from __future__ import annotations

from fastapi import APIRouter, Depends
from sqlmodel import Session

from ..connectors.unraid import UnraidConnector
from ..db.session import get_session
from ..services.unraid_vm_service import request_vm_action, vm_capabilities
from .connector_runtime import load_connector_runtime

router = APIRouter(prefix='/api/unraid', dependencies=[Depends(load_connector_runtime)])


def _default_summary():
    return {
        'arrayStatus': 'stopped',
        'parityStatus': 'invalid',
        'cacheUsage': 0,
        'diskWarnings': 0,
        'uptime': 'unknown',
        'dockerService': False,
        'cpuUsage': 0,
        'ramUsage': 0,
    }


@router.get('/summary')
def summary():
    connector = UnraidConnector()
    data = _default_summary()
    if not connector.is_configured():
        return data

    server_info = connector.get_server_info()
    if server_info.get('status') == 'ok':
        info = server_info.get('info', {})
        data['uptime'] = str(info.get('uptime', 'unknown'))

    metrics = connector.get_system_metrics()
    if metrics.get('status') in {'ok', 'partial'}:
        if isinstance(metrics.get('cpuUsage'), int | float):
            data['cpuUsage'] = int(metrics.get('cpuUsage', 0))
        if isinstance(metrics.get('ramUsage'), int | float):
            data['ramUsage'] = int(metrics.get('ramUsage', 0))

    array_status = connector.get_array_status()
    if array_status.get('status') == 'ok':
        data['arrayStatus'] = str(array_status.get('arrayStatus', 'stopped'))

    disk_summary = connector.get_disk_warnings()
    if disk_summary.get('status') == 'ok':
        data['diskWarnings'] = int(disk_summary.get('diskWarnings', 0))

    cache_summary = connector.get_cache_status()
    if cache_summary.get('status') == 'ok':
        data['cacheUsage'] = int(cache_summary.get('cacheUsage', 0))

    parity_summary = connector.get_parity_status()
    if parity_summary.get('status') == 'ok':
        data['parityStatus'] = str(parity_summary.get('parityStatus', 'invalid'))

    docker_summary = connector.get_docker_service_status()
    if docker_summary.get('status') == 'ok':
        data['dockerService'] = bool(docker_summary.get('running', False))

    return data


@router.get('/array')
def array():
    result = UnraidConnector().get_array_status()
    if result.get('status') == 'ok':
        return {'status': result.get('arrayStatus', 'stopped')}
    if result.get('status') == 'missing_config':
        return {'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    return {'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}


@router.get('/disks')
def disks():
    result = UnraidConnector().get_disk_warnings()
    if result.get('status') == 'ok':
        return {'disks': result.get('disks', []), 'diskWarnings': result.get('diskWarnings', 0)}
    if result.get('status') == 'missing_config':
        return {'disks': [], 'diskWarnings': 0, 'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    return {'disks': [], 'diskWarnings': 0, 'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}


@router.get('/cache')
def cache():
    result = UnraidConnector().get_cache_status()
    if result.get('status') == 'ok':
        return {'cacheUsage': result.get('cacheUsage', 0), 'pools': result.get('pools', [])}
    if result.get('status') == 'missing_config':
        return {'cacheUsage': 0, 'pools': [], 'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    return {'cacheUsage': 0, 'pools': [], 'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}


@router.get('/parity')
def parity():
    result = UnraidConnector().get_parity_status()
    if result.get('status') == 'ok':
        return {
            'status': result.get('parityStatus', 'invalid'),
            'checkStatus': result.get('checkStatus', 'idle'),
            'running': bool(result.get('running', False)),
            'paused': bool(result.get('paused', False)),
            'correcting': bool(result.get('correcting', False)),
            'progress': result.get('progress'),
            'speed': result.get('speed'),
            'errors': int(result.get('errors', 0)),
        }
    if result.get('status') == 'missing_config':
        return {'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    return {'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}


@router.get('/docker')
def docker():
    result = UnraidConnector().get_docker_service_status()
    if result.get('status') == 'ok':
        return {
            'status': result.get('serviceStatus', 'stopped'),
            'running': result.get('running', False),
        }
    if result.get('status') == 'missing_config':
        return {'status': 'missing_config', 'running': False, 'reason': result.get('reason', 'missing_config')}
    return {'status': 'disconnected', 'running': False, 'reason': result.get('reason', 'connection_failed')}


@router.get('/vms')
def vms():
    result = UnraidConnector().get_vm_summary()
    if result.get('status') == 'ok':
        return {'vms': result.get('vms', [])}
    if result.get('status') == 'missing_config':
        return {'vms': [], 'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    if result.get('status') in {'unavailable', 'api_unavailable'}:
        return {'vms': [], 'status': result.get('status'), 'reason': result.get('reason', 'VM API unavailable')}
    return {'vms': [], 'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}


@router.get('/vms/capabilities')
def vms_capabilities(session: Session = Depends(get_session)):
    return vm_capabilities(session)


@router.post('/vms/{vm_id}/actions/{action}')
def run_vm_action(vm_id: str, action: str, payload: dict, session: Session = Depends(get_session)):
    return request_vm_action(
        session,
        vm_id=vm_id,
        action=action,
        source=str(payload.get('source') or 'manual'),
        confirmed=payload.get('confirm') is True,
    )


@router.get('/shares')
def shares():
    result = UnraidConnector().get_share_summary()
    if result.get('status') == 'ok':
        return {'shares': result.get('shares', [])}
    if result.get('status') == 'missing_config':
        return {'shares': [], 'status': 'missing_config', 'reason': result.get('reason', 'missing_config')}
    return {'shares': [], 'status': 'disconnected', 'reason': result.get('reason', 'connection_failed')}