# from sqlalchemy import metadata
import sqlalchemy as db

#########################
# stack overflow:
    # Python sanitizing html from a string
def escape(htmlstring):
    escapes = {'\"': '"',
               '\'': ''',
               '<': '&lt;',
               '>': '&gt;'}
    # This is done first to prevent escaping other escapes.
    htmlstring = htmlstring.replace('&', '&amp;')
    for seq, esc in escapes.iteritems():
        htmlstring = htmlstring.replace(seq, esc)
    return htmlstring
#########################

# connect to server
engine = db.create_engine('mysql+pymysql://root:@0.0.0.0/registro_escolar_1')

connection = engine.connect()
# estudiantes = db.Table('estudiantes', metadata, autoload=True, autoload_with=engine)
# usuarios = db.Table('usuarios', metadata, autoload=True, autoload_with=engine)

def estudiantes():
    query = 'SELECT u.id, u.nombres, u.apellidos, u.email FROM usuarios u, estudiantes m WHERE u.id = m.user_id'
    result_db = connection.execute(query).fetchall()

    ###### headers

    headers = '['
    headers += '{"nombre":"Nombre"}'
    headers += ','
    headers += '{"nombre":"Grado"}'
    headers += ','
    headers += '{"nombre":"Email"}'
    headers += ','
    headers += '{"nombre":"Informacion"}'
    headers += ','
    headers += '{"nombre":"Editar"}'
    headers += ']'
    # headers = '[{"nombre":"Nombre"},{"nombre":"Posicion"},{"nombre":"Informacion"},{"nombre":"Editar"}]'

    ###### tabla


    tabla = '['
    modal_content = '['
    i = 0
    len_result = len(result_db)
    for q in result_db:
        i = i+1
        tabla += '{'
        modal_content += '{'
        tabla += '"Nombre":"'+escape(q[1])+' '+escape(q[2])+'"'
        modal_content += '"Nombre":"'+escape(q[1])+' '+escape(q[2])+'"'
        tabla += ','
        modal_content += ','

        query = 'SELECT grado FROM estudiantes e WHERE e.user_id = ' + str(q[0])
        total_hijos = connection.execute(query).fetchall()

        tabla += '"Hijos Matriculados":"'+str(total_hijos[0][0])+'"'
        modal_content += '"Hijos Matriculados":"'+str(total_hijos[0][0])+'"'

        tabla += ','
        modal_content += ','
        tabla += '"Email":"'+escape(q[3])+'"'
        modal_content += '"Email":"'+escape(q[3])+'"'
        tabla += ','
        modal_content += ','
        tabla += '"user_id":"'+str(q[0])+'"'
        modal_content += '"user_id":"'+str(q[0])+'"'
        tabla += '}'
        modal_content += '}'
        if i < len_result:
            tabla += ','
            modal_content += ','
    tabla += ']'
    modal_content += ']'

    ###### info

    info = '{'
    info += '"dash_name":"Manejar Estudiantes"'
    info += ','
    info += '"dash_link":"/admin/ver/"'
    info += ','
    info += '"dash_sub_name":"Estudiantes Registrados"'
    info += ','
    info += '"add":"Anadir Estudiantes"'
    info += ','
    info += '"add_link":"/admin/forma/add/estudiante/"'
    info += ','
    info += '"dir1":"#"'
    info += ','
    info += '"dir2":"/admin/forma/edit/estudiante/"'
    info += '}'

    ###### modal

    modal = '{'
    modal += '"infoName":"Ver informacion"'
    modal += ','
    modal += '"editName":"/admin/ver/"'
    modal += '}'

    result = '{"headers":'+headers+',"tabla":'+tabla+',"modal_content":'+modal_content+',"info":'+info+',"modal":'+modal+'}'

    # print(result)
    return(result)