from sqlmodel import SQLModel, Field
from typing import Optional
from datetime import datetime, timezone

class User(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    gitea_id: Optional[int] = Field(default=None, unique=True, index=True)
    username: str = Field(unique=True, index=True)
    password_hash: Optional[str] = None
    full_name: Optional[str] = None
    email: Optional[str] = Field(default=None, unique=True)
    organization: Optional[str] = None
    role: str = Field(default="student")
    is_active: bool = Field(default=True)
    is_verified: bool = Field(default=False)
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class UserSession(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    session_token: str = Field(unique=True, index=True)
    user_id: int = Field(foreign_key="user.id")
    ip_address: Optional[str] = None
    user_agent: Optional[str] = None
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class Event(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    title: str
    event_type: str = Field(default="lecture")
    start_time: datetime
    end_time: datetime
    location: Optional[str] = None
    description: Optional[str] = None
    status: str = Field(default="scheduled")
    is_public: bool = Field(default=True)
    google_event_id: Optional[str] = Field(default=None, unique=True, index=True)
    manually_edited: bool = Field(default=False)
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class GlobalStatus(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    status: str = Field(default="free")
    delay_minutes: int = Field(default=0)
    message: Optional[str] = None
    updated_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class Project(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    title: str
    description: Optional[str] = None
    status: str = Field(default="idea")
    visibility: str = Field(default="public")
    gitea_url: Optional[str] = None
    gitea_repo: Optional[str] = None
    owner_id: int = Field(foreign_key="user.id")
    tags: Optional[str] = None
    start_date: Optional[str] = None
    end_date: Optional[str] = None
    contact_person: Optional[str] = None
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class ProjectMember(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    project_id: int = Field(foreign_key="project.id")
    user_id: int = Field(foreign_key="user.id")
    role: str = Field(default="viewer")
    joined_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class ProjectTask(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    project_id: int = Field(foreign_key="project.id")
    title: str
    description: Optional[str] = None
    status: str = Field(default="backlog")
    priority: str = Field(default="medium")
    assignee_id: Optional[int] = Field(default=None, foreign_key="user.id")
    created_by: int = Field(foreign_key="user.id")
    due_date: Optional[str] = None
    position: int = Field(default=0)
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
    updated_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class PortalFile(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    original_name: str
    stored_name: str 
    size_bytes: int
    uploaded_by: int = Field(foreign_key="user.id")
    project_id: Optional[int] = Field(default=None, foreign_key="project.id")
    uploaded_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class EventSubscriber(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    email: str = Field(index=True)
    user_id: Optional[int] = Field(default=None, foreign_key="user.id")
    unsubscribe_token: str = Field(unique=True, index=True)
    is_confirmed: bool = Field(default=False)
    confirm_token: Optional[str] = Field(default=None, unique=True, index=True)
    notify_status: bool = Field(default=True)
    notify_events: bool = Field(default=True)
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

# ══════════════════════════════════════════════════════════════════════
# МАСТЕР-КЛАССЫ
# ══════════════════════════════════════════════════════════════════════

class Workshop(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    title: str
    description: Optional[str] = None
    program: Optional[str] = None
    lead_id: int = Field(foreign_key="user.id")
    category: str = Field(default="other")
    difficulty: str = Field(default="beginner")       # beginner, intermediate, advanced
    partner: Optional[str] = None                     # ННГУ, Неймарк, Ядро, ...
    status: str = Field(default="draft")              # draft, published, archived
    visibility: str = Field(default="public")         # public, internal
    location: Optional[str] = None
    materials_required: Optional[str] = None
    outcome: Optional[str] = None                     # что получит участник
    has_certificate: bool = Field(default=False)
    max_participants: Optional[int] = None
    cover_url: Optional[str] = None
    tags: Optional[str] = None
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class WorkshopSession(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    workshop_id: int = Field(foreign_key="workshop.id")
    start_time: datetime
    end_time: datetime
    location_override: Optional[str] = None
    note: Optional[str] = None

class WorkshopRegistration(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    workshop_id: int = Field(foreign_key="workshop.id")
    user_id: int = Field(foreign_key="user.id")
    status: str = Field(default="registered")
    notes: Optional[str] = None
    registered_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class WorkshopMaterial(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    workshop_id: int = Field(foreign_key="workshop.id")
    title: str
    description: Optional[str] = None
    file_id: Optional[int] = Field(default=None, foreign_key="portalfile.id")
    external_url: Optional[str] = None
    visible_to: str = Field(default="registered")
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

class WorkshopFeedback(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    workshop_id: int = Field(foreign_key="workshop.id")
    user_id: int = Field(foreign_key="user.id")
    rating: int = Field(default=5)
    comment: Optional[str] = None
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))

# ══════════════════════════════════════════════════════════════════════
# УВЕДОМЛЕНИЯ
# ══════════════════════════════════════════════════════════════════════

class Notification(SQLModel, table=True):
    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="user.id", index=True)
    title: str
    body: Optional[str] = None
    link_url: Optional[str] = None
    kind: str = Field(default="info")                 # info, success, warning, error
    is_read: bool = Field(default=False, index=True)
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))