# Copyright (c) 2026 LightSeek Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

"""Port, socket, and host networking helpers."""

from __future__ import annotations

import logging
import os
import socket
import warnings

logger = logging.getLogger(__name__)


def is_port_available(port):
    """Return whether a port is available."""
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        try:
            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
            s.bind(("", port))
            s.listen(1)
            return True
        except OSError:
            return False
        except OverflowError:
            return False


def get_free_port():
    try:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.bind(("", 0))
            return s.getsockname()[1]
    except OSError:
        with socket.socket(socket.AF_INET6, socket.SOCK_STREAM) as s:
            s.bind(("", 0))
            return s.getsockname()[1]


def set_uvicorn_logging_configs():
    from uvicorn.config import LOGGING_CONFIG

    LOGGING_CONFIG["formatters"]["default"][
        "fmt"
    ] = "[%(asctime)s] %(levelprefix)s %(message)s"
    LOGGING_CONFIG["formatters"]["default"]["datefmt"] = "%Y-%m-%d %H:%M:%S"
    LOGGING_CONFIG["formatters"]["access"][
        "fmt"
    ] = '[%(asctime)s] %(levelprefix)s %(client_addr)s - "%(request_line)s" %(status_code)s'
    LOGGING_CONFIG["formatters"]["access"]["datefmt"] = "%Y-%m-%d %H:%M:%S"


def get_local_ip_by_remote() -> str | None:
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        s.connect(("8.8.8.8", 80))
        return s.getsockname()[0]
    except Exception:
        pass

    try:
        hostname = socket.gethostname()
        ip = socket.gethostbyname(hostname)
        if ip and ip != "127.0.0.1" and ip != "0.0.0.0":
            return ip
    except Exception:
        pass

    try:
        s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
        s.connect(("2001:4860:4860::8888", 80))
        return s.getsockname()[0]
    except Exception:
        raise ValueError("Can not get local ip")


def get_ip() -> str:
    from tokenspeed.runtime.utils.env import envs

    host_ip = envs.TOKENSPEED_HOST_IP.get() or os.getenv("HOST_IP", "")
    if host_ip:
        return host_ip

    try:
        hostname = socket.gethostname()
        ip = socket.gethostbyname(hostname)
        if ip and ip != "127.0.0.1" and ip != "0.0.0.0":
            return ip
    except Exception:
        pass

    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        s.connect(("8.8.8.8", 80))
        return s.getsockname()[0]
    except Exception:
        pass

    try:
        s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
        s.connect(("2001:4860:4860::8888", 80))
        return s.getsockname()[0]
    except Exception:
        pass

    warnings.warn(
        "Failed to get the IP address, using 0.0.0.0 by default."
        "The value can be set by the environment variable"
        " TOKENSPEED_HOST_IP or HOST_IP.",
        stacklevel=2,
    )
    return "0.0.0.0"