"""Asterisk deployment profiles, connect playbooks, and diagnostics."""
from __future__ import annotations

import json
import os
import shlex
from typing import Awaitable, Callable

from app.agent.device_connect import ssh_connect_args
from app.agent.tool_runner import invoke_connect, invoke_tool
from app.services.asterisk_baseline import (
    compare_against_baseline,
    config_paths_for_profile,
    config_root_for_profile,
    profile_for_catalog,
)

# Only one Asterisk slot allowed per vessel.
ASTERISK_CATALOG_KEYS = frozenset({"asterisk", "asterisk_geneseasx", "asterisk_satbox"})

GENESEASX_KEYS = frozenset({"asterisk", "asterisk_geneseasx"})
SATBOX_KEYS = frozenset({"asterisk_satbox"})

EmitFn = Callable[[int, str, str, dict | None], Awaitable[None]]


def asterisk_container_name(catalog_key: str | None) -> str:
    """Docker container name for GeneseasX Asterisk (default: voip)."""
    if catalog_key not in GENESEASX_KEYS:
        return ""
    return (
        os.environ.get("DEVICE_ASTERISK_GENESEASX_CONTAINER", "").strip()
        or os.environ.get("DEVICE_ASTERISK_CONTAINER", "").strip()
        or "voip"
    )


def _ssh_connect(ctx: dict) -> dict:
    port = ctx.get("port")
    if port is None:
        port_raw = os.environ.get("DEVICE_ASTERISK_GENESEASX_PORT", "").strip()
        port = int(port_raw) if port_raw.isdigit() else 6022
    return ssh_connect_args({**ctx, "port": port})


def _docker_asterisk(command: str):
    def builder(c: dict) -> dict:
        container = c.get("asterisk_container") or asterisk_container_name(c.get("catalog_key")) or "voip"
        return {"command": f"docker exec {container} asterisk -rx {shlex.quote(command)}"}

    return builder


def _docker_cat_config(relative_path: str, *, config_root: str = "/etc/asterisk"):
    def builder(c: dict) -> dict:
        container = c.get("asterisk_container") or asterisk_container_name(c.get("catalog_key")) or "voip"
        full = f"{config_root.rstrip('/')}/{relative_path.lstrip('/')}"
        return {
            "command": (
                f"docker exec {shlex.quote(container)} cat {shlex.quote(full)} 2>/dev/null "
                f"|| echo '__MISSING__'"
            )
        }

    return builder


def _asterisk_cli(command: str):
    return lambda c: {"command": f'asterisk -rx "{command}"'}


def _baseline_device_ctx(device: dict, vessel_context: dict | None) -> dict:
    ctx = dict(vessel_context or {})
    meta = device.get("metadata") or device.get("baseline_vars") or {}
    if isinstance(meta, dict):
        ctx.update({k: v for k, v in meta.items() if v is not None})
    return ctx


# Native Debian host diagnostics (TMGeneseas / satbox) via SSH.
SATBOX_ASTERISK_DIAGNOSTICS = [
    ("ssh_run", _asterisk_cli("pjsip show registrations")),
    ("ssh_run", _asterisk_cli("pjsip show endpoints")),
    ("ssh_run", _asterisk_cli("core show channels")),
    ("ssh_run", lambda c: {"command": "tail -n 100 /var/log/asterisk/full 2>/dev/null || journalctl -u asterisk -n 100 --no-pager 2>/dev/null || true"}),
]

# GeneseasX: SSH to Docker VM, docker exec into voip (password auth via ssh-generic-mcp).
GENESEASX_ASTERISK_DIAGNOSTICS = [
    ("ssh_run", _docker_asterisk("pjsip show registrations")),
    ("ssh_run", _docker_asterisk("pjsip show endpoints")),
    ("ssh_run", _docker_asterisk("core show channels")),
    ("ssh_run", lambda c: {
        "command": (
            f"docker logs --tail 100 {shlex.quote(c.get('asterisk_container') or 'voip')} 2>&1 | tail -100"
        )
    }),
]

ASTERISK_PLAYBOOKS: dict[str, dict] = {
    "asterisk_geneseasx": {
        "mcp_server": "ssh-generic-mcp",
        "connect": ("ssh_connect", _ssh_connect),
        "diagnostics": GENESEASX_ASTERISK_DIAGNOSTICS,
    },
    "asterisk": {
        "mcp_server": "ssh-generic-mcp",
        "connect": ("ssh_connect", _ssh_connect),
        "diagnostics": GENESEASX_ASTERISK_DIAGNOSTICS,
    },
    "asterisk_satbox": {
        "mcp_server": "ssh-generic-mcp",
        "connect": ("ssh_connect", _ssh_connect),
        "diagnostics": SATBOX_ASTERISK_DIAGNOSTICS,
    },
}


async def run_asterisk_diagnostics(
    task_id: int,
    device: dict,
    manager,
    emit: EmitFn,
    *,
    title: str = "",
    issue: str = "",
    vessel_context: dict | None = None,
    max_diagnostics: int = 8,
) -> list[dict]:
    """Connect to Asterisk (GeneseasX or satbox) and run CLI + config baseline checks."""
    catalog_key = device.get("catalog_key") or ""
    pb = ASTERISK_PLAYBOOKS.get(catalog_key)
    if not pb:
        pb = ASTERISK_PLAYBOOKS.get("asterisk_geneseasx")
    if not pb:
        return []

    results: list[dict] = []
    label = catalog_key or device.get("name") or "asterisk"
    server = pb["mcp_server"]

    server_state = manager.servers.get(server or "")
    if not server or not server_state or server_state.status != "loaded":
        await emit(
            task_id,
            "diagnose",
            f"MCP '{server}' not available for {label}.",
            {"device": label, "server": server},
        )
        return results

    profile = profile_for_catalog(catalog_key)
    intent = "voip + config baseline" if profile else "voip health"

    await emit(
        task_id,
        "connect",
        f"Connecting to {label} via {server} ({intent})...",
        {"device": label, "intent": intent, "baseline_profile": profile},
    )

    connect = pb.get("connect")
    if connect:
        tool, builder = connect
        ok = await invoke_connect(task_id, label, server, tool, builder(device), manager, emit)
        if not ok:
            return results

    for tool, builder in pb["diagnostics"][:max_diagnostics]:
        args = builder(device)
        res, tool_ok = await invoke_tool(
            task_id,
            label,
            server,
            tool,
            args,
            manager,
            emit,
            task_title=title,
            task_issue=issue,
        )
        results.append(
            {
                "device": label,
                "tool": tool,
                "ok": tool_ok,
                "output": res.get("text", ""),
                "intent": intent,
            }
        )

    if profile:
        baseline_result = await _run_config_baseline(
            task_id,
            device,
            manager,
            emit,
            profile=profile,
            label=label,
            server=server,
            title=title,
            issue=issue,
            vessel_context=vessel_context,
        )
        if baseline_result:
            results.append(baseline_result)

    return results


async def _run_config_baseline(
    task_id: int,
    device: dict,
    manager,
    emit: EmitFn,
    *,
    profile: str,
    label: str,
    server: str,
    title: str,
    issue: str,
    vessel_context: dict | None,
) -> dict | None:
    paths = config_paths_for_profile(profile)
    if not paths:
        return None

    config_root = config_root_for_profile(profile)
    live_files: dict[str, str] = {}

    await emit(
        task_id,
        "diagnose",
        f"Fetching Asterisk config files for baseline ({profile})…",
        {"device": label, "profile": profile, "files": paths},
    )

    for path in paths:
        args = _docker_cat_config(path, config_root=config_root)(device)
        res, ok = await invoke_tool(
            task_id,
            label,
            server,
            "ssh_run",
            args,
            manager,
            emit,
            task_title=title,
            task_issue=issue,
        )
        live_files[path] = res.get("text", "") if ok else "__MISSING__"

    report = compare_against_baseline(
        live_files,
        profile=profile,
        device_ctx=_baseline_device_ctx(device, vessel_context),
    )
    if not report:
        return None

    payload = report.as_dict()
    summary = report.summary
    await emit(
        task_id,
        "diagnose",
        summary,
        {"device": label, "baseline": payload},
    )

    return {
        "device": label,
        "tool": "asterisk_config_baseline",
        "ok": report.ok,
        "output": json.dumps(payload, indent=2),
        "intent": "config baseline",
        "baseline": payload,
    }