ValidatorRuleCommonMin.String():
					rule.Min = &val
				case consts.ValidatorRuleCommonMax.String():
					rule.Max = &val
				}
			}
		case consts.ValidateRuleEq.String():
			rule.Eq = ruleValue
		case consts.ValidateRuleNe.String():
			rule.Ne = ruleValue
		case consts.ValidatorRuleCommonOneOf.String():
		}
	}
	return rule
}

type ValidateRule struct {
	Omitempty bool     `json:"omitempty" dc:"为空则不校验"`
	Required  bool     `json:"required" dc:"必传校验"`
	Lte       *float64 `json:"lte" dc:"数字类型小于等于"`
	Gte       *float64 `json:"gte" dc:"数字类型大于等于"`
	Lt        *float64 `json:"lt" dc:"数字类型小于"`
	Gt        *float64 `json:"gt" dc:"数字类型大于"`
	Len       *uint    `json:"len" dc:"长度等于"`
	Max       *uint    `json:"max" dc:"长度小于等于"`
	Min       *uint    `json:"min" dc:"长度大于等于"`
	Eq        any      `json:"eq" dc:"等于"`
	Ne        any      `json:"ne" dc:"不等于"`
	Oneof     []any    `json:"oneof" dc:"枚举值列表"`
}