require 'sinatra'
require 'fileutils'
require 'carthage_remote_cache'

get '/' do
  "Welcome to carthage_remote_cache"
end

versions_path = '/versions/:xcodebuild_version/:swift_version/:dependency_name/:version/:version_filename'
frameworks_path = '/frameworks/:xcodebuild_version/:swift_version/:dependency_name/:version/:framework_name/:platform'

get versions_path do
  dirname = params_to_framework_dir(params)
  filename = params[:version_filename]
  filepath = File.join(dirname, filename)

  if File.exist?(filepath)
    status(200)
    send_file(filepath)
  else
    status(404)
  end
end

post versions_path do
  dirname = params_to_framework_dir(params)
  filename = params[:version_filename]

  source_file = params[:version_file][:tempfile]
  target_filename = File.join(dirname, filename)

  FileUtils.mkdir_p(dirname) unless File.directory?(dirname)
  File.delete(target_filename) if File.exist?(target_filename)

  $LOG.info("Writing: #{target_filename}")
  File.open(target_filename, 'wb') do |target_file|
    target_file.write(source_file.read)
  end

  status(200)
end

# Retrieve .zip framework archive.
get frameworks_path do
  dirname = params_to_framework_dir(params)
  archive = CarthageArchive.new(params[:framework_name], params[:platform].to_sym)
  filename = File.join(dirname, archive.archive_filename)

  if File.exist?(filename)
    status(200)
    send_file(filename)
  else
    status(404)
  end
end

# Upload framework archive. Overwrites already cached archive if exists.
post frameworks_path do
  filename = params[:framework_file][:filename]
  source_file = params[:framework_file][:tempfile]

  dirname = params_to_framework_dir(params)
  target_filename = File.join(dirname, filename)

  FileUtils.mkdir_p(dirname) unless File.directory?(dirname)
  File.delete(target_filename) if File.exist?(target_filename)

  $LOG.info("Writing: #{target_filename}")
  File.open(target_filename, 'wb') do |target_file|
    target_file.write(source_file.read)
  end

  status(200)
end

private

def params_to_framework_dir(params)
  File.join(SERVER_CACHE_DIR, params[:xcodebuild_version], params[:swift_version], params[:dependency_name], params[:version])
end