ros_control/app/api/v1.py

import json
from datetime import date, datetime
from typing import Literal

from fastapi import APIRouter, Depends
from fastapi.responses import RedirectResponse
from pydantic import BaseModel, Field, field_validator

from app import ids, s3
from app.ros.operations import CHANNELS
from app.security import require_api_token
from app.services import backups, devices, events, groups, jobs, ops, settings

router = APIRouter(prefix="/api/v1", dependencies=[Depends(require_api_token)], tags=["api"])


class DeviceIn(BaseModel):
    name: str
    host: str
    port: int = 443
    username: str
    password: str
    verify_tls: bool = False
    use_tls: bool = True  # False = HTTP (сервис www, порт 80): пароль идёт открытым текстом
    group_id: str | None = None  # grp_…
    note: str | None = None


class DevicePatch(BaseModel):
    name: str | None = None
    host: str | None = None
    port: int | None = None
    username: str | None = None
    password: str | None = None
    verify_tls: bool | None = None
    use_tls: bool | None = None
    group_id: str | None = None  # grp_…; явный null — открепить от группы
    note: str | None = None  # пустая строка или null — очистить примечание


class DeviceOut(BaseModel):
    """Пароль устройства в ответы не попадает."""
    id: str  # dev_…
    name: str
    host: str
    port: int
    username: str
    verify_tls: bool
    use_tls: bool
    group_id: str | None
    note: str | None
    online: bool | None
    status: dict
    status_at: datetime | None
    last_error: str | None
    last_backup_requested_at: datetime | None

    @classmethod
    def of(cls, d) -> "DeviceOut":
        return cls(**{k: getattr(d, k) for k in cls.model_fields})


class JobOut(BaseModel):
    id: str  # job_…
    device_id: str | None
    device_name: str
    type: str
    status: str
    message: str
    created_at: datetime
    finished_at: datetime | None

    model_config = {"from_attributes": True}


class ChannelIn(BaseModel):
    channel: Literal[CHANNELS]  # type: ignore[valid-type]


class GroupIn(BaseModel):
    name: str


class GroupOut(BaseModel):
    id: str  # grp_…
    name: str
    device_count: int = 0


class BatchIn(BaseModel):
    """Устройства, над которыми выполняется операция: список id и/или целая группа."""
    device_ids: list[str] = Field(default_factory=list)  # dev_…
    group_id: str | None = None  # grp_…

    def resolve(self) -> list[str]:
        found = list(self.device_ids)
        if self.group_id is not None:
            groups.get_group(self.group_id)  # 404, если группы нет
            found += [d.id for d in devices.list_devices() if d.group_id == self.group_id]
        found = list(dict.fromkeys(found))
        if not found:
            raise ValueError("Не найдено ни одного устройства: укажите device_ids или непустую group_id")
        return found


class BatchChannelIn(BatchIn):
    channel: Literal[CHANNELS]  # type: ignore[valid-type]


# --- устройства ---

@router.get("/devices", response_model=list[DeviceOut])
async def list_devices(
    group: str = "",  # "" — все, "none" — без группы, иначе ID группы (grp_…)
    q: str = "",
    status: Literal["", "online", "offline"] = "",
    updates: Literal["", "ros", "fw", "any", "none"] = "",
    channel: str = "",
):
    found = devices.filter_devices(devices.list_devices(), group, q, status, updates, channel)
    return [DeviceOut.of(d) for d in found]


# --- группы ---

@router.get("/groups", response_model=list[GroupOut])
async def list_groups():
    return groups.list_groups()


@router.post("/groups", response_model=GroupOut, status_code=201)
async def create_group(body: GroupIn):
    g = groups.create_group(body.name)
    return GroupOut(id=g.id, name=g.name)


@router.patch("/groups/{group_id}", response_model=GroupOut)
async def rename_group(group_id: str, body: GroupIn):
    groups.rename_group(group_id, body.name)
    return next(g for g in groups.list_groups() if g["id"] == group_id)


@router.delete("/groups/{group_id}", status_code=204)
async def delete_group(group_id: str):
    groups.delete_group(group_id)


@router.post("/devices", response_model=DeviceOut, status_code=201)
async def create_device(body: DeviceIn):
    return DeviceOut.of(devices.create_device(**body.model_dump()))


@router.get("/devices/{device_id}", response_model=DeviceOut)
async def get_device(device_id: str):
    return DeviceOut.of(devices.get_device(device_id))


@router.patch("/devices/{device_id}", response_model=DeviceOut)
async def patch_device(device_id: str, body: DevicePatch):
    return DeviceOut.of(devices.update_device(device_id, **body.model_dump(exclude_unset=True)))


@router.delete("/devices/{device_id}", status_code=204)
async def delete_device(device_id: str):
    devices.delete_device(device_id)


@router.post("/devices/{device_id}/refresh", response_model=DeviceOut)
async def refresh_device(device_id: str):
    devices.get_device(device_id)
    await ops.refresh_status(device_id)
    return DeviceOut.of(devices.get_device(device_id))


@router.post("/devices/refresh", response_model=list[DeviceOut])
async def refresh_all():
    await ops.refresh_many()
    return [DeviceOut.of(d) for d in devices.list_devices()]


# --- операции (долгие — через jobs) ---

@router.post("/devices/{device_id}/backups", status_code=202)
async def create_backup(device_id: str):
    return {"job_ids": jobs.start_jobs("backup", [device_id])}


@router.put("/devices/{device_id}/update/channel", response_model=DeviceOut)
async def put_channel(device_id: str, body: ChannelIn):
    devices.get_device(device_id)
    await ops.set_channel(device_id, body.channel)
    return DeviceOut.of(devices.get_device(device_id))


@router.post("/devices/{device_id}/update/install", status_code=202)
async def install_update(device_id: str):
    return {"job_ids": jobs.start_jobs("ros_update", [device_id])}


@router.post("/devices/{device_id}/firmware/upgrade", status_code=202)
async def upgrade_firmware(device_id: str):
    return {"job_ids": jobs.start_jobs("fw_update", [device_id])}


@router.post("/batch/{action}", status_code=202)
async def batch(action: Literal["backup", "ros_update", "fw_update"], body: BatchIn):
    """Групповая операция над списком устройств."""
    return {"job_ids": jobs.start_jobs(action, body.resolve())}


@router.put("/batch/channel", status_code=202)
async def batch_channel(body: BatchChannelIn):
    """Групповая смена канала — фоновыми задачами (как /batch/{backup|ros_update|fw_update})."""
    return {"job_ids": jobs.start_jobs("set_channel", body.resolve(), {"channel": body.channel})}


# --- резервные копии в S3 ---

@router.get("/backups")
async def list_backups(
    device_id: str | None = None,
    group: str = "",  # "" — все, "none" — без группы, иначе ID группы (grp_…)
    kind: Literal["", "backup", "rsc"] = "",
    date_from: date | None = None,
    date_to: date | None = None,
    q: str = "",
):
    name = devices.get_device(device_id).name if device_id else ""
    return await backups.list_backups(name, group, kind, date_from, date_to, q)


@router.get("/backups/download")
async def download_backup(key: str):
    if not s3.key_allowed(key):
        raise ValueError("Недопустимый ключ")
    return RedirectResponse(s3.presign_get(key))


class KeysIn(BaseModel):
    keys: list[str] = Field(min_length=1)


@router.post("/backups/delete")
async def delete_backups(body: KeysIn):
    """Групповое удаление файлов из бакета: {"keys": [...]}."""
    deleted, failed = await backups.delete_many(body.keys)
    return {"deleted": deleted, "failed": failed}


@router.delete("/backups", status_code=204)
async def delete_backup(key: str):
    deleted, failed = await backups.delete_many([key])
    if failed:
        raise RuntimeError("Не удалось удалить файл из бакета")


# --- журнал событий ---

class EventOut(BaseModel):
    id: str  # evt_…
    ts: datetime
    type: str
    entity_type: str
    entity_id: str | None
    device_id: str | None
    job_id: str | None
    actor: str
    message: str
    data: dict | None = None

    model_config = {"from_attributes": True}

    @field_validator("data", mode="before")
    @classmethod
    def _parse(cls, v):
        return json.loads(v) if isinstance(v, str) else v


class JournalSettingsIn(BaseModel):
    retention_days: int  # 0 — без ограничения по сроку
    max_rows: int  # 0 — без ограничения по числу записей


@router.get("/events/settings")
async def get_journal_settings():
    """Настройки ротации журнала и сводка (число записей, самая старая запись)."""
    return {**settings.journal(), **events.stats()}


@router.put("/events/settings")
async def put_journal_settings(body: JournalSettingsIn):
    """Сохраняет настройки ротации и сразу применяет ротацию. Очистки журнала через API нет — она выполняется
    только в UI через окно с вводом пароля пользователя."""
    return {**settings.save_journal(body.retention_days, body.max_rows), **events.stats()}


@router.get("/events", response_model=list[EventOut])
async def list_events(entity_id: str | None = None, type: str | None = None, device_id: str | None = None,
                      job_id: str | None = None, actor: str | None = None, date_from: date | None = None,
                      date_to: date | None = None, q: str | None = None, before: str | None = None, limit: int = 100):
    """Журнал событий, новые сверху. type — точный тип (device.created) или группа (device, job, backup);
    actor — ui, api, poller, system или anonymous. Постранично: before=<ID последней записи предыдущей страницы>."""
    return events.list_events(entity_id=entity_id, type_=type, device_id=device_id, job_id=job_id, actor=actor,
                              date_from=date_from, date_to=date_to, text=q, before=before, limit=limit)


@router.get("/events/{event_id}", response_model=EventOut)
async def get_event(event_id: str):
    ids.check(event_id, "evt")
    return events.get_event(event_id)


# --- задачи ---

@router.get("/jobs", response_model=list[JobOut])
async def list_jobs():
    return jobs.list_jobs()


@router.get("/jobs/{job_id}", response_model=JobOut)
async def get_job(job_id: str):
    return jobs.get_job(job_id)