from flask import Flask, render_template, request, abort
import os
from datetime import datetime

app = Flask(__name__)

TEPLOTA_FILE = "teplota.txt"
VLHKOST_FILE = "vlhkost.txt"

def appendToFile(file,value):
    try:
        timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        with open(file,"a") as f:
            f.write(f"{timestamp},{value}")
        return True
    except Exception as e:
        print(f"Chyba při zápisu do souboru {file}:{e}")
        return False
    
def readLastLine(filename):
    try:
        with open(filename,"r") as f:
            lines = f.readlines()
            for line in reversed(lines):
                stripped_line = line.strip()
                if stripped_line:
                    parts = stripped_line.split(",")
                    if len(parts) == 2:
                        return parts[1]
                    else:
                        return stripped_line
            return "žádná data"
    except FileNotFoundError:
        return "Soubor nenalezen"
    except Exception as e:
        print(f"Chyba při čtení souboru {filename}:{e}")
        return "Chyba čtení"
    
@app.route("/")
def index():
    last_temp = readLastLine(TEPLOTA_FILE)
    last_hum = readLastLine(VLHKOST_FILE)
    return render_template("index.html",last_t = last_temp,last_h=last_hum)

@app.route("/api/teplota/<int:value>", methods=["GET","POST"])
def record_t(value):
    if appendToFile(TEPLOTA_FILE,value):
        return f"Teplota {value}°C uložena",200
    else:
        return "Chyba při ukládání teploty", 500
    
@app.route("/api/vlhkost/<int:value>", methods=["GET","POST"])
def record_h(value):
    if appendToFile(VLHKOST_FILE,value):
        return f"vlhkost {value}°C uložena",200
    else:
        return "Chyba při ukládání teploty", 500
    
if __name__ == "__main__":
    app.run(debug=True, host="0.0.0.0", port=5000)