class Byebug::BreakCommand

def check_errors(file, line)
  path = File.expand_path(file)
  deco_path = normalize(file)
  fail(pr('break.errors.source', file: deco_path)) unless File.exist?(path)
  if line > n_lines(file)
    fail(pr('break.errors.far_line', lines: n_lines(file), file: deco_path))
  end
  return if Breakpoint.potential_line?(path, line)
  fail(pr('break.errors.line', file: deco_path, line: line))
end

def description
  <<-EOD
    b[reak] [file:]line [if expr]
    b[reak] [module::...]class(.|#)method [if expr]
    #{short_description}
  EOD
end

def execute
  return puts(help) unless @match[1]
  b = line_breakpoint(@match[1]) || method_breakpoint(@match[1])
  if syntax_valid?(@match[2])
    return puts(pr('break.created', id: b.id, file: b.source, line: b.pos))
  end
  errmsg(pr('break.errors.expression', expr: @match[2]))
  b.enabled = false
rescue => e
  errmsg(e.message)
end

def line_breakpoint(loc)
  line = loc.match(/^(\d+)$/)
  file_line = loc.match(/^([^:]+):(\d+)$/)
  return nil unless line || file_line
  f, l = line ? [@state.file, line[1]] : [file_line[1], file_line[2]]
  check_errors(f, l.to_i)
  Breakpoint.add(File.expand_path(f), l.to_i, @match[2])
end

def method_breakpoint(location)
  location.match(/([^.#]+)[.#](.+)/) do |match|
    k = bb_warning_eval(match[1])
    m = match[2]
    klass = k && k.is_a?(Module) ? k.name : match[1]
    method = m.intern
    Breakpoint.add(klass, method, @match[2])
  end
end

def regexp
  /^\s* b(?:reak)? (?:\s+ (\S+))? (?:\s+ if \s+(.+))? \s*$/x
end

def short_description
  'Set breakpoint to some position, (optionally) if expr == true'
end