"""TypedDict schemas for every state collector's return value.

Single source of truth for the state-store data shapes. The Markdown
reference is ``docs/state-model.md``.
"""

from typing import Any, TypedDict

__all__ = [
    "AcmeAccount",
    "AcmeCert",
    "AcmeState",
    "CpuLoad",
    "DnsmasqDhcpLease",
    "DnsmasqState",
    "DnsmasqStatus",
    "FirewallInterface",
    "FirewallState",
    "FirewallZone",
    "MemoryStats",
    "NetworkdInterface",
    "NetworkdState",
    "NginxDomain",
    "NginxState",
    "SwapStats",
    "SystemState",
    "TrafficStats",
    "WgClassStatus",
    "WgPeer",
    "WgState",
    "WgStatus",
    "WgStatusPeer",
]


# ── Shared notes ───────────────────────────────────────────────
# Every collector return carries a top-level `timestamp` (ISO-8601).
# Subsystems with a declarative config expose pending state as a
# status dict: `status: {"pending_changes": bool}`, except firewall,
# which uses `pending: {config_pending() result}`.

# ── Firewall ──────────────────────────────────────────────────


class FirewallInterface(TypedDict):
    """A network interface as parsed from `ip link` / `ip addr`.

    Attributes:
        name: Interface name (e.g. "eth0").
        mac: MAC address, or ``None`` if unavailable.
        state: Link state from `ip link` ("UP", "DOWN", "UNKNOWN", ...).
        mtu: MTU value, or ``None`` if unavailable.
        ips: IPv4 addresses as "ip/prefix" strings.
        ipv6: IPv6 addresses as "ip/prefix" strings.
        zone: Assigned firewalld zone name, or ``None``.
    """

    name: str
    mac: str | None
    state: str
    mtu: int | None
    ips: list[str]
    ipv6: list[str]
    zone: str | None


class FirewallZone(TypedDict, total=False):
    """A firewalld zone as parsed from `--list-all-zones`.

    The zone dict carries the HYPHENATED key "rich-rules" (see
    ``lib.firewall._parse_all_zones_output``), which TypedDict fields
    cannot express. Additional firewalld keys may also appear:
    "sources", "ports", "protocols", "forward-ports", "ics",
    "icmp-blocks", "module", "rich-rules".
    """

    target: str
    interfaces: list[str]
    services: list[str]
    masquerade: bool
    # snake_case `rich_rules` exists only at the top-level FirewallState
    # (collector re-derivation, lib/state.py); the zone dict itself uses
    # the hyphenated "rich-rules" key.
    rich_rules: list[str]


class FirewallState(TypedDict):
    """Complete firewalld state (collector: `_collect_firewall`).

    Attributes:
        config: Contents of config/firewall/config.json.
        active_zones: Zone name → assigned interfaces.
        default_zone: firewalld default zone name ("--get-default-zone");
            catch-all zone for interfaces with no explicit assignment.
        interfaces: All system interfaces (see FirewallInterface).
        available_services: firewalld service catalog ("--get-services").
        service_descriptions: Service name to one-line description, parsed
            from the firewalld service XML definitions
            (``lib.firewall.get_service_descriptions``).
        uncovered_interfaces: Network-config interfaces (excluding ``lo``/``wg*``) not in any live zone (advisory coverage warning, always present).
        zones: All zones as runtime dicts (see FirewallZone).
        rich_rules: Zone name → raw firewalld rich-rule strings.
        pending: config_pending() result:
            ``{pending: [...], needs_apply: bool,
            unmanaged_zones: {zone: {interfaces: [...]}}}``.
        timestamp: ISO-8601 collection time.
    """

    config: dict[str, Any]
    active_zones: dict[str, list[str]]
    default_zone: str
    interfaces: list[FirewallInterface]
    available_services: list[str]
    service_descriptions: dict[str, str]
    uncovered_interfaces: list[str]
    zones: dict[str, FirewallZone]
    rich_rules: dict[str, list[str]]
    pending: dict[str, Any]
    timestamp: str


# ── Dnsmasq ───────────────────────────────────────────────────


class DnsmasqDhcpLease(TypedDict):
    """A single dnsmasq DHCP lease from the lease file.

    Attributes:
        expires: ISO-8601 expiry timestamp, or "" if unparseable.
        mac: Client MAC address.
        ip: Leased IP address.
        hostname: Client hostname (may be "").
        interface: Interface the lease was granted on (may be "").
    """

    expires: str
    mac: str
    ip: str
    hostname: str
    interface: str


class PendingChange(TypedDict):
    """One field-level difference between the applied config and the current
    saved config (see `lib.common.deep_diff`).

    Attributes:
        path: Dotted (or indexed) path to the changed field.
        action: "added", "removed", or "changed".
        old: Value in the last applied config (None when added).
        new: Value in the current config (None when removed).
    """

    path: str
    action: str
    old: Any
    new: Any


class DnsmasqStatus(TypedDict):
    """Dnsmasq service status snapshot.

    Attributes:
        service_active: Whether the dnsmasq systemd unit is active.
        config_file_exists: Whether the rendered .conf is on disk.
        active_leases: Count of currently active leases.
        pending_changes: Whether the config is dirty vs the applied state.
        pending_diff: Field-level changes since the last apply (empty when
            up to date or when no applied snapshot is recorded).
    """

    service_active: bool
    config_file_exists: bool
    active_leases: int
    pending_changes: bool
    pending_diff: list[PendingChange]


class DnsmasqState(TypedDict):
    """Dnsmasq state (collector: `_collect_dnsmasq`).

    Attributes:
        config: config/dnsmasq/config.json, deep-merged with defaults.
        status: Service/config status (see DnsmasqStatus).
        leases: Active DHCP leases.
        timestamp: ISO-8601 collection time.
    """

    config: dict[str, Any]
    status: DnsmasqStatus
    leases: list[DnsmasqDhcpLease]
    timestamp: str


# ── Nginx ─────────────────────────────────────────────────────


class NginxDomain(TypedDict, total=False):
    """One flattened domain+path entry (see `_resolve_paths`).

    Attributes:
        domain: Domain name (config key).
        path: Path prefix for this entry.
        backend: Resolved backend config dict.
        online: Whether a site .conf exists on disk.
        force_ssl: Redirect-to-HTTPS flag.
        backend_name: Backend config key this domain points at.
        cert: Certificate reference (e.g. "acme", "selfsigned", ...).
        is_management: Management UI path marker.
        is_websocket: WebSocket-capable path marker.
    """

    domain: str
    path: str
    backend: dict[str, Any]
    online: bool
    force_ssl: bool
    backend_name: str
    cert: str | None
    is_management: bool
    is_websocket: bool


class NginxState(TypedDict):
    """Nginx state (collector: `_collect_nginx`).

    Attributes:
        config: config/nginx/config.json.
        domains: Flattened domain entries (one per domain+path).
        status: ``{"pending_changes": bool}``.
        timestamp: ISO-8601 collection time.
    """

    config: dict[str, Any]
    domains: list[NginxDomain]
    status: dict[str, Any]
    timestamp: str


# ── ACME ──────────────────────────────────────────────────────


class AcmeAccount(TypedDict):
    """ACME account status (see `_parse_account_conf`).

    Attributes:
        registered: Whether an account exists.
        email: Registered email ("" when not registered).
        ca: Human-readable CA name ("" when not registered).
        key_length: Account key size, or ``None``.
    """

    registered: bool
    email: str
    ca: str
    key_length: int | None


class AcmeCert(TypedDict, total=False):
    """One certificate entry from `list_certs()` output.

    Attributes:
        domain: Certificate domain name.
        expiry: Expiry date string.
        renewed: Last renewal date string.
        status: "valid" | "expired" | "active" | ...
        days_remaining: Days until expiry.

    Additional keys from `lib.acme.list_certs()` output may appear.
    """

    domain: str
    expiry: str
    renewed: str
    status: str
    days_remaining: int


class AcmeState(TypedDict):
    """ACME state (collector: `_collect_acme`).

    Attributes:
        certs: Certificate list (empty when collection failed).
        email: Registered ACME email.
        account: Account status (see AcmeAccount).
        status: Collection status; ``error`` is ``None`` on success or
            the failure message when cert collection was not possible.
        timestamp: ISO-8601 collection time.
    """

    certs: list[AcmeCert]
    email: str
    account: AcmeAccount
    status: dict[str, str | None]
    timestamp: str


# ── WireGuard ─────────────────────────────────────────────────
# The collector tracks BOTH a legacy single interface (wg0) and one
# wg-<class> interface per access class.


class WgStatusPeer(TypedDict):
    """A runtime peer parsed from `wg show` output.

    Attributes:
        public_key: Peer public key.
        endpoint: Last-seen endpoint, or ``None``.
        allowed_ips: Allowed IP/CIDR list.
        latest_handshake: Human-readable last handshake time, or ``None``.
        transfer_received: Received-bytes string from the transfer line.
        transfer_sent: Sent-bytes string from the transfer line.
        persistent_keepalive: Keepalive seconds, or ``None``.
    """

    public_key: str
    endpoint: str | None
    allowed_ips: list[str]
    latest_handshake: str | None
    transfer_received: str
    transfer_sent: str
    persistent_keepalive: int | None


class WgClassStatus(TypedDict):
    """Runtime status for one wg-<class> interface.

    Attributes:
        up: Whether the class interface is up.
        interface: ``{public_key, listen_port}`` (empty when down).
        peers: Runtime peers of this class interface.
    """

    up: bool
    interface: dict[str, Any]
    peers: list[WgStatusPeer]


class WgStatus(TypedDict):
    """Aggregated WireGuard runtime status.

    Attributes:
        up: True when any managed interface is up.
        interface: Legacy single-interface info (public_key, listen_port).
        peers: Legacy single-interface runtime peers.
        classes: Per-access-class runtime status (keyed by class name).
        pending_changes: Whether the config is dirty vs the applied state.
        pending_diff: Field-level changes since the last apply (empty when
            up to date or when no applied snapshot is recorded).
    """

    up: bool
    interface: dict[str, Any]
    peers: list[WgStatusPeer]
    classes: dict[str, WgClassStatus]
    pending_changes: bool
    pending_diff: list[PendingChange]


class WgPeer(TypedDict, total=False):
    """A config-file peer (``private_key`` stripped).

    Attributes:
        name: Peer config key.
        public_key: Peer public key.
        endpoint: Configured endpoint, or ``None``.
        allowed_ips: Allowed IP/CIDR list.
        persistent_keepalive: Keepalive seconds, or ``None``.
        preshared_key: Preshared key, or ``None``.
    """

    name: str
    public_key: str
    endpoint: str | None
    allowed_ips: list[str]
    persistent_keepalive: int | None
    preshared_key: str | None


class WgState(TypedDict):
    """WireGuard state (collector: `_collect_wireguard`).

    Attributes:
        config: config/wireguard/config.json; ``private_key`` stripped
            from the interface AND from every access class.
        status: Runtime status (see WgStatus).
        peers: Config peers, private keys stripped.
        timestamp: ISO-8601 collection time.
    """

    config: dict[str, Any]
    status: WgStatus
    peers: list[WgPeer]
    timestamp: str


# ── Networkd ──────────────────────────────────────────────────
# Matches parse_networkctl_status() output exactly (lib/network.py).
# There is a single combined `addresses` list — no separate
# `ipv6_addresses` or `routes` keys.


class NetworkdInterface(TypedDict):
    """One networkd interface as parsed by `parse_networkctl_status`.

    Attributes:
        addresses: "ip/prefix" entries, IPv4+IPv6 combined.
        gateway: Default-route gateway, or ``None``.
        dns: Configured DNS server list.
        mac: MAC address, or ``None``.
        state: OperationalState (e.g. "routable", "degraded", "off").
        link: Link type (e.g. "ether", "loopback", ...).
    """

    addresses: list[str]
    gateway: str | None
    dns: list[str]
    mac: str | None
    state: str
    link: str


class NetworkdState(TypedDict):
    """Networkd state (collector: `_collect_networkd`).

    Attributes:
        config: config/network/config.json.
        interfaces: Runtime state keyed by interface name.
        status: ``{"pending_changes": bool}``.
        timestamp: ISO-8601 collection time.
    """

    config: dict[str, Any]
    interfaces: dict[str, NetworkdInterface]
    status: dict[str, Any]
    timestamp: str


# ── System ────────────────────────────────────────────────────


class CpuLoad(TypedDict):
    """CPU load averages (see /proc/loadavg).

    Attributes:
        load1: 1-minute load average.
        load5: 5-minute load average.
        load15: 15-minute load average.
    """

    load1: float
    load5: float
    load15: float


class MemoryStats(TypedDict):
    """Memory usage (see /proc/meminfo).

    Attributes:
        total: Total memory in bytes.
        available: Available memory in bytes.
        used: Used memory in bytes.
        used_pct: Used percentage (0-100), rounded to 0.1.
    """

    total: int
    available: int
    used: int
    used_pct: float


class SwapStats(TypedDict):
    """Swap usage (see /proc/meminfo).

    Attributes:
        total: Total swap in bytes.
        used: Used swap in bytes.
        used_pct: Used percentage (0-100), rounded to 0.1.
    """

    total: int
    used: int
    used_pct: float


class TrafficStats(TypedDict):
    """Per-interface traffic counters (see /sys/class/net/<iface>/statistics).

    Attributes:
        rx_bytes: Total bytes received.
        tx_bytes: Total bytes transmitted.
        rx_packets: Total packets received.
        tx_packets: Total packets transmitted.
    """

    rx_bytes: int
    tx_bytes: int
    rx_packets: int
    tx_packets: int


class SystemState(TypedDict):
    """System-wide metrics (collector: `_collect_system`).

    Attributes:
        load: CPU load averages (see CpuLoad).
        memory: Memory usage (see MemoryStats).
        swap: Swap usage (see SwapStats).
        traffic: Per-interface counters keyed by interface name.
        timestamp: ISO-8601 collection time.
    """

    load: CpuLoad
    memory: MemoryStats
    swap: SwapStats
    traffic: dict[str, TrafficStats]
    timestamp: str