# encoding: UTF-8
# frozen_string_literal: true

module API
  module V2
    module Admin
      class Blockchains < Grape::API
        helpers ::API::V2::Admin::Helpers

        namespace :blockchains do
          desc 'Get all blockchains, result is paginated.',
            is_array: true,
            success: API::V2::Admin::Entities::Blockchain
          params do
            optional :key,
              values: { value: -> { ::Blockchain.pluck(:key) }, message: 'admin.blockchain.blockchain_key_doesnt_exist' },
              desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:key][:desc] }
            optional :client,
              values: { value: -> { ::Blockchain.clients.map(&:to_s)  }, message: 'admin.blockchain.blockchain_client_doesnt_exist' },
              desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:client][:desc] }
            optional :status,
              values: { value: -> { %w[active disabled] }, message: 'admin.blockchain.blockchain_status_doesnt_exist' },
              desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:status][:desc] }
            optional :name,
              values: { value: -> { ::Blockchain.pluck(:name) }, message: 'admin.blockchain.blockchain_name_doesnt_exist' },
              desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:name][:desc] }
            use :pagination
            use :ordering
          end
          get do
            admin_authorize! :read, Blockchain

            ransack_params = Helpers::RansackBuilder.new(params)
                               .eq(:key, :client, :status, :name)
                               .build

            search = ::Blockchain.ransack(ransack_params)
            search.sorts = "#{params[:order_by]} #{params[:ordering]}"
            present paginate(search.result), with: API::V2::Admin::Entities::Blockchain
          end

          desc 'Get available blockchain clients.',
            is_array: true
          get '/clients' do
            Blockchain.clients
          end

          desc 'Get a blockchain.' do
            success API::V2::Admin::Entities::Blockchain
          end
          params do
            requires :id,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_id' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:id][:desc] }
          end
          get '/:id' do
            admin_authorize! :read, Blockchain

            present Blockchain.find(params[:id]), with: API::V2::Admin::Entities::Blockchain
          end

          desc 'Get a latest blockchain block.'
          params do
            requires :id,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_id' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:id][:desc] }
          end
          get '/:id/latest_block' do
            admin_authorize! :read, Blockchain

            Blockchain.find(params[:id])&.blockchain_api.latest_block_number
          rescue
            error!({ errors: ['admin.blockchain.latest_block'] }, 422)
          end

          desc 'Create new blockchain.' do
            success API::V2::Admin::Entities::Blockchain
          end
          params do
            requires :key,
                     values: { value: -> (v){ v && v.length < 255 }, message: 'admin.blockchain.key_too_long' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:key][:desc] }
            requires :name,
                     values: { value: -> (v){ v && v.length < 255 }, message: 'admin.blockchain.name_too_long' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:name][:desc] }
            requires :client,
                     values: { value: -> { ::Blockchain.clients.map(&:to_s) }, message: 'admin.blockchain.invalid_client' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:client][:desc] }
            requires :height,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_height' },
                     values: { value: -> (p){ p.try(:positive?) }, message: 'admin.blockchain.non_positive_height' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:height][:desc] }
            optional :explorer_transaction,
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:explorer_transaction][:desc] }
            optional :explorer_address,
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:explorer_address][:desc] }
            optional :server,
                     regexp: { value: URI::regexp, message: 'admin.blockchain.invalid_server' },
                     desc: -> { 'Blockchain server url' }
            optional :status,
                     values: { value: %w(active disabled), message: 'admin.blockchain.invalid_status' },
                     default: 'active',
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:status][:desc] }
            optional :min_confirmations,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_min_confirmations' },
                     values: { value: -> (p){ p.try(:positive?) }, message: 'admin.blockchain.non_positive_min_confirmations' },
                     default: 6,
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:min_confirmations][:desc] }
          end
          post '/new' do
            admin_authorize! :create, Blockchain

            blockchain = Blockchain.new(declared(params))
            if blockchain.save
              present blockchain, with: API::V2::Admin::Entities::Blockchain
              status 201
            else
              body errors: blockchain.errors.full_messages
              status 422
            end
          end

          desc 'Update blockchain.' do
            success API::V2::Admin::Entities::Blockchain
          end
          params do
            requires :id,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_id' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:id][:desc] }
            optional :key,
                     type: String,
                     values: { value: -> (v){ v.length < 255 }, message: 'admin.blockchain.key_too_long' },
                     coerce_with: ->(v) { v.strip.downcase },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:key][:desc] }
            optional :name,
                     values: { value: -> (v){ v.length < 255 }, message: 'admin.blockchain.name_too_long' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:name][:desc] }
            optional :client,
                     values: { value: -> { ::Blockchain.clients.map(&:to_s) }, message: 'admin.blockchain.invalid_client' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:client][:desc] }
            optional :server,
                     regexp: { value: URI::regexp, message: 'admin.blockchain.invalid_server' },
                     desc: -> { 'Blockchain server url' }
            optional :height,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_height' },
                     values: { value: -> (p){ p.try(:positive?) }, message: 'admin.blockchain.non_positive_height' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:height][:desc] }
            optional :explorer_transaction,
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:explorer_transaction][:desc] }
            optional :explorer_address,
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:explorer_address][:desc] }
            optional :status,
                     values: { value: %w(active disabled), message: 'admin.blockchain.invalid_status' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:status][:desc] }
            optional :min_confirmations,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_min_confirmations' },
                     values: { value: -> (p){ p.try(:positive?) }, message: 'admin.blockchain.non_positive_min_confirmations' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:min_confirmations][:desc] }
          end
          post '/update' do
            admin_authorize! :update, Blockchain, params.except(:id)

            blockchain = Blockchain.find(params[:id])
            if blockchain.update(declared(params, include_missing: false))
              present blockchain, with: API::V2::Admin::Entities::Blockchain
            else
              body errors: blockchain.errors.full_messages
              status 422
            end
          end

          desc 'Process blockchain\'s block.' do
            success API::V2::Admin::Entities::Blockchain
          end
          params do
            requires :id,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_id' },
                     desc: -> { API::V2::Admin::Entities::Blockchain.documentation[:id][:desc] }
            requires :block_number,
                     type: { value: Integer, message: 'admin.blockchain.non_integer_block_number' },
                     values: { value: -> (p){ p.try(:positive?) }, message: 'admin.blockchain.non_positive_block_number' },
                     desc: -> { 'The id of a particular block on blockchain' }
          end
          post '/process_block' do
            admin_authorize! :update, Blockchain

            blockchain = Blockchain.find(params[:id])
            begin
              blockchain.blockchain_api.process_block(params[:block_number])
              present blockchain, with: API::V2::Admin::Entities::Blockchain
              status 201
            rescue StandardError => e
              Rails.logger.error { "Error: #{e} while processing block #{params[:block_number]} of blockchain id: #{params[:id]}" }
              error!({ errors: ['admin.blockchain.process_block'] }, 422)
            end
          end
        end
      end
    end
  end
end