"""Data model definitions for all connectors"""
from dataclasses import dataclass
from datetime import datetime
from typing import Any, Optional, List, Sequence, NamedTuple
from typing_extensions import TypedDict, NotRequired
from pydantic import BaseModel
from enum import Enum


@dataclass(frozen=True)
class ExternalAccess:

    # arbitrary limit to prevent excessively large permissions sets
    # not internally enforced ... the caller can check this before using the instance
    MAX_NUM_ENTRIES = 5000

    # Emails of external users with access to the doc externally
    external_user_emails: set[str]
    # Names or external IDs of groups with access to the doc
    external_user_group_ids: set[str]
    # Whether the document is public in the external system or Onyx
    is_public: bool

    def __str__(self) -> str:
        """Prevent extremely long logs"""

        def truncate_set(s: set[str], max_len: int = 100) -> str:
            s_str = str(s)
            if len(s_str) > max_len:
                return f"{s_str[:max_len]}... ({len(s)} items)"
            return s_str

        return (
            f"ExternalAccess("
            f"external_user_emails={truncate_set(self.external_user_emails)}, "
            f"external_user_group_ids={truncate_set(self.external_user_group_ids)}, "
            f"is_public={self.is_public})"
        )

    @property
    def num_entries(self) -> int:
        return len(self.external_user_emails) + len(self.external_user_group_ids)

    @classmethod
    def public(cls) -> "ExternalAccess":
        return cls(
            external_user_emails=set(),
            external_user_group_ids=set(),
            is_public=True,
        )

    @classmethod
    def empty(cls) -> "ExternalAccess":
        """
        A helper function that returns an *empty* set of external user-emails and group-ids, and sets `is_public` to `False`.
        This effectively makes the document in question "private" or inaccessible to anyone else.

        This is especially helpful to use when you are performing permission-syncing, and some document's permissions can't
        be determined (for whatever reason). Setting its `ExternalAccess` to "private" is a feasible fallback.
        """

        return cls(
            external_user_emails=set(),
            external_user_group_ids=set(),
            is_public=False,
        )


class ExtractionResult(NamedTuple):
    """Structured result from text and image extraction from various file types."""

    text_content: str
    embedded_images: Sequence[tuple[bytes, str]]
    metadata: dict[str, Any]


class TextSection(BaseModel):
    """Text section model"""
    link: str
    text: str


class ImageSection(BaseModel):
    """Image section model"""
    link: str
    image_file_id: str


class Document(BaseModel):
    """Document model"""
    id: str
    source: str
    semantic_identifier: str
    extension: str
    blob: bytes
    doc_updated_at: datetime
    size_bytes: int
    externale_access: Optional[ExternalAccess] = None
    primary_owners: Optional[list] = None
    metadata: Optional[dict[str, Any]] = None
    doc_metadata: Optional[dict[str, Any]] = None
    # Opaque, connector-supplied fingerprint stored in Document.content_hash for
    # change-detection. 32-char hex string; format is per-source (xxhash128 of
    # bytes for local uploads, xxhash128(ETag) for blob storage, etc.). When set
    # on a yielded Document, the orchestrator persists it as content_hash and
    # skips the post-download xxhash128(blob) recomputation.
    fingerprint: Optional[str] = None


class KeyRecord(BaseModel):
    """One entry returned by a FingerprintConnector.list_keys() call.

    A KeyRecord is the cheap-listing primitive: connector enumerates all keys
    it has, attaches a fingerprint when the source exposes one, and the
    orchestrator only fetches content when the fingerprint differs from what's
    persisted.
    """
    key: str
    fingerprint: Optional[str] = None
    deleted: bool = False


class BasicExpertInfo(BaseModel):
    """Expert information model"""
    display_name: Optional[str] = None
    first_name: Optional[str] = None
    last_name: Optional[str] = None
    email: Optional[str] = None

    def get_semantic_name(self) -> str:
        """Get semantic name for display"""
        if self.display_name:
            return self.display_name
        elif self.first_name and self.last_name:
            return f"{self.first_name} {self.last_name}"
        elif self.first_name:
            return self.first_name
        elif self.last_name:
            return self.last_name
        else:
            return "Unknown"


class SlimDocument(BaseModel):
    """Simplified document model (contains only ID and permission info)"""
    id: str
    external_access: Optional[Any] = None


class ConnectorCheckpoint(BaseModel):
    """Connector checkpoint model"""
    has_more: bool = True


class DocumentFailure(BaseModel):
    """Document processing failure information"""
    document_id: str
    document_link: str


class EntityFailure(BaseModel):
    """Entity processing failure information"""
    entity_id: str
    missed_time_range: tuple[datetime, datetime]


class ConnectorFailure(BaseModel):
    """Connector failure information"""
    failed_document: Optional[DocumentFailure] = None
    failed_entity: Optional[EntityFailure] = None
    failure_message: str
    exception: Optional[Exception] = None

    model_config = {"arbitrary_types_allowed": True}


# Gmail Models
class GmailCredentials(BaseModel):
    """Gmail authentication credentials model"""
    primary_admin_email: str
    credentials: dict[str, Any]


class GmailThread(BaseModel):
    """Gmail thread data model"""
    id: str
    messages: list[dict[str, Any]]


class GmailMessage(BaseModel):
    """Gmail message data model"""
    id: str
    payload: dict[str, Any]
    label_ids: Optional[list[str]] = None


# Notion Models
class NotionPage(BaseModel):
    """Represents a Notion Page object"""
    id: str
    created_time: str
    last_edited_time: str
    archived: bool
    properties: dict[str, Any]
    url: str
    parent: Optional[dict[str, Any]] = None  # Parent reference for path reconstruction
    database_name: Optional[str] = None  # Only applicable to database type pages


class NotionBlock(BaseModel):
    """Represents a Notion Block object"""
    id: str  # Used for the URL
    text: str
    prefix: str  # How this block should be joined with existing text


class NotionSearchResponse(BaseModel):
    """Represents the response from the Notion Search API"""
    results: list[dict[str, Any]]
    next_cursor: Optional[str]
    has_more: bool = False


class NotionCredentials(BaseModel):
    """Notion authentication credentials model"""
    integration_token: str


# Slack Models
class ChannelTopicPurposeType(TypedDict):
    """Slack channel topic or purpose"""
    value: str
    creator: str
    last_set: int


class ChannelType(TypedDict):
    """Slack channel"""
    id: str
    name: str
    is_channel: bool
    is_group: bool
    is_im: bool
    created: int
    creator: str
    is_archived: bool
    is_general: bool
    unlinked: int
    name_normalized: str
    is_shared: bool
    is_ext_shared: bool
    is_org_shared: bool
    pending_shared: List[str]
    is_pending_ext_shared: bool
    is_member: bool
    is_private: bool
    is_mpim: bool
    updated: int
    topic: ChannelTopicPurposeType
    purpose: ChannelTopicPurposeType
    previous_names: List[str]
    num_members: int


class AttachmentType(TypedDict):
    """Slack message attachment"""
    service_name: NotRequired[str]
    text: NotRequired[str]
    fallback: NotRequired[str]
    thumb_url: NotRequired[str]
    thumb_width: NotRequired[int]
    thumb_height: NotRequired[int]
    id: NotRequired[int]


class BotProfileType(TypedDict):
    """Slack bot profile"""
    id: NotRequired[str]
    deleted: NotRequired[bool]
    name: NotRequired[str]
    updated: NotRequired[int]
    app_id: NotRequired[str]
    team_id: NotRequired[str]


class MessageType(TypedDict):
    """Slack message"""
    type: str
    user: str
    text: str
    ts: str
    attachments: NotRequired[List[AttachmentType]]
    bot_id: NotRequired[str]
    app_id: NotRequired[str]
    bot_profile: NotRequired[BotProfileType]
    thread_ts: NotRequired[str]
    subtype: NotRequired[str]


# Thread message list
ThreadType = List[MessageType]


class SlackCheckpoint(TypedDict):
    """Slack checkpoint"""
    channel_ids: List[str] | None
    channel_completion_map: dict[str, str]
    current_channel: ChannelType | None
    current_channel_access: Any | None
    seen_thread_ts: List[str]
    has_more: bool


class SlackMessageFilterReason(str):
    """Slack message filter reason"""
    BOT = "bot"
    DISALLOWED = "disallowed"


class ProcessedSlackMessage:
    """Processed Slack message"""
    def __init__(self, doc=None, thread_or_message_ts=None, filter_reason=None, failure=None):
        self.doc = doc
        self.thread_or_message_ts = thread_or_message_ts
        self.filter_reason = filter_reason
        self.failure = failure


class SeafileSyncScope(str, Enum):
    """Defines how much of SeaFile to synchronise."""
    ACCOUNT = "account"      # All libraries the token can see
    LIBRARY = "library"      # A single library (repo)
    DIRECTORY = "directory"  # A single directory inside a library
# Type aliases for type hints
SecondsSinceUnixEpoch = float
GenerateDocumentsOutput = Any
GenerateSlimDocumentOutput = Any
CheckpointOutput = Any