package services

import (
	"github.com/yidane/formula"
	"hongze/hongze_edb_lib/models"
	"strings"
)

// CheckFormula 检测计算公式是否异常
func CheckFormula(formula string) map[string]string {
	mathFormula := []string{"MAX", "MIN", "ABS", "ACOS", "ASIN", "CEIL", "MOD", "POW", "ROUND", "SIGN", "SIN", "TAN", "LOG10", "LOG2", "LOG"}

	str := strings.ToUpper(formula)
	for _, v := range mathFormula {
		str = strings.Replace(str, v, "", -1)
	}
	str = strings.Replace(str, "(", "", -1)
	str = strings.Replace(str, ")", "", -1)

	byteMap := make(map[string]string)
	for i := 0; i < len(str); i++ {
		byteInt := str[i]
		if byteInt >= 65 && byteInt <= 90 {
			byteStr := string(byteInt)
			if _, ok := byteMap[byteStr]; !ok {
				byteMap[byteStr] = byteStr
			}
		}
	}
	return byteMap
}

// CheckFormula2 校验公式是否正常（比如说除法的分母不能为0之类的，实际上就是用预设的字段数据做一次计算）
func CheckFormula2(edbInfoArr []*models.EdbInfo, formulaMap map[string]string, formulaStr string, edbInfoIdBytes []string) (ok bool, err error) {
	valArr := make(map[int]float64)
	for _, v := range edbInfoArr {
		valArr[v.EdbInfoId] = 100
	}
	formulaStr = strings.ToUpper(formulaStr)
	formulaFormStr := models.ReplaceFormula(edbInfoArr, valArr, formulaMap, formulaStr, edbInfoIdBytes)
	if formulaFormStr == "" {
		return
	}
	expression := formula.NewExpression(formulaFormStr)
	_, err = expression.Evaluate()
	if err != nil {
	} else {
		ok = true
	}
	return
}