package main

import (
	"regexp"
	"strings"
)

var fieldMap map[string]ValueType

func init() {
	fieldMap["bool"] = VT_BOOL

	fieldMap["int"] = VT_INT
	fieldMap["int16"] = VT_INT16
	fieldMap["int32"] = VT_INT32
	fieldMap["int64"] = VT_INT64

	fieldMap["uint"] = VT_UINT
	fieldMap["uint16"] = VT_UINT16
	fieldMap["uint32"] = VT_UINT32
	fieldMap["uint64"] = VT_UINT64

	fieldMap["char"] = VT_CHAR
	fieldMap["varchar"] = VT_VARCHAR
	fieldMap["text"] = VT_TEXT

	fieldMap["timestamp"] = VT_TIMESTAMP
	fieldMap["date"] = VT_DATE
}

// ValueType 值 类型
type ValueType int

const (
	// VT_BOOL 布尔类型
	VT_BOOL ValueType = 00000 + iota
)

const (
	VT_INT ValueType = 10000 + iota
	VT_INT8
	VT_INT16
	VT_INT32
	VT_INT64
)

const (
	VT_UINT ValueType = 11000 + iota
	VT_UINT8
	VT_UINT16
	VT_UINT32
	VT_UINT64
)

const (
	VT_CHAR ValueType = 12000 + iota
	VT_VARCHAR
	VT_TEXT
)

const (
	VT_TIMESTAMP ValueType = 13000 + iota
	VT_DATE
)

// Field 字段
type Field struct {
	Key []byte

	VT ValueType

	ID uint16

	ArrayNumber int
	IsIndex     bool
	IsUnique    bool
}

// Parse 从字符串中解析 var a int; a = 0; a < 0 && a > 5 ;
func (field *Field) Parse(code string) {
	codes := strings.Split(code, ";")
	re := regexp.MustCompile("var +([a-zA-Z_]+) +[a-zA-Z]+[8|16|32|64]{0,1}")
	re.FindStringSubmatch(codes[0])
}