"""Pydantic models for the Transcription system."""

from pydantic import BaseModel, Field
from typing import Optional, List
from datetime import datetime


# --- Session Models ---

class TranscriptionSessionCreate(BaseModel):
    user_id: str
    title: Optional[str] = None
    canvas_type: str = "teaching-canvas"


class TranscriptionSessionUpdate(BaseModel):
    title: Optional[str] = None
    ended_at: Optional[datetime] = None
    timetable_period_id: Optional[str] = None
    timetable_event_type: Optional[str] = None
    timetable_event_label: Optional[str] = None
    auto_tagged: Optional[bool] = None
    llm_provider: Optional[str] = None
    llm_model: Optional[str] = None


class TranscriptionSessionResponse(BaseModel):
    id: str
    user_id: str
    title: Optional[str] = None
    canvas_type: str
    started_at: datetime
    ended_at: Optional[datetime] = None
    duration_seconds: Optional[int] = None
    timetable_period_id: Optional[str] = None
    timetable_event_type: Optional[str] = None
    timetable_event_label: Optional[str] = None
    auto_tagged: bool = False
    llm_provider: Optional[str] = None
    llm_model: Optional[str] = None
    word_count: int = 0
    segment_count: int = 0
    metadata: dict = {}
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


class SessionListResponse(BaseModel):
    sessions: List[TranscriptionSessionResponse]
    total: int
    page: int
    page_size: int


# --- Segment Models ---

class TranscriptionSegmentCreate(BaseModel):
    session_id: str
    sequence_index: int
    text: str
    start_seconds: float
    end_seconds: float
    is_final: bool = True
    speaker_label: Optional[str] = None
    keyword_matches: Optional[List[str]] = None


class TranscriptionSegmentResponse(BaseModel):
    id: str
    session_id: str
    sequence_index: int
    text: str
    start_seconds: float
    end_seconds: float
    is_final: bool = True
    speaker_label: Optional[str] = None
    keyword_matches: Optional[List[str]] = None
    created_at: datetime

    class Config:
        from_attributes = True


# --- Canvas Event Models ---

class CanvasEventCreate(BaseModel):
    session_id: Optional[str] = None
    user_id: str
    timestamp: Optional[datetime] = None
    session_elapsed_seconds: Optional[float] = None
    event_type: str
    event_payload: dict = {}
    canvas_snapshot_url: Optional[str] = None
    tldraw_page_id: Optional[str] = None
    tldraw_shape_ids: Optional[List[str]] = None


class CanvasEventResponse(BaseModel):
    id: str
    session_id: Optional[str] = None
    user_id: str
    timestamp: datetime
    session_elapsed_seconds: Optional[float] = None
    event_type: str
    event_payload: dict = {}
    canvas_snapshot_url: Optional[str] = None
    tldraw_page_id: Optional[str] = None
    tldraw_shape_ids: Optional[List[str]] = None

    class Config:
        from_attributes = True


# --- Summary Models ---

class SummaryGenerateRequest(BaseModel):
    summary_type: str  # full_lesson, questions_asked, teaching_style, key_moments, segment
    provider: str  # anthropic, openai, ollama, openrouter, google
    model: str
    api_key: str  # from frontend user settings, passed per-request
    segment_range: Optional[List[Optional[int]]] = None  # [start, end], null = all
    include_canvas_snapshots: bool = False


class SummaryResponse(BaseModel):
    id: str
    session_id: str
    user_id: str
    summary_type: str
    content: str
    prompt_used: Optional[str] = None
    llm_provider: str
    llm_model: str
    input_tokens: Optional[int] = None
    output_tokens: Optional[int] = None
    segment_range_start: Optional[int] = None
    segment_range_end: Optional[int] = None
    canvas_snapshot_urls: Optional[List[str]] = None
    created_at: datetime

    class Config:
        from_attributes = True


# --- Keyword Watch Models ---

class KeywordWatchCreate(BaseModel):
    user_id: str
    keyword: str
    match_type: str = "contains"  # contains, exact, starts_with, regex
    action: str = "log"  # log, alert, canvas_shape, webhook


class KeywordWatchResponse(BaseModel):
    id: str
    user_id: str
    keyword: str
    match_type: str = "contains"
    action: str = "log"
    is_active: bool = True
    created_at: datetime

    class Config:
        from_attributes = True


# --- Keyword Event Models ---

class KeywordEventCreate(BaseModel):
    session_id: str
    segment_id: Optional[str] = None
    keyword_watch_id: Optional[str] = None
    keyword_text: str
    matched_in_text: str
    session_elapsed_seconds: Optional[float] = None


class KeywordEventResponse(BaseModel):
    id: str
    session_id: str
    segment_id: Optional[str] = None
    keyword_watch_id: Optional[str] = None
    keyword_text: str
    matched_in_text: str
    session_elapsed_seconds: Optional[float] = None
    created_at: datetime

    class Config:
        from_attributes = True


# --- Export Models ---

class ExportFormat(BaseModel):
    format: str  # srt, txt, json


# --- Timetable Models ---

class CurrentPeriodResponse(BaseModel):
    period_id: Optional[str] = None
    event_type: Optional[str] = None
    event_label: Optional[str] = None
    start_time: Optional[datetime] = None
    end_time: Optional[datetime] = None