$:.push(File.dirname(__FILE__))
require 'rubygems'
require 'rake/clean'
require 'rake/tasklib'
require 'yaml'
require 'log'
require 'erb'
require 'uri'
require 'fileutils'
require 'zip/zipfilesystem'
require 'archive/tar/minitar'

module PatternPark
  class SproutError < StandardError; end
  class UsageError < SproutError; end

  class Sprout
    attr_accessor :name,
                  :type,
                  :render,
                  :platform,
                  :base_url,
                  :dependencies,
                  :targets,
                  :config_cache,
                  :config

    @@base_urls = ['http://projectsprouts.googlecode.com/svn/trunk/sprouts/',
                   'http://www.projectsprouts.org/sprout/']
    @@default_rakefiles = ['rakefile', 'Rakefile', 'rakefile.rb', 'Rakefile.rb'].freeze
    @@universal = 'universal'
    @@update = false
    @@project_name = ''
    @@config_cache = nil
    @@home = nil
    @@cache = nil
    @@project_path = nil
    
    ##
    # Given a simple string @name, request that sprout
    # definition from each location in the location list
    # until it's found
    #
    def Sprout.load(name)
      local = File.join(Sprout.config_cache, name)
      if(!Sprout.update && File.exists?(local))
        return Sprout.load_local(local)
      else
        @@base_urls.each do |url|
          begin
            loader = RemoteFileLoader.new
            loader.get_remote_file(url + name, local)
            sprout = Sprout.load_local(local)
            if(sprout.post_install)
              eval(sprout.post_install)
            end
            return sprout
          rescue OpenURI::HTTPError => e
            Log.puts("[WARNING] Sprout not found at: #{url + name}, trying next location")
            next
          end
          raise SproutError.new("\n[ERROR] Sprout could not find '#{name}' definition at any known locations, please check the sprout name and try again.")
        end
      end
    end
    
    ##
    # Retrieve and resolve a locally downloaded Sprout
    def Sprout.load_local(path)
      data = nil
      File.open(path, 'r') do |f|
        data = f.read
      end
      data = ERB.new(data, nil, '>').result(binding)
      begin
        sprout = YAML.load(data)
      rescue StandardError => e
        Log.puts("[ERROR] An invalid sprout definition was encountered at: [#{path}] with:\n\n#{data}\n\nPlease try again...")
        if(File.exists?(path))
          File.delete(path)
        end
        raise UsageError.new('Invalid Sprout definiton')
      end
      sprout.resolve
      return sprout
    end
    
    def Sprout.update=(update)
      @@update = update
    end
    
    def Sprout.update
      return @@update
    end

    ##
    # Begin loading and resolving this Sprout instance
    # and recursively call on dependencies
    def resolve
      load_target
      load_dependencies
    end
    
    def execute
      dependencies.each do |dep|
        dep.execute
      end
    end
    
    def post_install
      if(target.nil?)
        return nil
      end
      return target.post_install
    end

    ##
    # Load the remote file target associated with this sprout instance
    def load_target
      target = get_platform_target
      if(target)
        # Forward type name so that RemoteFileTargets can place
        # downloaded files into the appropriate user home folder
        target.type = type 
        target.resolve
      end
    end

    ##
    # Take the array of string dependency names
    # load each dependency YAML file, and replace
    # the array with resolved Sprout instances
    # Tell each dependency to load it's own
    # dependencies
    def load_dependencies(loaded_deps=nil)
      loaded_deps = (loaded_deps.nil?) ? [name] : loaded_deps # Don't reload deps have already been loaded
      deps = []

      if(dependencies)
        dependencies.each do |dep|
          dep.values.each do |name|
            if(!loaded_deps.index(name))
              dep = Sprout.load(name)
              loaded_deps << name
              deps << dep
            end
          end
        end
      end
      @dependencies = deps
    end
    
    ##
    # Insert search locations (Array) 'base paths' for Sprout.load operations
    def Sprout.insert_locations(locations)
      @@base_urls = Sprout.clean_locations(locations) + @@base_urls
    end
    
    # TODO: Be smart about added a trailing '/'
    # Try to ensure that only valid URLs get
    # added to the list of locations - throw
    # something informative if needed.
    def Sprout.clean_locations(locations)
      return locations
    end
    
    ##
    # The system-specific home folder for Sprout application data
    # e.g., On OS X, /Users/you/Library/Sprouts
    # e.g., On Win, C:\Documents And Settings\you\Local Settings\Application Data\Sprouts
    def Sprout.home
      if(@@home.nil?)
        @@home = User.new().application_home(:sprouts)
      end
      return @@home
    end
    
    ##
    # The nearest valid project path or current working directory
    # if no rakefile was found in parent paths
    def Sprout.project_path(path=nil)
      if(@@project_path.nil?)
        path = (path.nil?) ? Dir.pwd : path;
        path = Sprout.get_project_path(path)
        if(path.nil?)
          path = Dir.pwd
        end
        @@project_path = path
      end
      return @@project_path
    end
    
    def Sprout.project_path=(path)
      @@project_path = path
    end
    
    def Sprout.get_project_path(path)
      if(path.nil? || path == '/')
        return nil
      end
      @@default_rakefiles.each do |file|
        if(File.exists?(File.join(path, file)))
          return path
        end
      end
      return Sprout.get_project_path(File.dirname(path))
    end
    
    ##
    # Offline storage location for network entities like
    # Sprout definitions, tasks and archives
    def Sprout.cache
      if(@@cache.nil?)
        @@cache = File.join(Sprout.home, 'cache')
      end
      return @@cache
    end
    
    def Sprout.config_cache
      if(@@config_cache.nil?)
        @@config_cache = File.join(Sprout.cache, 'sprouts')
      end
      return @@config_cache
    end
    
    ##
    # List of potential rakefile names for project_path searching
    def Sprout.default_rakefiles
      return @@default_rakefiles
    end
    
    def Sprout.rakefile
      @@default_rakefiles.each do |name|
        file = File.join(Sprout.project_path, name)
        if(File.exists?(file))
          return file
        end
      end
      return nil
    end
    
    ##
    # Reset static values for test purposes
    def Sprout.init_values
      User.init_values
      @@project_path = nil
      @@config_cache = nil
      @@cache = nil
      @@home = nil
    end

    ##
    # List of files to ignore when copying project templates
    # These files will not be copied
    @@COPY_IGNORE_FILES = ['.', '..', '.svn', '.DS_Store', 'CVS', '.cvs' 'Thumbs.db', '__MACOSX', '.Trashes', 'Desktop DB', 'Desktop DF']
    # Do not copy files found in the ignore_files list
    def Sprout.ignore_file? file
      @@COPY_IGNORE_FILES.each do |name|
        if(name == file)
          return true
        end
      end
      return false
    end
    
    ## 
    # The project name as entered in the sprout shell command
    def Sprout.project_name=(name)
      @@project_name = name
    end
    
    def Sprout.project_name
      return @@project_name
    end
    
    def get_platform_target
      usr = User.new
      @target = nil
      if(targets)
        universal_target = nil
        platform = usr.platform.to_s
        targets.each do |t|
          if(t.platform == platform)
            @target = t
          elsif(t.platform == @@universal)
            universal_target = t
          end
        end
        if(target.nil? && universal_target)
          @target = universal_target
        end
      end
      return @target
    end
    
    ##
    # The first FileTarget that is applicable for this
    # client operating system
    def target
      return @target
    end
    
    def archive_path
      return File.join(install_path, target.archive_path)
    end
    
    def install_path
      target.install_path
    end
    
    def downloaded_path
      target.downloaded_path
    end
    
    def config_path(name)
      return Sprout.config_cache + name
    end
  end

  require 'singleton'
  require 'progress_bar'
  require 'template_resolver'
  require 'platform'
  require 'user'
  require 'project'
  require 'library'
  require 'template'
  require 'task'
  require 'command'
  require 'tool'
  require 'remote_file_loader'
  require 'file_target'
  require 'remote_file_target'
  
  require 'project_model'
  require 'generate'
end

cache = File.join(PatternPark::Sprout.cache)
$:.push(cache)