#!/usr/bin/python3

from flask import request, send_from_directory
from flask_api import FlaskAPI
import RPi.GPIO as GPIO
import shutil
import os

from xml_reader import Xml_reader
from interface_handler import Interface_handler

dir = os.path.dirname(os.path.abspath(__file__))
xml_reader = Xml_reader(str(dir + '/XML/config.xml'),str(dir + '/XML/config.xsd'))
interface_handler = Interface_handler(xml_reader)

device_names = xml_reader.get_device_names()

app = FlaskAPI(__name__)

@app.route('/', methods=["GET"])
def api_root():
    return {
           "device_url": request.url + "device/<device_name>",
             "device_url_POST": {"output": "<value>"}
                 }

@app.route('/XML/', methods=["GET","POST"])
def xml_transfer(self):
    try:
        #return the current config.xml
        if request.method == "GET":
            return send_from_directory(str(dir + 'XML'), 'config.xml')

        # set a new config.xml
        if request.method == "POST":
            if not os.path.exists('/tmp/aped_device'):
                os.mkdir("/tmp/aped_device")
            tmp_file = open("/tmp/aped_device/config.xml","w")
            data = request.get_data(as_text=True)
            tmp_file.write(data)
            tmp_file.close()
            #check config.xml against the XSD file
            if xml_reader.validate('/tmp/aped_device/config.xml',str(dir + 'XML/config.xsd')):
                shutil.move(str(dir + 'XML/config.xml'),str(dir + 'XML/config_old.xml'))
                shutil.move('/tmp/aped_device/config.xml',str(dir + 'XML/config.xml'))
                self.interface_handler = Interface_handler(self.xml_reader)
            else:
                SyntaxError('the config.xml has invalid content')
            return {'error': ''}
    except Exception as e:
        return {'error' : str(e)}
  
@app.route('/device/<device_name>/', methods=["GET", "POST"])
def api_leds_control(device_name):
    try:
        if request.method == "POST":
            response = interface_handler.write(device_name,request.data.get("output"))
            return {'output': str(response)}
        return {'state': interface_handler.read(device_name)}
    except Exception as e:
        return {'error': str(e)}

if __name__ == "__main__":
    app.run(port=8080,host="0.0.0.0")