class FubuDocs

# File lib/fubudocs.rb, line 34
def initialize(options)
        # :host, :include, :nested, :dump
        @branch = options.fetch(:branch, 'gh-pages')
        @repository = options[:repository]
        @prefix = options.fetch(:prefix, 'docs')
        @export_dir = options.fetch(:dir, 'fubudocs-export')
        @options = options
end

# File lib/fubudocs.rb, line 64
def clean
        cleanDirectory @export_dir
        Dir.delete @export_dir unless !Dir.exists?(@export_dir)
end

# File lib/fubudocs.rb, line 114
def commit_new
        # commit and push the generated docs
        Dir.chdir @export_dir

        if !File.exists?('.nojekyll')
                writeNoJekyll
        end

        sh "git add ."
        sh 'git commit -a -m "Doc generation version ' + @options[:version] + '"' do |ok, res|
                if ok
                        sh "git push origin #{@branch}"
                        puts "Documentation generation and push to #{@repository}/#{@branch} is successful"
                else
                        puts "commit failed, might be because there are no differences in the content"
                end
        end

        Dir.chdir '..'
end

# File lib/fubudocs.rb, line 69
def create_branch
        sh "ripple gitignore #{@export_dir}"

        sh "git clone #{@repository} #{@export_dir}"

        Dir.chdir @export_dir

        sh "git checkout --orphan #{@branch}"
        sh "git rm -rf ."

        writeNoJekyll

        sh "git add ."
        sh 'git commit -a -m "initial clean slate"'
        sh 'git push origin #{@branch}'

        Dir.chdir '..'
end

# File lib/fubudocs.rb, line 156
def dump_task
        dumpTask = Rake::Task.define_task "#{@prefix}:dump" do
                clean
                @options[:dump] = true
                export
        end
        dumpTask.add_description "Export the generated documentation to #{@export_dir} for local usage"
end

# File lib/fubudocs.rb, line 43
def export
        cmd = "fubudocs export #{@export_dir}"
        if (@options[:host] != nil)
                cmd += " --host #{@options[:host]}"
        end

        if (@options[:include] != nil)
                cmd += " -i #{@options[:include]}"
        end

        if (@options[:nested] == true)
                cmd += " -m GhPagesChildFolder"
        elsif (@options[:dump] == true)
                cmd += " -m HtmlDump"
        else
                cmd += ' -m GhPagesRooted'
        end

        sh cmd
end

# File lib/fubudocs.rb, line 135
def export_tasks
        initTask = Rake::Task.define_task "#{@prefix}:init_branch" do
                clean
                create_branch
        end

        initTask.add_description "Initializes the #{@branch} branch in git repository #{@repository}"

        exportTaskName = "#{@prefix}:export"
        exportTask = Rake::Task.define_task exportTaskName do
                clean
                fetch_existing
                export
                commit_new
        end
        exportTask.add_description "Export the generated documentation to #{@repository}/#{@branch}"
        #exportTask.enhance [:compile]

        return exportTaskName
end

# File lib/fubudocs.rb, line 94
def fetch_existing
        Dir.mkdir @export_dir

        # fetch the gh-pages branch from the server
        Dir.chdir @export_dir
        sh 'git init'
        sh "git remote add -t #{@branch} -f origin #{@repository}"
        sh "git checkout #{@branch}"  

        # clean the existing content
        sleep 0.5 # let the file system try to relax its locks
        content_files = FileList['*.*'].exclude('.nojekyll').exclude('CNAME')
        content_files.each do |f|
                FileUtils.rm_r f
        end

        # do the actual export
        Dir.chdir '..'
end

# File lib/fubudocs.rb, line 88
def writeNoJekyll
        output = File.new( ".nojekyll", "w+" )
        output << "Just a marker"
        output.close
end