"""Author RAG Chatbot SaaS — Chatbot API Schemas."""

from pydantic import BaseModel, EmailStr, Field


class ChatRequest(BaseModel):
    """Incoming chat message from the widget."""

    session_id: str
    message: str = Field(..., min_length=1, max_length=2000)
    selected_book_id: str | None = None
    ask_all_books: bool = False


class LinkItem(BaseModel):
    label: str
    url: str
    type: str
    icon: str


class BookSelectorItem(BaseModel):
    id: str
    title: str
    tagline: str | None
    cover_url: str | None


class ChatResponse(BaseModel):
    """Response from one chat turn."""

    text: str
    links: list[LinkItem] = []
    has_links: bool = False
    book_selector: list[BookSelectorItem] | None = None
    session_id: str
    intent: str = "question"
    follow_ups: list[str] = []


class BookInfo(BaseModel):
    id: str
    title: str
    tagline: str | None
    cover_path: str | None
    ai_summary: str | None = None
    purchase_url: str | None = None


class FarewellRequest(BaseModel):
    session_id: str
    selected_book_id: str | None = None


class SessionInitRequest(BaseModel):
    """Optional body for session/init — carries the visitor_uid from widget localStorage.

    The widget sends the visitor_uid it stored on the previous visit.
    If absent or null, the server generates a new one (first visit).

    HF Spaces note: Using request body instead of cookies because
    the widget runs inside an iframe (third-party context) where
    cookies are blocked by Safari ITP and Firefox ETP.
    """

    visitor_uid: str | None = Field(
        default=None,
        min_length=36,
        max_length=36,
        description="UUID previously returned by session/init and stored in widget localStorage.",
    )
    visitor_name: str | None = Field(
        default=None,
        min_length=1,
        max_length=100,
        description="Visitor display name collected before first chat.",
    )
    visitor_email: EmailStr | None = Field(
        default=None,
        description="Visitor email collected before first chat.",
    )


class WidgetAppearanceResponse(BaseModel):
    """Subscription-authenticated widget chrome (theme/position/auto-open).

    Used before chat opens so the bubble matches Widget Config without
    creating a session (profile gate may block session/init).
    """

    bot_name: str
    widget_theme: str
    widget_position: str
    widget_auto_open_delay: int = 0
    require_visitor_profile: bool = True


class SessionInitResponse(BaseModel):
    """Response from session initialization."""

    session_id: str
    bot_name: str
    welcome_message: str
    widget_theme: str
    widget_position: str = "bottom-right"
    widget_auto_open_delay: int = 0
    books: list[BookInfo]
    show_book_selector: bool
    visitor_uid: str
    require_visitor_profile: bool = True
    profile_complete: bool = True
    visitor_name: str | None = None
    visitor_email: str | None = None
    remove_branding: bool = False
    custom_widget_css: str | None = None


# ── Phase 7: Polling Streaming ────────────────────────────────────────────────

class StreamStartResponse(BaseModel):
    """Returned immediately when a streaming job is queued.

    Phase 7: Replaces SSE (blocked by nginx). Widget polls /poll/{job_id}
    until status='done', then renders the full response.
    """
    job_id: str
    status: str = "queued"


class PollResponse(BaseModel):
    """Returned on each poll of /poll/{job_id}.

    status: 'pending' | 'done' | 'error'
    result: only present when status='done'
    error: only present when status='error'
    """
    job_id: str
    status: str
    result: ChatResponse | None = None
    error: str | None = None


# ── Visitor Interaction Schemas (Phase 6B for chat.py) ───────────────────────

class TrackClickRequest(BaseModel):
    """Track purchase/preview link click."""
    session_id: str | None = None
    book_id: str | None = None
    link_type: str = "unknown"


class FeedbackRequest(BaseModel):
    """Thumbs up/down on a bot message."""
    session_id: str | None = None
    message_index: int | None = Field(None, ge=0)
    reaction: str = Field(..., pattern=r"^(up|down)$")


class RateSessionRequest(BaseModel):
    """Star rating for a chat session."""
    session_id: str | None = None
    rating: int = Field(..., ge=1, le=5)