from datetime import date, datetime
from typing import Any, Generic, Optional, TypeVar

from pydantic import BaseModel

T = TypeVar("T")


class PaginatedResponse(BaseModel, Generic[T]):
    items: list[T]
    total: int
    page: int
    per_page: int
    pages: int


# ── Member ────────────────────────────────────────────────────────────────────

class MemberSchema(BaseModel):
    bioguide_id: str
    name: str
    first_name: Optional[str] = None
    last_name: Optional[str] = None
    party: Optional[str] = None
    state: Optional[str] = None
    chamber: Optional[str] = None
    district: Optional[str] = None
    photo_url: Optional[str] = None
    official_url: Optional[str] = None
    congress_url: Optional[str] = None
    birth_year: Optional[str] = None
    address: Optional[str] = None
    phone: Optional[str] = None
    terms_json: Optional[list[Any]] = None
    leadership_json: Optional[list[Any]] = None
    sponsored_count: Optional[int] = None
    cosponsored_count: Optional[int] = None

    model_config = {"from_attributes": True}


# ── Bill Brief ────────────────────────────────────────────────────────────────

class BriefSchema(BaseModel):
    id: int
    brief_type: str = "full"
    summary: Optional[str] = None
    key_points: Optional[list[Any]] = None
    risks: Optional[list[Any]] = None
    deadlines: Optional[list[dict[str, Any]]] = None
    topic_tags: Optional[list[str]] = None
    llm_provider: Optional[str] = None
    llm_model: Optional[str] = None
    govinfo_url: Optional[str] = None
    created_at: Optional[datetime] = None

    model_config = {"from_attributes": True}


# ── Bill Action ───────────────────────────────────────────────────────────────

class BillActionSchema(BaseModel):
    id: int
    action_date: Optional[date] = None
    action_text: Optional[str] = None
    action_type: Optional[str] = None
    chamber: Optional[str] = None

    model_config = {"from_attributes": True}


# ── News Article ──────────────────────────────────────────────────────────────

class NewsArticleSchema(BaseModel):
    id: int
    source: Optional[str] = None
    headline: Optional[str] = None
    url: Optional[str] = None
    published_at: Optional[datetime] = None
    relevance_score: Optional[float] = None

    model_config = {"from_attributes": True}


# ── Trend Score ───────────────────────────────────────────────────────────────

class TrendScoreSchema(BaseModel):
    score_date: date
    newsapi_count: int
    gnews_count: int
    gtrends_score: float
    composite_score: float

    model_config = {"from_attributes": True}


# ── Bill ──────────────────────────────────────────────────────────────────────

class BillSchema(BaseModel):
    bill_id: str
    congress_number: int
    bill_type: str
    bill_number: int
    title: Optional[str] = None
    short_title: Optional[str] = None
    introduced_date: Optional[date] = None
    latest_action_date: Optional[date] = None
    latest_action_text: Optional[str] = None
    status: Optional[str] = None
    chamber: Optional[str] = None
    congress_url: Optional[str] = None
    sponsor: Optional[MemberSchema] = None
    latest_brief: Optional[BriefSchema] = None
    latest_trend: Optional[TrendScoreSchema] = None
    updated_at: Optional[datetime] = None

    model_config = {"from_attributes": True}


class BillDetailSchema(BillSchema):
    actions: list[BillActionSchema] = []
    news_articles: list[NewsArticleSchema] = []
    trend_scores: list[TrendScoreSchema] = []
    briefs: list[BriefSchema] = []


# ── Follow ────────────────────────────────────────────────────────────────────

class FollowCreate(BaseModel):
    follow_type: str  # bill | member | topic
    follow_value: str


class FollowSchema(BaseModel):
    id: int
    user_id: int
    follow_type: str
    follow_value: str
    created_at: datetime

    model_config = {"from_attributes": True}


# ── Settings ──────────────────────────────────────────────────────────────────

# ── Auth ──────────────────────────────────────────────────────────────────────

class UserCreate(BaseModel):
    email: str
    password: str


class UserResponse(BaseModel):
    id: int
    email: str
    is_admin: bool
    notification_prefs: dict
    created_at: Optional[datetime] = None

    model_config = {"from_attributes": True}


class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"
    user: "UserResponse"


# ── Settings ──────────────────────────────────────────────────────────────────

class SettingUpdate(BaseModel):
    key: str
    value: str


class SettingsResponse(BaseModel):
    llm_provider: str
    llm_model: str
    congress_poll_interval_minutes: int
    newsapi_enabled: bool
    pytrends_enabled: bool