import sqlite3

conn = sqlite3.connect("iot_data.sqlite")
cursor = conn.cursor()

cursor.execute("""
    CREATE TABLE IF NOT EXISTS mereni (
        id  INTEGER PRIMARY KEY AUTOINCREMENT,
        cas TEXT NOT NULL,
        teplota REAL NOT NULL,
        vlhkost REAL NOT NULL           
    )
""")
conn.commit()
print("Tabulka mereni vytovřena (nebo již existuje).☺")

testovaci_data = [
    ("2026-03-18 08:00:00", 22.5,45.0),
    ("2026-03-18 08:05:00", 23.5,48.0),
    ("2026-03-18 08:10:00", 23.2,44.0),
    ("2026-03-18 08:15:00", 22.8,49.0),
    ("2026-03-18 08:20:00", 25.2,60.0),
]
cursor.executemany(
    "INSERT INTO mereni (cas, teplota, vlhkost) VALUES (?, ?, ?)",
    testovaci_data
)
conn.commit()
print(f"Vloženo {len(testovaci_data)} záznamů")

print("--- Všechna měření ---")
cursor.execute("SELECT * FROM mereni")
for radek in cursor.fetchall():
    print(radek)

conn.close()
print("\nHotovo! Soubor iot_data.db vytvořen")