import os
import sys
import gc
import machine
import ubinascii

def system_report():
    print("\n🛠️  YD-RP2040 System Utility Report")
    print("=" * 40)

    # CPU Info
    print("\n[📌] CPU Info:")
    print(f"    Platform        : {sys.platform}")
    print(f"    Frequency       : {machine.freq() / 1_000_000:.1f} MHz")

    # Unique ID
    try:
        uid = ubinascii.hexlify(machine.unique_id()).decode()
        print(f"    Unique ID       : {uid.upper()}")
    except Exception:
        print("    Unique ID       : Not available")

    # Temperature (ADC4 on RP2040)
    try:
        sensor_temp = machine.ADC(4)
        voltage = sensor_temp.read_u16() * 3.3 / 65535
        temperature = 27 - (voltage - 0.706) / 0.001721
        print(f"    MCU Temperature : {temperature:.2f} °C")
    except Exception as e:
        print(f"    MCU Temperature : Error ({e})")

    # Memory
    print("\n[💾] Memory Info:")
    gc.collect()
    print(f"    Free RAM        : {gc.mem_free()} bytes")
    print(f"    Allocated RAM   : {gc.mem_alloc()} bytes")

    # Filesystem
    print("\n[📁] Flash Filesystem (/):")
    try:
        fs = os.statvfs("/")
        total = fs[0] * fs[2]
        free = fs[0] * fs[3]
        used = total - free
        print(f"    Total           : {total / 1024:.1f} KB")
        print(f"    Used            : {used / 1024:.1f} KB")
        print(f"    Free            : {free / 1024:.1f} KB")

        print("\n[📂] Directory Listing:")
        for name in os.listdir("/"):
            try:
                stats = os.stat(name)
                size = stats[6]
                print(f"    {'<DIR>' if stats[0] & 0x4000 else '     '} {name:20} {size} bytes")
            except Exception:
                print(f"    [ERR] {name}")
    except Exception as e:
        print(f"    Filesystem check failed: {e}")

    # I2C Scan
    print("\n[🔎] I2C Bus Scan (GPIO0=SDA, GPIO1=SCL):")
    try:
        i2c = machine.I2C(0, scl=machine.Pin(1), sda=machine.Pin(0))
        devices = i2c.scan()
        if devices:
            for addr in devices:
                print(f"    Found I2C device at 0x{addr:02X}")
        else:
            print("    No I2C devices found.")
    except Exception as e:
        print(f"    I2C Scan failed: {e}")

    print("\n✅ System check complete.\n")

# Run immediately when script is executed
if __name__ == "__main__":
    system_report()