class Byebug::ConditionCommand

def self.description
  <<-DESCRIPTION
    cond[ition] <n>[ expr]
    #{short_description}
    Specify breakpoint number <n> to break only if <expr> is true. <n> is
    an integer and <expr> is an expression to be evaluated whenever
    breakpoint <n> is reached. If no expression is specified, the condition
    is removed.
  DESCRIPTION
end

def self.regexp
  /^\s* cond(?:ition)? (?:\s+(\d+)(?:\s+(.*))?)? \s*$/x
end

def self.short_description
  "Sets conditions on breakpoints"
end

def execute
  return puts(help) unless @match[1]
  breakpoints = Byebug.breakpoints.sort_by(&:id)
  return errmsg(pr("condition.errors.no_breakpoints")) if breakpoints.empty?
  pos, err = get_int(@match[1], "Condition", 1)
  return errmsg(err) if err
  breakpoint = breakpoints.find { |b| b.id == pos }
  return errmsg(pr("break.errors.no_breakpoint")) unless breakpoint
  return errmsg(pr("break.errors.not_changed", expr: @match[2])) unless syntax_valid?(@match[2])
  breakpoint.expr = @match[2]
end