package service

import "go/ast"

var (
	variableDeclarations []*Variable
)

type Variable struct {
	s *ast.ValueSpec
}

func NewVariable(s *ast.ValueSpec) *Variable {
	return &Variable{s: s}
}

func (c *Variable) String() (code string) {
	code += c.genString(c.s)
	return
}

func (c *Variable) genString(s *ast.ValueSpec) (code string) {
	if s.Type == nil {
		code += addTypeByValue(s)
	}

	code += handleValueSpecType(s.Type)
	code += " "

	_, ok := s.Type.(*ast.StarExpr)
	if ok {
		isPointerType = true
	}
	code += handleValueSpecNames(s.Names)
	isPointerType = false

	if s.Values != nil {
		code += " = "
		code += handleValueSpecValues(s.Values)
	}

	l, ok := s.Type.(*ast.ArrayType)
	if ok {
		code += "["
		if l.Len != nil {
			code += handleExpr(l.Len)
		}
		code += "]"
	}
	code += ";"
	return
}

func handleLocalVariable(s *ast.ValueSpec) (code string) {
	if s.Type == nil {
		code += addTypeByValue(s)
	}

	code += handleValueSpecType(s.Type)
	code += " "

	_, ok := s.Type.(*ast.StarExpr)
	if ok {
		isPointerType = true
	}
	code += handleValueSpecNames(s.Names)
	isPointerType = false

	if s.Values != nil {
		code += " = "
		code += handleValueSpecValues(s.Values)
	}

	l, ok := s.Type.(*ast.ArrayType)
	if ok {
		code += "["
		if l.Len != nil {
			code += handleExpr(l.Len)
		}
		code += "]"
	}
	code += ";"
	return code
}

func handleGlobalVariable(s *ast.ValueSpec) (code string) {
	addVariable(s)
	return
}
func addVariable(s *ast.ValueSpec) {
	c := NewVariable(s)
	variableDeclarations = append(variableDeclarations, c)
}