package shell

type SubshellParameters struct{}

func (p *SubshellParameters) SubParsers() []Parser {
	return []Parser{
		&BaseParser{
			parameters: &StatementParameters{},
		},
	}
}

func (p *SubshellParameters) Supports(charsBefore []rune, r rune) bool {
	if r == '(' {
		return len(charsBefore) == 0 ||
			countBackslashSuffixes(charsBefore)%2 == 0
	}

	return false
}

func (p *SubshellParameters) ShouldLeave(charsBefore []rune, r rune) bool {
	if r == ')' {
		return len(charsBefore) == 0 ||
			countBackslashSuffixes(charsBefore)%2 == 0
	}

	return false
}

func (p *SubshellParameters) MakeToken() Token {
	return &Subshell{}
}

type Subshell struct {
	BaseToken
}

type Backtick struct {
	Subshell
}

type BacktickParameters struct {
	SubshellParameters
}

func (p *BacktickParameters) Supports(charsBefore []rune, r rune) bool {
	if r == '`' {
		return len(charsBefore) == 0 ||
			countBackslashSuffixes(charsBefore)%2 == 0
	}

	return false
}

func (p *BacktickParameters) ShouldLeave(charsBefore []rune, r rune) bool {
	if r == '`' {
		return len(charsBefore) == 0 ||
			countBackslashSuffixes(charsBefore)%2 == 0
	}

	return false
}