import time
import os
import json
import argparse
import imagehash
from PIL import Image
import win32gui
import win32process
import psutil
from mss import mss
from .utils import write_image_metadata
import win32api
import pywintypes
import ctypes
import ctypes.wintypes
from screeninfo import get_monitors

def get_monitor_info():
    return {monitor.name: monitor for monitor in get_monitors()}

def get_active_window_info():
    try:
        window = win32gui.GetForegroundWindow()
        _, pid = win32process.GetWindowThreadProcessId(window)
        app_name = psutil.Process(pid).name()
        window_title = win32gui.GetWindowText(window)
        return app_name, window_title
    except:
        return "", ""

def load_screen_sequences(base_dir, date):
    try:
        with open(os.path.join(base_dir, date, ".screen_sequences"), "r") as f:
            return json.load(f)
    except FileNotFoundError:
        return {}

def save_screen_sequences(base_dir, screen_sequences, date):
    with open(os.path.join(base_dir, date, ".screen_sequences"), "w") as f:
        json.dump(screen_sequences, f)
        f.flush()
        os.fsync(f.fileno())

def take_screenshot(base_dir, previous_hashes, threshold, screen_sequences, date, timestamp):
    screenshots = []
    app_name, window_title = get_active_window_info()

    # Create date directory
    os.makedirs(os.path.join(base_dir, date), exist_ok=True)
    worklog_path = os.path.join(base_dir, date, "worklog")

    monitor_infos = get_monitor_info()

    # Open worklog file
    with open(worklog_path, "a") as worklog:
        with mss() as sct:
            for i, monitor in enumerate(sct.monitors[1:], 1):  # Skip the first full-screen monitor
                monitor_name = monitor_infos.get(f"\\\\.\\DISPLAY{i}", f"screen_{i}").name
                safe_monitor_name = ''.join(c for c in monitor_name if c.isalnum() or c in ('_', '-'))
                print(f"Processing monitor: {safe_monitor_name}")  # Debug output
                
                jpeg_filename = os.path.join(base_dir, date, f"screenshot-{timestamp}-of-{safe_monitor_name}.jpg")
                
                screen = sct.grab(monitor)
                img = Image.frombytes("RGB", screen.size, screen.bgra, "raw", "BGRX")
                
                # Calculate hash of current screenshot
                current_hash = imagehash.phash(img)

                # Check if current screenshot is similar to the previous one
                if safe_monitor_name in previous_hashes and current_hash - previous_hashes[safe_monitor_name] < threshold:
                    print(f"Screenshot for {safe_monitor_name} is similar to the previous one. Skipping.")
                    worklog.write(
                        f"{timestamp} - {safe_monitor_name} - Skipped (similar to previous)\n"
                    )
                    continue

                # Update previous screenshot hash
                previous_hashes[safe_monitor_name] = current_hash

                # Update sequence number
                screen_sequences[safe_monitor_name] = screen_sequences.get(safe_monitor_name, 0) + 1

                # Prepare metadata
                metadata = {
                    "timestamp": timestamp,
                    "active_app": app_name,
                    "active_window": window_title,
                    "screen_name": safe_monitor_name,
                    "sequence": screen_sequences[safe_monitor_name],  # Add sequence number to metadata
                }

                # Save image and write metadata
                img.save(jpeg_filename, format="JPEG", quality=85)
                write_image_metadata(jpeg_filename, metadata)
                save_screen_sequences(base_dir, screen_sequences, date)

                screenshots.append(jpeg_filename)
                # Record successful screenshot
                worklog.write(f"{timestamp} - {safe_monitor_name} - Saved\n")

    return screenshots

def is_screen_locked():
    import ctypes
    user32 = ctypes.windll.User32
    return user32.GetForegroundWindow() == 0

def main():
    parser = argparse.ArgumentParser(description="Screen Recorder for Windows")
    parser.add_argument(
        "--threshold", type=int, default=4, help="Threshold for image similarity"
    )
    parser.add_argument(
        "--base-dir", type=str, default="~/tmp", help="Base directory for screenshots"
    )
    args = parser.parse_args()

    base_dir = os.path.expanduser(args.base_dir)
    previous_hashes = {}

    while True:
        try:
            if not is_screen_locked():
                date = time.strftime("%Y%m%d")
                timestamp = time.strftime("%Y%m%d-%H%M%S")
                screen_sequences = load_screen_sequences(base_dir, date)
                screenshot_files = take_screenshot(
                    base_dir,
                    previous_hashes,
                    args.threshold,
                    screen_sequences,
                    date,
                    timestamp,
                )
                for screenshot_file in screenshot_files:
                    print(f"Screenshot taken: {screenshot_file}")
            else:
                print("Screen is locked. Skipping screenshot.")
        except Exception as e:
            print(f"An error occurred: {str(e)}. Skipping this iteration.")

        time.sleep(5)

if __name__ == "__main__":
    main()