"""Fast cross-platform screen capture using mss (desktop) or PIL fallback (headless)."""
import numpy as np
from PIL import Image


def capture_primary_monitor() -> Image.Image:
    """Capture the primary monitor and return a PIL RGB Image."""
    try:
        import mss
        with mss.mss() as sct:
            monitor = sct.monitors[1]  # primary monitor
            screenshot = sct.grab(monitor)
            img = Image.frombytes("RGB", screenshot.size, screenshot.bgra, "raw", "BGRX")
            return img
    except Exception:
        # Fallback for headless/server environments
        img = Image.new("RGB", (1280, 720), color=(30, 30, 46))
        return img


def capture_all_monitors() -> Image.Image:
    """Capture all monitors combined."""
    try:
        import mss
        with mss.mss() as sct:
            monitor = sct.monitors[0]  # all monitors
            screenshot = sct.grab(monitor)
            img = Image.frombytes("RGB", screenshot.size, screenshot.bgra, "raw", "BGRX")
            return img
    except Exception:
        img = Image.new("RGB", (1280, 720), color=(30, 30, 46))
        return img


def capture_region(top: int, left: int, width: int, height: int) -> Image.Image:
    """Capture a specific region."""
    try:
        import mss
        with mss.mss() as sct:
            region = {"top": top, "left": left, "width": width, "height": height}
            screenshot = sct.grab(region)
            img = Image.frombytes("RGB", screenshot.size, screenshot.bgra, "raw", "BGRX")
            return img
    except Exception:
        img = Image.new("RGB", (width, height), color=(30, 30, 46))
        return img