from datetime import datetime
from typing import Literal

from pydantic import BaseModel, Field, field_validator

from app.schemas.validators import normalize_required_text, validate_log_source


ServiceType = Literal["systemd", "docker"]
ServiceActionName = Literal["start", "stop", "restart"]
ServiceStatusName = Literal["running", "stopped", "unknown"]


class ManagedServiceCreate(BaseModel):
    name: str = Field(min_length=1, max_length=128)
    service_type: ServiceType = "systemd"
    control_enabled: bool = True
    log_source: str | None = Field(default=None, max_length=512)

    @field_validator("name")
    @classmethod
    def validate_name_value(cls, value: str) -> str:
        return normalize_required_text(value, field_name="name")

    @field_validator("log_source")
    @classmethod
    def validate_log_source_value(cls, value: str | None) -> str | None:
        return validate_log_source(value)


class ManagedServiceUpdate(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=128)
    service_type: ServiceType | None = None
    control_enabled: bool | None = None
    log_source: str | None = Field(default=None, max_length=512)

    @field_validator("name")
    @classmethod
    def validate_name_value(cls, value: str | None) -> str | None:
        if value is None:
            return None
        return normalize_required_text(value, field_name="name")

    @field_validator("log_source")
    @classmethod
    def validate_log_source_value(cls, value: str | None) -> str | None:
        return validate_log_source(value)


class ManagedServiceRead(BaseModel):
    id: int
    server_id: int
    name: str
    service_type: ServiceType
    control_enabled: bool
    log_source: str | None
    created_at: datetime
    status: ServiceStatusName
    last_checked_at: datetime
    detail: str | None = None

    model_config = {"from_attributes": True}