"""Request/response models for the auth API (SPEC §9.1)."""

from __future__ import annotations

import uuid
from typing import Literal

from pydantic import BaseModel, Field


class RegisterRequest(BaseModel):
    localpart: str = Field(min_length=3, max_length=30)
    password: str = Field(min_length=8, max_length=128)
    recovery_email: str | None = None
    # A friend's invitation (app/identity/invitations.py): signs up even while
    # public registration is closed, and is used up by it.
    invite: str | None = Field(default=None, max_length=200)


class LoginRequest(BaseModel):
    # Accepts either a bare localpart or the full ``localpart@domain`` handle.
    handle: str = Field(min_length=1, max_length=320)
    password: str = Field(min_length=1, max_length=1024)
    totp: str | None = None  # required when the account has 2FA enabled
    # With a correct code: don't ask this browser for one again (trusted device).
    remember_device: bool = False


class TotpSetupResponse(BaseModel):
    secret: str  # base32, for manual entry
    provisioning_uri: str  # otpauth:// URI to render as a QR code


class TotpEnableRequest(BaseModel):
    code: str = Field(min_length=6, max_length=10)


class TotpDisableRequest(BaseModel):
    password: str = Field(min_length=1, max_length=1024)


class SessionOut(BaseModel):
    sid: str
    created: str
    ua: str
    current: bool


class PasswordResetRequestIn(BaseModel):
    handle: str = Field(min_length=1, max_length=320)


class PasswordResetIn(BaseModel):
    token: str = Field(min_length=1)
    password: str = Field(min_length=8, max_length=128)
    totp: str | None = None  # required when the account has 2FA enabled


class PasswordResetCheckIn(BaseModel):
    token: str = Field(min_length=1)


class PasswordResetCheckOut(BaseModel):
    valid: bool
    # Tells the page to expect the 2FA step; only the link's holder learns it.
    totp_required: bool = False


class AppPasswordIn(BaseModel):
    name: str = Field(min_length=1, max_length=60)  # "Thunderbird on laptop"
    password: str = Field(min_length=1, max_length=1024)  # the account password, to confirm


class AppPasswordOut(BaseModel):
    id: str
    name: str
    created_at: str
    last_used_at: str | None = None


class AppPasswordCreatedOut(AppPasswordOut):
    # The generated password itself: in this answer only, never again.
    app_password: str


class RecoveryEmailIn(BaseModel):
    password: str = Field(min_length=1, max_length=1024)
    # None (or blank) removes the recovery address.
    recovery_email: str | None = Field(default=None, max_length=320)


class UserOut(BaseModel):
    id: uuid.UUID
    handle: str
    recovery_email: str | None
    settings: dict[str, object]
    totp_enabled: bool = False
    is_admin: bool = False
    # The hosted mail server's name for mail apps (IMAP 993, SMTP 465/587), or
    # None when there are no hosted mailboxes (SPEC App. D).
    mail_host: str | None = None


class InvitationCheckIn(BaseModel):
    token: str = Field(min_length=1, max_length=200)


class InvitationCheckOut(BaseModel):
    valid: bool
    invitee_name: str = ""
    inviter_name: str = ""


class RegistrationStatusOut(BaseModel):
    """Public, unauthenticated: what the signup page should show."""

    open: bool
    # True when the instance has no users yet, so signup creates the administrator.
    bootstrap: bool
    # The domain every handle lives under (localpart@domain), shown beside the
    # handle field.
    domain: str


class AdminSettingsOut(BaseModel):
    registration_open: bool
    default_quota_bytes: int
    # Users may send friends sign-up invitations (app/identity/invitations.py).
    invitations_enabled: bool


class AdminSettingsIn(BaseModel):
    """Merge semantics: omitted fields are left as they are."""

    registration_open: bool | None = None
    invitations_enabled: bool | None = None
    # Applies to users created after the change; existing mailboxes keep theirs.
    default_quota_bytes: int | None = Field(default=None, gt=0)


class AdminMailOut(BaseModel):
    smtp_host: str
    smtp_port: int
    smtp_security: str
    smtp_username: str
    # The password itself never leaves the server.
    has_password: bool
    smtp_from: str
    public_url: str
    # Host, From address and public address are all set: reset mail can go out.
    configured: bool


class AdminMailIn(BaseModel):
    """Merge semantics: omitted fields are left as they are."""

    smtp_host: str | None = Field(default=None, max_length=255)
    smtp_port: int | None = Field(default=None, ge=1, le=65535)
    smtp_security: Literal["starttls", "ssl", "none"] | None = None
    smtp_username: str | None = Field(default=None, max_length=320)
    # Omitted keeps the stored password; an empty string removes it.
    smtp_password: str | None = Field(default=None, max_length=1024)
    smtp_from: str | None = Field(default=None, max_length=320)
    public_url: str | None = Field(default=None, max_length=500)


class AdminInviteTemplateOut(BaseModel):
    # Empty strings: the built-in subject / template / sender is used.
    subject: str
    html: str
    from_address: str
    default_subject: str
    default_html: str
    default_from: str
    placeholders: list[str]


class AdminInviteTemplateIn(BaseModel):
    """Merge semantics: omitted fields are left as they are; an empty string
    goes back to the built-in one."""

    subject: str | None = Field(default=None, max_length=300)
    html: str | None = None
    from_address: str | None = Field(default=None, max_length=320)


class AdminInvitePreviewIn(BaseModel):
    subject: str = Field(default="", max_length=300)
    html: str = ""


class AdminInvitePreviewOut(BaseModel):
    subject: str
    html: str


class AdminMailTestIn(BaseModel):
    to: str = Field(min_length=3, max_length=320)


class AdminUserOut(BaseModel):
    id: uuid.UUID
    handle: str
    is_admin: bool
    # ISO timestamp while blocked; null otherwise.
    blocked_at: str | None
    quota_bytes: int
    used_bytes: int
    created_at: str
    # The user's connected mail accounts, so the admin can tell who this is.
    accounts: list[str]


class AdminUserPatch(BaseModel):
    """Merge semantics: omitted fields are left as they are."""

    quota_bytes: int | None = Field(default=None, gt=0)
    blocked: bool | None = None


class MessageOut(BaseModel):
    status: str = "ok"