#!/usr/bin/env python3
import re
import sys
import termios
import tty
from base64 import standard_b64encode
from io import BytesIO


def draw_to_terminal(buffer: BytesIO) -> None:
    write_chunked(a="T", i=1, f=100, q=2, data=buffer.getvalue())


def serialize_gr_command(**cmd) -> bytes:
    payload = cmd.pop("payload", None)
    cmd = ",".join(f"{k}={v}" for k, v in cmd.items())
    ans = []
    w = ans.append
    w(b"\033_G"), w(cmd.encode("ascii"))
    if payload:
        w(b";")
        w(payload)
    w(b"\033\\")
    return b"".join(ans)


def write_chunked(**cmd) -> None:
    data = standard_b64encode(cmd.pop("data"))
    while data:
        chunk, data = data[:4096], data[4096:]
        m = 1 if data else 0
        sys.stdout.buffer.write(serialize_gr_command(payload=chunk, m=m, **cmd))
        sys.stdout.flush()
        cmd.clear()


def hide_cursor() -> None:
    sys.stdout.write("\x1b[?25l")
    sys.stdout.flush()


def show_cursor() -> None:
    sys.stdout.write("\x1b[?25h")
    sys.stdout.flush()


def set_position(y: int, x: int) -> None:
    sys.stdout.write(f"\x1b[{y};{x}H")
    sys.stdout.flush()


def get_position() -> tuple[int, int]:
    # Save the current terminal settings
    fd = sys.stdin.fileno()
    old_settings = termios.tcgetattr(fd)

    try:
        # Set terminal to raw mode
        tty.setraw(fd)
        # Send the ESC[6n command to request cursor position
        sys.stdout.write("\x1b[6n")
        sys.stdout.flush()

        # Read the response: ESC [ row ; col R
        response = ""
        while True:
            ch = sys.stdin.read(1)
            response += ch
            if ch == "R":
                break

    finally:
        # Restore the terminal settings
        termios.tcsetattr(fd, termios.TCSANOW, old_settings)

    # Parse the response using regex
    match = re.search(r"\[(\d+);(\d+)R", response)
    if match:
        y, x = map(int, match.groups())
        return y, x
    else:
        raise ValueError("Failed to parse cursor position response")


if __name__ == "__main__":
    import pyvista as pv

    s = pv.Sphere()
    pl = pv.Plotter()
    pl.add_mesh(s)
    b = BytesIO()
    pl.show()
    pl.screenshot(b)
    # i = Image.new("RGB", (100, 100), (0, 0, 0))
    # d = ImageDraw.Draw(i)
    # d.ellipse([(5, 5), (95, 95)])
    # d.ellipse([(10, 10), (90, 90)])
    # d.line(((50, 0), (50, 100)))
    # d.line(((0, 50), (100, 50)))

    draw_to_terminal(b)