require 'svn/client'

class Product < GenericModel

  attr_reader :id

  # Dummy id which may be accessed by Rails
  @@int_id = 1

  def initialize(name)
    super
    @id = @@int_id
    @@int_id += 1
  end

  def self.find(what='', params={})
    # Cache the products' list
    @products ||= list_paths(AppConfig.svn['url']).collect {|p| Product.new(p)}
    if what == :all
      @products
    else
      @products.find { |p| p.name == what }
    end
  end

  def self.count(what='', params={})
    find(what, params).size
  end

  # Replacements for has_many:
  def branches
    self.class.list_paths(AppConfig.svn['url']+'/'+@name+'/branches').collect {|p| Branch.new(p)}
  end

  def tags
    self.class.list_paths(AppConfig.svn['url']+'/'+@name+'/tags').collect {|p| Tag.new(p)}
  end

  # Stub class for Errors
  class MyErrors
    def count
      0
    end
  end
  
  # Method which returns the stub Errors class
  def errors
    @errors ||= MyErrors.new
  end

  # For content_columns
  class MyColumn
    attr_accessor :name
    def initialize(name)
      @name = name
    end
    def human_name
      @name.capitalize
    end
  end

  def self.content_columns
    [MyColumn.new('name')]
  end

  private
  # Create SVN context
  def self.create_context
    ctx=Svn::Client::Context.new
    ctx.add_simple_prompt_provider(0) do |cred, realm, may_save, pool|
      cred.username = AppConfig.svn['user']
      cred.password = AppConfig.svn['password']
      cred.may_save = false
    end
    ctx
  end

  # Essentially do a 'list' command
  def self.list_paths(url)
    @ctx ||= create_context
    paths=Array.new
    @ctx.list(url, 'HEAD') do |path, dirent, lock, abs_path|
      paths.push(path)
    end
    paths.delete("")
    paths
  end
end