# encoding: utf-8
module LocalPac
  module App
    class GitHookController < ApplicationController

      set :observers, [LocalPac::App::FileServeController, LocalPac::App::LookupController]

      helpers Sinatra::Param
      helpers Sinatra::JSON

      error do
        handler = ErrorHandler.find(StandardError)

        halt 500, handler.to_json
      end

      error Exceptions::GivenUrlInvalid do
        handler = ErrorHandler.find(Exceptions::GivenUrlInvalid)
        handler.use(url: env['sinatra.error'].message)

        halt 401, handler.to_json
      end

      not_found do
        handler = ErrorHandler.find(Exceptions::GitHookUnknown)
        handler.use(name: env['PATH_INFO'])

        halt 404, handler.to_json
      end

      set :raise_sinatra_param_exceptions, true

      error Sinatra::Param::InvalidParameterError do
        handler = ErrorHandler.find(Sinatra::Param::InvalidParameterError)
        handler.use(JSON.dump(parameter: env['sinatra.error'].param))

        halt 401, handler.to_json
      end

      error Exceptions::PacFileInvalid do
        handler = ErrorHandler.find(Exceptions::PacFileInvalid)
        handler.use(JSON.dump(name: env['sinatra.error']))

        halt 403, handler.to_json
      end

      error Exceptions::ApiKeyInvalid do
        handler = ErrorHandler.find(Exceptions::ApiKeyInvalid)

        halt 403, handler.to_json
      end

      error Exceptions::ReloadOfLocalStorageFailed do
        handler = ErrorHandler.find(Exceptions::ReloadOfLocalStorageFailed)

        halt 500, handler.to_json
      end

      before do
        fail Exceptions::ApiKeyInvalid unless params['api_key'] == LocalPac.config.api_key
      end

      post '/pre-receive' do
        param :old_commit_id, String, required: true
        param :new_commit_id, String, required: true
        param :reference, String, required: true
        param :api_key, String, required: true

        validator = PacFileValidator.new

        repo = GitStorage.new(LocalPac.config.local_storage)
        repo.each_added_pac_file(params[:old_commit_id], params[:new_commit_id]) do |f|
          fail Exceptions::PacFileInvalid, name: f.path  unless validator.valid?(f)
        end

        LocalPac::Actions::ReloadLocalStorage.new(settings.observers).run

        json result: :success
      end
    end
  end
end