import os
import subprocess
from app_images import init_images_router
from app_files import init_files_router
from app_pods import init_pods_router
from app_containers import init_containers_router, start_stats_poller
from app_networks import init_networks_router
from fastapi import FastAPI, HTTPException
import requests_unixsocket
from common import (
    _podman_get_json as _common_podman_get_json,
    _systemctl as _common_systemctl,
)
import uvicorn

app = FastAPI(title="Podman MVP Control Plane", root_path="/api")
SESSION = requests_unixsocket.Session()
PODMAN_API_BASE = "http+unix://%2Frun%2Fuser%2F1000%2Fpodman%2Fpodman.sock/v5.4.2"
WORKLOADS_DIR = "/app/workloads"

@app.on_event("startup")
async def _startup_stats_poller():
    await start_stats_poller()

def _systemctl(cmd):
    return _common_systemctl(cmd, run)

def _run_systemctl_action(action: str, unit: str):
    cmd = ["systemctl", "--user", action, unit]
    return _systemctl(cmd)

@app.get("/health")
def health():
    podman_ok = False
    try:
        r = SESSION.get(f"{PODMAN_API_BASE}/libpod/info", timeout=2)
        if r.status_code == 200:
            try:
                r.json()
                podman_ok = True
            except Exception:
                podman_ok = False
    except Exception:
        podman_ok = False

    systemd_reachable = False
    try:
        res = subprocess.run(
            ["systemctl", "--user", "list-units", "--no-pager", "--no-legend"],
            capture_output=True,
            text=True,
            check=False,
            timeout=2,
        )
        systemd_reachable = (res.returncode == 0)
    except Exception:
        systemd_reachable = False

    ok = podman_ok and systemd_reachable
    return {"ok": ok, "podman": {"ok": podman_ok}, "systemd_user": {"reachable": systemd_reachable}}


# --- ROUTERS ---
# Images API lives in dedicated modules to keep this file from growing further.
app.include_router(init_images_router(SESSION, PODMAN_API_BASE))
app.include_router(init_files_router(SESSION, PODMAN_API_BASE, WORKLOADS_DIR))
app.include_router(init_networks_router(SESSION, PODMAN_API_BASE))
app.include_router(init_containers_router(
    SESSION,
    PODMAN_API_BASE,
    WORKLOADS_DIR,
    _systemctl,
))
app.include_router(init_pods_router(
    SESSION,
    PODMAN_API_BASE,
    WORKLOADS_DIR,
    _systemctl,
))


@app.get("/test-hybrid")
def test_hybrid():
    # 1. Check filesystem
    try:
        bestanden = []
        for root, _, files in os.walk(WORKLOADS_DIR):
            for f in files:
                bestanden.append(os.path.join(root, f))
    except Exception as e:
        bestanden = f"FS Fout: {str(e)}"

    # 2. Check Podman API
    try:
        api_containers = _common_podman_get_json(SESSION, f"{PODMAN_API_BASE}/libpod/containers/json?all=true")
    except Exception as e:
        api_containers = f"API Fout: {str(e)}"

    return {
        "bestanden_gevonden": bestanden if isinstance(bestanden, list) else [],
        "api_containers_aantal": len(api_containers) if isinstance(api_containers, list) else -1,
        "api_raw_sample": api_containers[0] if isinstance(api_containers, list) and api_containers else api_containers,
    }


@app.post("/daemon-reload")
def api_daemon_reload():
    try:
        code, out = _systemctl(["systemctl", "--user", "daemon-reload"])
        return {
            "cmd": "systemctl --user daemon-reload",
            "exit": code,
            "output": out,
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


@app.post("/{action}/{unit}")
def api_action(action: str, unit: str):
    if action not in ("status", "start", "stop", "restart"):
        raise HTTPException(status_code=400, detail="Invalid action")
    cmd = ["systemctl", "--user", action, unit]
    code, out = _run_systemctl_action(action, unit)
    return {"cmd": " ".join(cmd), "exit": code, "output": out}


@app.post("/api/<action>/<unit>")
def legacy_api_action(action: str, unit: str):
    # legacy flask-like path; keep behavior (even if not used by index.html)
    if action not in ("status", "start", "stop", "restart"):
        return {"error": "Invalid action"}, 400
    cmd = ["systemctl", "--user", action, unit]
    code, out = _run_systemctl_action(action, unit)
    return {"cmd": " ".join(cmd), "exit": code, "output": out}


def run(cmd):
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, check=False)
        output = (result.stdout or "") + (result.stderr or "")
        return result.returncode, output.strip()
    except Exception as e:
        return 1, str(e)

if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=8000)