#encoding: utf-8
require 'base64'
class TrainingsController < ApplicationController
  wechat_responder

  skip_before_filter :check_if_login_required
  skip_before_filter :verify_signature, except: [:auth, :auth_callback, :pay_callback]

  ROOT_URL = ENV["wechat_url"] || "#{Setting.protocol}://#{Setting.host_name}"

  before_filter :authenticate, except: [:auth, :auth_callback, :pay_callback]

  before_filter :check_training_type, only: [:enroll]
  before_filter :check_current_training, only: [:show, :update, :pay, :pay_js, :update_payinfo, :result]

  layout 'base_trainings'

  def show
    @training = current_training

    if @training.training_payinfo.present? && params[:disable_redirect].blank?
      redirect_to result_training_path(id: friendly_id)
      return
    end

    render 'trainingsInfo'
  end

  def enroll
    @training = current_training || Training.new

    if @training.training_payinfo.present? && params[:disable_redirect].blank?
      redirect_to result_training_path(id: friendly_id)
      return
    end
  end

  def pay
    @training = current_training

    # 防止重复支付，对于已支付过的，不应该再到这个页来
    if @training.payed?
      redirect_to result_training_path(id: friendly_id)
      return
    end

    if @training.training_payinfo.blank?
      @training.build_training_payinfo
      @training.training_payinfo.fee = @training.registration_fee
      @training.training_payinfo.pay_type = params[:pay_type].presence || 3
    end
  end

  def pay_callback
    # {"xml"=>{"appid"=>"wx8c5bd82a8a584cf6", "bank_type"=>"CFT", "cash_fee"=>"1", "fee_type"=>"CNY",
    # "is_subscribe"=>"Y", "mch_id"=>"1516303811", "nonce_str"=>"c462b28237d5e70261c3171319d86bf5",
    # "openid"=>"o5fSc02LFi7LEGCk_ckp6YbegFWs", "out_trade_no"=>"2018101714093870",
    # "result_code"=>"SUCCESS", "return_code"=>"SUCCESS", "sign"=>"155D16352B5F2287A32B3121175D8B0B",
    # "time_end"=>"20181017140944", "total_fee"=>"1", "trade_type"=>"JSAPI",
    # "transaction_id"=>"4200000166201810174468792543"}}
    logger.info "pay_callback #{params}"
    unless params["xml"]
      logger.error "pay_callback error: not found xml"
    end

    pay = WechatPay.find_by_out_trade_no(params[:xml]["out_trade_no"])
    pay.update_attributes!(params[:xml])

    training = Training.find(pay.training_id)
    training_payinfo = training.training_payinfo
    training_payinfo.update_attributes!(status: TrainingPayinfo::Status_Payed,
                                        out_trade_no: pay.out_trade_no)

    # 报名成功发送短信
=begin
    begin
      Trustie::Sms.send(mobile: training.phone,
                        send_type: "training_pay",
                        user_name: training.name)
    rescue => e
      logger.error("pay_callback 短信发送失败: #{e}")
    end
=end

    render :xml => '' '
    <xml>
      <return_code><![CDATA[SUCCESS]]></return_code>
      <return_msg><![CDATA[OK]]></return_msg>
    </xml>
    ' ''
  end

  def result
    @training = current_training

    if @training.training_payinfo.blank?
      redirect_to training_path(id: friendly_id)
      return
    end
  end

  def create
    @training = Training.new
    @training.training_type = @training_type
    @training.openid = session[:wechat_open_id]

    save_training

    redirect_to training_path(id: friendly_id, disable_redirect: true)
  end

  def update
    @training = current_training
    save_training

    redirect_to training_path(id: friendly_id, disable_redirect: true)
  end


  # 对应两种情况的信息提交
  # 1. 稍后支付
  # 2. 立刻支付
  #    采用ajax调用方式，返回支付参数
  def update_payinfo
    @training = current_training
    training_info = @training.training_payinfo || @training.build_training_payinfo
    training_info.assign_attributes(params)

    # 已支付不能修改人数
    if training_info.not_payed?
      training_info.num = params[:enlistNum].to_i < 1 ? 1 : params[:enlistNum].to_i
      training_info.fee = @training.registration_fee(training_info.num)
    end

    ActiveRecord::Base.transaction do
      if training_info.pay_type.to_i == TrainingPayinfo::PayType_bank
        attachment = nil
        attachment = Attachment.create!(file: params[:image], author: User.first) if params[:image]

        if attachment.blank?
          flash[:message] = '请先上传支付凭证'
          render 'pay'
          return
        end

        training_info.attachment = attachment
      end

      if training_info.not_payed?
        if training_info.pay_type.to_i == TrainingPayinfo::PayType_Wechat
          training_info.status = TrainingPayinfo::Status_None
        else
          training_info.status = TrainingPayinfo::Status_Wait
        end
      end

      training_info.save!

      if params[:js] == 'true'
        Rails.logger.info("### start wechat pay => fee: #{training_info.fee}")
        _pay_js(training_info.fee)
      else
        redirect_to result_training_path(id: friendly_id)
      end
    end
  end


  ### js function
  def update_picture
    @training = current_training
    js_function_call do
      attachment = Attachment.create!(file: params[:image], author: User.first)
      training_payinfo = @training.training_payinfo
      training_payinfo.attachment = attachment
      training_payinfo.status = TrainingPayinfo::Status_Wait if training_payinfo.status == TrainingPayinfo::Status_None
      training_payinfo.save!
      render json: {status: 0}
    end
  end


  def pay_js
    @training = current_training
    _pay_js(@training.training_payinfo.fee)
  end

  #js获取支付参数
  def _pay_js(fee)
    @training = current_training
    js_function_call do
      out_trade_no = Wechat.pay.gen_trade_no
      #@training.training_payinfo.update_attribute(:out_trade_no, out_trade_no)
      #
      #
      # 写入wechat_pay付费表
      WechatPay.create!(training_id: @training.id, out_trade_no: out_trade_no)
      render json: {status: 0, data: unifiedorder(out_trade_no, fee, @training.pay_order_title)}
    end
  end


  # 用于权限跳转
  def auth
    state = params[:state]
    url = CGI.escape("#{ROOT_URL}/trainings/auth_callback?return_url=#{params[:return_url]}")
    authorize_url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=#{Wechat.config.appid}&redirect_uri=#{url}&response_type=code&scope=snsapi_base&state=#{state}&connect_redirect=1#wechat_redirect"
    redirect_to authorize_url
  end

  def auth_callback
    path = Base64.urlsafe_decode64(params[:state])
    open_id = get_openid_from_code(params[:code])
    unless open_id
      render 'wechats/open_wechat', layout: nil and return
    end

    session[:wechat_open_id] = open_id

    redirect_to params[:return_url].present? ? params[:return_url] : '/'
  end

  def test

  end

  private

  def authenticate
    if Rails.env.development?
      session[:wechat_open_id] = "o5fSc0607iR3rp4-h_VnuBTp8CiM"
    end

    unless session[:wechat_open_id].present?
      redirect_to auth_trainings_path(return_url: CGI.escape(request.path))
    end
  end

  def save_training
    @training.assign_attributes(params)
    @training.training_type = training_type

    if @training.training_type == 3
      @training.research_field = params[:research_field].select(&:present?).uniq.join(",")
    end

    @training.save!
  end

  def friendly_id
    @friendly_id ||= params[:friendly_id].presence || params[:id]
  end

  def training_type
    @training_type ||=
      case friendly_id
      when 'aeee0601_2019' then 3
      when 'ceeaa06_2019'  then 4
      end
  end

  def current_training
    @_current_training ||= begin
      Rails.logger.info("##########openid:#{session[:wechat_open_id]}, friendly_id: #{friendly_id}")

      return if training_type.blank?

      Training.where(openid: session[:wechat_open_id], training_type: training_type).first
    end
  end

  def check_training_type
    return if training_type.present?

    render_404
  end

  def check_current_training
    if current_training.blank?
      if training_type.blank?
        render_404
        return
      end

      redirect_to enroll_training_path(id: friendly_id)
      return
    end
  end

  def js_function_call
    begin
      yield if block_given?
    rescue => e
      render json: {status: 1, msg: e.message}
    end
  end

  def client_ip
    request.headers['X-Real-IP'] || request.remote_ip || "127.0.0.1"
  end

  def get_openid_from_code(code)
    openid = session[:wechat_open_id]
    unless openid
      if code
        #不能联系调两次web_access_token 否则会提示请在微信客户端打开次链接
        info = wechat.web_access_token(code)
        openid = info["openid"]
        access_token = info["access_token"]
        if access_token
          session[:access_token] = access_token
        end
        refresh_token = info["refresh_token"]
        if refresh_token
          session[:refresh_token] = refresh_token
        end
      end
    end

    if openid
      session[:wechat_open_id] = openid
    end

    return openid
  end


  def unifiedorder(out_trade_no, fee, title)
    @config = {}

    output = Wechat.pay.unifiedorder(title, (fee * 100).to_i, session[:wechat_open_id], client_ip, out_trade_no)
    data = output.fetch("xml")
    if data.nil?
      raise "获取微信统一单错误"
    end

    if data["return_code"] != 'SUCCESS'
      raise "获取微信统一单错误：#{data["return_msg"]}"
    end


    @config[:appid] = data["appid"]
    @config[:nonce] = data["nonce_str"]
    @config[:prepay_id] = data["prepay_id"]
    @config[:time] = Time.now.to_i


    info = {
        appId: @config[:appid],
        timeStamp: @config[:time],
        nonceStr: @config[:nonce],
        package: "prepay_id=#{@config[:prepay_id]}",
        signType: 'MD5'
    }
    @config[:sign] = Wechat.pay.sign(info)

    @config
  end
end