#!/usr/bin/env python3
"""Simple test example for PyPCF8523 RTC driver.

This example demonstrates basic usage of the PCF8523 RTC:
- Reading the current time
- Setting the time
- Checking power loss status

Hardware setup:
- Connect PCF8523 to Raspberry Pi I2C bus 1
- VCC -> 3.3V, GND -> GND, SDA -> GPIO2, SCL -> GPIO3
"""

import time
from pypcf8523 import PCF8523

# Days of the week for display
DAYS = ("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday")


def main():
    # Initialize the RTC on I2C bus 1
    print("Initializing PCF8523 RTC...")
    rtc = PCF8523(i2c_bus=1)

    # Check if the RTC lost power
    if rtc.lost_power:
        print("WARNING: RTC lost power. Setting time to system time...")

        # Set the RTC to the current system time
        # In a real application, you might want to sync with NTP first
        current_time = time.localtime()
        rtc.datetime = current_time
        print(f"Time set to: {time.strftime('%Y-%m-%d %H:%M:%S', current_time)}")
    else:
        print("RTC power OK")

    # To manually set the time, uncomment and modify this section:
    # ================================================================
    # import time
    # # Set to a specific time: 2025-11-09 15:30:00 (Saturday)
    # set_time = time.struct_time((2025, 11, 9, 15, 30, 0, 5, -1, -1))
    # rtc.datetime = set_time
    # print(f"Time manually set to: {time.strftime('%Y-%m-%d %H:%M:%S', set_time)}")
    # ================================================================

    print("\nReading time from RTC (Press Ctrl+C to stop):")
    print("-" * 50)

    try:
        while True:
            # Read the current time from the RTC
            current = rtc.datetime

            # Format and display the time
            day_name = DAYS[current.tm_wday]
            time_str = (f"{day_name} "
                       f"{current.tm_year}/{current.tm_mon:02d}/{current.tm_mday:02d} "
                       f"{current.tm_hour:02d}:{current.tm_min:02d}:{current.tm_sec:02d}")

            print(time_str)

            # Wait one second before next read
            time.sleep(1.0)

    except KeyboardInterrupt:
        print("\n\nTest stopped by user")
    finally:
        # Clean up
        rtc.close()
        print("RTC connection closed")


if __name__ == "__main__":
    main()