from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, Field


class AssetCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    asset_type: str = Field(min_length=1, max_length=64)
    address: str | None = Field(default=None, max_length=255)
    metadata: dict[str, Any] = Field(default_factory=dict)


class AssetUpdate(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=160)
    asset_type: str | None = Field(default=None, min_length=1, max_length=64)
    address: str | None = Field(default=None, max_length=255)
    status: str | None = Field(default=None, max_length=32)
    metadata: dict[str, Any] | None = None


class AssetRead(AssetCreate):
    id: int
    status: str
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class MonitorCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    monitor_type: str = Field(default="http", max_length=64)
    target: str = Field(min_length=1, max_length=512)
    asset_id: int | None = None
    config: dict[str, Any] = Field(default_factory=dict)
    interval_seconds: int = Field(default=60, ge=10)


class MonitorUpdate(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=160)
    monitor_type: str | None = Field(default=None, max_length=64)
    target: str | None = Field(default=None, min_length=1, max_length=512)
    asset_id: int | None = None
    config: dict[str, Any] | None = None
    interval_seconds: int | None = Field(default=None, ge=10)
    status: str | None = Field(default=None, max_length=32)


class MonitorRead(MonitorCreate):
    id: int
    status: str
    last_checked_at: datetime | None
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class WebsiteMonitorCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    url: str = Field(min_length=1, max_length=512)
    asset_id: int | None = None
    expected_status: int = Field(default=200, ge=100, le=599)
    expected_text: str | None = None
    unexpected_text: str | None = None
    timeout_seconds: int = Field(default=10, ge=1, le=120)
    check_tls_expiry: bool = False
    tls_warning_days: int = Field(default=30, ge=1, le=365)
    interval_seconds: int = Field(default=60, ge=10)
    create_asset: bool = True
    alert_enabled: bool = True
    alert_severity: str = "critical"
    failure_threshold: int = Field(default=3, ge=1, le=20)


class PingMonitorCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    host: str = Field(min_length=1, max_length=255)
    asset_id: int | None = None
    timeout_seconds: int = Field(default=5, ge=1, le=60)
    interval_seconds: int = Field(default=60, ge=10)
    create_asset: bool = True
    alert_enabled: bool = True
    alert_severity: str = "warning"
    failure_threshold: int = Field(default=3, ge=1, le=20)


class TcpMonitorCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    host: str = Field(min_length=1, max_length=255)
    port: int = Field(ge=1, le=65535)
    asset_id: int | None = None
    timeout_seconds: int = Field(default=5, ge=1, le=60)
    interval_seconds: int = Field(default=60, ge=10)
    create_asset: bool = True
    alert_enabled: bool = True
    alert_severity: str = "warning"
    failure_threshold: int = Field(default=3, ge=1, le=20)


class CheckResultRead(BaseModel):
    id: int
    monitor_id: int
    status: str
    response_time_ms: int | None
    message: str | None
    observed_at: datetime

    model_config = {"from_attributes": True}


class AlertRuleCreate(BaseModel):
    monitor_id: int
    name: str = Field(min_length=1, max_length=160)
    severity: str = "warning"
    condition: dict[str, Any] = Field(default_factory=dict)
    failure_threshold: int = Field(default=3, ge=1)
    cooldown_seconds: int = Field(default=300, ge=0)
    is_enabled: bool = True


class AlertRuleUpdate(BaseModel):
    monitor_id: int | None = None
    name: str | None = Field(default=None, min_length=1, max_length=160)
    severity: str | None = None
    condition: dict[str, Any] | None = None
    failure_threshold: int | None = Field(default=None, ge=1)
    cooldown_seconds: int | None = Field(default=None, ge=0)
    is_enabled: bool | None = None


class AlertRuleRead(AlertRuleCreate):
    id: int
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class IncidentRead(BaseModel):
    id: int
    asset_id: int | None
    monitor_id: int | None
    alert_rule_id: int | None
    title: str
    severity: str
    status: str
    opened_at: datetime
    resolved_at: datetime | None
    acknowledged_at: datetime | None
    silenced_until: datetime | None
    details: dict[str, Any]

    model_config = {"from_attributes": True}


class NotificationChannelCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    channel_type: str = Field(min_length=1, max_length=64)
    settings: dict[str, Any] = Field(default_factory=dict)
    secret: str | None = None
    is_enabled: bool = True


class NotificationChannelUpdate(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=160)
    channel_type: str | None = Field(default=None, min_length=1, max_length=64)
    settings: dict[str, Any] | None = None
    secret: str | None = None
    is_enabled: bool | None = None


class NotificationChannelRead(BaseModel):
    id: int
    name: str
    channel_type: str
    settings: dict[str, Any]
    has_secret: bool
    is_enabled: bool
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class SnmpCredentialProfileCreate(BaseModel):
    name: str = Field(min_length=1, max_length=160)
    version: Literal["2c"] = "2c"
    community: str = Field(min_length=1, max_length=255)
    port: int = Field(default=161, ge=1, le=65535)
    timeout_seconds: int = Field(default=5, ge=1, le=120)
    retries: int = Field(default=1, ge=0, le=10)


class SnmpCredentialProfileUpdate(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=160)
    version: Literal["2c"] | None = None
    community: str | None = Field(default=None, min_length=1, max_length=255)
    port: int | None = Field(default=None, ge=1, le=65535)
    timeout_seconds: int | None = Field(default=None, ge=1, le=120)
    retries: int | None = Field(default=None, ge=0, le=10)


class SnmpCredentialProfileRead(BaseModel):
    id: int
    name: str
    credential_type: str
    version: str
    port: int
    timeout_seconds: int
    retries: int
    has_secret: bool
    created_at: datetime
    updated_at: datetime


class SnmpDiscoveryRequest(BaseModel):
    host: str = Field(min_length=1, max_length=255)
    credential_profile_id: int


class SnmpDiscoveredInterfaceRead(BaseModel):
    index: int
    name: str
    description: str | None
    admin_status: str | None
    oper_status: str | None
    speed_bps: int | None


class SnmpDiscoveryItemRead(BaseModel):
    item_id: str
    item_type: str
    group: str
    label: str
    unit: str | None = None


class SnmpMonitorsCreate(BaseModel):
    host: str = Field(min_length=1, max_length=255)
    asset_id: int
    credential_profile_id: int
    selected_items: list[SnmpDiscoveryItemRead] = Field(min_length=1)
    interval_seconds: int = Field(default=60, ge=10)


class SnmpDiscoveryRead(BaseModel):
    host: str
    credential_profile_id: int
    device_name: str | None
    description: str | None
    uptime_seconds: int | None
    interfaces: list[SnmpDiscoveredInterfaceRead]
    monitorable_items: list[SnmpDiscoveryItemRead]