"""Ban management Pydantic models.

Request, response, and domain models used by the ban router and service.
"""

from typing import Literal

from pydantic import BaseModel, ConfigDict, Field

# ---------------------------------------------------------------------------
# Time-range selector
# ---------------------------------------------------------------------------

#: The four supported time-range presets for the dashboard views.
TimeRange = Literal["24h", "7d", "30d", "365d"]

#: Number of seconds represented by each preset.
TIME_RANGE_SECONDS: dict[str, int] = {
    "24h": 24 * 3600,
    "7d": 7 * 24 * 3600,
    "30d": 30 * 24 * 3600,
    "365d": 365 * 24 * 3600,
}


class BanRequest(BaseModel):
    """Payload for ``POST /api/bans`` (ban an IP)."""

    model_config = ConfigDict(strict=True)

    ip: str = Field(..., description="IP address to ban.")
    jail: str = Field(..., description="Jail in which to apply the ban.")


class UnbanRequest(BaseModel):
    """Payload for ``DELETE /api/bans`` (unban an IP)."""

    model_config = ConfigDict(strict=True)

    ip: str = Field(..., description="IP address to unban.")
    jail: str | None = Field(
        default=None,
        description="Jail to remove the ban from. ``null`` means all jails.",
    )
    unban_all: bool = Field(
        default=False,
        description="When ``true`` the IP is unbanned from every jail.",
    )


class Ban(BaseModel):
    """Domain model representing a single active or historical ban record."""

    model_config = ConfigDict(strict=True)

    ip: str = Field(..., description="Banned IP address.")
    jail: str = Field(..., description="Jail that issued the ban.")
    banned_at: str = Field(..., description="ISO 8601 UTC timestamp of the ban.")
    expires_at: str | None = Field(
        default=None,
        description="ISO 8601 UTC expiry timestamp, or ``null`` if permanent.",
    )
    ban_count: int = Field(..., ge=1, description="Number of times this IP was banned.")
    country: str | None = Field(
        default=None,
        description="ISO 3166-1 alpha-2 country code resolved from the IP.",
    )


class BanResponse(BaseModel):
    """Response containing a single ban record."""

    model_config = ConfigDict(strict=True)

    ban: Ban


class BanListResponse(BaseModel):
    """Paginated list of ban records."""

    model_config = ConfigDict(strict=True)

    bans: list[Ban] = Field(default_factory=list)
    total: int = Field(..., ge=0, description="Total number of matching records.")


class ActiveBan(BaseModel):
    """A currently active ban entry returned by ``GET /api/bans/active``."""

    model_config = ConfigDict(strict=True)

    ip: str = Field(..., description="Banned IP address.")
    jail: str = Field(..., description="Jail holding the ban.")
    banned_at: str | None = Field(default=None, description="ISO 8601 UTC start of the ban.")
    expires_at: str | None = Field(
        default=None,
        description="ISO 8601 UTC expiry, or ``null`` if permanent.",
    )
    ban_count: int = Field(default=1, ge=1, description="Running ban count for this IP.")
    country: str | None = Field(default=None, description="ISO 3166-1 alpha-2 country code.")


class ActiveBanListResponse(BaseModel):
    """List of all currently active bans across all jails."""

    model_config = ConfigDict(strict=True)

    bans: list[ActiveBan] = Field(default_factory=list)
    total: int = Field(..., ge=0)


# ---------------------------------------------------------------------------
# Dashboard ban-list view models
# ---------------------------------------------------------------------------


class DashboardBanItem(BaseModel):
    """A single row in the dashboard ban-list table.

    Populated from the fail2ban database and enriched with geo data.
    """

    model_config = ConfigDict(strict=True)

    ip: str = Field(..., description="Banned IP address.")
    jail: str = Field(..., description="Jail that issued the ban.")
    banned_at: str = Field(..., description="ISO 8601 UTC timestamp of the ban.")
    service: str | None = Field(
        default=None,
        description="First matched log line — used as context for the ban.",
    )
    country_code: str | None = Field(
        default=None,
        description="ISO 3166-1 alpha-2 country code, or ``null`` if unknown.",
    )
    country_name: str | None = Field(
        default=None,
        description="Human-readable country name, or ``null`` if unknown.",
    )
    asn: str | None = Field(
        default=None,
        description="Autonomous System Number string (e.g. ``'AS3320'``).",
    )
    org: str | None = Field(
        default=None,
        description="Organisation name associated with the IP.",
    )
    ban_count: int = Field(..., ge=1, description="How many times this IP was banned.")


class DashboardBanListResponse(BaseModel):
    """Paginated dashboard ban-list response."""

    model_config = ConfigDict(strict=True)

    items: list[DashboardBanItem] = Field(default_factory=list)
    total: int = Field(..., ge=0, description="Total bans in the selected time window.")
    page: int = Field(..., ge=1)
    page_size: int = Field(..., ge=1)


class BansByCountryResponse(BaseModel):
    """Response for the bans-by-country aggregation endpoint.

    Contains a per-country ban count, a human-readable country name map, and
    the full (un-paginated) ban list for the selected time window so the
    frontend can render both the world map and its companion table from a
    single request.
    """

    model_config = ConfigDict(strict=True)

    countries: dict[str, int] = Field(
        default_factory=dict,
        description="ISO 3166-1 alpha-2 country code → ban count.",
    )
    country_names: dict[str, str] = Field(
        default_factory=dict,
        description="ISO 3166-1 alpha-2 country code → human-readable country name.",
    )
    bans: list[DashboardBanItem] = Field(
        default_factory=list,
        description="All bans in the selected time window (up to the server limit).",
    )
    total: int = Field(..., ge=0, description="Total ban count in the window.")