class Tomlrb::Handler

# File lib/tomlrb/handler.rb, line 7
def initialize(**options)
  @output = {}
  @current = @output
  @stack = []
  @array_names = []
  @current_table = []
  @keys = Keys.new
  @symbolize_keys = options[:symbolize_keys]
end

# File lib/tomlrb/handler.rb, line 60
def assign(k)
  @keys.add_pair_key k, @current_table
  current = @current
  while (key = k.shift)
    key = key.to_sym if @symbolize_keys
    current = assign_key_path(current, key, k.empty?)
  end
end

# File lib/tomlrb/handler.rb, line 39
def deal_with_array_of_tables(identifiers, is_array_of_tables)
  stringified_identifier = identifiers.join('.')

  if is_array_of_tables
    @array_names << stringified_identifier
    last_identifier = identifiers.pop
  elsif @array_names.include?(stringified_identifier)
    raise ParseError, 'Cannot define a normal table with the same name as an already established array'
  end

  yield(identifiers)

  if is_array_of_tables
    last_identifier = last_identifier.to_sym if @symbolize_keys
    @current[last_identifier] ||= []
    raise ParseError, "Cannot use key #{last_identifier} for both table and array at once" unless @current[last_identifier].respond_to?(:<<)
    @current[last_identifier] << {}
    @current = @current[last_identifier].last
  end
end

# File lib/tomlrb/handler.rb, line 108
def end_(type)
  array = []
  while (value = @stack.pop) != [type]
    raise ParseError, 'Unclosed table' if @stack.empty?

    array.unshift(value)
  end
  array
end

# File lib/tomlrb/handler.rb, line 69
def push(o)
  @stack << o
end

# File lib/tomlrb/handler.rb, line 73
def push_inline(inline_arrays)
  merged_inline = {}
  keys = Keys.new

  inline_arrays.each do |inline_array|
    current = merged_inline
    value = inline_array.pop
    keys.add_table_key inline_array, value.is_a?(Array)

    inline_array.each_with_index do |inline_key, inline_index|
      inline_key = inline_key.to_sym if @symbolize_keys
      last_key = inline_index == inline_array.size - 1

      if last_key
        if current[inline_key].nil?
          keys.add_pair_key [inline_key], []

          current[inline_key] = value
        else
          raise Key::KeyConflict, "Inline key #{inline_key} is already used"
        end
      else
        current[inline_key] ||= {}
        current = current[inline_key]
      end
    end
  end

  push(merged_inline)
end

# File lib/tomlrb/handler.rb, line 17
def set_context(identifiers, is_array_of_tables: false)
  if identifiers.empty?
    raise ParseError, 'Array needs a name'
  end

  @current_table = identifiers.dup
  @keys.add_table_key identifiers, is_array_of_tables
  @current = @output

  deal_with_array_of_tables(identifiers, is_array_of_tables) do |identifierz|
    identifierz.each do |k|
      k = k.to_sym if @symbolize_keys
      if @current[k].is_a?(Array)
        @current = @current[k].last
      else
        @current[k] ||= {}
        @current = @current[k]
      end
    end
  end
end

# File lib/tomlrb/handler.rb, line 104
def start_(type)
  push([type])
end

# File lib/tomlrb/handler.rb, line 118
def validate_value(value)
  if value.nil?
    raise ParseError, 'Value must be present'
  end
end

# File lib/tomlrb/handler.rb, line 126
def assign_key_path(current, key, key_emptied)
  existed = current.key?(key)
  raise ParseError, "Cannot overwrite value with key #{key}" if existed && !current[key].is_a?(Hash)
  if key_emptied
    raise ParseError, "Cannot overwrite value with key #{key}" unless current.is_a?(Hash)

    value = @stack.pop
    raise ParseError, "Cannot overwrite value with key #{key}" if current[key].is_a?(Hash) && !value.is_a?(Hash)
    current[key] = value
    return current
  end
  current[key] ||= {}
  current[key]
end