import cv2
import yt_dlp
import numpy as np
import json


def capture_stream_snapshot(youtube_url, output_file="snapshot.jpg", toBuffer=False):
    # 1. Configure yt-dlp to get the direct stream URL
    ydl_opts = {
        "format": "best",
        "quiet": True,
        "no_warnings": True,
    }

    with yt_dlp.YoutubeDL(ydl_opts) as ydl:
        try:
            info = ydl.extract_info(youtube_url, download=False)
            stream_url = info["url"]
        except Exception as e:
            print(f"Error extracting info: {e}")
            return None

    # 2. Use OpenCV to capture a frame from the stream URL
    try:
        cap = cv2.VideoCapture(stream_url)
    except Exception as e:
        print(f"Error opening VideoCapture: {e}")
        return None

    if not cap.isOpened():
        print("Error: Could not open video stream.")
        return None if toBuffer else None

    # Read a single frame
    success, frame = cap.read()

    if success:
        if toBuffer:
            # Encode frame as JPEG to memory buffer
            ret, buf = cv2.imencode(".jpg", frame)
            if ret:
                print("Snapshot captured to buffer.")
                cap.release()
                return buf.tobytes()
            else:
                print("Error: Could not encode frame to buffer.")
                cap.release()
                return None
        else:
            # 3. Save the frame as an image
            cv2.imwrite(output_file, frame)
            print(f"Snapshot saved to {output_file}")
    else:
        print("Error: Could not read frame from stream.")

    # Cleanup
    cap.release()


# Shsf Handler
def main(args):
    route = args.get("route")
    if route == "snapshot":
        url = args.get("body", "")
        try:
            url = json.loads(url)
        except json.JSONDecodeError:
            print("Error: Invalid JSON input.")
            return {
                "_shsf": "v2",
                "_code": 400,
                "_res": {"message": "Invalid JSON input."},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        url = url.get("url", "")
        if not url:
            print("Error: URL not provided.")
            return {
                "_shsf": "v2",
                "_code": 400,
                "_res": {"message": "URL not provided."},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        
        try:
            capture_stream_snapshot(url, output_file="/tmp/snapshot.jpg")
            content = None
            with open("/tmp/snapshot.jpg", "rb") as f:
                content = f.read()
        except Exception as e:
            print(f"Error: {e}")
            return {
                "_shsf": "v2",
                "_code": 500,
                "_res": {"message": f"Could not capture snapshot: {str(e)}"},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        
        if content is None:
            print("Error: Could not capture snapshot.")
            return {
                "_shsf": "v2",
                "_code": 500,
                "_res": {"message": "Could not capture snapshot."},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        
        # Convert content to base64 for JSON response
        import base64
        encoded_content = base64.b64encode(content).decode('utf-8')
        
        return {
            "_shsf": "v2",
            "_code": 200,
            "_res": {
                "message": "done",
                "buffer": encoded_content
            },
            "_headers": {
                "Content-Type": "application/json",
            },
        }
    elif route == "health":
        return {
            "_shsf": "v2",
            "_code": 200,
            "_res": {"message": "Service is healthy."},
            "_headers": {
                "Content-Type": "application/json",
            },
        }
    elif route == "default": # UI Route
        try:
            content = ""
            with open("/app/ui.html", "r") as f:
                content = f.read()
        except FileNotFoundError:
            print("Error: /app/ui.html not found.")
            return {
                "_shsf": "v2",
                "_code": 404,
                "_res": {"message": "UI file not found."},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        except Exception as e:
            print(f"Error loading UI: {e}")
            return {
                "_shsf": "v2",
                "_code": 500,
                "_res": {"message": f"Server error: {str(e)}"},
                "_headers": {
                    "Content-Type": "application/json",
                },
            }
        return {
            "_shsf": "v2",
            "_code": 200,
            "_res": content,
            "_headers": {
                "Content-Type": "text/html",
            },
        }
        
if __name__ == "__main__":
    print("omg im on main")
    capture_stream_snapshot("https://www.youtube.com/watch?v=n15V_fCsl_c", output_file="snapshot.jpg")