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

from pydantic import BaseModel


# ── Notifications ──────────────────────────────────────────────────────────────

# ── Bill Notes ────────────────────────────────────────────────────────────────

class BillNoteSchema(BaseModel):
    id: int
    bill_id: str
    content: str
    pinned: bool
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class BillNoteUpsert(BaseModel):
    content: str
    pinned: bool = False


# ── Notifications ──────────────────────────────────────────────────────────────

class NotificationSettingsResponse(BaseModel):
    ntfy_topic_url: str = ""
    ntfy_auth_method: str = "none"  # none | token | basic
    ntfy_token: str = ""
    ntfy_username: str = ""
    ntfy_password: str = ""
    ntfy_enabled: bool = False
    rss_enabled: bool = False
    rss_token: Optional[str] = None
    # Digest
    digest_enabled: bool = False
    digest_frequency: str = "daily"  # daily | weekly
    # Quiet hours — stored as local-time hour integers (0-23); timezone is IANA name
    quiet_hours_start: Optional[int] = None
    quiet_hours_end: Optional[int] = None
    timezone: Optional[str] = None  # IANA name, e.g. "America/New_York"
    alert_filters: Optional[dict] = None

    model_config = {"from_attributes": True}


class NotificationSettingsUpdate(BaseModel):
    ntfy_topic_url: Optional[str] = None
    ntfy_auth_method: Optional[str] = None
    ntfy_token: Optional[str] = None
    ntfy_username: Optional[str] = None
    ntfy_password: Optional[str] = None
    ntfy_enabled: Optional[bool] = None
    rss_enabled: Optional[bool] = None
    digest_enabled: Optional[bool] = None
    digest_frequency: Optional[str] = None
    quiet_hours_start: Optional[int] = None
    quiet_hours_end: Optional[int] = None
    timezone: Optional[str] = None  # IANA name sent by the browser on save
    alert_filters: Optional[dict] = None


class NotificationEventSchema(BaseModel):
    id: int
    bill_id: str
    event_type: str
    payload: Optional[Any] = None
    dispatched_at: Optional[datetime] = None
    created_at: datetime

    model_config = {"from_attributes": True}


class NtfyTestRequest(BaseModel):
    ntfy_topic_url: str
    ntfy_auth_method: str = "none"
    ntfy_token: str = ""
    ntfy_username: str = ""
    ntfy_password: str = ""


class FollowModeTestRequest(BaseModel):
    mode: str        # pocket_veto | pocket_boost
    event_type: str  # new_document | new_amendment | bill_updated


class NotificationTestResult(BaseModel):
    status: str  # "ok" | "error"
    detail: str
    event_count: Optional[int] = None  # RSS only

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
    effectiveness_score: Optional[float] = None
    effectiveness_percentile: Optional[float] = None
    effectiveness_tier: Optional[str] = None
    latest_trend: Optional["MemberTrendScoreSchema"] = 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
    share_token: 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}


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

    model_config = {"from_attributes": True}


class MemberNewsArticleSchema(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}


# ── 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
    bill_category: Optional[str] = None
    has_document: bool = False

    model_config = {"from_attributes": True}


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


# ── 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
    follow_mode: str = "neutral"
    created_at: datetime

    model_config = {"from_attributes": True}


class FollowModeUpdate(BaseModel):
    follow_mode: str


# ── 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
    api_keys_configured: dict[str, bool]


# ── Collections ────────────────────────────────────────────────────────────────

class CollectionCreate(BaseModel):
    name: str
    is_public: bool = False

    def validate_name(self) -> str:
        name = self.name.strip()
        if not 1 <= len(name) <= 100:
            raise ValueError("name must be 1–100 characters")
        return name


class CollectionUpdate(BaseModel):
    name: Optional[str] = None
    is_public: Optional[bool] = None


class CollectionSchema(BaseModel):
    id: int
    name: str
    slug: str
    is_public: bool
    share_token: str
    bill_count: int
    created_at: datetime

    model_config = {"from_attributes": True}


class CollectionDetailSchema(CollectionSchema):
    bills: list[BillSchema]


class BriefShareResponse(BaseModel):
    brief: BriefSchema
    bill: BillSchema


# ── Votes ──────────────────────────────────────────────────────────────────────

class MemberVotePositionSchema(BaseModel):
    bioguide_id: Optional[str] = None
    member_name: Optional[str] = None
    party: Optional[str] = None
    state: Optional[str] = None
    position: str

    model_config = {"from_attributes": True}


class BillVoteSchema(BaseModel):
    id: int
    congress: int
    chamber: str
    session: int
    roll_number: int
    question: Optional[str] = None
    description: Optional[str] = None
    vote_date: Optional[date] = None
    yeas: Optional[int] = None
    nays: Optional[int] = None
    not_voting: Optional[int] = None
    result: Optional[str] = None
    source_url: Optional[str] = None
    positions: list[MemberVotePositionSchema] = []

    model_config = {"from_attributes": True}