#!/usr/bin/env python3

import kitty

import pyvista as pv
import numpy as np
import math
import subprocess
import re
import requests
import argparse
import asyncio
import os
import IP2Location

from terminalplotter import TerminalPlotter

# TODO: Color arches based on latency
# TODO: Text info (num hops etc.)
# TODO: Mouse support
# DONE: Interactive globe (spin w/ keys)
# DONE: Image spacing
# DONE: Async rendering?

EXAMPLE_ROUTE = [
    (47.996, 7.849),  # freiburg
    (50.110, 8.682),  # ffm
    (52.231, 21.006),  # warsaw
    (12.988, 77.622),  # bangalore
    (22.350, 114.184),  # hong kong
    (-33.869, 151.208),  # sydney
]


# Convert lat/lon to Cartesian coordinates
def latlon_to_xyz(lat: float, lon: float, radius=1.0):
    lat_rad = np.radians(lat)
    lon_rad = np.radians(lon)
    x = radius * np.cos(lat_rad) * np.cos(lon_rad)
    y = radius * np.cos(lat_rad) * np.sin(lon_rad)
    z = radius * np.sin(lat_rad)
    return np.array([x, y, z])


# Create an arch between two 3D points
def generate_arch(p1, p2, height_factor=0.2, n_points=100):
    # Normalize input points to lie on the unit sphere
    p1 = p1 / np.linalg.norm(p1)
    p2 = p2 / np.linalg.norm(p2)

    # Compute angle between p1 and p2
    omega = np.arccos(np.clip(np.dot(p1, p2), -1, 1))
    if omega == 0:
        return np.tile(p1, (n_points, 1))  # degenerate case

    t = np.linspace(0, 1, n_points)
    sin_omega = np.sin(omega)

    # Spherical linear interpolation (slerp)
    arch_points = (
        np.sin((1 - t)[:, None] * omega) * p1[None, :]
        + np.sin(t[:, None] * omega) * p2[None, :]
    ) / sin_omega

    # Add radial height offset based on sine curve
    heights = 1 + np.sin(np.pi * t) * height_factor
    arch_points *= heights[:, None]  # Scale outward from center

    return arch_points


def traceroute(target: str) -> list[tuple[int, int]]:
    database = IP2Location.IP2Location("IP2LOCATION-LITE-DB5.BIN", "SHARED_MEMORY")

    # Run traceroute command
    result = subprocess.run(
        ["traceroute", "-n", target, "-q", "1", "-w", "1,3,10"],
        capture_output=True,
        text=True,
    )
    hops: list[str] = re.findall(r"\n\s*\d+\s+([\d.]+)", result.stdout)

    coords: list[tuple[int, int]] = []
    for ip in hops:
        if ip.startswith(
            (
                "10.",
                "127.",
                "169.254.",
                "172.16.",
                "172.17.",
                "172.18.",
                "172.19.",
                "172.20.",
                "172.21.",
                "172.22.",
                "172.23.",
                "172.24.",
                "172.25.",
                "172.26.",
                "172.27.",
                "172.28.",
                "172.29.",
                "172.30.",
                "172.30.",
                "192.168.",
            )
        ):
            # exclude common local network addreses
            continue
        info = database.get_all(ip)
        coords.append((float(info.latitude), float(info.longitude)))
    return coords


async def main():

    parser = argparse.ArgumentParser(
        prog="kglobe",
        description="Traceroute on a globe",
        epilog="Requires kitty graphics protocol support in terminal",
    )
    parser.add_argument("-t", "--traceroute", default=None)
    parser.add_argument("--example", action="store_true")
    parser.add_argument("-s", "--size", nargs=2, type=int, help="width x height in px")
    args = parser.parse_args()

    locations = []
    if args.traceroute:
        locations = traceroute(args.traceroute)

    globe = pv.Sphere(
        radius=1.0,
        theta_resolution=60,
        phi_resolution=60,
        start_theta=270.001,
        end_theta=270,
    )

    tex = pv.examples.load_globe_texture()
    globe.active_texture_coordinates = np.zeros((globe.points.shape[0], 2))
    globe.active_texture_coordinates[:, 0] = 0.5 + np.arctan2(
        globe.points[:, 1], globe.points[:, 0]
    ) / (2 * math.pi)
    globe.active_texture_coordinates[:, 1] = (
        0.5 + np.arcsin(globe.points[:, 2]) / math.pi
    )

    # Convert to 3D coordinates
    if args.example:
        points_3d = [latlon_to_xyz(lat, lon) for lat, lon in EXAMPLE_ROUTE]
    else:
        points_3d = [latlon_to_xyz(lat, lon) for lat, lon in locations]

    if args.size:
        width, height = args.size
    else:
        height, width = await kitty.get_terminal_size_pixel()
    plotter = TerminalPlotter(width, height)
    plotter.add_mesh(
        globe, color="tan", smooth_shading=False, texture=tex, show_edges=False
    )

    for point in points_3d:
        city_marker = pv.Sphere(center=point, radius=0.02)
        plotter.add_mesh(city_marker, color="blue")

    labels = [str(_) for _ in range(len(points_3d))]
    raised_points = [point * 1.1 for point in points_3d]
    if raised_points:
        plotter.add_point_labels(raised_points, labels, point_size=0, font_size=14)

    for i in range(len(points_3d[:-1])):
        arch = generate_arch(points_3d[i], points_3d[i + 1], height_factor=0.2)
        line = pv.lines_from_points(arch, close=False)
        plotter.add_mesh(line, color="red", line_width=2)

    kitty.hide_cursor()
    try:
        await plotter.run()
    finally:
        kitty.show_cursor()


if __name__ == "__main__":
    asyncio.run(main())