# encoding: UTF-8
require 'kafo/param_group'

module Kafo
  class ParamBuilder
    def initialize(mod, data)
      @data   = data
      @module = mod
      @groups = []
    end

    def validate
      return true if @module.configuration.app[:ignore_undocumented]

      parameters = @data[:parameters].sort
      docs       = @data[:docs].keys.sort
      if parameters == docs
        return true
      else
        undocumented = parameters - docs
        raise ConfigurationException, "undocumented parameters in #{@module.name}: #{undocumented.join(', ')}" unless undocumented.empty?
        deleted = docs - parameters
        raise ConfigurationException, "documentation mentioned unknown parameters in #{@module.name}: #{deleted.join(', ')}" unless deleted.empty?
        raise ConfigurationException, "unknown error in configuration in #{@module.name}"
      end
    end

    def build_params
      @data[:parameters].map do |param_name|
        build(param_name, @data)
      end
    end


    def build_param_groups(params)
      data = Hash[get_parameters_groups_by_param_name]
      data.each do |param_name, param_groups|
        param_groups.each_with_index do |group_name, i|
          param_group = find_or_build_group(group_name)
          if i + 1 < param_groups.size
            param_group.add_child find_or_build_group(param_groups[i + 1])
          end

          param_group = find_or_build_group(param_groups.last)
          param       = params.detect { |p| p.name == param_name }
          param_group.add_param param unless param.nil?
        end
      end

      # top level groups
      data.values.map(&:first).compact.uniq.map { |name| @groups.detect { |g| g.name == name } }
    end

    def build(name, data)
      data_type = data[:types][name] || 'Data'
      if data_type == 'password'
        type = Params::Password
        data_type = 'String'
      else
        type = Param
      end
      param           = type.new(@module, name, data_type)
      param.default   = data[:values][name]
      param.doc       = data[:docs][name]
      param.groups    = data[:groups][name]
      param.condition = data[:conditions][name]
      param
    end

    private

    def get_parameters_groups_by_param_name
      @data[:groups].map do |name, groups|
        [name, groups.select { |g| g =~ /parameters/i }]
      end
    end

    def find_or_build_group(name)
      param_group = @groups.detect { |g| g.name == name }
      unless param_group
        param_group        = ParamGroup.new(name)
        param_group.module = @module
        @groups.push param_group
      end
      param_group
    end
  end
end