from typing import Any, Dict

from fastapi import APIRouter, HTTPException
from sqlmodel import Session, select

from core.database import engine, get_session
from core.settings import DATABASE_ENGINE, PANEL_ACCESS_PASSWORD, REDIS_ENABLED, REDIS_PREFIX, REDIS_URL
from core.utils import _get_default_system_timezone
from models.bot import BotInstance
from schemas.system import PanelLoginRequest, SystemTemplatesUpdateRequest
from core.cache import cache
from services.platform_service import get_platform_settings_snapshot, get_speech_runtime_settings
from services.template_service import (
    get_agent_md_templates,
    get_topic_presets,
    update_agent_md_templates,
    update_topic_presets,
)

router = APIRouter()


@router.get("/api/panel/auth/status")
def get_panel_auth_status():
    configured = str(PANEL_ACCESS_PASSWORD or "").strip()
    return {"enabled": bool(configured)}

@router.post("/api/panel/auth/login")
def panel_login(payload: PanelLoginRequest):
    configured = str(PANEL_ACCESS_PASSWORD or "").strip()
    if not configured:
        return {"success": True, "enabled": False}
    supplied = str(payload.password or "").strip()
    if supplied != configured:
        raise HTTPException(status_code=401, detail="Invalid panel access password")
    return {"success": True, "enabled": True}

@router.get("/api/system/defaults")
def get_system_defaults():
    md_templates = get_agent_md_templates()
    platform_settings = get_platform_settings_snapshot()
    speech_settings = get_speech_runtime_settings()
    return {
        "templates": md_templates,
        "limits": {
            "upload_max_mb": platform_settings.upload_max_mb,
        },
        "workspace": {
            "download_extensions": list(platform_settings.workspace_download_extensions),
            "allowed_attachment_extensions": list(platform_settings.allowed_attachment_extensions),
        },
        "bot": {
            "system_timezone": _get_default_system_timezone(),
        },
        "chat": {
            "pull_page_size": platform_settings.chat_pull_page_size,
            "page_size": platform_settings.page_size,
            "command_auto_unlock_seconds": platform_settings.command_auto_unlock_seconds,
        },
        "topic_presets": get_topic_presets().get("presets", []),
        "speech": {
            "enabled": speech_settings["enabled"],
            "model": speech_settings["model"],
            "device": speech_settings["device"],
            "max_audio_seconds": speech_settings["max_audio_seconds"],
            "default_language": speech_settings["default_language"],
        },
    }

@router.get("/api/system/templates")
def get_system_templates():
    return {
        "agent_md_templates": get_agent_md_templates(),
        "topic_presets": get_topic_presets(),
    }

@router.put("/api/system/templates")
def update_system_templates(payload: SystemTemplatesUpdateRequest):
    if payload.agent_md_templates is not None:
        update_agent_md_templates(payload.agent_md_templates.model_dump())

    if payload.topic_presets is not None:
        try:
            update_topic_presets(payload.topic_presets)
        except ValueError as exc:
            raise HTTPException(status_code=400, detail=str(exc)) from exc

    return {
        "status": "ok",
        "agent_md_templates": get_agent_md_templates(),
        "topic_presets": get_topic_presets(),
    }

@router.get("/api/health")
def get_health():
    try:
        with Session(engine) as session:
            session.exec(select(BotInstance).limit(1)).first()
        return {"status": "ok", "database": DATABASE_ENGINE}
    except Exception as e:
        raise HTTPException(status_code=503, detail=f"database check failed: {e}")

@router.get("/api/health/cache")
def get_cache_health():
    redis_url = str(REDIS_URL or "").strip()
    configured = bool(REDIS_ENABLED and redis_url)
    client_enabled = bool(getattr(cache, "enabled", False))
    reachable = bool(cache.ping()) if client_enabled else False
    status = "ok"
    if configured and not reachable:
        status = "degraded"
    return {
        "status": status,
        "cache": {
            "configured": configured,
            "enabled": client_enabled,
            "reachable": reachable,
            "prefix": REDIS_PREFIX,
        },
    }