import time

import docker
import httpx
from fastapi import APIRouter

from config import CC_CONNECT_URL, DOCKER_HOST

router = APIRouter()
client = docker.DockerClient(base_url=DOCKER_HOST, timeout=5)


def _get_cc_connect_container():
    matches = client.containers.list(all=True, filters={"name": "cc-connect"})
    return matches[0] if matches else None


@router.post("/start")
def start_cc_connect():
    try:
        container = _get_cc_connect_container()
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "container_status": None,
            "error": f"docker check failed: {exc}",
        }

    if not container:
        return {
            "ok": False,
            "status": "down",
            "container_status": "not_found",
            "error": "cc-connect container not found",
        }

    try:
        container.start()
        container.reload()
        container_status = container.status
        return {
            "ok": container_status == "running",
            "status": "up" if container_status == "running" else "down",
            "container_status": container_status,
            "error": None if container_status == "running" else "cc-connect failed to start",
        }
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "container_status": container.status,
            "error": f"docker start failed: {exc}",
        }


@router.post("/stop")
def stop_cc_connect():
    try:
        container = _get_cc_connect_container()
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "container_status": None,
            "error": f"docker check failed: {exc}",
        }

    if not container:
        return {
            "ok": False,
            "status": "down",
            "container_status": "not_found",
            "error": "cc-connect container not found",
        }

    try:
        container.stop()
        container.reload()
        container_status = container.status
        return {
            "ok": container_status != "running",
            "status": "down",
            "container_status": container_status,
            "error": None if container_status != "running" else "cc-connect failed to stop",
        }
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "container_status": container.status,
            "error": f"docker stop failed: {exc}",
        }


@router.get("/health")
async def cc_connect_health():
    url = (CC_CONNECT_URL or "").strip()

    container = None
    try:
        container = _get_cc_connect_container()
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "source": "docker",
            "container_name": None,
            "container_status": None,
            "endpoint": None,
            "http_status": None,
            "latency_ms": None,
            "error": f"docker check failed: {exc}",
        }

    container_name = container.name if container else None
    container_status = container.status if container else "not_found"
    container_up = container_status == "running"

    if not url:
        return {
            "ok": container_up,
            "status": "up" if container_up else "down",
            "source": "docker",
            "container_name": container_name,
            "container_status": container_status,
            "endpoint": None,
            "http_status": None,
            "latency_ms": None,
            "error": None if container_up else "cc-connect container is not running",
        }

    timeout = httpx.Timeout(2.0)
    started = time.perf_counter()
    try:
        async with httpx.AsyncClient(timeout=timeout) as http_client:
            response = await http_client.get(url)
        latency_ms = round((time.perf_counter() - started) * 1000, 1)

        if response.is_success and container_up:
            return {
                "ok": True,
                "status": "up",
                "source": "docker+http",
                "container_name": container_name,
                "container_status": container_status,
                "endpoint": url,
                "http_status": response.status_code,
                "latency_ms": latency_ms,
                "error": None,
            }

        if response.is_success and not container_up:
            return {
                "ok": False,
                "status": "down",
                "source": "docker+http",
                "container_name": container_name,
                "container_status": container_status,
                "endpoint": url,
                "http_status": response.status_code,
                "latency_ms": latency_ms,
                "error": "HTTP probe succeeded but cc-connect container is not running",
            }

        return {
            "ok": False,
            "status": "down",
            "source": "docker+http",
            "container_name": container_name,
            "container_status": container_status,
            "endpoint": url,
            "http_status": response.status_code,
            "latency_ms": latency_ms,
            "error": f"HTTP probe returned {response.status_code}",
        }
    except Exception as exc:
        return {
            "ok": False,
            "status": "down",
            "source": "docker+http",
            "container_name": container_name,
            "container_status": container_status,
            "endpoint": url,
            "http_status": None,
            "latency_ms": None,
            "error": str(exc),
        }