require 'csv'
require 'nkf'

csv_title = ["id", "用户名称", "用户电话","最后登录时间", "用户部门", "所属高校","课程数量", "高校省份", "高校城市", "高校地址", "实训总数"]

school_ids = School.select(:id, :province).where(province: ["安徽","江苏"]).pluck(:id)

user_items = []
an_items = []
j_items = []
users = UserExtension.where(school_id: school_ids, identity: :teacher).includes(:user,:department, school: :courses)

users.each_with_index do |u, index|
  user = u.user 
  school = u.school
  course_count = school.courses.size

  shixun = SchoolReport.select(:school_id, :shixun_evaluate_count).find_by(school_id: u.school_id).try(:shixun_evaluate_count)
  item = [index+1, user.try(:show_real_name), user.try(:phone), user.try(:last_login_on), u&.department.try(:name),
    school.try(:name),course_count, school.try(:province), school.try(:city), school.try(:address), shixun]
    if u.school.try(:province) == "安徽"
      an_items.push(item)
    else 
      j_items.push(item)
    end
end

user_items = an_items + j_items

csv_string = CSV.generate(headers: true) do |csv|
  csv << csv_title  
  user_items.each do |i|
    csv << i
  end
  
end

fh = File.new("public/teachers.csv", "wb")
fh.puts NKF.nkf("-wL",csv_string)
fh.close