#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require File.join(File.dirname(__FILE__), "mixin", "from_file")

class Chef
  class Recipe
    
    include Chef::Mixin::FromFile
        
    attr_accessor :cookbook_name, :recipe_name, :recipe, :node, :collection, 
                  :definitions, :params, :cookbook_loader
    
    def initialize(cookbook_name, recipe_name, node, collection=nil, definitions=nil, cookbook_loader=nil)
      @cookbook_name = cookbook_name
      @recipe_name = recipe_name
      @node = node
      
      if collection
        @collection = collection
      else
        @collection = Chef::ResourceCollection.new()
      end
      
      if definitions
        @definitions = definitions
      else
        @definitions = Hash.new
      end
      
      if cookbook_loader
        @cookbook_loader = cookbook_loader
      else
        @cookbook_loader = Chef::CookbookLoader.new()
      end
      
      @params = Hash.new
    end
    
    def require_recipe(*args)
      args.flatten.each do |recipe|
        rmatch = recipe.match(/(.+?)::(.+)/)
        if rmatch
          cookbook = @cookbook_loader[rmatch[1]]
          cookbook.load_recipe(rmatch[2], @node, @collection, @definitions, @cookbook_loader)
        else
          cookbook = @cookbook_loader[recipe]
          cookbook.load_recipe("default", @node, @collection, @definitions, @cookbook_loader)
        end
      end
    end
    
    def resources(*args)
      @collection.resources(*args)
    end
    
    def search(type, query, &block)
      s = Chef::Search.new
      s.search(type, query, &block)
    end
        
    def method_missing(method_symbol, *args, &block)
      resource = nil
      # If we have a definition that matches, we want to use that instead.  This should
      # let you do some really crazy over-riding of "native" types, if you really want
      # to. 
      if @definitions.has_key?(method_symbol)
        new_def = @definitions[method_symbol].dup
        new_def.instance_eval(&block) if block
        new_recipe = Chef::Recipe.new(@cookbook_name, @recipe_name, @node, @collection, @definitions, @cookbook_loader)
        new_recipe.params = new_def.params
        new_recipe.params[:name] = args[0]
        new_recipe.instance_eval(&new_def.recipe)
      else
        method_name = method_symbol.to_s
      # Otherwise, we're rocking the regular resource call route.
        rname = nil
        mn = method_name.match(/^(.+)_(.+)$/)
        if mn
          rname = "Chef::Resource::#{mn[1].capitalize}#{mn[2].capitalize}"
        else
          short_match = method_name.match(/^(.+)$/)
          if short_match
            rname = "Chef::Resource::#{short_match[1].capitalize}"
          end
        end
        begin
          args << @collection
          args << @node
          resource = eval(rname).new(*args)
          resource.cookbook_name = @cookbook_name
          resource.recipe_name = @recipe_name
          resource.params = @params
          resource.instance_eval(&block) if block
        rescue Exception => e
          if e.kind_of?(NameError) && e.to_s =~ /Chef::Resource/
            raise NameError, "Cannot find #{rname} for #{method_name}\nOriginal: #{e.to_s}"
          else
            raise e
          end
        end
        @collection << resource
        resource
      end
    end
  end
end